EVALUATION KIT AVAILABLE
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
LE
AVAILAB
General Description
The MAX2828/MAX2829 single-chip, RF transceiver ICs
are designed specifically for OFDM 802.11 WLAN applications. The MAX2828 is designed for single-band
802.11a applications covering world-band frequencies
of 4.9GHz to 5.875GHz. The MAX2829 is designed for
dual-band 802.11a/g applications covering world-bands
of 2.4GHz to 2.5GHz and 4.9GHz to 5.875GHz. The ICs
include all circuitry required to implement the RF transceiver function, providing a fully integrated receive path,
transmit path, VCO, frequency synthesizer, and baseband/control interface. Only the PA, RF switches, RF
bandpass filters (BPF), RF baluns, and a small number
of passive components are needed to form the complete RF front-end solution.
Each IC completely eliminates the need for external SAW
filters by implementing on-chip monolithic filters for both
the receiver and transmitter. The baseband filtering and
the Rx/Tx signal paths are optimized to meet the
802.11a/g IEEE standards and cover the full range of the
required data rates (6, 9, 12, 18, 24, 36, 48, and 54Mbps
for OFDM; 1, 2, 5.5, and 11Mbps for CCK/DSSS), at
receiver sensitivity levels up to 10dB better than 802.11a/g
standards. The MAX2828/MAX2829 transceivers are available in the small 56-pin, exposed paddle thin QFN package.
Applications
Single-/Dual-Band 802.11a/b/g Radios
4.9GHz Public Safety Radios
2.4GHz/5GHz MIMO and Smart Antenna Systems
Features
♦ World-Band Operation
MAX2828: 4.9GHz to 5.875GHz (802.11a)
MAX2829: 2.4GHz to 2.5GHz and 4.9GHz to
5.875GHz (802.11a/b/g)
♦ Best-In-Class Transceiver Performance
-75dBm Rx Sensitivity at 54Mbps (802.11g)
-46dB (802.11g)/-51dB (802.11a) Tx Sideband
Suppression
1.5% (802.11g) and 2% (802.11a) Tx EVM
-100dBc/Hz (802.11g)/-95dBc/Hz (802.11a)
LO Phase Noise
Programmable Baseband Lowpass Filters
Integrated PLL with 3-Wire Serial Interface
93dB (802.11g)/97dB (802.11a) Receiver GainControl Range
200ns Rx I/Q DC Settling
60dB Dynamic Range Rx RSSI
30dB Tx Power-Control Range
Tx/Rx I/Q Error Detection
I/Q Analog Baseband Interface for Tx and Rx
Digital Mode Selection (Tx, Rx, Standby, and
Power Down)
Supports Both Serial and Parallel Gain Control
♦ MIMO and Smart Antenna Compatibility
Coherent LO Phase Among Multiple
Transceivers
♦ Support 40MHz Channel Bandwidth (Turbo Mode)
♦ Single +2.7V to +3.6V Supply
♦ 1µA Low-Power Shutdown Mode
♦ Small 56-Pin TQFN Package (8mm x 8mm)
RXBBQ-
RXBBQ+
RXBBI-
RXBBI+
VCC
B1
VCC
B2
GND
VCC
B3
B4
B5
TOP VIEW
VCC
Functional Diagrams
Pin Configurations
56 55 54 53 52 51 50 49 48 47 46 45 44 43
B6
1
42 RXHP
VCC
2
41 RXENA
B7
3
40 RSSI
N.C.
4
39 SHDN
GND
5
38 VCC
RXRFH
6
37 BYPASS
GND
7
TXRFH+
8
TXRFH-
9
34 GND
VCC
10
33 CPOUT
N.C.
11
32 GND
N.C.
12
31 VCC
TXENA
13
30 ROSC
PABIAS
14
29 LD
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX2828 ETN
-40°C to +85°C
56 TQFN-EP* (T5688-2)
MAX2829 ETN
-40°C to +85°C
*EP = Exposed paddle.
56 TQFN-EP* (T5688-2)
36 TUNE
MAX2828
35 GND
15 16 17 18 19 20 21 22 23 24 25 26 27 28
CS
SCLK
DIN
VCC
GND
VREF
VCC
RBIAS
VCC
TXBBQ-
TXBBQ+
TXBBI-
VCC
TXBBI+
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
Pin Configurations continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-3455; Rev 0; 10/04
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
ABSOLUTE MAXIMUM RATINGS
RF Input Power ...............................................................+10dBm
Continuous Power Dissipation (TA = +70°C)
56-Pin Thin QFN (derate 31.3mW/°C above +70°C)....2500mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
VCC, TXRFH_, TXRFL_ to GND..............................-0.3V to +4.2V
RXRFH, RXRFL, TXBBI_, TXBBQ_, ROSC, RXBBI_, RXBBQ_,
RSSI, PABIAS, VREF, CPOUT, RXENA, TXENA, SHDN, CS,
SCLK, DIN, B_, RXHP, LD, RBIAS,
BYPASS to GND ....................................-0.3V to (VCC + 0.3V)
RXBBI_, RXBBQ_, RSSI, PABIAS, VREF, CPOUT,
LD Short-Circuit Duration...................................................10s
CAUTION! ESD SENSITIVE DEVICE
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(MAX2828/MAX2829 evaluation kits: VCC = 2.7V to 3.6V, Rx/Tx set to maximum gain, RBIAS = 11kΩ, no signal at RF inputs, all RF
inputs and outputs terminated into 50Ω, receiver baseband outputs are open, no signal applied to Tx I/Q BB inputs in Tx mode,
fREFOSC = 40MHz, registers set to default settings and corresponding test mode, T A = -40°C to +85°C, unless otherwise noted.
Typical values are at VCC = +2.7V and TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETERS
Supply Voltage
CONDITIONS
MIN
2.7
Shutdown mode, reference oscillator not applied, VIL = 0
TA = +25°C
802.11g MAX2829
TA = -40°C to +85°C
Standby
mode
TA = +25°C
802.11a
MAX2828/MAX2829
TA = -40°C to +85°C
802.11g MAX2829
Rx mode
802.11a
MAX2828/MAX2829
802.11g MAX2829
Tx mode
Supply Current
Rx I/Q Output Common-Mode
Voltage
2
TYP
1
37
44
118
151
158
TA = +25°C
135
TA = -40°C to +85°C
180
188
TA = +25°C
124
TA = -40°C to +85°C
164
175
142
TA = -40°C to +85°C
184
197
Standby
mode
(MIMO)
(Note 2)
802.11g MAX2829
TA = +25°C
65
802.11a
MAX2828/MAX2829
TA = +25°C
70
Rx mode
(MIMO)
(Note 2)
802.11g MAX2829
TA = +25°C
136
802.11a
MAX2828/MAX2829
TA = +25°C
154
Tx mode
(MIMO)
(Note 2)
802.11g MAX2829
TA = +25°C
139
802.11a
MAX2828/MAX2829
TA = +25°C
157
Tx calibration mode,
TA = +25°C
802.11g MAX2829
129
802.11a MAX2828/MAX2829
147
RX calibration mode,
TA = +25°C
802.11g MAX2829
188
802.11a MAX2828/MAX2829
210
TA = +25°C
51
55
TA = -40°C to +85°C
TA = +25°C
UNITS
V
µA
51
TA = +25°C
802.11a
MAX2828/MAX2829
MAX
3.6
100
47
0.80
0.9
mA
1.05
V
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
DC ELECTRICAL CHARACTERISTICS (continued)
(MAX2828/MAX2829 evaluation kits: VCC = 2.7V to 3.6V, Rx/Tx set to maximum gain, RBIAS = 11kΩ, no signal at RF inputs, all RF
inputs and outputs terminated into 50Ω, receiver baseband outputs are open, no signal applied to Tx I/Q BB inputs in Tx mode,
fREFOSC = 40MHz, registers set to default settings and corresponding test mode, T A = -40°C to +85°C, unless otherwise noted.
Typical values are at VCC = +2.7V and TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETERS
Rx I/Q Output Common-Mode
Voltage Variation
CONDITIONS
TA = -40°C (relative to +25°C)
MIN
TA = +85°C (relative to +25°C)
Tx Baseband Input CommonMode Voltage Operating Range
TYP
-25
0.9
-1mA < IOUT < +1mA
1.3
V
13
µA
1.2
V
VCC 0.4
Digital Input-Voltage High, VIH
UNITS
mV
20
Tx Baseband Input Bias Current
Reference Voltage Output
MAX
V
Digital Input-Voltage Low, VIL
0.4
V
-1
+1
µA
Digital Input-Current Low, IIL
-1
+1
µA
LD Output-Voltage High, VOH
Sourcing 100µA
VCC 0.4
LD Output-Voltage Low, VOL
Sinking 100µA
Digital Input-Current High, IIH
V
0.4
V
AC ELECTRICAL CHARACTERISTICS—802.11g Rx Mode (MAX2829)
(MAX2829 evaluation kit: VCC = +2.7V, fIN = 2.437GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz,
SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.)
(Tables 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
2.500
GHz
RECEIVER SECTION: LNA RF INPUT TO BASEBAND I/Q OUTPUTS
RF Input Frequency Range
RF Input Return Loss
2.412
With 50Ω external
match
Maximum gain,
B7:B1 = 1111111
Total Voltage Gain
Minimum gain,
B7:B1 = 0000000
LNA high-gain mode (B7:B6 = 11)
-22
LNA medium-gain mode
(B7:B6 = 10)
-24
LNA low-gain mode (B7:B6 = 0X)
-12
TA = +25°C
87
TA = -40°C to +85°C (Note 1)
85
TA = +25°C
dB
94
dB
1
From high-gain mode (B7:B6 = 11) to medium-gain
mode (B7:B6 = 10) (Note 3)
-15.5
From high-gain mode (B7:B6 = 11) to low-gain mode
(B7:B6 = 0X) (Note 3)
-30.5
5.5
RF Gain Steps
dB
Gain Variation Over RF Band
fRF = 2.412GHz to 2.5GHz
Baseband Gain Range
From maximum baseband gain (B5:B1 = 11111) to
minimum baseband gain (B5:B1 = 00000)
Maxim Integrated
3
62
dB
dB
3
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11g Rx Mode (MAX2829) (continued)
(MAX2829 evaluation kit: VCC = +2.7V, fIN = 2.437GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz,
SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.)
(Tables 1, 2, 3)
PARAMETER
DSB Noise Figure
Output P-1dB
Out-of-Band Input IP3
In-Band Input P-1dB
In-Band Input IP3
CONDITIONS
MIN
TYP
Voltage gain ≥ 65dB, with B7:B6 = 11
3.5
Voltage gain = 50dB, with B7:B6 = 11
4
Voltage gain = 45dB, with B7:B6 = 10
16
Voltage gain = 15dB, with B7:B6 = 0X
36
Voltage gain = 90dB, with B7:B6 = 11
3.2
-35dBm jammers at
40MHz and 78MHz
offset; based on IM3
at 2MHz
Voltage gain = 60dB,
with B7:B6 = 11
-10
Voltage gain = 45dB,
with B7:B6 = 10
-2
Voltage gain = 40dB,
with B7:B6 = 0X
21
Voltage gain = 40dB, with B7:B6 = 11
-29
Voltage gain = 25dB, with B7:B6 = 10
-14
Voltage gain = 5dB, with B7:B6 = 0X
2
Tones at 7MHz and
8MHz, IM3 at 6MHz
and 9MHz, PIN =
-40dBm per tone
Voltage gain = 40dB,
with B7:B6 = 11
-17
Voltage gain = 25dB,
with B7:B6 = 10
-5
Voltage gain = 5dB,
with B7:B6 = 0X
14
MAX
UNITS
dB
VP-P
dBm
dBm
dBm
I/Q Phase Error
B7:B1 = 1101110, 1σ variation
±0.5
degrees
I/Q Gain Imbalance
B7:B1 = 1101110, 1σ variation
±0.1
dB
Tx-to-Rx Conversion Gain for Rx
I/Q Calibration
B7:B1 = 0010101 (Note 4)
-4
dB
I/Q Static DC Offset
RXHP = 1, B7:B1 = 1101110, 1σ variation
±2
mV
I/Q DC Droop
After switching RXHP to 0, D2 = 0 (see the RX
Control/RSSI Register Definition section)
±1
mV/ms
RF Gain-Change Settling Time
Gain change from high gain to medium gain, high gain to
low gain, or medium gain to low gain; gain settling to
within ±2dB of steady state
0.4
µs
Baseband VGA Settling Time
Gain change from B5:B1 = 10111 to B5:B1 = 00111;
gain settling to within ±2dB of steady state
0.1
µs
Minimum differential resistance
10
kΩ
Maximum differential capacitance
8
pF
-67
dBm
Rx I/Q Output Load Impedance
Spurious Signal Emissions at LNA
RF = 1GHz to 26.5GHz
Input
4
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11g Rx Mode (MAX2829) (continued)
(MAX2829 evaluation kit: VCC = +2.7V, fIN = 2.437GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC = 40MHz,
SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.)
