19-1834; Rev 1; 5/01
KIT
ATION
EVALU
E
L
B
A
AVAIL
W-CDMA LNA/Mixer ICs
Features
♦ Ultra-Low Current Consumption: 10.7mA
(MAX2387), 9.9mA (MAX2388), and 7.9mA
(MAX2389)
♦ +2.7V to +3.3V Single-Supply Operation
♦ Mixer NF: 7dB SSB
♦ Cascaded Noise Figure: 2.3dB
♦ LNA Low-Gain Mode: 32dB Gain Step (MAX2387)
or 18dB Gain Step (MAX2388/MAX2389)
♦ Mixer IIP3: 6dBm
♦ < 1µA Shutdown Current
♦ Ultra-Small (3mm ✕ 3mm) 12-Pin QFN Package
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX2387EGC
-40°C to +85°C
12 QFN
MAX2388EGC
-40°C to +85°C
12 QFN
MAX2389EGC
-40°C to +85°C
12 QFN
________________________Applications
Japanese 3rd-Generation W-CDMA Cellular
Phones
Dual-Mode W-CDMA/GSM Cellular Phones
Pin Descriptions/Functional Diagrams
BIAS
TOP VIEW
12
LNA_OUT
1
GAIN
MIX_IN
GND
11
LNA_IN
10
MAX2387/MAX2388
LNA_OUT
1
IF+
GAIN
IF-
MIX_IN
9
VCC
2
8
3
7
BIAS
BIAS
GND
LNA_IN
12
11
10
MAX2389
9
VCC
2
8
IF+
3
7
IF-
BIAS
4
5
6
4
5
6
SHDN
LO+
LO-
SHDN
LO+
LO-
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX2387/MAX2388/MAX2389
General Description
The MAX2387/MAX2388/MAX2389 low-noise amplifier
(LNA), downconverter mixers designed for W-CDMA
applications, are ideal for ARIB (Japan) and ETSIUMTS (Europe) based systems. The MAX2387/
MAX2388/MAX2389 feature ultra-low current consumption and exceptionally low noise figures in ultra-small
packages.
The MAX2387/MAX2388 include an LNA, a downconverter mixer, and a local-oscillator (LO) buffer. The
MAX2389 has an LNA and mixer, but minimizes current
consumption by omitting the LO buffer. For all devices,
the LNA and downconverter mixers are optimized for
the 2110MHz to 2170MHz band. All devices feature a
high-gain mode and a low-gain mode of LNA operation.
The MAX2387 has a 32dB gain step, and the
MAX2388/MAX2389 have an 18dB gain step. All ICs
include a shutdown mode, powering down the IC during the front-end receiver’s idle periods.
The mixer 3rd-order nonlinearity performance is set
using an external biasing resistor. For the MAX2387/
MAX2388, mixer performance is optimized for a
-10dBm typical drive at the LO buffer input port. The
MAX2389 mixer performance is optimized for a
-4dBm typical drive at the LO input port. The LO port
for all versions is configurable for either single-ended or
differential operation.
These devices operate from a +2.7V to +3.3V single supply and are available in ultra-small (3mm ✕ 3mm) 12-pin
leadless packages (QFN).
