HMC681ALP5E
v00.0113
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN
AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
Typical Applications
Features
The HMC681ALP5E is ideal for:
+13.5 dB to +45 dB Gain Control in 0.5 dB Steps
• IF & RF Applications
High Output IP3: +36 dBm
• Cellular/3G Infrastructure
±0.25 dB Typical Gain Step Error
• WiBro / WiMAX / 4G
Single +5V Supply
• Microwave Radio & VSAT
32 Lead 5x5 mm SMT Package: 25 mm2
• Test Equipment and Sensors
Functional Diagram
The HMC681ALP5E is a digitally controlled variable
gain amplifier which operates from DC to 1 GHz,
and can be programmed to provide anywhere from
13.5 dB, to 45 dB of gain, in 0.5 dB steps. The
HMC681ALP5E delivers noise figure of 2.8 dB in its
maximum gain state, with output IP3 of up to +36
dBm in any state. This serially controlled digital VGA
incorporates off chip AC ground capacitors for near
DC operation, making it suitable for a wide variety of
RF and IF applications. The HMC681ALP5E is housed
in a RoHS compliant 5x5 mm QFN leadless package,
and provides the user with a highly integrated solution.
This functionality is also available with parallel control
as the HMC626ALP5E.
Electrical Specifications, TA = +25° C, Vdd = Vs= P/S= +5V
Parameter
Gain (Maximum Gain State)
Min.
Typ.
Max.
Min.
50 - 350
Max.
45
30
Units
MHz
dB
31.5
31.5
dB
Input Return Loss
25
30
dB
Output Return Loss
20
17
dB
Gain Setting Accuracy:
(Referenced to Maximum Gain State)
All Gain States
40
Typ.
350 - 1000
40
Gain Control Range
± (0.15 + 3% of Relative Gain Setting) Max. ± (0.15 + 3% of Relative Gain Setting) Max.
dB
Output Power for 1 dB Compression
20
19
dBm
Output Third Order Intercept Point
(Two-Tone Output Power= 5 dBm Each Tone)
38
36
dBm
Noise Figure
2.7
2.8
dB
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
60
120
60
120
ns
ns
Total Supply Current (Idd + 2*Is)
1
General Description
184.5
225
184.5
225
mA
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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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
HMC681ALP5E
v00.0113
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN
AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
50 to 350 MHz Tuning
(Referenced to Maximum Gain State)
(Only Major States are Shown)
Gain vs. Frequency
0
50
45
-5
8 dB
RELATIVE GAIN (dB)
40
GAIN (dB)
35
30
25
20
15
-10
16 dB
-15
-20
-25
31.5 dB
10
-30
5
0
0.05
0.1
0.15
0.2
0.25
0.3
-35
0.05
0.35
0.1
0.15
FREQUENCY (GHz)
+25C
+85C
0.25
0.3
0.35
0.3
0.35
-40C
Input Return Loss
Output Return Loss
(Only Major States are Shown)
(Only Major States are Shown)
0
0
-5
-5
-10
-10
RETURN LOSS (dB)
RETURN LOSS (dB)
0.2
FREQUENCY (GHz)
-15
-20
-25
-30
31.5dB
-15
-20
-25
-30
IL
-35
-40
0.05
-35
31.5 dB
0.1
0.15
0.2
0.25
0.3
-40
0.05
0.35
0.1
0.15
FREQUENCY (GHz)
Bit Error vs. Frequency
2
2
1.5
1.5
1
BIT ERROR (dB)
BIT ERROR (dB)
1
8, 16 dB
0.5
0
-0.5
50 MHz
0.5
0
-0.5
-1
-1
-1.5
-1.5
-2
0.05
0.25
Bit Error vs. Relative Gain Setting
(Only Major States are Shown)
31.5 dB
0.2
FREQUENCY (GHz)
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
Relative Gain Setting
75, 100, 125, 150, 250, 350MHz
-2
0.1
0.15
0.2
0.25
FREQUENCY (GHz)
0.3
0.35
0
4
8
12
16
20
24
28
32
RELATIVE GAIN SETTING (dB)
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
HMC681ALP5E
v00.0113
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN
AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
50 to 350 MHz Tuning
3
Step Error vs. Frequency
(Only Major States are Shown)
(Only Major States are Shown)
1
60
0.6
40
STEP ERROR (dB)
RELATIVE PHASE (deg)
0.8
8 dB
31.5 dB
20
0
0.5 - 16 dB
16 dB
-20
0.1
0.4
IL
0.2
0
-0.2
-0.4
16 dB
-0.6
8 dB
-0.8
31.5 dB
-40
0.05
0.15
0.2
0.25
0.3
-1
0.05
0.35
0.1
0.15
0.2
0.25
0.3
0.35
FREQUENCY (GHz)
FREQUENCY (GHz)
Output P1dB
(Major States shown are IL through 16 dB))
Output IP3 @ 5 dBm Output Power per
Tone (Major States shown are IL through 16 dB)
45
24
43
22
IL
IP3 (dBm)
P1dB (dBm)
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
Relative Phase vs. Frequency
20
16 dB
41
39
18
37
16 dB
16
0.05
0.1
0.15
0.2
0.25
FREQUENCY (GHz)
0.3
0.35