(Tables 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RECEIVER BASEBAND FILTERS
Baseband -3dB Corner
Frequency
Baseband Filter Rejection
(Nominal Mode)
(See the Lowpass
Filter Register
section)
Narrowband mode
7.5
Nominal mode
9.5
Turbo mode 1
14
Turbo mode 2
18
fBASEBAND = 15MHz
20
fBASEBAND = 20MHz
39
fBASEBAND > 40MHz
84
RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI
Register Definition section)
0.5
RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI
Register Definition section)
0.52
RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI
Register Definition section)
2
RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI
Register Definition section)
2.5
RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI
Register Definition section)
22.5
MHz
dB
RSSI
RSSI Minimum Output Voltage
V
V
RSSI Maximum Output Voltage
RSSI Slope
mV/dB
RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI
Register Definition section)
RSSI Output Settling Time
Maxim Integrated
To within 3dB of steady
state
30
+40dB signal step
0.2
-40dB signal step
0.7
µs
5
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11a Rx Mode (MAX2828/MAX2829)
(MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fIN = 5.25GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC =
40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RECEIVER SECTION: LNA RF INPUT TO BASEBAND I/Q OUTPUTS
RF Input Frequency Range
RF Input Return Loss
802.11a low-band mode
4.900
5.350
802.11a high-band mode
5.470
5.875
With 50Ω external
match
LNA high-gain mode (B7:B6 = 11)
-15
LNA medium-gain mode
(B7:B6 = 10)
-11
LNA low-gain mode (B7:B6 = 0X)
Maximum gain,
B7:B1 = 1111111
Total Voltage Gain
Minimum gain,
B7:B1 = 0000000
91
TA = -40°C to +85°C (Note 1)
88
From high-gain mode (B7:B6 = 11) to medium-gain
mode (B7:B6 = 10) (Note 3)
97
dB
0
Baseband Gain Range
DSB Noise Figure
Output P-1dB
Out-of-Band Input IP3
In-Band Input P-1dB
6
3
-19
RF Gain Steps
Gain Variation Relative to
5.25GHz
dB
-7
TA = +25°C
TA = +25°C
GHz
dB
From high-gain mode (B7:B6 = 11) to low-gain mode
(B7:B6 = 0X) (Note 3)
-34.5
fRF = 4.9GHz
-0.3
fRF = 5.35GHz
0.4
fRF = 5.875GHz
-4
From maximum baseband gain (B5:B1 = 11111) to
minimum baseband gain (B5:B1 = 00000)
62
Voltage gain ≥ 65dB, with B7:B6 = 11
4.5
Voltage gain = 50dB, with B7:B6 = 11
4.8
Voltage gain = 45dB, with B7:B6 = 10
15
Voltage gain = 15dB, with B7:B6 = 0X
36
Voltage gain = 90dB, with B7:B6 = 11
3.2
-35dBm jammers at
40MHz and 78MHz
offset; based on IM3
at 2MHz
Voltage gain = 60dB,
with B7:B6 = 11
-15
Voltage gain = 45dB,
with B7:B6 = 10
0.5
Voltage gain = 40dB,
with B7:B6 = 0X
20
Voltage gain = 35dB, with B7:B6 = 11
-32
Voltage gain = 20dB, with B7:B6 = 10
-12
Voltage gain = 5dB, with B7:B6 = 0X
3
dB
dB
dB
VP-P
dBm
dBm
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11a Rx Mode (MAX2828/MAX2829) (continued)
(MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fIN = 5.25GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC =
40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3)
PARAMETER
In-Band Input IP3
CONDITIONS
Tones at 7MHz and
8MHz, IM3 at 6MHz
and 9MHz, PIN =
-40dBm per tone
MIN
TYP
Voltage gain = 35dB,
with B7:B6 = 11
-24
Voltage gain = 20dB,
with B7:B6 = 10
-5
Voltage gain = 5dB,
with B7:B6 = 0X
13
MAX
UNITS
dBm
I/Q Phase Error
B7:B1 = 1101110, 1σ variation
±0.4
degrees
I/Q Gain Imbalance
B7:B1 = 1101110, 1σ variation
±0.1
dB
Tx-to-Rx Conversion Gain for Rx
I/Q Calibration
B7:B1 = 0001111 (Note 4)
0
dB
I/Q Static DC Offset
RXHP = 1, B7:B1 = 1101110, 1σ variation
±2
mV
I/Q DC Droop
After switching RXHP to 0, D2 = 0 (see the Rx
Control/RSSI Register Definition section)
±1
mV/ms
RF Gain-Change Settling Time
Gain change from high gain to medium gain, high gain to
low gain, or medium gain to low gain; gain settling to
within ±2dB of steady state
0.4
µs
Baseband VGA Settling Time
Gain change from B5:B1 = 10111 to B5:B1 = 00111;
gain settling to within ±2dB of steady state
0.1
µs
Minimum differential resistance
10
kΩ
Maximum differential capacitance
8
pF
-50
dBm
Rx I/Q Output Load Impedance
Spurious Signal Emissions at LNA
RF = 1GHz to 26.5GHz
input
RECEIVER BASEBAND FILTERS
Baseband -3dB Corner
Frequency
Baseband Filter Rejection
(Nominal Mode)
Maxim Integrated
(See the Lowpass
Filter Register
Definition section)
Narrow-band mode
7.5
Nominal mode
9.5
Turbo mode 1
14
Turbo mode 2
18
fBASEBAND = 15MHz
20
fBASEBAND = 20MHz
39
fBASEBAND > 40MHz
80
MHz
dB
7
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11a Rx Mode (MAX2828/MAX2829) (continued)
(MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fIN = 5.25GHz; receiver baseband I/Q outputs at 112mVRMS (-19dBV), fREFOSC =
40MHz, SHDN = RXENA = CS = high, RXHP = TXENA = SCLK = DIN = low, RBIAS = 11kΩ, registers set to default settings and corresponding test mode, TA = +25°C, unless otherwise noted. Unmodulated single-tone RF input signal is used, unless otherwise indicated.) (Tables 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RSSI
RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI
Register Definition section)
0.5
RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI
Register Definition section)
0.52
RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI
Register Definition section)
2
RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI
Register Definition section)
2.5
RXHP = 1, low range (D11 = 0, see the Rx Control/RSSI
Register Definition section)
22.5
RSSI Minimum Output Voltage
V
RSSI Maximum Output Voltage
V
RSSI Slope
mV/dB
RXHP = 1, high range (D11 = 1, see the Rx Control/RSSI
Register Definition section)
RSSI Output Settling Time
To within 3dB of steady
state
30
+40dB signal step
0.2
-40dB signal step
0.7
µs
AC ELECTRICAL CHARACTERISTICS—802.11g Tx Mode (MAX2829)
(MAX2829 evaluation kit: VCC = +2.7V, fOUT = 2.437GHz, fREFOSC = 40MHz, SHDN = TXENA = CS = high, RXENA = SCLK = DIN =
low, RBIAS = 11kΩ, 100mVRMS sine and cosine signal (or 100mVRMS, 54Mbps IEEE 802.11g I/Q signals wherever OFDM is mentioned) applied to baseband I/Q inputs of transmitter, registers set to default settings and corresponding test mode, TA = +25°C,
unless otherwise noted.) (Table 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTS
RF Output Frequency Range, fRF
2.412
2.500
1.5% EVM
-2.5
B6:B1 = 111011
-4.5
GHz
Output Power
54Mbps 802.11g OFDM
signal
Output Power (CW)
VIN = 100mVRMS at 1MHz I/Q CW signal, B6:B1 =
111111
Output Power Range
B6:B1 = 111111 to B6:B1 = 000000
30
dB
Carrier Leakage
Without DC offset cancellation
-27
dBc
Unwanted Sideband Suppression
Uncalibrated
-46
dBc
Tx Output ACP
Measured with 1MHz resolution bandwidth at 22MHz
offset from channel center (B6:B1 = 111011), OFDM
signal
-69
dBm/
MHz
RF Output Return Loss
With external 50Ω match
-14
dB
8
-2
dBm
dBm
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11g Tx Mode (MAX2829) (continued)
(MAX2829 evaluation kit: VCC = +2.7V, fOUT = 2.437GHz, fREFOSC = 40MHz, SHDN = TXENA = CS = high, RXENA = SCLK = DIN =
low, RBIAS = 11kΩ, 100mVRMS sine and cosine signal (or 100mVRMS, 54Mbps IEEE 802.11g I/Q signals wherever OFDM is mentioned) applied to baseband I/Q inputs of transmitter, registers set to default settings and corresponding test mode, TA = +25°C,
unless otherwise noted.) (Table 4)
PARAMETER
RF Spurious Signal Emissions
Baseband -3dB Corner
Frequency
Baseband Filter Rejection
Tx Baseband Input Impedance
CONDITIONS
MIN
TYP
2/3 x fRF
-64
B6:B1 = 111011, OFDM
signal
4/3 x fRF
-61
5/3 x fRF
-63
8/3 x fRF
-52
(See the Lowpass Filter
Register Definition
section)
Nominal mode
12
Turbo mode 1
18
Turbo mode 2
24
At 30MHz, in nominal mode (see the Lowpass Filter
Register Definition section)
Minimum differential resistance
Maximum differential capacitance
MAX
UNITS
dBm/
MHz
MHz
60
dB
60
kΩ
0.7
pF
TRANSMITTER LO LEAKAGE AND I/Q CALIBRATION USING LO LEAKAGE AND SIDEBAND DETECTOR (SEE THE Tx/Rx
CALIBRATION MODE SECTION)
Tx BASEBAND I/Q INPUTS TO RECEIVER OUTPUTS
LO Leakage and SidebandDetector Output
Amplifier Gain Range