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
ABSOLUTE MAXIMUM RATINGS
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature (10s) ...........................................+300°C
VCC to GND ...........................................................-0.3V to +4.3V
SHDN, GAIN to GND..................................-0.3V to (VCC + 0.3V)
AC Signals ....................................................................+1V peak
Digital Input Current .........................................................±10mA
Continuous Power Dissipation (TA = +70°C)
12-Pin QFN (derate 11.9mW/°C above TA = +70°C)...952mW
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
(VCC = +2.7V to +3.3V, SHDN = high, RBIAS = 24kΩ, no input AC signals, TA = -40°C to +85°C. Typical values are at VCC = +2.7V,
TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
High-gain mode
Operating Supply Current
ICC
Low-gain mode
MIN
ICC
Digital Input Logic High
VIH
Digital Input Logic Low
VIL
Input Logic High Current
IIH
VIN = VIH
Input Logic Low Current
IIL
VIN = VIL
MAX
MAX2387
10.7
12.4
MAX2388
9.9
11.7
MAX2389
7.9
9.3
MAX2387
7.2
8.7
MAX2388
6.7
8.1
MAX2389
4.7
5.7
0.2
1.0
SHDN = low
Shutdown Supply Current
TYP
2.0
UNITS
mA
µA
V
0.6
V
1
µA
-20
µA
AC ELECTRICAL CHARACTERISTICS
(MAX238_ EV kit, VCC = 2.7V, SHDN = high, fRF_IN = fLNA_IN = 2140MHz, fLO = 2330MHz (fIF = 190MHz). Mixer, LNA, and LO input
ports are driven with 50Ω sources. RBIAS = 24kΩ ±1%, PLO = -10dBm (MAX2387/MAX2388), PLO = -4dBm (MAX2389), PRF =
-30dBm. Typical values are at VCC = +2.7V, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2170
MHz
LNA PERFORMANCE: LOW-GAIN MODE (GAIN = HIGH)
RF Frequency Range (Note 1)
Gain
2
fRF
GLNA
2110
TA = +25°C
13.5
TA = -40°C to +85°C (Note 2)
12.9
15
_______________________________________________________________________________________
16.5
17.0
dB
W-CDMA LNA/Mixer ICs
(MAX238_ EV kit, VCC = 2.7V, SHDN = high, fRF_IN = fLNA_IN = 2140MHz, fLO = 2330MHz (fIF = 190MHz). Mixer, LNA, and LO input
ports are driven with 50Ω sources. RBIAS = 24kΩ ±1%, PLO = -10dBm (MAX2387/MAX2388), PLO = -4dBm (MAX2389), PRF =
-30dBm. Typical values are at VCC = +2.7V, TA = +25°C, unless otherwise noted.)
TYP
MAX
UNITS
Noise Figure (Notes 1, 3)
PARAMETER
SYMBOL
NFLNA
TA = +25°C
CONDITIONS
MIN
1.7
2.2
dB
3rd-Order Input Intercept Point
(Note 4)
IIP3LNA
TA = -40°C to +85°C (Note 2)
4.2
dBm
Input -1dB Compression Point
(Note 1)
IP-1dB
-19
-13
dBm
MAX2387
-18.5
-16.5
-14.5
MAX2388/
MAX2389
-4.7
-2.8
-0.9
MAX2387
-10.5
-14
MAX2388/
MAX2389
5.4
-0.7
LNA PERFORMANCE: LOW-GAIN MODE (GAIN = LOW)
TA = +25°C
Gain
GLNA
TA = -40°C to +85°C
(Note 2)
Noise Figure (Notes 1, 3)
NFLNA
3rd-Order Input Intercept Point
(Note 5)
IIP3LNA
Input -1dB Compression Point
IP-1dB
MAX2387
19.2
21.3
MAX2388/
MAX2389
6.5
8.4
MAX2387
1
MAX2388/
MAX2389
3.4
MAX2387
-9.9
MAX2388/
MAX2389
-7.7
dB
dB
dBm
dBm
MIXER PERFORMANCE (GAIN = HIGH)
RF Frequency Range (Note 1)
fRF
2110
2170
MHz
LO Frequency Range (Note 1)
fLO
2250
2600
MHz
IF Frequency Range (Note 1)
fIF
150
400
MHz
Power Conversion Gain
GMXR
Noise Figure (SSB) (Note 1)
NFMXR
TA = +25°C
8.5
TA = -40°C to +85°C (Note 2)
7.5
TA = +25°C
10
11.5
12.5
MAX2387
7.2
8.8
MAX2388
6.8
8.2
MAX2389
7.3
9.5
dB
dB
_______________________________________________________________________________________
3
MAX2387/MAX2388/MAX2389
AC ELECTRICAL CHARACTERISTICS (continued)
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX238_ EV kit, VCC = 2.7V, SHDN = high, fRF_IN = fLNA_IN = 2140MHz, fLO = 2330MHz (fIF = 190MHz). Mixer, LNA, and LO input
ports are driven with 50Ω sources. RBIAS = 24kΩ ±1%, PLO = -10dBm (MAX2387/MAX2388), PLO = -4dBm (MAX2389), PRF =
-30dBm. Typical values are at VCC = +2.7V, TA = +25°C, unless otherwise noted.)
