HMC792ALP4E
v00.0613
ATTENUATORS - DIGITAL - SMT
0.25 LSB GaAs MMIC 6-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
Typical Applications
Features
The HMC792ALP4E is ideal for:
0.25 dB LSB Steps to 15.75 dB
• Cellular/3G Infrastructure
Power-Up State Selection
• WiBro / WiMAX / 4G
High Input IP3: +53 dBm
• Microwave Radio & VSAT
Low Insertion Loss: 1.8 dB @ 2.0 GHz
• Test Equipment and Sensors
TTL/CMOS Compatible, Serial, Parallel
or Latched Parallel Control
• IF & RF Applications
±0.1 dB Typical Step Error
Single +3V or +5V Supply
24 Lead 4x4mm SMT Package: 16mm2
Functional Diagram
General Description
The HMC792ALP4E is a broadband 6-bit GaAs IC
Digital Attenuator in a low cost leadless SMT package.
This versatile digital attenuator incorporates off-chip
AC ground capacitors for near DC operation, making
it suitable for a wide variety of RF and IF applications.
The dual mode control interface is CMOS/TTL compatible, and accepts either a three wire serial input
or a 6 bit parallel word. The HMC792ALP4E also
features a user selectable power up state and a serial
output port for cascading other Hittite serial controlled
components. The HMC792ALP4E is housed in a
RoHS compliant 4x4 mm QFN leadless package, and
requires no external matching components.
Electrical Specifications, TA = +25° C, Vctl = 0/+Vdd
Parameter
Frequency (GHz)
Typ.
Max.
Vdd = +3V
Min.
Typ.
Max.
Vdd = +5V
2.4
4.0
1.8
2.3
2.4
4.0
Units
Insertion Loss
DC - 3.0 GHz
3.0 - 6.0 GHz
1.8
2.3
Attenuation Range
DC - 6.0 GHz
15.75
15.75
dB
Return Loss (RF1, RF2, All Atten. States)
DC - 6.0 GHz
18
18
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
DC - 6.0 GHz
± (0.2 + 3% of Atten. Setting) Max.
dB
dB
dB
dB
dB
dB
0.05 - 0.15 GHz
0.15 - 6.0 GHz
22
27
22
31
dBm
dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 10 dBm Each Tone)
DC - 6.0 GHz
53
53
dBm
Switching Characteristics
DC - 6.0 GHz
110
150
110
150
ns
ns
2.1
2.2
mA
Input Power for 0.1 dB Compression
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
Supply Current
1
Min.
DC - 6.0 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price,2 delivery,
andDrive,
to place
orders: AnalogMA
Devices,
For price,
delivery
andDevices
to place
orders:
Hittite
Microwave
Elizabeth
Chelmsford,
01824Inc.,
responsibility
is assumed
by Analog
for its use,
nor for any
infringements
of patents orCorporation,
other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373
Order
at www.hittite.com
Phone: On-line
781-329-4700
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC792ALP4E
v00.0613
0.25 LSB GaAs MMIC 6-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
Insertion Loss vs. Temperature
Normalized Attenuation [1]
[1]
(Only Major States are Shown)
-1
-2
-3
-4
-5
-5
-10
-15
-20
0
1
2
3
4
5
6
0
1
2
FREQUENCY (GHz)
+25 C
+85 C
4
5
6
7
8
-40 C
Output Return Loss [1]
(Only Major States are Shown)
(Only Major States are Shown)
0
0
-5
-5
-10
-10
RETURN LOSS (dB)
RETURN LOSS (dB)
3
FREQUENCY (GHz)
Input Return Loss [1]
-15
-20
-25
-30
-35
-15
-20
-25
-30
-35
-40
-40
0
1
2
3
4
5
6
0
1
2
FREQUENCY (GHz)
3
4
5
6
FREQUENCY (GHz)
Bit Error vs. Attenuation State [2]
Bit Error vs. Attenuation State
1
1
0.8
0.8
0.6
0.6
0.4
0.4
BIT ERROR (dB)
BIT ERROR (dB)
ATTENUATORS - DIGITAL - SMT
0
NORMALIZED ATTENUATION (dB)
INSERTION LOSS (dB)
0
0.2
0
-0.2
-0.4
0.2
0
-0.2
-0.4
-0.6
-0.6
-0.8
-0.8
-1
-1
0
4
8
12
16
100 MHz
1 GHz
2 GHz
4 GHz
0
4
8
12
16
ATTENUATION STATE (dB)
ATTENUATION STATE (dB)
6 GHz
900 MHz
2 GHz
4 GHz
6 GHz
[1] Data taken with broadband DC blocks on RF ports, Vdd = 5V
[2] Data taken with ACG capacitors, C4, C5 & C6 removed. See application circuit and note.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price,2 delivery,
andDrive,
to place
orders: AnalogMA
Devices,
For price,
delivery
andDevices
to place
orders:
Hittite
Microwave
Elizabeth
Chelmsford,
01824Inc.,
responsibility
is assumed
by Analog
for its use,
nor for any
infringements
of patents orCorporation,
other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373
Order
at www.hittite.com
Phone: On-line
781-329-4700
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
2
HMC792ALP4E
v00.0613
0.25 LSB GaAs MMIC 6-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
Bit Error vs. Frequency
Bit Error vs. Frequency [2]
2
1.5
1.5
1
1
BIT ERROR (dB)
BIT ERROR (dB)
(Only Major States are Shown)
2
0.5
0
-0.5
0.5
0
-0.5
-1
-1
-1.5
-1.5
-2
-2
0
1
2
3
4
5
6
0
1
2
FREQUENCY (GHz)
0.25 dB
0.5 dB
1 dB
3
4
5
6
FREQUENCY (GHz)
2 dB
4 dB
8 dB
0.25 dB
0.5 dB
1 dB
15.75 dB
Worst Case Step Error Between Successive
Attenuation States (Only Major States are Shown)
2 dB
4 dB
8 dB
15.75 dB
Input IP3 at 25 oC (Major Bit States at Each
Frequency is Shown)
0.5
70
0.4
65
0.3
60
0.2
IP3 (dBm)
STEP ERROR (dB)
ATTENUATORS - DIGITAL - SMT