Lower -3dB Corner Frequency
Maxim Integrated
Calibration register,
D12:D11 = 11,
A3:A0 = 0110
Output at 1 x fTONE (for LO leakage
= -29dBc), fTONE = 2MHz,
100mVRMS
-3
dBVRMS
Output at 2 x fTONE (for sideband
suppression = -40dBc), fTONE =
2MHz, 100mVRMS
D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110
-13
26
dB
1
MHz
9
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—802.11a Tx Mode (MAX2828/MAX2829)
(MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fOUT = 5.25GHz, fREFOSC = 40MHz, SHDN = TXENA = CS = high, RXENA = SCLK
= DIN = low, RBIAS = 11kΩ, 100mVRMS sine and cosine signal (or 100mVRMS, 54Mbps IEEE 802.11a I/Q signals wherever OFDM is
mentioned) applied to baseband I/Q inputs of transmitter, registers set to default settings and corresponding test mode, TA = +25°C,
unless otherwise noted.) (Table 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTS
RF Output Frequency Range, fRF
802.11a low-band mode
4.900
5.350
802.11a high-band mode
5.470
5.875
2% EVM
Output Power
54Mbps 802.11a OFDM
signal
Output Power (CW)
VIN = 100mVRMS at 1MHz I/Q CW signal, B6:B1 =
111111
Output Power Variation Relative
to 5.25GHz
B6:B1 = 111100
-5
-6.5
-4.5
fRF = 4.9GHz
-6
fRF = 5.35GHz
-0.5
fRF = 5.875GHz
-1
GHz
dBm
dBm
dB
Output Power Range
B6:B1 = 111111 to B6:B1 = 000000
30
dB
Carrier Leakage
Without DC offset cancellation
-27
dBc
Unwanted Sideband Suppression
Uncalibrated
-51
dBc
Tx Output ACP
Measured with 1MHz resolution bandwidth at 30MHz
offset from channel center (B6:B1 = 111100), OFDM
signal
-80
dBm/
MHz
RF Output Return Loss
With external 50Ω match
-16
dB
RF Spurious Signal Emissions
Baseband -3dB Corner
Frequency
Baseband Filter Rejection
Tx Baseband Input Impedance
B6:B1 = 111100,
OFDM signal
(see the Lowpass
Filter Register
Definition section)
4/5 x fRF
-55
6/5 x fRF
-64
7/5 x fRF
-65
8/5 x fRF
-49
Nominal mode
12
Turbo mode 1
18
Turbo mode 2
24
At 30MHz, in nominal mode (see the Lowpass Filter
Register Definition section)
dBm/
MHz
MHz
60
dB
Minimum differential resistance
60
kΩ
Maximum differential capacitance
0.7
pF
TRANSMITTER LO LEAKAGE AND I/Q CALIBRATION USING LO LEAKAGE AND SIDEBAND DETECTOR (SEE THE Tx/Rx
CALIBRATION MODE SECTION)
Tx BASEBAND I/Q INPUTS TO RECEIVER OUTPUTS
LO Leakage and SidebandDetector Output
Amplifier Gain Range
Lower -3dB Corner Frequency
10
Calibration register,
D12:D11 = 1, A3:A0
= 0110
Output at 1 x fTONE (for LO
leakage = -29dBc), fTONE =
2MHz, 100mVRMS
-4.5
Output at 2 x fTONE (for sideband
suppression = -40dBc), fTONE =
2MHz, 100mVRMS
-14.5
D12:D11 = 00 to D12:D11 = 11, A3:A0 = 0110
dBVRMS
26
dB
1
MHz
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—Frequency Synthesis
(MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN =
CS = high, SCLK = DIN = low, PLL loop bandwidth = 150kHz, RBIAS = 11kΩ, TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FREQUENCY SYNTHESIZER
RF Channel Center Frequency
802.11g mode
2412
2500
802.11a low-band mode
4900
5350
802.11a high-band mode
5470
5875
Charge-Pump Comparison
Frequency
Reference-Divider Ratio
fREFOSC Input Levels
AC-coupled
20
44
1
4
800
fREFOSC Input Impedance
Closed-Loop Phase Noise
802.11a
fOFFSET = 1kHz
-87
fOFFSET = 10kHz
-103
fOFFSET = 100kHz
-99
fOFFSET = 1MHz
-112
fOFFSET = 10MHz
-125
fOFFSET = 1kHz
-84
fOFFSET = 10kHz
-95
fOFFSET = 100kHz
-92
fOFFSET = 1MHz
-108
fOFFSET = 10MHz
-124
RMS phase jitter,
802.11g
integrate from 10kHz
802.11a
to 10MHz offset
Reference Spurs
kΩ
dBc/Hz
0.6
degrees
1
Charge-Pump Output Current
Charge-Pump Output Voltage
4
>70% of ICP
20MHz offset
MHz
mVP-P
10
802.11g
Closed-Loop Integrated Phase
Noise
MHz
20
fREFOSC Input Frequency
MHz
0.5
mA
VCC - 0.5V
802.11g
-65
802.11a
-58
V
dBc
VOLTAGE-CONTROLLED OSCILLATOR
VCO Tuning Voltage Range
0.4
VTUNE = 0.4V
802.11g
LO Tuning Gain
Low band
802.11a
High band
Maxim Integrated
2.3
V
135
VTUNE = 2.3V
62
VTUNE = 0.3V
324
VTUNE = 2.2V
167
VTUNE = 0.3V
330
VTUNE = 2.2V
175
MHz/V
11
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—Miscellaneous Blocks
(MAX2828/MAX2829 evaluation kits: VCC = +2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN =
CS = high, SCLK = DIN = low, RBIAS = 11kΩ, TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PA BIAS DAC
Number of Programmable Bits
6
Bits
Minimum Output Sink Current
D5:D0 = 000000 (see the PA Bias DAC Register
Definition section)
0
µA
Maximum Output Sink Current
D5:D0 = 111111 (see the PA Bias DAC Register
Definition section), output voltage = 0.8V
313
µA
Turn-On Time
D9:D6 = 0000 (see the PA Bias DAC Register Definition
section)
0.2
µs
1
LSB
DNL
ON-CHIP TEMPERATURE SENSOR
Output Voltage
D11 = 1 (see the Rx
Control/RSSI
Register Definition
section)
TA = -40°C
0.5
TA = +25°C
1.05
TA = +85°C
1.6
V
AC ELECTRICAL CHARACTERISTICS—Timing
(MAX2828/MAX2829 evaluation kits: VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN =
CS = high, SCLK = DIN = low, PLL loop bandwidth = 150kHz, RBIAS = 11kΩ, TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SYSTEM TIMING (See Figure 1)
Turn-On Time
From SHDN rising edge (PLL locked)
Shutdown Time
fRF = 2.412GHz to 2.5GHz
Channel Switching Time
Rx/Tx Turnaround Time
µs
2
µs
25
fRF = 5.15GHz to 5.35GHz
35
fRF = 5.45GHz to 5.875GHz
130
fRF = 4.9GHz to 5.875GHz
130
Measured from Tx or Rx enable
rising edge; signal settling to
within ±2dB of steady state
Rx to Tx
µs
1
µs
Tx to Rx, RXHP = 1
Tx Turn-On Time (From Standby
Mode)
From Tx enable rising edge; signal settling to within ±2dB
of steady state
Rx Turn-On Time (From Standby
Mode)
From Rx enable rising edge; signal settling to within
±2dB of steady state
12
50
1.2
1
µs
1.2
µs
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
AC ELECTRICAL CHARACTERISTICS—Timing (continued)
(MAX2828/MAX2829 evaluation kits: VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN =
CS = high, SCLK = DIN = low, PLL loop bandwidth = 150kHz, RBIAS = 11kΩ, TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
3-WIRE SERIAL INTERFACE TIMING (SEE FIGURE 2)
SCLK-Rising-Edge to CS-FallingEdge Wait Time, tCSO
6
ns
Falling Edge of CS to Rising
Edge of First SCLK Time, tCSS
6
ns
DIN-to-SCLK Setup Time, tDS
6
ns
DIN-to-SCLK Hold Time, tDH
6
ns
SCLK Pulse-Width High, tCH
6
ns
SCLK Pulse-Width Low, tCL
6
ns
Last Rising Edge of SCLK to
Rising Edge of CS or Clock to
Load Enable Setup Time, tCSH
6
ns
CS High Pulse Width, tCSW
20
ns
Time Between the Rising Edge of
CS and the Next Rising Edge of
SCLK, tCS1
6
ns
Clock Frequency, fCLK
40
MHz
Rise Time, tR
2
ns
Fall Time, tF
2
ns
Note 1: Devices are production tested at +85°C only. Min and max limits at temperatures other than +85°C are guaranteed by
design and characterization.
Note 2: Register settings for MIMO mode. A3:A0 = 0101 and A3:A0 = 0010, D13 = 1.
Note 3: The expected part-to-part variation of the RF gain step is ±1dB.
Note 4: Tx I/Q inputs = 100mVRMS. Set Tx VGA gain to max.
Table 1. Receiver Front-End Gain-Control
Settings
Table 2. Receiver Baseband VGA Gain
Settings
B7
B6
GAIN
B5:B1
1
1
High
11111
Max
1
0
Medium
11110
Max - 2dB
0
X
Low
11101
Max - 4dB
Maxim Integrated
GAIN
:
:
00000
Min
13
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 3. Receiver Baseband VGA Gain
Step Control
Table 4. Tx VGA Gain Control Settings
NUMBER
B6:B1
OUTPUT SIGNAL POWER
111111
Max
BIT
GAIN STEP (typ)
63
B1
2dB
62
111110
Max - 0.5dB
4dB
61
111101
Max - 1.0dB
B3
8dB
:
:
:
B4
16dB
49
110001
Max - 7dB
32dB
48
110000
Max - 7.5dB
47
101111
Max - 8dB
46
101110
Max - 8dB
45
101101
Max - 9dB
44
101100
Max - 9dB
:
:
:
5
000101
Max - 29dB
4
000100
Max - 29dB
3
000011
Max - 30dB
2
000010
Max - 30dB
1
000001
Max - 30dB
0
000000
Max - 30dB
B2
B5
POWER SUPPLY
ON
POWER
3-WIRE SERIAL INTERFACE AVAILABLE
SHDN
SHUTDOWN
RXENA
RECEIVER ON
(DRIVES RF T/R SWITCH)
TRANSMITTER ON
(DRIVES RF T/R SWITCH AND PA ON/OFF)
TXENA
MAC SPI
CS
SCLK
DIN
MAX2828/MAX2829
MAC
XTAL-OSC
CS (SELECT)
SCLK (CLOCK)
DIN (DATA)
SPI:
PROGRAM 2.4GHz OR 5GHz MODE, CHANNEL FREQUENCY, PA BIAS,
TRANSMITTER LINEARITY, RECEIVER RSSI OPERATION, CALIBRATION MODE, ETC.