PARAMETER
3rd-Order Input Intercept Point
(Notes 1, 3)
SYMBOL
CONDITIONS
IIP3MXR
MIN
MAX2387
6
MAX2388
6
MAX2389
5
MAX2387
Input -1dB Compression Point
(Note 1)
IP-1dB,MXR
TA = -40°C to +85°C
TYP
-13.9
MAX
UNITS
dBm
-10
MAX2388
-16.3
-10.5
MAX2389
-15.4
-10.5
TA = +25°C
7.5
9.0
TA = -40°C to +85°C
6.5
dBm
MIXER PERFORMANCE (GAIN = LOW)
Power Conversion Gain (Note 1)
Noise Figure (SSB) (Note 1)
3rd-Order Input Intercept Point
(Note 4)
GMXR
NFMXR
IIP3MXR
TA = +25°C
TA = +25°C
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
4
IP-1dB,MXR
TA = -40°C to +85°C
12.0
MAX2387
6.9
8.4
MAX2388
6.1
7.4
MAX2389
6.6
8.8
MAX2387
0.7
MAX2388
0.2
MAX2389
1.3
MAX2387
Input -1dB Compression Point
(Note 1)
10.5
-15.0
dB
dB
dBm
-10.7
MAX2388
-18.2
-11.3
MAX2389
-17.8
-11.9
Guaranteed by design and characterization.
MIN guaranteed by production test, MAX guaranteed by design and characterization.
Includes input matching circuit loss.
fIN1 = 2140MHz, fIN2 = 2141MHz, PIN = -30dBm per tone.
fIN1 = 2140MHz, fIN2 = 2141MHz, PIN = -25dBm per tone.
_______________________________________________________________________________________
dBm
W-CDMA LNA/Mixer ICs
MAX2387
LNA GAIN vs. TEMPERATURE
VCC = +4.3V
LOW-GAIN
VCC = +2.7V
LOW-GAIN
6
4
-15
10
35
60
LOW-GAIN MODE
-8
-10
-40
35
60
85
-40
-15
10
35
60
85
MAX2387
MIXER CONVERSION GAIN
vs. LO INPUT POWER
MAX2387
MIXER IIP2 AND IIP3 vs. TEMPERATURE
MAX2387
MIXER INPUT -1dB COMPRESSION POINT
vs. TEMPERATURE
25
IIP2: HIGH-GAIN
MODE, SINGLEENDED LO
20
IIP (dBm)
15
IIP2: HIGH-GAIN
MODE, DIFFERENTIAL
LO
10
5
4
0
2
IIP3: HIGH-GAIN
MODE
-5
-12
-11
-10
-9
-8
-10
-12
-14
-16
-40
-7
-8
IIP3: LOW-GAIN
MODE
-10
0
-6
-1dB COMPRESSION POINT (dBm)
30
MAX2387/88/89 toc04
HIGH-GAIN MODE
6
-15
10
35
60
85
-40
-15
10
35
60
85
LO INPUT LEVEL (dBm)
TEMPERATURE (°C)
TEMPERATURE (°C)
MAX2387
MIXER LO-IF AND LO-RF ISOLATION
vs. LO FREQUENCY
MAX2387
LNA NOISE FIGURE vs. FREQUENCY
MAX2387
MIXER NOISE FIGURE vs. LO POWER
LO-IF: LOW-GAIN
MODE
15
LOW-GAIN MODE
15
10
HIGH-GAIN MODE
10
6
LOW-GAIN MODE
5
4
0
2320
7
VCC = +2.7V
LO = -10dBm
0
2310
HIGH-GAIN MODE
5
LO-IF: HIGH-GAIN
MODE
2300
MAX2387/88/89 toc09
20
8
NOISE FIGURE (dB)
25
MAX2387/88/89 toc08
LO-RF: HIGH-GAIN
MODE
NOISE FIGURE (dB)
LO-RF: LOW-GAIN
MODE
25
MAX2387/88/89 toc07
40
5
10
TEMPERATURE (°C)
LOW-GAIN MODE
20
-15
TEMPERATURE (°C)
8
30
-6