35
0.05
0.1
0.15
0.2
0.25
0.3
0.35
FREQUENCY (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
HMC681ALP5E
v00.0113
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN
AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
350 to 1000 MHz Tuning
(Referenced to Maximum Gain State)
(Only Major States are Shown)
Gain vs. Frequency
0
50
45
-5
8 dB
RELATIVE GAIN (dB)
40
GAIN (dB)
35
30
25
20
15
-10
16 dB
-15
-20
-25
31.5 dB
10
-30
5
0
0.2
0.4
0.6
0.8
-35
0.2
1
0.4
FREQUENCY (GHz)
+25 C
0.6
0.8
1
0.8
1
FREQUENCY (GHz)
+85 C
-40 C
Input Return Loss
Output Return Loss
(Only Major States are Shown)
(Only Major States are Shown)
0
0
-5
31.5 dB
RETURN LOSS (dB)
RETURN LOSS (dB)
-10
IL
-20
-30
31.5 dB
-10
-15
-20
-25
I.L
-30
-40
-35
-50
0.2
0.4
0.6
0.8
-40
0.2
1
0.4
FREQUENCY (GHz)
Bit Error vs. Frequency
Bit Error vs. Relative Gain Setting
(Only Major States are Shown)
2
2
1.5
1.5
31.5 dB
16 dB
600, 700, 800, 900, 1000MHz
1
BIT ERROR (dB)
BIT ERROR (dB)
1
8 dB
0.5
0.6
FREQUENCY (GHz)
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
Relative Gain Setting
0
-0.5
0.5
0
-0.5
-1
-1
-1.5
-1.5
-2
350 MHz
-2
0.2
0.4
0.6
FREQUENCY (GHz)
0.8
1
0
4
8
12
16
20
24
28
32
RELATIVE GAIN SETTING (dB)
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
HMC681ALP5E
v00.0113
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN
AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
350 to 1000 MHz Tuning
Step Error vs. Frequency
(Only Major States are Shown)
(Only Major States are Shown)
1
60
0.6
40
STEP ERROR (dB)
RELATIVE PHASE (deg)
0.8
31.5 dB
16 dB
20
0
0.5 - 8 dB
0.5, 31.5 dB
0.4
0.2
0
-0.2
-0.4
1, 2, 4 dB
8 dB
-0.6
-20
-0.8
-40
0.2
0.4
0.6
0.8
-1
0.2
1
0.4
0.6
0.8
1
FREQUENCY (GHz)
FREQUENCY (GHz)
Output P1dB
Output IP3 @ 5 dBm Output Power per
Tone (Major States shown are IL through 16 dB)
(Major States shown are IL through 16 dB)
24
50
22
40
IP3 (dBm)
IL
P1dB (dBm)
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
Relative Phase vs. Frequency
20
18
30
16 dB
20
16 dB
16
0.2
0.4
0.6
0.8
1
10
0.2
0.4
FREQUENCY (GHz)
0.6
0.8
1
FREQUENCY (GHz)
Power-Up States
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. The attenuator latches
in the desired power-up state approximately 200 ms
after power-up.
Power-On Sequence
PUP Truth Table
LE
PUP1
PUP2
Relative Gain Setting
0
0
0
-31.5
0
1
0
-24
0
0
1
-16
0
1
1
Insertion Loss
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
5
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
HMC681ALP5E
v00.0113
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN
AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
The HMC681ALP5E contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). It 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 were 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.
For all modes of operations, gain will remain constant while LE is kept low.
Truth Table
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
Serial Word
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
Serial Control Interface
Relative
Gain
Setting
B5
16 dB
B4
8dB
B3
4 dB
B2
2 dB
B1
1 dB
B0
0.5 dB
High
High
High
High
High
High
Reference
0 dB
High
High
High
High
High
Low
-0.5 dB
High
High
High
High
Low
High
-1 dB
High
High
High
Low
High
High
-2 dB
High
High
Low
High
High
High
-4 dB
High
Low
High
High
High
High
-8 dB
Low
High
High
High
High
High
-16 dB
Low
Low
Low
Low
Low
Low
-31.5 dB
Any combination of the above states will provide a relative gain
setting approximately equal to the sum of the bits selected.
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
6
HMC681ALP5E
v00.0113
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN
AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
Absolute Maximum Ratings
7
Bias Voltage
Vdd (V)
Idd (Typ.) (mA)
+5
2.5
RF Input Power [1] (At Max Gain
Setting)
-10.5 dBm (T = +85 °C)
Digital Inputs (Reset, Shift Clock,
Latch Enable & Serial Input)
-0.5 to Vdd +0.5V
Bias Voltage (Vdd)
5.5V
Collector Bias Voltage (Vcc)
5.5V
Channel/Junction Temperature
150 °C
Continuous Pdiss (T = 85 °C)
(derate 18.2 mW/°C above 85 °C) [2]
State
Vdd = +3V
Vdd = +5V
1.18 W
Low
0 to 0.5V @