PABIAS
PA BIAS D/A
(DRIVES POWER RAMP CONTROL)
SHUTDOWN
MODE
STANDBY
MODE
0 TO 7µs
RECEIVE
MODE
PA ENABLE
TRANSMIT
MODE
Figure 1. System Timing Diagram
14
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
D13
DIN
D12
D0
A3
A2
A1
A0
SCLK
tDH
tDS
tCH
tCL
tCS1
CS
tCSO
tCSH
tCSS
tCSW
t
Figure 2. 3-Wire Serial-Interface Timing Diagram
Typical Operating Characteristics
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11g
TA = +85°C
130
140
120
TA = +25°C
135
ICC (mA)
125
130
125
115
TA = -40°C
TA = +25°C
125
120
120
110
115
115
TA = -40°C
105
110
100
110
105
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
VCC (V)
VCC (V)
POUT (dBm)
NOISE FIGURE
vs. BASEBAND GAIN SETTINGS
RX VOLTAGE GAIN
vs. BASEBAND GAIN SETTINGS
RX IN-BAND OUTPUT P-1dB
vs. GAIN
80
25
LNA = MEDIUM GAIN
20
15
GAIN (dB)
70
LNA = MEDIUM GAIN
60
50
40
30
10
LNA = HIGH GAIN
5
20
-15
-10
-5
LNA MEDIUM-/HIGH-GAIN
SWITCH POINT
2
0
1
0
-1
-2
LNA LOW-/MEDIUMGAIN SWITCH POINT
-4
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
GAIN SETTINGS
GAIN SETTINGS
Maxim Integrated
-20
3
-3
0
-25
4
LNA = LOW GAIN
10
0
-30
MAX2828/9 toc06
30
LNA = HIGH GAIN
OUTPUT P-1dB (dBVRMS)
LNA = LOW GAIN
90
-35
MAX2828/9 toc05
35
100
MAX2828/9 toc04
40
NF (dB)
TA = +85°C
145
ICC (mA)
ICC (mA)
130
150
TX ICC vs. POUT
135
MAX2828/9 toc02
MAX2828/9 toc01
135
TX ICC vs. VCC
155
MAX2828/9 toc03
RX ICC vs. VCC
140
25
35
45
55
65
75
85
95
GAIN (dB)
15
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Typical Operating Characteristics (continued)
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11g
-50
-60
fOFFSET = 40MHz
-70
2.0
LNA = MEDIUM GAIN
1.5
1.0
-110
-140
1GHz
0
-10
-120 -100
-40
-20
0
20
RX I/Q DC OFFSET SETTLING RESPONSE
(-16dB BB VGA GAIN STEP)
3V
2V
3V
2V
1V
1V
1V
0
0
0
6mV
6mV
6mV
4mV
4mV
4mV
2mV
2mV
2mV
0
0
0
RX I/Q DC OFFSET SETTLING RESPONSE
(-32dB BB VGA GAIN STEP)
RX EVM vs. PIN
0
6mV
4mV
2mV
0
400ns/div
RX EVM vs. VOUT
3.0
LNA = HIGH GAIN
LNA = LOW GAIN
PIN = -50dBm
2.5
2.0
EVM (%)
EVM (%)
1V
12
11
10
9
8
7
6
5
4
3
2
1
0
MAX2828/9 toc14
MMAX2828/9 toc13
2V
400ns/div
20ns/div
MAX2828/9 toc15
20ns/div
3V
7GHz
MAX2828/9 toc12
RX I/Q DC OFFSET SETTLING RESPONSE
(+8dB BB VGA GAIN STEP)
MAX2828/9 toc10
2V
-60
PIN (dBm)
RX I/Q DC OFFSET SETTLING RESPONSE
(-8dB BB VGA GAIN STEP)
3V
-80
MAX2828/9 toc11
-30
-120
LNA = LOW GAIN
-130
fOFFSET = 100MHz
-70
-50
PJAMMER (dBm)
-90
-100
0.5
-90
-80
(dBm)
fOFFSET = 25MHz
MAX2828/9 toc09
LNA = HIGH GAIN
2.5
fOFFSET = 20MHz
-110
LNA = MEDIUM GAIN
1.5
1.0
0.5
0
-80
-70
-60
-50
-40
-30
PIN (dBm)
16
-40
MAX2828/9 toc08
PIN = -62dBm
RX EMISSION SPECTRUM, LNA INPUT
(TX OFF, LNA = LOW GAIN)
RX RSSI OUTPUT vs. INPUT POWER
3.0
MAX2828/9 toc07
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSSI OUTPUT (V)
EVM (%)
OFDM EVM WITH OFDM JAMMER vs. OFDM JAMMER
LEVEL WITH JAMMER OFFSET FREQUENCY
-20
-10
0
-29 -27 -25 -23 -21 -19 -17 -15 -13 -11 -9
VOUT (dBVRMS)
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Typical Operating Characteristics (continued)
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11g
TA = -40°C
0
TA = -40°C
0
-3
TA = +25°C
-2
-3
TA = +85°C
2.40
2.42
2.44
VCC (V)
-90
f = 6.4GHz
-70
RF LO (GHz)
POUT (dBm)
f = 2.56GHz
-15
-20
-25
-80
-30
-90
-100
1MHz
-35
0
26.5GHz
56
40
30
20
-90
10
(kHz)
-80
-100
-10
-120
-20
-130
-30
-140
-40
-50
-150
1M
FREQUENCY OFFSET (Hz)
Maxim Integrated
10M
TX-RX TURNAROUND
FREQUENCY SETTLING
25kHz
5kHz/div
0
-110
100k
0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
VTUNE (V)
64
MAX2828/9 toc23
-70
24 32 40 48
GAIN SETTINGS
50
MAX2828/9 toc22
-60
16
CHANNEL-SWITCHING FREQUENCY SETTLING
(2500MHz TO 2400MHz)
CLOSED-LOOP PHASE NOISE
-50
8
2.60
2.58
2.56
2.54
2.52
2.50
2.48
2.46
2.44
2.42
2.40
2.38
2.36
2.34
2.32
2.30
MAX2828/9 toc21
-5
-10
-50
10k
2.477GHz
LO FREQUENCY
vs. VTUNE
0
f = 2.48GHz
1k
2.397GHz
2.50
MAX2828/9 toc24
-20
-60
2.48
MAX2828/9 toc20
f = 2.4GHz
-40
2.46
TX OUTPUT POWER
vs. GAIN SETTINGS
MAX2828/9 toc19
0
-30
-60
-70
FREQUENCY (GHz)
TX OUTPUT SPECTRUM
-10
-50
-100
-6
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
-40
-80
TA = +85°C
-5
-6
B6:B1 = 110101
-30
-4
-5
B6:B1 = 111011
-20
(dBm/100kHz)
TA = +25°C
-2
-4
(dBm)
-10
-1
POUT (dBm)
POUT (dBm)
-1
(dBm)
MAX2828/9 toc17
1
MAX2828/9 toc16
1
TX OUTPUT SPECTRUM
(54Mbps OFDM SIGNAL)
TX OUTPUT POWER vs. FREQUENCY
(B6:B1 = 111111)
MAX2828/9 toc18
TX OUTPUT POWER vs. VCC
(B6:B1 = 111111)
-25kHz
0
250
TIME (µs)
0
50
TIME (µs)
17
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Typical Operating Characteristics (continued)
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11g
1.95
1.90
115
EVM (%)
1.85
RX GAIN IMBALANCE
MEAN = -826µV
DEV = 1.75mV
SAMPLE SIZE = 2270
192
160
92
128
69
96
46
64
23
32
MAX2828/9 toc27
MAX2828/9 toc25
138
MAX2828/9 toc26
RX STATIC DC OFFSET
TX EVM vs. POUT
2.00
MEAN = 0.044dB
DEV = 0.08dB
SAMPLE SIZE = 2221
1.80
1.75
1.70
1.65
1.60
1.55
1.50
0
-25
-20 -15 -10
POUT (dBm)
-5
0
0
1σ/div
1σ/div
160
TX LO LEAKAGE
MAX2828/9 toc28
RX PHASE IMBALANCE
192
MEAN = 90.2°
DEV = 0.63°
SAMPLE SIZE = 2221
108
90
128
72
96
54
64
36
32
18
0
1σ/div
802.11g TX POUT AT 2.4GHz
MAX2828/9 toc30
TX SIDEBAND SUPPRESSION
120
MEAN = -46.1dBc
DEV = 4.94dB
SAMPLE SIZE = 2196
102
85
96
68
72
51
48
34
24
17
MEAN = -3.32dB
DEV = 0.518dB
SAMPLE SIZE = 2196
0
0
1σ/div
18
MEAN = -29.5dBc
DEV = 5.23dB
SAMPLE SIZE = 2196
0
1σ/div
144
MAX2828/9 toc29
-30
MAX2828/9 toc31
-35
1σ/div
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Typical Operating Characteristics (continued)
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11a
TA = +85°C
150
135
TA = +25°C
TA = +85°C
130
TA = +25°C
TA = -40°C
TA = -40°C
115
-35
-15
-10
-5
POUT (dBm)
NOISE FIGURE
vs. BASEBAND GAIN SETTINGS
NOISE FIGURE vs. FREQUENCY
RX VOLTAGE GAIN
vs. BASEBAND GAIN SETTING
35
NF (dB)
LNA = MEDIUM
25
30
GAIN = 15dB, B7:B6 = 0X
25
GAIN = 45dB, B7:B6 = 10
80
20
15
5.25GHz
LNA = HIGH
0
LNA = MEDIUM GAIN
60
40
15
5.85GHz
LNA = HIGH GAIN
100
GAIN (dB)
5.85GHz
120
MAX2828/9 toc36
5.25GHz
40
MAX2828/9 toc35
LNA = LOW
20
GAIN = 50dB, B7:B6 = 11
10
LNA = LOW GAIN
20
5
0
GAIN > 65dB, B7:B6 = 11
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
FREQUENCY (GHz)
GAIN SETTINGS
GAIN SETTINGS
RX VOLTAGE GAIN VARIATION
vs. FREQUENCY
0
-2
LNA = HIGH GAIN
-4
LNA MEDIUM-/HIGH-GAIN
SWITCH POINT
1
0
-1
4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9
FREQUENCY (MHz)
Maxim Integrated
2.0
LNA = MEDIUM GAIN
1.5
1.0
-2
0.5
-3
LNA = LOW GAIN
-4
-6
LNA = HIGH GAIN
2.5
RSSI OUTPUT (V)
LNA = LOW GAIN
3
2
RX RSSI OUTPUT vs. INPUT POWER
3.0
MAX2828/9 toc39
LNA = MEDIUM GAIN
4
OUTPUT P-1dB (dBVRMS)
4
RX IN-BAND OUTPUT P-1dB
vs. GAIN
MAX2828/9 toc38
6
0
4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9
MAX2828/9 toc40
5
GAIN VARIATION (dB)
-20
VCC (V)
35
2
-25
VCC (V)
40
10
-30
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
MAX2828/9 toc37
100
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
50
NF (dB)
120
110
110
30
130
125
120
120
45
ICC (mA)
140
130
140
140
ICC (mA)
ICC (mA)
150
145
MAX2828/9 toc33
160
MAX2828/9 toc32
160
TX ICC vs. POUT
TX ICC vs. VCC
170
MAX2828/9 toc34
RX ICC vs. VCC
0
25
35
45
55
65
GAIN (dB)
75
85
95
-110
-90
-70
-50
-30
-10
10
PIN (dBm)
19
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Typical Operating Characteristics (continued)
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11a
3V
2V
-65
1V
1V
-70
0
0
-75
6mV
6mV
-80
4mV
4mV
-85
2mV
2mV
0
0
-90
1GHz
RX I/Q DC OFFSET SETTLING RESPONSE
(-32dB BB VGA GAIN STEP)
MAX2828/9 toc44
RX I/Q DC OFFSET SETTLING RESPONSE
(-16dB BB VGA GAIN STEP)
3V
20ns/div
20ns/div
14GHz
RX EVM vs. PIN
16
MAX2828/9 toc45
3V
LNA = HIGH GAIN
LNA = MEDIUM GAIN
14
2V
2V
12
1V
1V
10
0
0
6mV
6mV
6
4mV
4mV
4
2mV
2mV
2
0
0
EVM (%)
(dBm)
3V
2V
-60