-20
85
10
35
LOW-GAIN MODE
TEMPERATURE (°C)
12
-13
0
-2
-15
MAX2387/88/89 toc05
-40
2
-4
-10
VCC = +3.3V
HIGH-GAIN
2
CONVERSION GAIN (dB)
0
HIGH-GAIN MODE
6
-5
4
ISOLATION (dB)
5
8
MAX2387/88/89 toc06
8
HIGH-GAIN MODE
IIP3 (dBm)
10
GAIN (dB)
SUPPLY CURRENT (mA)
12
15
10
10
MAX2387/88/89 toc02
VCC = +2.7V VCC = +3.3V VCC = +4.3V
HIGH-GAIN LOW-GAIN HIGH-GAIN
14
20
MAX2387/88/89 toc01
16
MAX2387
LNA IIP3 vs. TEMPERATURE
MAX2387/88/89 toc03
MAX2387
SUPPLY CURRENT vs. TEMPERATURE
2330
2340
FREQUENCY (MHz)
2350
2360
2110
2120
2130
2140
2150
FREQUENCY (MHz)
2160
2170
-13
-12
-11
-10
-9
-8
-7
LO POWER (dB)
_______________________________________________________________________________________
5
MAX2387/MAX2388/MAX2389
Typical Operating Characteristics
(TA = +25°C, VCC = +2.7V, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, VCC = +2.7V, unless otherwise noted.)
MAX2388
LNA GAIN vs. TEMPERATURE
12
15
VCC = +4.3V
LOW-GAIN
8
10
5
6
4
-15
10
-6
-5
-10
35
60
85
-40
-15
10
35
60
10
35
60
85
TEMPERATURE (°C)
MAX2388
MIXER CONVERSION GAIN
vs. LO INPUT POWER
MAX2388
MIXER IIP2 AND IIP3 vs. TEMPERATURE
MAX2388
MIXER INPUT -1dB COMPRESSION POINT
vs. TEMPERATURE
20
IIP (dBm)
HIGH-GAIN MODE
6
15
IIP2: HIGH-GAIN
MODE,
SINGLE-ENDED LO
IIP2: HIGH-GAIN
MODE, DIFFERENTIAL LO
10
5
4
0
2
-5
0
IIP3: HIGH-GAIN
MODE
IIP3: LOW-GAIN
MODE
-10
-12
-11
-10
-9
-8
-7
-40
-15
10
35
60
MAX2387/88/89 toc15
25
-6
-1dB COMPRESSION POINT (dBm)
30
MAX2387/88/89 toc13
LOW-GAIN MODE
-8
-10
-12
-14
-16
-40
85
-15
10
35
60
LO INPUT LEVEL (dBm)
TEMPERATURE (°C)
TEMPERATURE (°C)
MAX2388
MIXER LO-IF AND LO-RF ISOLATION
vs. LO FREQUENCY
MAX2388
LNA NOISE FIGURE vs. FREQUENCY
MAX2388
MIXER NOISE FIGURE vs. LO POWER
LO-IF: LOW-GAIN
MODE
15
10
HIGH-GAIN MODE
0
2310
2320
MAX2387/88/89 toc18
7
6
LOW-GAIN MODE
VCC = +2.7V
LO = -10dBm
0
2300
85
5
2
LO-IF: HIGH-GAIN
MODE
5
6
4
HIGH-GAIN MODE
NOISE FIGURE (dB)
NOISE FIGURE (dB)
25
LOW-GAIN MODE
8
8
MAX2387/88/89 toc17
LO-RF: HIGH-GAIN
MODE
LO-RF: LOW-GAIN
MODE
10
MAX2387/88/89 toc16
40
20
-15
TEMPERATURE (°C)
8
30
-40
85
TEMPERATURE (°C)
10
35
LOW-GAIN MODE
-8
12
-13
0
-2
0
MAX2387/88/89 toc14
-40
2
-4
LOW-GAIN MODE
VCC = +2.7V VCC = +3.3V
LOW-GAIN LOW-GAIN
HIGH-GAIN MODE
6
IIP3 (dBm)
10
2
CONVERSION GAIN (dB)
8
HIGH-GAIN MODE
4
2330
2340
FREQUENCY (MHz)
6
10
MAX2387/88/89 toc11
VCC = +2.7V VCC = +3.3V VCC = +4.3V