(Only Major States are Shown)
0.1
0
-0.1
55
50
45
-0.2
40
-0.3
35
-0.4
-0.5
30
0
1
2
3
4
5
6
0
1
2
FREQUENCY (GHz)
0.25 dB
0.5 dB
1 dB
2 dB
4 dB
8 dB
0 dB
0.25 dB
0.5 dB
15.75 dB
Input IP3 at -40 oC (Major Bit States at Each
Frequency is Shown)
4
5
6
70
65
65
60
60
55
55
45
50
45
40
40
35
35
30
8 dB
15.75 dB
Frequency is Shown)
70
50
1 dB
4 dB
2 dB
Input IP3 at 85 oC (Major Bit States at Each
IP3 (dBm)
IP3 (dBm)
3
FREQUENCY (GHz)
30
0
1
2
3
4
5
6
0
1
2
FREQUENCY (GHz)
0 dB
0.25 dB
0.5 dB
1 dB
4 dB
2 dB
3
4
5
6
FREQUENCY (GHz)
8 dB
15.75 dB
0 dB
0.25 dB
0.5 dB
1 dB
4 dB
2 dB
8 dB
15.75 dB
[2] Data taken with ACG capacitors, C4, C5 & C6 removed. See application circuit and note.
3
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price,2 delivery,
andDrive,
to place
orders: AnalogMA
Devices,
For price,
delivery
andDevices
to place
orders:
Hittite
Microwave
Elizabeth
Chelmsford,
01824Inc.,
responsibility
is assumed
by Analog
for its use,
nor for any
infringements
of patents orCorporation,
other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373
Order
at www.hittite.com
Phone: On-line
781-329-4700
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC792ALP4E
v00.0613
0.25 LSB GaAs MMIC 6-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
32
34
30
32
30
28
26
24
28
26
24
22
22
20
20
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
FREQUENCY (GHz)
0.8
0.9
1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
FREQUENCY (GHz)
Serial Control Interface
The HMC792ALP4E contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). The serial control interface
is activated when P/S is kept high. The 6-bit serial word must be loaded MSB first. The positive-edge sensitive CLK
and LE requires clean transitions. If mechanical switches are used, sufficient debouncing should be provided. When
LE is high, 6-bit data in the serial input register is transferred to the attenuator. When LE is high CLK is masked to
prevent data transition during output loading.
When P/S is low, 3-wire SPI interface inputs (SERIN, CLK, LE) are disabled and the input register is loaded with
parallel digital inputs (D0-D5). When LE is high, 6-bit parallel data changes the state of the part per truth table.
ATTENUATORS - DIGITAL - SMT
Input Power for 0.1dB Compression @
Vdd = 5V (Detail of Low Frequency Roll-Off)
P0.1dB (dBm)
P0.1dB (dBm)
Input Power for 0.1dB Compression @
Vdd = 3V (Detail of Low Frequency Roll-Off)
For all modes of operations, the attenuation state will stay constant while LE is kept low.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price,2 delivery,
andDrive,
to place
orders: AnalogMA
Devices,
For price,
delivery
andDevices
to place
orders:
Hittite
Microwave
Elizabeth
Chelmsford,
01824Inc.,
responsibility
is assumed
by Analog
for its use,
nor for any
infringements
of patents orCorporation,
other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373
Order
at www.hittite.com
Phone: On-line
781-329-4700
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
4
HMC792ALP4E
v00.0613
0.25 LSB GaAs MMIC 6-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
ATTENUATORS - DIGITAL - SMT
Timing Diagram (Latched Parallel Mode)
Parallel Mode
(Direct Parallel Mode & Latched Parallel Mode)
Parameter
Typ.
Min. serial period, tSCK
100 ns
Control set-up time, tCS
20 ns
Control hold-time, tCH
20 ns
LE setup-time, tLN
10 ns
Min. LE pulse width, tLEW
10 ns
Min LE pulse spacing, tLES
630 ns
Serial clock hold-time from LE, tCKN
10 ns
Hold Time, tPH.
0 ns
Latch Enable Minimum Width, tLEN
10 ns
Setup Time, tPS
2 ns
Note: The parallel mode is enabled when P/S is set to low.
Direct Parallel Mode - The attenuation state is changed by the control voltage inputs D0-D5 directly. The LE (Latch
Enable) must be at a logic high at all times to control the attenuator in this manner.
Latched Parallel Mode - The attenuation state is selected using the control voltage inputs D0-D5 and set while the
LE is in the Low state. The attenuator will not change state while LE is Low. Once all Control Voltage Inputs are at the
desired states the LE is pulsed. See timing diagram above for reference.
Power-Up States
PUP Truth Table
If LE is set to logic LOW at power-up, the logic state of
PUP1 and PUP2 determines the power-up state of the
part per PUP truth table. If the LE is set to logic HIGH
at power-up, the logic state of D0-D5 determines
the power-up state of the part per truth table. The
attenuator latches in the desired power-up state
approximately 200 ms after power-up.
Power-On Sequence
The ideal power-up sequence is: GND, Vdd, digital
inputs, RF inputs. The relative order of the digital
inputs are not important as long as they are powered
after Vdd / GND
Control Voltage Table
State
Vdd = +3V
Vdd = +5V
Low
0 to 0.5V @