MAX2828/9 toc43
f = 8.3GHz
MAX2828/9 toc46
f = 4.1GHz
MAX2828/9 toc41
-55
MAX2828/9 toc42
RX EMISSION SPECTRUM, LNA INPUT
(TX OFF, LNA = LOW GAIN)
-50
RX I/Q DC OFFSET SETTLING RESPONSE
(-8dB BB VGA GAIN STEP)
RX I/Q DC OFFSET SETTLING RESPONSE
(+8dB BB VGA GAIN STEP)
8
LNA = LOW GAIN
0
400ns/div
400ns/div
-80
-70
-60
-50
-40
-30
-20
-10
0
PIN (dBm)
PIN = -50dBm
-3
TA = -40°C
2.0
-5
-6
TA = +25°C
TA = +85°C
-7
1.0
-9
0
-6
-8
TA = +85°C
-10
-8
0.5
TA = -40°C
-4
POUT (dBm)
2.5
1.5
20
TA = +25°C
-2
-4
POUT (dBm)
EVM (%)
3.0
-0
MAX2828/9 toc48
3.5
-2
MAX2828/9 toc47
4.0
TX OUTPUT POWER vs. FREQUENCY
(B6:B1 = 111111)
MAX2828/9 toc49
TX OUTPUT POWER vs. VCC
(B6:B1 = 111111)
RX EVM vs. VOUT
-12
-29 -27 -25 -23 -21 -19 -17 -15 -13 -11 -9
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9
POUT (dBVRMS)
VCC (V)
FREQUENCY (GHz)
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Typical Operating Characteristics (continued)
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11a
TX OUTPUT SPECTRUM
(54Mbps OFDM SIGNAL)
-50
-40
-60
-80
-70
-90
-80
-100
-90
-110
5.21GHz
f = 7.2GHz
-50
-70
f = 8.2GHz
-50
-60
-70
5400
D10:D9 = 11
10
01
0
00
5200
5000
20
-90
10
-100
-10
-20
-30
4600
-140
-40
4400
-150
-50
1k
10k
100k
1M
10M
0
250
VTUNE (V)
FREQUENCY OFFSET (Hz)
TIME (µs)
CHANNEL-SWITCHING FREQUENCY SETTLING
(5.875GHz TO 4.9GHz)
TX-RX TURNAROUND
FREQUENCY SETTLING
TX EVM
vs. POUT
2.4
MAX2828/9 toc58
25kHz
MAX2828/9 toc57
MAX2828/9 toc56
30
64
0
-110
-130
40
56
30
-120
50
2.3
2.2
20
10
5kHz/div
EVM (%)
(kHz)
24 32 40 48
GAIN SETTINGS
40
-80
0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2
16
50
4800
LOW-BAND VCO
8
CHANNEL-SWITCHING FREQUENCY SETTLING
(5.35GHz TO 5.15GHz)
(kHz)
5600
(dBm)
LO FREQUENCY (MHz)
5800
-25
-40
MAX2828/9 toc54
00
01
-20
26.5GHz
CLOSED-LOOP PHASE NOISE
MAX2828/29 toc53
HIGH-BAND VCO
10
D10:D9 = 11
6000
-15
-35
LO FREQUENCY vs. VTUNE
6200
-10
-30
-100
1MHz
5.29GHz
-5
MAX2828/9 toc55
-30
f = 6.2GHz
MAX2828/9 toc52
-20
(dBm)
(dBm/100kHz)
-10
-40
-60
f = 5.2GHz
POUT (dBm)
B6:B1 = 111100
-30
0
MAX2828/9 toc51
-20
0
MAX2828/9 toc50
-10
TX OUTPUT POWER
vs. GAIN SETTINGS
TX OUTPUT SPECTRUM
0
2.1
2.0
-10
1.9
-20
-30
1.8
-40
1.7
-25kHz
-50
0
250
TIME (µs)
Maxim Integrated
0
50
TIME (µs)
-35
-30
-25
-20 -15 -10
POUT (dBm)
-5
0
21
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Typical Operating Characteristics (continued)
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11a
155
MEAN = -0.007dB
DEV = 0.08dB
SAMPLE SIZE = 2268
240
200
92
124
160
69
93
120
46
62
80
23
31
40
0
96
80
MEAN = -47.9dBc
DEV = 3.3dB
SAMPLE SIZE = 2237
MAX2828/9 toc63
MEAN = -29.5dBc
DEV = 5.24dB
SAMPLE SIZE = 2236
802.11a TX POUT AT 5.25GHz
TX SIDEBAND SUPPRESSION
MAX2828/9 toc62
80
1σ/div
1σ/div
TX LO LEAKAGE
102
85
64
64
68
48
48
51
32
32
34
16
16
17
0
MEAN = -2.8dB
DEV = 0.68dB
SAMPLE SIZE = 2237
0
0
1σ/div
MEAN = 90.3°
DEV = 0.55°
SAMPLE SIZE = 2268
0
0
1σ/div
96
MAX2828/9 toc61
186
MAX2828/9 toc60
115
MEAN = -826µV
DEV = 1.75mV
SAMPLE SIZE = 2270
RX PHASE IMBALANCE
RX GAIN IMBALANCE
MAX2828/9 toc59
138
4MAX2828/9 toc64
RX STATIC DC OFFSET
1σ/div
1σ/div
802.11g/802.11a
RX RSSI STEP RESPONSE
(-40dB SIGNAL STEP)
MAX2828/9 toc66
MAX2828/9 toc65
RX RSSI STEP RESPONSE
(+40dB SIGNAL STEP)
2V
MAX2828/9 toc67
I/Q OUTPUT DC ERROR DROOP
(RXHP = 1–0; A3:A1 = 1000, D2 = 0)
2V
1.5V
1.5V
1V
1V
0.5V
0.5V
0
0
20mV/div
20ms/div
22
200ns/div
200ns/div
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Typical Operating Characteristics (continued)
(VCC = 2.7V, fRF = 2.437GHz (802.11g) or fRF = 5.25GHz (802.11a), fREFOSC = 40MHz, SHDN = CS = high, RXHP = SCLK = DIN =
low, RBIAS = 11kΩ, TA = +25°C using the MAX2828/MAX2829 evaluation kits.)
802.11g/802.11a
RX BB VGA SETTLING RESPONSE
(+8dB GAIN STEP)
4V
4V
2V
4V
2V
2V
0
0
0
0.8V
2V
0.3V
0.6V
1.5V
0.2V
0.4V
1V
0.1V
0.2V
0.5V
RX BB FREQUENCY RESPONSE
vs. COARSE SETTING (FINE SETTING = 010)
0
(dB)
30
MAX2828/9 toc72
15
0
2V
RX BB FREQUENCY RESPONSE
vs. FINE SETTING (COARSE SETTING = 9.5MHz)
15
0
-15
-15
-30
-30
-45
-45
(dB)
2V
40ns/div
30
MAX2828/9 toc71
4V
40ns/div
-60
-60
1.5V
-75
1V
-90
-90
-105
-105
-120
-135
-120
-135
1MHz
0.5V
0
40
GROUP DELAY RIPPLE (ns)
-10
-20
-30
-40
-50
-60
-70
MAX2828/9 toc75
50
MAX2828/9 toc74
0
70MHz
GROUP DELAY RIPPLE
vs. FREQUENCY (COARSE SETTING = 9.5MHz)
TX BASEBAND FREQUENCY RESPONSE
10
-75
1MHz
40ns/div
MAX2828/9 toc73
RX BB VGA SETTLING RESPONSE
(-32dB GAIN STEP)
EVM (%)
0
0
40ns/div
70MHz
RX I/Q COMMON-MODE VOLTAGE SPREAD
96
80
MEAN = 917mV
DEV = 17.2mV
SAMPLE SIZE = 2270
MAX2828/9 toc76
0
MAX2828/9 toc70
MAX2828/9 toc69
MAX2828/9 toc68
6V
RX BB VGA SETTLING RESPONSE
(-16dB GAIN STEP)
RX BB VGA SETTLING RESPONSE
(-8dB GAIN STEP)
64
30
48
20
32
10
16
-80
-90
0
1
10
POUT (dBm)
Maxim Integrated
100
0
1
2
3
4
5
6
7
8
9
10 11
1σ/div
FREQUENCY (MHz)
23
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Block Diagrams/Typical Operating Circuits
B6
VCC
B7
Rx FRONT-END GAIN-CONTROL BIT
FROM BASEBAND IC
N.C.
GND
1.8nH
0.5pF
5GHz Rx RF OUTPUT FROM
SWITCH AND BPF
2nH
RXRFH
0.5pF GND
55
54
53
52
51
50
49
48
47
46
45
RXBBQ-
RXBBI-
RXBBI+
VCC
B1
VCC
B2
GND
VCC
B3
B4
VCC
B5
56
Rx FRONT-END AND Tx BASEBAND
GAIN-CONTROL BIT FROM
BASEBAND IC
RXBBQ+
Rx ANALOG OUTPUT
TO BASEBAND IC
Rx/Tx BASEBAND-CONTROL BITS FROM
BASEBAND IC
44
43
42
1
MUX
2
MUX
41
MAX2828
3
40
39
RSSI
4
5
38
6
37
0°
7
36
RXHP
RXENA
RSSI
SHDN
CONTROL BIT FROM
BASEBAND IC
MODE-CONTROL
LOGIC SIGNAL FROM
BASEBAND IC
RSSI OUTPUT
MODE-CONTROL
LOGIC SIGNAL FROM
BASEBAND IC
VCC
BYPASS
TUNE
C1
150pF
1.2pF
5GHz Tx RF OUTPUT
TO BPF AND PA
TXRFH+
1.2pF
TXRFH-
VCC
8
35
90°
9
34
10
33
32
N.C. 11
SERIAL
INTERFACE
14
29
Tx ANALOG INPUT
SIGNAL FROM
BASEBAND IC
24
24
25
26
27
GND
10nF
CPOUT
C2
560pF
GND
VCC
ROSC
REFERENCE
OSCILLATOR INPUT
LD
LOCK-DETECT OUTPUT
TO BASEBAND IC
28
CS
23
SCLK
22
DIN
21
VCC
20
GND
19
VREF
18
VCC
17
RBIAS
16
VCC
VCC
15
TXBBQ-
PABIAS
30
TXBBQ+
PA BIAS CURRENT
TO PA
31
13
TXBBI-
TXENA
TXBBI+
MODE-CONTROL
LOGIC SIGNAL FROM
BASEBAND IC
620Ω
300Ω
PLL
N.C. 12
GND
SERIAL INPUT FROM
BASEBAND IC
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Block Diagrams/Typical Operating Circuits (continued)
B6
VCC
55
54
53
52
51
50
49
48
47
46
45
RXBBQ-
RXBBI-
RXBBI+
VCC
B1
VCC
B2
GND
VCC
B3
B4
VCC
B5
56
Rx FRONT-END AND Tx BASEBAND
GAIN-CONTROL BIT FROM
BASEBAND IC
RXBBQ+
Rx ANALOG OUTPUT
TO BASEBAND IC
Rx/Tx BASEBAND-CONTROL BITS FROM
BASEBAND IC
44
43
42
1
MUX
MUX
2
41
RXHP
RXENA
MAX2829
B7
Rx FRONT-END GAIN-CONTROL BIT
FROM BASEBAND IC
RSSI
MODE-CONTROL
LOGIC SIGNAL FROM
BASEBAND IC
RSSI OUTPUT
RSSI
8.2pF
2.40GHz Rx RF OUTPUT FROM
SWITCH AND BPF
40
3
CONTROL BIT FROM
BASEBAND IC
3.6nH
RXRFL
39
4
SHDN
1pF
GND
1.8nH
0.5pF
5GHz Rx RF OUTPUT FROM
SWITCH AND BPF
RXRFH
5
38
0°
37
6
MODE-CONTROL
LOGIC SIGNAL FROM
BASEBAND IC
VCC
BYPASS
90°
2nH
0.5pF GND
0°
7
1.2pF
5GHz Tx RF OUTPUT
TO BPF AND PA
TXRFH+
1.2pF
TXRFH-
VCC
36
÷2
8
35
90°
TUNE
C1
150pF
GND
300Ω
PLL
9
34
10
33
GND
10nF
CPOUT
C2
560pF
1.8pF
2.4GHz TX RF OUTPUT
TO BPF AND PA
TXRFL+
620Ω
32
11
GND
6.8nH
30
29
14
Tx ANALOG INPUT
SIGNAL FROM
BASEBAND IC
26
27
VCC
ROSC
REFERENCE
OSCILLATOR INPUT
LD
LOCK-DETECT OUTPUT
TO BASEBAND IC
28
CS
25
SCLK
24
DIN
23
VCC
22
GND
21
VREF
20
VCC
19
RBIAS
18
VCC
17
TXBBQ-
16
TXBBQ+
VCC
15
Maxim Integrated
31
TXENA 13
PABIAS
PA BIAS CURRENT
TO PA
12
TXBBI-
MODE-CONTROL LOGIC
SIGNAL FROM BASEBAND IC
SERIAL
INTERFACE
TXBBI+
1.8pF
TXRFL-
SERIAL INPUT FROM
BASEBAND IC
25
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Pin Description
PIN
NAME
MAX2828
MAX2829
1
1
B6
2
2
VCC
FUNCTION
Rx Front-End and Tx Gain-Control Digital Input Bit 6
2.4GHz/5GHz LNA Supply Voltage. Bypass with a capacitor as close to the pin as
possible. Do not share the bypass-capacitor ground vias with any other branches.