HIGH-GAIN HIGH-GAIN HIGH-GAIN
GAIN (dB)
SUPPLY CURRENT (mA)
14
20
MAX2387/88/89 toc10
16
MAX2388
LNA IIP3 vs. TEMPERATURE
MAX2387/88/89 toc12
MAX2388
SUPPLY CURRENT vs. TEMPERATURE
ISOLATION (dB)
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
2350
2360
4
2110
2120
2130
2140
2150
FREQUENCY (MHz)
2160
2170
-13
-12
-11
-10
-9
LO POWER (dB)
_______________________________________________________________________________________
-8
-7
W-CDMA LNA/Mixer ICs
MAX2389
LNA GAIN vs. TEMPERATURE
20
15
8
10
8
4
IIP3 (dBm)
VCC = +4.3V
LOW-GAIN
VCC = +2.7V
HIGH-GAIN
6
10
5
4
VCC = +2.7V
LOW-GAIN
2
2
0
-2
LOW-GAIN MODE
-4
LOW-GAIN MODE
VCC = +3.3V
LOW-GAIN
HIGH-GAIN MODE
6
HIGH-GAIN MODE
GAIN (dB)
SUPPLY CURRENT (mA)
10
VCC = +4.3V
HIGH-GAIN
MAX2387/88/89 toc20
VCC = +3.3V
HIGH-GAIN
MAX2387/88/89 toc19
12
MAX2389
LNA IIP3 vs. TEMPERATURE
MAX2387/88/89 toc21
MAX2389
SUPPLY CURRENT vs. TEMPERATURE
0
-6
-5
-10
-8
0
-15
10
35
60
85
-15
35
60
20
15
10
IIP2: HIGH-GAIN
MODE,
DIFFERENTIAL LO
IIP2: HIGH-GAIN
MODE,
SINGLE-ENDED LO
0
IIP3: HIGH-GAIN
MODE
-5
-10
0
-10
-9
-8
-40
-7
-15
LO-RF: HIGH-GAIN
MODE
LO-RF: LOW-GAIN
MODE
35
LO-IF: LOW-GAIN
MODE
25
LO-IF: HIGH-GAIN
MODE
60
-16
-40
85
-15
10
35
60
MAX2389
LNA NOISE FIGURE vs. FREQUENCY
MAX2389
MIXER NOISE FIGURE vs. LO POWER
LOW-GAIN MODE
8
6
4
HIGH-GAIN MODE
9
8
85
HIGH-GAIN MODE
7
6
LOW-GAIN MODE
5
2
4
0
2320
-14
VCC = +2.7V
LO = -4dBm
10
2310
-12
TEMPERATURE (°C)
10
NOISE FIGURE (dB)
45
MAX2387/88/89 toc25
50
35
-10
TEMPERATURE (°C)
LO INPUT LEVEL (dBm)
MAX2389
MIXER LO-IF AND LO-RF ISOLATION
vs. LO FREQUENCY
10
NOISE FIGURE (dB)
-11
MAX2387/88/89 toc26
-12
IIP3: LOW-GAIN
MODE
-8
MAX2387/88/89 toc27
IIP (dBm)
HIGH-GAIN MODE
2
2300
85
MAX2387/88/89 toc24
25
5
15
60
-6
-1dB COMPRESSION POINT (dBm)
MAX2387/88/89 toc22
30
4
20
35
MAX2389
MIXER INPUT -1dB COMPRESSION POINT
vs. TEMPERATURE
6
30
10
MAX2389
MIXER IIP2 AND IIP3 vs. TEMPERATURE
LOW-GAIN MODE
40
-15
MAX2389
MIXER CONVERSION GAIN
vs. LO INPUT POWER
8
-13
-40
85
TEMPERATURE (°C)
10
ISOLATION (dB)
10
TEMPERATURE (°C)
12
CONVERSION GAIN (dB)
-40
TEMPERATURE (°C)
MAX2387/88/89 toc23
-40
2330
2340
FREQUENCY (MHz)
2350
2360
2110
2120
2130
2140
2150
FREQUENCY (MHz)
2160
2170
-7
-6
-5
-4
-3
-2
-1
LO POWER (dB)
_______________________________________________________________________________________
7