3
3
B7
4, 11, 12
—
N.C.
No Connection. Leave unconnected.
5
5
GND
LNA Ground. Make connections to ground vias as short as possible. Do not share ground
vias with any of the other branches.
6
6
RXRFH
7
7
GND
8
8
TXRFH+
9
9
TXRFH-
10
10
VCC
13
13
TXENA
Tx Mode Enable Digital Input. Set high to enable Tx (see Figure 1).
14
14
PABIAS
DAC Current Output. Connect directly to the external PA bias pin.
15
15
VCC
16
16
TXBBI+
17
17
TXBBI-
18
18
TXBBQ+
19
19
TXBBQ-
20
20
VCC
Tx Upconverter Supply Voltage. Bypass with a capacitor as close to the pin as possible.
Do not share the bypass-capacitor ground vias with any other branches.
21
21
RBIAS
This Analog Voltage Input is Internally Biased to a Bandgap Voltage. Connect an external
precision 11kΩ resistor or current source between this pin and ground to set the bias
current for the device.
22
22
VCC
Reference Circuit Supply Voltage. Bypass with a capacitor as close to the pin as possible.
Do not share the bypass-capacitor ground vias with any other branches.
23
23
VREF
Reference Voltage Output
26
Rx Front-End Gain-Control Digital Input Bit 7
5GHz Single-Ended LNA Input. Requires AC-coupling and external matching network.
LNA Ground. Make connections to ground vias as short as possible. Do not share ground
vias with any other branches.
5GHz Tx PA Driver Differential Outputs. Requires AC-coupling and external matching
network (and balun) to the external PA input.
Tx RF Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not
share the bypass-capacitor ground vias with any other branches.
Tx Baseband Filter Supply Voltage. Bypass with a capacitor as close to the pin as
possible. Do not share the bypass-capacitor ground vias with any other branches.
Tx Baseband I-Channel Differential Inputs
Tx Baseband Q-Channel Differential Inputs
24
24
GND
Digital Circuit Ground. Make connections to ground vias as short as possible. Do not
share ground vias with any other branches.
25
25
VCC
Digital Circuit Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do
not share the bypass-capacitor ground vias with any other branches.
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Pin Description (continued)
PIN
NAME
FUNCTION
MAX2828
MAX2829
26
26
DIN
Data Digital Input of 3-Wire Serial Interface (See Figure 2)
27
27
SCLK
Clock Digital Input of 3-Wire Serial Interface (See Figure 2)
28
28
CS
Active-Low Enable Digital Input of 3-Wire Serial Interface (See Figure 2)
Lock-Detect Digital Output of Frequency Synthesizer. Output high indicates that the
frequency synthesizer is locked.
29
29
LD
30
30
ROSC
Reference Oscillator Input. Connect an external reference oscillator to this analog input.
31
31
VCC
PLL Charge-Pump Supply Voltage. Bypass with a capacitor as close to the pin as
possible. Do not share the bypass-capacitor ground vias with any other branches.
32
32
GND
Charge-Pump Circuit Ground. Make connections to ground vias as short as possible. Do
not share ground vias with any other branches.
33
33
CPOUT
Charge-Pump Output. Connect the frequency synthesizer’s loop filter between CPOUT
and TUNE. Keep the line from this pin to the tune input as short as possible to prevent
spurious pickup. Connect C2 as close to CPOUT as possible. Do not share the capacitor
ground vias with any other branches (see the Typical Operating Circuit).
34
34
GND
Ground. Make connections to ground vias as short as possible. Do not share ground vias
with any other branches.
35
35
GND
VCO Ground. Make connections to ground vias as short as possible. Do not share ground
vias with any other branches.
36
36
TUNE
VCO TUNE Input. Connect C1 as close to TUNE as possible. Connect the ground of C1 to
VCO ground. Do not share the capacitor ground vias with any other branches (see the
Typical Operating Circuit).
37
37
BYPASS
Bypass with a 0.1µF Capacitor to GND. The capacitor is used by the on-chip VCO voltage
regulator.
38
38
VCC
39
39
SHDN
40
40
RSSI
41
41
RXENA
42
42
RXHP
43
43
RXBBQ-
44
44
RXBBQ+
45
45
RXBBI-
46
46
RXBBI+
47
47
VCC
48
48
B1
49
49
VCC
Maxim Integrated
VCO Supply Voltage. Bypass to system ground as close as possible to the pin with
capacitors. Do not share the ground vias for the bypass capacitors with any other
branches.
Active-Low Shutdown Digital Input. Set high to enable the device.
RSSI or Temperature-Sensor Multiplexed Output
Rx Mode Enable Digital Input. Set high to enable Rx.
Rx Baseband AC-Coupling Highpass Corner Frequency Control Digital Input Selection Bit
Rx Baseband Q-Channel Differential Outputs. In Tx calibration mode, these pins are the
LO leakage and sideband-detector outputs.
Rx Baseband I-Channel Differential Outputs. In Tx calibration mode, these pins are the LO
leakage and sideband-detector outputs.
Rx Baseband Buffer Supply Voltage. Bypass with a capacitor as close to the pin as
possible. Do not share the bypass-capacitor ground vias with any other branches.
Rx/Tx Gain-Control Digital Input Bit 1
Rx Baseband Filter Supply Voltage. Bypass with a capacitor as close to the pin as
possible. Do not share the bypass-capacitor ground vias with any other branches.
27
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Pin Description (continued)
PIN
NAME
FUNCTION
MAX2828
MAX2829
50
50
B2
51
51
GND
Rx IF Ground. Make connections to ground vias as short as possible. Do not share
ground vias with any other branches.
52
52
VCC
Rx IF Supply Voltage. Bypass with a capacitor as close to the pin as possible. Do not
share the bypass-capacitor ground vias with any other branches.
53
53
B3
Rx/Tx Gain-Control Digital Input Bit 3
54
54
B4
Rx/Tx Gain-Control Digital Input Bit 4
55
55
VCC
56
56
B5
—
4
RXRFL
2.4GHz Single-Ended LNA Input. Requires AC-coupling and external matching network.
—
11
TXRFL+
—
12
TXRFL-
2.4GHz Tx PA Driver Differential Outputs. Requires AC-coupling and external matching
network (and balun) to the external PA input.
EP
EP
EXPOSED
PADDLE
Rx/Tx Gain-Control Digital Input Bit 2
Rx Downconverter Supply Voltage. Bypass with a capacitor as close to the pin as
possible. Do not share the bypass-capacitor ground vias with any other branches.
Rx/Tx Gain-Control Digital Input Bit 5
Exposed Paddle. Connect to the ground plane with multiple vias for proper operation and
heat dissipation.
Table 5. Mode Table
MODE
Detailed Description
LOGIC PINS
SHDN TXENA
RXENA
REGISTER
SETTINGS
X
SPI™ Reset
0
1
1
Shutdown
0
0
0
X
Standby
1
0
0
X
Rx
1
0
1
X
Tx
1
1
0
X
Tx Calibration
1
1
0
Calibration
register D1 = 1
Rx Calibration
1
0
1
Calibration
register D0 = 1
The MAX2828/MAX2829 single-chip, RF transceiver ICs
are designed for WLAN applications. The MAX2828 is
designed for 5GHz 802.11a (OFDM), and the MAX2829
is designed for dual-band 2.4GHz 802.11b/g and 5GHz
802.11a. The ICs include all circuitry required to implement the RF transceiver function, fully integrating the
receive path, transmit path, VCO, frequency synthesizer, and baseband/control interface.
Modes of Operation
The MAX2828/MAX2829 have seven primary modes of
operation: shutdown, SPI reset, standby, transmit,
receive, transmitter calibration, and receiver calibration
(see Table 5).
X = Don’t care or do not apply.
SPI is a trademark of Motorola, Inc.
28
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Shutdown Mode
Shutdown mode is achieved by driving SHDN low. In
shutdown mode, all circuit blocks are powered down,
except for the serial interface. While the device is in
shutdown, the values of the serial interface registers
are maintained and can be changed as long as VCC
(pin 25) is applied.
SPI Reset
By driving RXENA and TXENA high while setting SHDN
low, all circuit blocks are powered down, as in shutdown mode. However, in SPI reset mode, all registers
are returned to their default states. It is recommended
to reset the SPI and all registers at the start of power-up
to ensure that the registers are set to the correct values
(see Table 9).
Standby Mode
To place the device in standby mode, set SHDN high
and RXENA and TXENA low. This mode is mainly used
to enable the frequency synthesizer block while the rest
of the device is powered down. In this mode, various
blocks in the system can be selectively turned on or off
according to the standby register table (Table 10).
Receive (Rx) Mode
To place the device in Rx mode, set RXENA high. All
receiver blocks are enabled in this mode.
Transmit (Tx) Mode
To place the device in Tx mode, set TXENA high. All
transmitter blocks are enabled in this mode.
Tx/Rx Calibration Mode
The MAX2828/MAX2829 feature Tx/Rx calibration
modes to detect I/Q imbalances and transmit LO leakage. In the Tx calibration mode, the LO leakage calibration is done only for the LO leakage signal that is
present at the center frequency of the channel (i.e., in
the middle of the OFDM or QPSK spectrum). The LO
leakage calibration includes the effect of all DC offsets
in the entire baseband paths of the I/Q modulator, and
also includes direct leakage of the LO to the I/Q modulator output.
During Tx LO leakage and I/Q imbalance calibration, a
sine and cosine signal (f = fTONE) is input to the baseband I/Q Tx pins from the baseband IC. At the LO leakage and sideband-detector output, the LO leakage
corresponds to the signal at fTONE and the sideband
suppression corresponds to the signal at 2 x fTONE.
The output power of these signals vary 2dB for 1dB of
variation in the LO leakage and unwanted sideband
levels. To calibrate the Tx path, first set the powerdetector gain to 8dB (Table 14). Adjust the DC offset of
the baseband inputs to minimize the signal at fTONE
(LO leakage). Then, adjust the baseband input relative
magnitude and phase offsets to reduce the signal at 2
x fTONE. If required, calibration can be done with higher
LO leakage and sideband-detector gain settings to
decrease LO leakage and increase image suppression.
After calibrating the transmitter, receiver calibration can
be done. In Rx calibration mode, the calibrated Tx RF
signal is internally routed to the Rx downconverter
inputs. In this loopback calibration mode, the voltage
regulator must be able to source 350mA total since
both Tx and Rx are turned on simultaneously.
RF Synthesizer Programming
in 5GHz Mode
In the 5GHz mode, the RF frequency synthesizer covers a 4.9GHz to 5.9GHz range. To achieve this large
tuning range while maintaining excellent noise performance, the 1GHz band is divided into sub-bands within
which the VCO is tuned. The selection of the appropriate VCO sub-band is done automatically by a finite
state machine (FSM). The PLL settling time is approximately 300µs for a change of 1GHz in the channel frequency. A faster PLL settling can be achieved by
overriding the FSM and manually programming the
VCO sub-band.
Automatic VCO Sub-Band Selection
By enabling this band-selection mode, only 1 bit needs
to be programmed to start the frequency acquisition.
The FSM will automatically stop after it selects the correct VCO sub-band, and after the PLL has locked.
The transmitter LO leakage and sideband-detector output is taken at the receiver I- or Q-channel output during this calibration phase.
Maxim Integrated
29
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 6. B1:B0 VCO Sub-Band
Assignments (Read Back Through LockDetect Pin)
B1
B0
0
0
Band 0 (lowest frequency band)
VCO FREQUENCY BAND
0
1
1
1
PROGRAMMED VCO
FREQUENCY BAND
D10
D9
Band 1
0
0
Band 0
0
Band 2
0
1
Band 1
1
Band 3 (highest frequency band)
1
0
Band 2
1
1
Band 3
The following steps should be followed:
1) Set D8 = 0 (A3:A0 = 0101) to enable the automatic
VCO sub-band selection by the FSM.
2) Enable the PLL and VCO if required. If required,
program the divider ratios corresponding to the
desired channel frequency.
3) Set D7 = 1 (A3:A0 = 0101) to start the FSM. The FSM
should only be started after PLL and VCO are
enabled, or after channel frequency is changed.
4) The VCO sub-band selection and PLL settling time
takes less than approximately 300µs. After the
band switching is completed and the PLL has
locked to the correct channel frequency, the FSM
stops automatically.
Every time the channel frequency is programmed or the
PLL+VCO is enabled, the FSM needs to be reset to be
used again for the next time. This reset operation does
not affect the PLL or VCO. To reset the FSM, set D7 = 0
(A3:A0 = 0101).
Every channel frequency maps to some VCO subband. Each VCO sub-band has a digital code, of which
the 2 LSBs (B1:B0) are readable. The B1:B0 code can
be read through pin LD by programming D3:D0 = 0111
(A3:A1 = 0000) for B1, or D3:D0 = 0110 (A3:A1 = 0000)
for B0 (see Table 6).
Manual VCO Sub-Band Selection
For faster settling, the VCO sub-band (B1:B0) can be
directly programmed through the SPI. First, the B1:B0
code for every channel frequency must be determined.
Once this is known, the B1:B0 code is directly programmed along with the PLL divider values, for the
given channel frequency. The PLL settling time in this
case is approximately 50µs.
Large temperature changes (>+50°C) may cause the
channel frequency to move into an adjacent sub-band.
To determine the correct sub-band, two on-chip comparators monitor the VCO control voltage (V TUNE ).
These comparator logic outputs can be read through
30
Table 7. D10:D9 VCO Sub-Band
Assignments (For Programming Through
SPI)
Table 8. Comparator-Output Definition
A3:A1 = 0000; A3:A1 = 0000;
D3:D0 = 0101 D3:D0 = 0100
RESPONSE
0
0
Program to a lower sub-band
if VCO is not in Band 0.
0
1
No change.
1
0
Program to a higher subband if VCO is not in Band 3.
1
1
Invalid state, does not occur.
the LD pin to decide whether the frequency sub-band
is correct or needs to be reprogrammed.
The following steps need to be followed to complete
manual PLL frequency acquisition and VCO sub-band
selection:
1) Set D8 = 1 (A3:A0 = 0101) to enable manual VCO
sub-band selection.
2) Enable the PLL and VCO if required. If required,
program the divider ratios corresponding to the
desired channel frequency.
3) Set D10:D9 (A3:A0 = 0101) to program the VCO
frequency sub-band according to Table 7. D10:D9
correspond to the same assignments as B1:B0.
After D10:D9 are programmed, 50µs is required to
allow the PLL to settle.
4) After 50µs of PLL settling time, the comparator outputs can be read through pin LD (see Table 8).
5) Based on the comparator outputs, the VCO frequency sub-band is programmed again according to
Table 8 until the frequency acquisition is achieved.
Large Temperature Changes
If the PLL and VCO are continuously active (i.e., no
reprogramming) and the die temperature changes by
50°C (as indicated by the on-chip temperature sensor),
there is a possibility that the PLL may get unlocked due
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 9. Register Default/SPI Reset Settings
DEFAULT
REGISTER
ADDRESS
TABLE
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
(A3:A0)
Register 0
0
1
0
0
0
1
0
1
0
0
0
0
0
0
0000
Register 1
0
0
0
0
0
0
1
1
0
0
1
0
1
0
0001
—
Standby
0
1
0
0
0
0
0
0
0
0
0
1
1
1
0010
10
Integer-Divider
Ratio
1
1
0
0
0
0
1
0
1
0
0
0
1
0
0011
11
FractionalDivider Ratio
0
1
1
1
0
1
1
1
0
1
1
1
0
1
0100
12
Band Select
and PLL
0
1
1
0
0
0
0
0
1
0
0
1
0
0
0101
13
—
Calibration
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0110
14
Lowpass Filter
0
0
0
0
0
0
0
0
1
0
1
0
1
0
0111
15
Rx
Control/RSSI
0
0
0
0
0
0
0
0
1
0
0
1
0
1
1000
16
Tx
Linearity/Baseband Gain
0
0
0
0
1
0
0
0
0
0
0
0
0
0
1001
17
PA Bias DAC
0
0
0
0
1
1
1
1
0
0
0
0
0
0
1010
18
Rx Gain
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1011
19
Tx VGA Gain
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1100
20
Table 10. Standby Register
(A3:A0 = 0010)
DATA BIT
DEFAULT
DESCRIPTION
D13
0
MIMO Select. Set to 0 for normal
operation. Set to 1 for MIMO
applications.
D12
1
Set to 1
D11
0
Voltage Reference (Pin 23)
D10
0
PA Bias DAC, in Tx Mode
D9
0
D8
0
D7
0
D6
0
D5
0
D4
0
D3
0
D2
1
D1
1
D0
1
Maxim Integrated
Set to 0
Set to 1
to the VCO drifting to an adjacent sub-band. In this
case, it is advisable to reprogram the PLL by either
manual or automatic sub-band selection.
Programmable Registers
The MAX2828/MAX2829 include 13 programmable, 18bit registers: 0, 1, standby, integer-divider ratio, fractional-divider ratio, band select and PLL, calibration,
lowpass filter, Rx control/RSSI, Tx linearity/baseband
gain, PA bias DAC, Rx gain, and Tx VGA gain. The 14
most significant bits (MSBs) are used for register data.
The 4 least significant bits (LSBs) of each register contain the register address. Data is shifted in MSB first.
The data sent to the devices, in 18-bit words, is framed
by CS. When CS is low, the clock is active and data is
shifted with the rising edge of the clock. When CS transitions high, the shift register is latched into the register
selected by the contents of the address bits. Only the
last 18 bits shifted into the device are retained in the
shift register. No check is made on the number of clock
pulses. For programming data words less than 14 bits
long, only the required data bits and the address bits
are required to be shifted, resulting in faster Rx and Tx
gain control where only the LSBs need to be pro-
31
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 11. Integer-Divider Ratio Register
(A3:A0 = 0011)
DATA BIT DEFAULT
D13
1
D12
1
D11
0
D10
0
D9
0
D8
0
D7
1
D6
0
D5
1
D4
0
D3
0
D2
0
D1
1
D0
0
DESCRIPTION
2 LSBs of the Fractional-Divider Ratio
Set to 0
Integer-Divider Ratio Word
Programming Bits. Valid values are
from 128 (D7:D0 = 10000000) to 255
(D7:D0 = 11111111).
grammed. The interface can be programmed through
the 3-wire SPI/MICROWIRE™-compatible serial port.
Standby Register Definition (A3:A0 = 0010)
Various internal blocks can be turned on or off using
the standby register (in standby mode, see Table 10).
Setting a bit to 1 turns the block on, while setting a bit
to 0 turns the block off.
Integer-Divider Ratio Register Definition
(A3:A0 = 0011)
This register contains the integer portion of the divider
ratio of the synthesizer. This register, in conjunction with
the fractional-divider ratio register, permits selection of a
precise frequency. The main synthesizer divide ratio is
an 8-bit value for the integer portion (see Table 11). Valid
values for this register are from 128 to 255 (D7–D0). The
default value is 210. D13 and D12 are reserved for the 2
LSBs of the fractional-divider ratio.
Fractional-Divider Ratio Register Definition
(A3:A0 = 0100)
This register (along with D13 and D12 of the integerdivider ratio register) controls the fractional-divider ratio
with 16-bit resolution. D13 to D0 of this register combined with D13 and D12 of the integer-divider ratio register form the whole fractional-divider ratio (see Tables
12a and 12b).
On startup, it is recommended to reset all registers by
placing the device in SPI reset mode (Table 5).
MICROWIRE is a trademark of National Semiconductor Corp.
Table 12a. IEEE 802.11g Frequency Plan and Divider Ratio Programming Words
fRF
(MHz)
(fRF x 4/3) / 20MHz
(DIVIDER RATIO)
INTEGER-DIVIDER
RATIO
FRACTIONAL-DIVIDER RATIO
A3:A0 = 0011, D7:D0
A3:A0 = 0100, D13:D0 (hex)
A3:A0 = 0011, D13:D12 (hex)
2412
160.8000
1010 0000
3333
00
2417
161.1333
1010 0001
0888
10
2422
161.4667
1010 0001
1DDD
11
2427
161.8000
1010 0001
3333
00
2432
162.1333
1010 0010
0888
10
2437
(default)
162.4667
1010 0010
1DDD
11
2442
162.8000
1010 0010
3333
00
2447
163.1333
1010 0011
0888
10
2452
163.4667
1010 0011
1DDD
11
2457
163.8000
1010 0011
3333
00
2462
164.1333
1010 0100
0888
10
2467
164.4667
1010 0100
1DDD
11
2472
164.8000
1010 0100
3333
00
2484
165.6000
1010 0101
2666
01
32
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 12b. IEEE 802.11a Frequency Plan and Divider Ratio Programming Words
fRF
(MHz)
(fRF X 4/5) / 20MHz
(DIVIDER RATIO)
INTEGER-DIVIDER
RATIO
FRACTIONAL-DIVIDER RATIO
A3:A0 = 0011, D7:D0
A3:A0 = 0100, D13:D0
(hex)
A3:A0 = 0011, D13:D12
(hex)
5180
207.2
1100 1111
0CCC
11
5200
208.0
1101 0000
0000
00
5220
208.8
1101 0000
3333
00
5240
209.6
1101 0001
2666
01
5260
210.4
1101 0010
1999
10
5280
211.2
1101 0011
0CCC
11
5300
212.0
1101 0100
0000
00
5320
212.8
1101 0100
3333
00
5500
220.0
1101 1100
0000
00
5520
220.8
1101 1100
3333
00
5540
221.6
1101 1101
2666
01
5560
222.4
1101 1110
1999
10
5580
223.2
1101 1111
0CCC
11
5600
224.0
1110 0000
0000
00
5620
224.8
1110 0000
3333
00
5640
225.6
1110 0001
2666
01
5660
226.4
1110 0010
1999
10
5680
227.2
1110 0011
0CCC
11
5700
228.0
1110 0100
0000
00
5745
229.8
1110 0101
3333
00
5765
230.6
1110 0110
2666
01
5785
231.4
1110 0111
1999
10
5805
232.2
1110 1000
0CCC
11
Maxim Integrated
33
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 13. Band-Select and PLL Register (A3:A0 = 0101)
DATA BIT
D13
DEFAULT
0
D12
1
D11
1
DESCRIPTION
Set to 0 for Normal Operation. Set to 1 for MIMO applications.
Set D12:D11 = 11
D10
0
D9
0
D8
0
D7
0
D6
0
RF Frequency Band Select in 802.11a Mode (D0 = 1). 0: 4.9GHz to 5.35GHz Band; 1: 5.47GHz to
5.875GHz Band.