MAX2387/MAX2388/MAX2389
Typical Operating Characteristics (continued)
(TA = +25°C, VCC = +2.7V, unless otherwise noted.)
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
Pin Description
PIN
NAME
FUNCTION
1
LNA_OUT
2
GAIN
3
MIX_IN
RF Input Port for Mixer. Internally matched to 50Ω.
4
SHDN
Shutdown Input. Drive low to enable shutdown mode. Drive high or connect to VCC for normal
operation.
5
LO+
Noninverting LO Input for LO Buffer (MAX2387/MAX2388) or Mixer (MAX2389). Differential input
impedance is 200Ω. AC-couple to GND when the LO is driven single-endedly.
6
LO-
Inverting LO Input for LO Buffer (MAX2387/MAX2388) or Mixer (MAX2389). Differential input
impedance is 200Ω.
7
IF-
Inverting Mixer’s IF Open-Collector Output
8
IF+
Noninverting Mixer’s IF Open-Collector Output
9
VCC
Supply Voltage (+2.7V to +3.3V). Capacitively bypass to GND near the IC.
10
LNA_IN
11
GND
Ground
12
BIAS
LNA/Mixer Bias Pin. For nominal bias, connect 24kΩ ±1% resistor to GND.
RF Output Port for LNA. Requires external matching.
LNA/Mixer Gain Control Input
RF Input Port for LNA. Requires external matching.
Detailed Description
The MAX2387/MAX2388/MAX2389 include an LNA
and downconverter mixer. These devices feature a
shutdown mode to power down the IC during the frontend receiver’s idle periods. Each IC operates from a
+2.7V to +3.3V single supply and is housed in a 12-pin
ultra-small QFN (3mm ✕ 3mm) leadless package.
The MAX2387/MAX2388/MAX2389 are fabricated using
an advanced high-frequency silicon germanium
process. The LNA and mixer NF and IIP3 have been
optimized to provide excellent RF performance in the
2110MHz to 2170MHz band, while drawing minimal
current.
For the MAX2387/MAX2388, the mixer’s performance is
optimized for a -10dBm typical drive at the LO buffer
input port. The MAX2389’s mixer performance is optimized for a -4dBm typical drive at the LO input port.
The LO port for all versions can be driven either singleended or differentially.
LNA High/Low-Gain Mode
These devices offer two modes of operation for the LNA:
high-gain mode and low-gain mode, selectable with a
GAIN select pin. The MAX2387 has a gain of 15dB in
high-gain mode and -16.6dB in low-gain mode. The
MAX2388/MAX2389 have a gain of 15dB in high-gain
mode and -2.8dB in low-gain mode. Matching LNA in
high-gain mode will ensure matching in low-gain mode.