D5
1
PLL Charge-Pump-Current Select. 0: 2mA; 1: 4mA.
D4
0
Set to 0
D3
0
D2
1
D1
0
D0
0
These Bits Set the VCO Sub-Band when Programmed Using the SPI (D8 = 1). D10:D9 = 00: lowest
frequency band; 11: highest frequency band.
VCO SPI Bandswitch Enable. 0: disable SPI control, bandswitch is done by FSM; 1: bandswitch is
done by SPI programming.
VCO Bandswitch Enable. 0: disable; 1: start automatic bandswitch.
These Bits Set the Reference-Divider Ratio. D3:D1 = 001 corresponds to R = 1 and 111
corresponds to R = 7.
RF Frequency Band Select. 0: 2.4GHz Band; 1: 5GHz band.
Band-Select and PLL Register Definition
(A3:A0 = 0101)
This register configures the programmable-reference
frequency dividers for the synthesizers, and sets the
DC current for the charge pump. The programmablereference frequency divider provides the reference frequencies to the phase detector by dividing the crystal
oscillator frequency (see Table 13).
Calibration Register Definition (A3:A0 = 0110)
This register configures the Rx/Tx calibration modes
(See Table 14).
34
Table 14. Calibration Register
(A3:A0 = 0110)
DATA BIT
D13
DEFAULT
0
DESCRIPTION
D12
1
D11
1
Transmitter I/Q Calibration LO
Leakage and Sideband-Detector
Gain-Control Bits. D12:D11 = 00:
8dB; 01: 18dB; 10: 24dB; 11: 34dB
D10
1
Set to 1
D9
0
D8
0
D7
0
D6
0
D5
0
D4
0
D3
0
D2
0
Set to 0
Set to 0
D1
0
0: Tx Calibration Mode Disabled; 1:
Tx Calibration Mode Enabled (Rx
outputs provide the LO leakage and
sideband-detector signal)
D0
0
0: RX Calibration Mode Disabled; 1:
Rx Calibration Mode Enabled
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 15. Lowpass-Filter Register (A3:A0 = 0111)
DATA BIT
DEFAULT
D13
0
D12
0
D11
0
D10
0
D9
0
D8
0
D7
0
D6
0
D5
1
D4
0
D3
1
D2
0
D1
1
D0
0
DESCRIPTION
Set to 0
RSSI High Bandwidth Enable. 0: 2MHz; 1: 6MHz
Set to 0
Tx LPF Corner Frequency Coarse Adjustment. D6:D5 = 00: undefined; 01: 12MHz (nominal mode); 10:
18MHz (turbo mode 1); 11: 24MHz (turbo mode 2).
Rx LPF Corner Frequency Coarse Adjustment. D4:D3 = 00: 7.5MHz; 01: 9.5MHz (nominal mode); 10:
14MHz (turbo mode 1); 11: 18MHz (turbo mode 2).
Rx LPF Corner Frequency Fine Adjustment (Relative to the Course Setting). D2:D0 = 000: 90%; 001:
95%; 010: 100%; 011: 105%; 100: 110%.
Lowpass Filter Register Definition (A3:A0 = 0111)
This register allows the adjustment of the Rx and Tx
lowpass filter corner frequencies (see Table 15).
Rx Control/RSSI Register Definition (A3:A0 = 1000)
This register allows the adjustment of the Rx section
and the RSSI output (see Tables 16a and 16b).
Table 16a. Rx Control/RSSI Register (A3:A0 = 1000)
DATA BIT
DEFAULT
D13
0
Set to 0
D12
0
Enable Rx VGA Gain Programming Serially. 0: Rx VGA gain programmed with external digital inputs
(B7:B1); 1: Rx VGA gain programmed with serial data bits in the Rx gain register (D6:D0).
D11
0
RSSI Output Range. 0: low range (0.5V to 2V); 1: high range (0.5V to 2.5V).
D10
0
RSSI Operating Mode. 0: RSSI disabled if RXHP = 0, and enabled if RXHP = 1; 1: RSSI enabled
independent of RXHP (see Table 16c).
D9
0
Set to 0
D8
0
RSSI Pin Function. 0: outputs RSSI signal in Rx mode; 1: outputs temperature sensor voltage in Rx,
Tx, and standby modes (see Table 16c).
D7
0
D6
0
D5
1
D4
0
D3
0
D2
1
D1
0
D0
1
Maxim Integrated
DESCRIPTION
Set to 0
Set to 1
Set to 0
Rx Highpass -3dB Corner Frequency when RXHP = 0. 0: 100Hz; 1: 30kHz
Set D1:D0 = 01
35
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 16b. Rx HP -3dB Corner Frequency
Adjustment
RXHP
A3:A0 = 1000, D2
Rx HP -3dB CORNER
FREQUENCY
1
X
600kHz
0
1
30kHz
0
0
100Hz
Table 16c. RSSI Pin Truth Table
INPUT CONDITIONS
RSSI OUTPUT
A3:A0 = 1000, D8
A3:A0 = 1000, D10
RXENA
RXHP
0
0
0
X
No Signal
0
0
1
0
No Signal
0
0
1
1
RSSI
0
1
0
X
No Signal
0
1
1
X
RSSI
1
X
X
X
Temperature Sensor
Tx Linearity/Baseband Gain Register Definition
(A3:A0 = 1001)
This register allows the adjustment of the Tx gain and
linearity (see Table 17).
Table 17. Tx Linearity/Baseband Gain Register (A3:A0 = 1001)
DATA BIT
DEFAULT
D13
0
D12
0
D11
0
D10
0
D9
1
D8
0
D7
0
D6
0
D5
0
D4
0
D3
0
D2
0
D1
0
D0
0
36
DESCRIPTION
Set to 0
Enable Tx VGA Gain Programming Serially. 0: Tx VGA gain programmed with external digital inputs
(B6:B1); 1: Tx VGA gain programmed with data bits in the Tx gain register (D5:D0).
PA Driver Linearity. D9:D8 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78% current; 11:
100% current (maximum linearity).
Tx VGA Linearity. D7:D6 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78% current; 11:
100% current (maximum linearity).
Set to 0
Tx Upconverter Linearity. D3:D2 = 00: 50% current (minimum linearity); 01: 63% current; 10: 78%
current; 11: 100% current (maximum linearity).
Tx Baseband Gain. D1:D0 = 00: max baseband gain - 5dB; 01: max baseband gain - 3dB; 10: max
baseband gain - 1.5dB; 11: max baseband gain.
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Table 18. PA Bias DAC Register
(A3:A0 = 1010)
DATA BIT
DEFAULT
D13
0
D12
0
D11
0
D10
0
D9
1
D8
1
DATA BIT
DEFAULT
D13
0
D12
0
D11
0
D10
0
D9
0
D8
0
D7
0
D6
0
0
D5
0
D4
0
D4
0
D3
0
D3
0
D2
0
D1
0
D0
0
D7
1
D6
1
D5
D2
0
D1
0
D0
0
DESCRIPTION
Table 20. Tx VGA Gain Register
(A3:A0 = 1100)
Set to 0
Sets PA bias DAC turn-on delay
after TXENA is set high and A3:A0
= 0010, D10 = 1, in steps of 0.5µs.
D9:D6 = 0001 corresponds to 0µs
and 1111 corresponds to 7µs.
Sets PA bias DAC output current in
steps of 5µA. D5:D0 = 000000
corresponds to 0µA and 111111
corresponds to 315µA.
DEFAULT
D13
0
D12
0
D11
0
D10
0
D9
0
D8
0
D7
0
D6
1
D5
1
D4
1
D3
1
D2
1
D1
1
D0
1
Maxim Integrated
Not Used. For faster Tx VGA gain
setting, only D5:D0 need to be
programmed.
Tx VGA Gain Control. D5 maps to
digital input pin B6 and D0 maps to
digital input pin B1. D5:D0 =
000000 corresponds to minimum
gain.
PA Bias DAC Register Definition (A3:A0 = 1010)
This register controls the output current of the DAC,
which biases the external PA (see Table 18).
Table 19. Rx Gain Register
(A3:A0 = 1011)
DATA BIT
DESCRIPTION
DESCRIPTION
Not Used. For faster Rx gain
setting, only D6:D0 need to be
programmed.
Rx Gain Register Definition (A3:A0 = 1011)
This register sets the Rx baseband and RF gain when
A3:A0 = 1000, D12 = 1 (see Table 19).
Tx VGA Gain Register Definition (A3:A0 = 1100)
This register sets the Tx VGA gain when A3:A0 = 1001,
D10 = 1 (see Table 20).
Applications Information
Rx LNA
Gain
Control
Rx VGA
Gain
Control
MIMO Applications
Rx baseband and RF
gain-control bits. D6
maps to digital input
pin B7 and D0 maps
to digital input pin B1.
D6:D0 = 0000000
corresponds to
minimum gain.
The MAX2828/MAX2829 support multiple input multiple
output (MIMO) applications where multiple transceivers
are used in parallel. A special requirement for this application is that all receivers must maintain a constant relative local oscillator phase, and that they continue to do so
after any receive-transmit-receive mode switching. The
same requirement holds for the transmitters—they should
all maintain a constant relative phase, and continue to do
so after any transmit-receive-transmit mode switching.
This feature is enabled in the MAX2828/MAX2829 by programming A3:A0 = 0010, D13 = 1 and A3:A0 = 0101,
D13 = 1. The constant relative phases of the multiple
transceivers are maintained in the transmit, receive, and
standby modes of operation, as long as they are all using
a common external reference frequency source (crystal
oscillator).
37
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Rx Gain Control
Tx VGA Gain Control
The receiver gain can be set either by the digital input
pins B1 through B7 or by the internal Rx gain register.
The gain-control characteristic is shown in the Typical
Operating Characteristics.
The Tx gain can be set either by digital input pins B1
through B6 or by the internal Tx VGA gain register. The
linearity of the Tx blocks can also be adjusted (Table 17).
The Tx VGA gain-control characteristic is shown in the
Typical Operating Characteristics.
RSSI
The RSSI output can be configured for two output
voltage ranges: 0.5V to 2V and 0.5V to 2.5V (see
Table 16a). The RSSI output is unaffected by the Rx
VGA gain setting. They are capable of driving loads
up to 10kΩ || 5pF.
Chip Information
TRANSISTOR COUNT: 42,998
PROCESS: BiCMOS
RXBBQ-
RXBBQ+
RXBBI-
RXBBI+
VCC
B1
VCC
B2
VCC
B3
B4
VCC
B5
TOP VIEW
GND
Pin Configurations (continued)
Loop Filter
The loop-filter topology and component values can be
found in the MAX2828/MAX2829 evaluation kit data
sheet. A 150kHz loop bandwidth is recommended to
ensure that the loop settles fast enough during Tx/Rx
turnaround times.
56 55 54 53 52 51 50 49 48 47 46 45 44 43
B6
1
42 RXHP
VCC
2
41 RXENA
B7
3
40 RSSI
RXRFL
4
39 SHDN
GND
5
38 VCC
RXRFH
6
37 BYPASS
GND
7
TXRFH+
8
TXRFH-
9
34 GND
VCC
10
33 CPOUT
TXRFL+
11
32 GND
TXRFL-
12
31 VCC
TXENA
13
30 ROSC
PABIAS
14
29 LD
36 TUNE
MAX2829
35 GND
CS
SCLK
DIN
VCC
GND
VREF
VCC
RBIAS
VCC
TXBBQ-
TXBBQ+
TXBBI-
VCC
38
TXBBI+
15 16 17 18 19 20 21 22 23 24 25 26 27 28
Maxim Integrated
MAX2828/MAX2829
Single-/Dual-Band 802.11a/b/g
World-Band Transceiver ICs
Package Information
56L THIN QFN.EPS
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
© Maxim Integrated
39
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