8
Downconverter Mixer
The receive mixer is a wideband, single-balanced
design with exceptional noise figure and linearity. The
LO input frequency range is 2330MHz to 2360MHz and
the RF input frequency range is 2110MHz to 2170MHz.
The mixer is internally matched to 50Ω, thus eliminating
any external matching components.
LO Input Buffers
The MAX2387/MAX2388 feature open-collector LO
buffers to increase isolation between the LO and the
rest of the system. The MAX2389 offers a lower current
consumption for applications that do not require an LO
buffer.
RF Inputs
The MIX_IN input is typically connected to the LNA output through an off-chip filter providing image rejection
and out-of-band interferers filtering. The LNA input and
output require an external matching network to 50Ω.
Note that the mixer input is internally matched to 50Ω.
See Figure 1, Typical Application Circuits for 2.14GHz.
LO Inputs
The LO+ and LO- pins are internally terminated with
100Ω resistors. AC-couple the local-oscillator signal to
these pins. If a single-ended LO source is used, connect LO+ to ground using an AC-coupling capacitor.
_______________________________________________________________________________________
W-CDMA LNA/Mixer ICs
For the best gain and noise performance, use highquality components for the LNA input matching circuit,
and solder the slug evenly to the board ground plane.
For the power supplies, a star topology works well to
isolate between different sections of the device. Each
VCC node has its own path to a central VCC. Place
decoupling capacitors that provide low impedance at
the RF frequency of interest close to all VCC connections. The central VCC should have a large decoupling
capacitor as well. (Use MAX2387/MAX2388/MAX2389
EV kit as an example.)
Applications Information
Layout
A properly designed PC board is essential to any
RF/microwave circuit. Keep RF signal lines as short as
possible to minimize losses and radiation. Always use
controlled impedance lines on all high-frequency inputs
and outputs and use low-inductance connections to
ground on all GND pins. At the mixer outputs, keep the
differential lines together and of the same length to
ensure signal balance.
Chip Information
TRANSISTOR COUNT: 208
Typical Application Circuits
2.2nH
24kΩ
RX
GND
0.8pF
BIAS_SET
12
11
10
VCC
LNA_IN
TX
27nH
LNA_OUT
0.8pF
6800pF
1
2.2nH
10nF
39pF
9
BIAS
IF
SAW
10kΩ
2
8
GAIN
6800pF
3
27nH
22pF
IF-
MAX2387
MAX2388
MAX2389
MIX_IN
VCC
4
10nF
IF+ 10kΩ
7
20Ω
RX BPF
VCC
10µF
39pF
5
10kΩ
6
LO+
82pF
ZL
LO82pF
SHDN
VCO
Figure 1. MAX2387/MAX2388/MAX2389 Differential IF Load; Single-Ended VCO
_______________________________________________________________________________________
9
MAX2387/MAX2388/MAX2389
IF Output Port
The mixer output appears on the differential IF+ and IFpins. These open-collector outputs require an external
inductor to V CC for DC biasing. This port typically
requires a matching network for coupling to an external
IF filter. Figures 1 and 2 show examples of differential
and single-ended IF port connections.
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
2.2nH
24kΩ
RX
GND
0.8pF
BIAS
12
11
10
VCC
LNA_IN
VCC
10nF
TX
6800pF
27nH
LNA_OUT
0.8pF
1
2.2nH
10nF
9
BIAS
10kΩ
2
8
39pF
10kΩ
GAIN
6800pF
3
7
20Ω
MAX2387
MAX2388
MAX2389
MIX_IN
RX BPF
VCC
4
10nF
22pF
39pF
6
LO+
LO82pF
82pF
SHDN
27nH
IFIFOUT
5
10kΩ
5.6nH
VCO
Figure 2. MAX2387/MAX2388/MAX2389 Differential IF Load; Differential VCO
10
IF
SAW
IF+
______________________________________________________________________________________
ZL
W-CDMA LNA/Mixer ICs
S-PARAMETERS
LNA (S11)
LNA (S21)
LNA (S12)
LNA (S22)
FREQUENCY
(MHZ)
MAGNITUDE
PHASE
MAGNITUDE
PHASE
MAGNITUDE
PHASE
MAGNITUDE
PHASE
600
0.83287
-41.655
5.2176
146.82
0.020023
79.051
0.92461
-15.535
700
0.81889
-43.792
5.0791
145.33
0.021153
78.88
0.9171
-16.23
800
0.80364
-46.486
4.9464
143.26
0.022406
78.412
0.91098
-17.187
-18.177
900
0.78522
-49.489
4.7767
141.09
0.023962
79.181
0.90108
1000
0.76638
-53.118
4.6109
138.2
0.025913
78.989
0.8914
-19.536
1100
0.74542
-56.424
4.4363
135.68
0.027189
79.621
0.87913
-20.759
1200
0.72614
-59.477
4.2861
133.2
0.028484
79.666
0.86957
-22.045
1300
0.70338
-62.232
4.1209
130.93
0.030015
80.686
0.85623
-23.156
1400
0.68291
-64.933
4.0146
128.4
0.030979
81.41
0.84504
-24.46
1500
0.66114
-67.298
3.8951
126.82
0.032236
82.856
0.83313
-25.525
1600
0.63958
-69.782
3.7818
124.53
0.033056
83.763
0.82095
-26.882
1700
0.61641
-72.041
3.6761
122.88
0.03398
85.56
0.80875
-28.147
1800
0.59303
-74.571
3.5823
120.51
0.035009
86.377
0.79497
-29.825
1900
0.56989
-76.974
3.5198
118.87
0.036332
88.572
0.78338
-31.503
2000
0.54509
-79.651
3.4376
116.77
0.036887
89.686
0.76891
-33.44
2100
0.52084
-82.452
3.3691
115.17
0.038318
91.409
0.75735
-35.559
2200
0.49554
-85.891
3.2858
112.47
0.039355
93.409
0.74365
-38.175
2300
0.47232
-89.473
3.2544
110.28
0.040817
94.973
0.73415
-41.034
2400
0.44892
-93.529
3.195
108.05
0.042049
97.086
0.72262
-44.165
2500
0.42766
-98.164
3.1347
105.62
0.043438
98.58
0.71335
-47.828
2600
0.40833
-103.42
3.06
102.94
0.044844
100.14
0.70474
-51.733
2700
0.39421
-109.16
2.9818
100.13
0.046899
101.7
0.70067
-56.04
2800
0.38321
-115.32
2.9149
96.964
0.048389
103.31
0.69795
-60.397
2900
0.37608
-121.52
2.821
94.462
0.049426
104.62
0.69514
-64.899
3000
0.37573
-128.03
2.7086
91.479
0.05079
106.39
0.69504
-69.425
3100
0.38123
-134.23
2.5802
88.528
0.051657
108.22
0.69915
-73.798
3200
0.39208
-139.73
2.4696
85.584
0.053915
110.43
0.70504
-77.625
3300
0.40626
-144.57
2.3296
83.264
0.055483
113.29
0.71095
-81.166
3400
0.42512
-148.8
2.2157
80.95
0.05783
115.29
0.71819
-84.4
3500
0.44708
-152.13
2.0519
79.588
0.060614
118.09
0.72516
-87.06
3600
0.47302
-154.7
1.9382
77.337
0.065129
119.23
0.73416
-89.168
3700
0.49849
-156.57
1.8048
76.594
0.069104
120.99
0.73997
-90.676
Package Information
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX2387/MAX2388/MAX2389
Table 1. LNA Input/Output S-Parameters (VCC = +2.7V, High-Gain Mode)
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