Variable Gain Amplifiers
Variable Gain Amplifiers
Part Number
Frequency
Range,
–3 dB
(MHz)
Linearin-dB
Linear
DC to 90
40
—
DC to 40
20 to 40
—
DC to 40
20 to 40
—
235
20
AD8330
DC to 150
AD8331
Single
Dual
Quad
Gain Scaling1
Gain
Range
(dB)
Gain
Accuracy Preamp
(dB)
EN
nV/√Hz
IN
pA/√Hz
Output Noise, Noise
Figure
Max Gain
(dB)
(nV/√Hz)
ZIN (𝛀)
ZOUT (𝛀)
Output
P1dB2
(dBm)
Output
IP32
(dBm)
SE3
DIFF3
SE3
DIFF3
Supply
Voltage
(V)
Power/
Channel
(mW)
PowerDown
Comments
Analog Control
±0.5
No
1.3
—
46
8.8
19
15 (40 MHz)
100
—
2
—
±4.75 to
±6.3
125
No
Absolute gain settable via pin strap or external resistor;
BW gets reduced for higher gains
±0.3
Yes
1.8
3
200
8.4
15
35 (10 MHz)
>1000
—
2
—
±5
220
Yes
Ultralow noise preamp
±0.2
No
1.8
2.7
94
8.4
15
33 (10 MHz)
175
350
Like AD604 but without preamp
±0.25
Yes
2.3
2
72
9
30
27 (10 MHz)
7900
No
5
—
62
—
—
27 (10 MHz)
—
—
–11 to +31,
9 to 51
0 to 48,
6 to 54
–14 to +34,
0 to 48
0 to 24
33.3
2
–30 to +70
±0.5
DC to 120
50
—
AD8334
DC to 100
50
—
AD8335
DC to 85
20
—
AD603
AD604
AD605
AD8264
1000
2
—
5
90
Yes
3.5
<1
±2.5 to ±5
No
Quad dc-coupled
—
150
2.7 to 6
140
54 @
VS = 2.7 V
Yes
Differential input/output
AD8336
DC to 100
50
—
AD8337
AD8338
AD8340
DC to 280
DC to 20
700 to 1000
1.5 GHz to
2.4 GHz
19.7
80
—
—
2
–5 to +43,
7 to 55
–5 to +43,
7 to 55
–10 to +38,
–2 to +46
–14 to +46,
0 to 60
0 to 24
0 to 80
–2 to –32
—
2
–4 to –34
±0.25
No
—
—
–151 dBm/Hz
—
8.5
17.5 (1.9 GHz)
36
72
25
50
4.75 to 5.25
125 mA
Yes
Vector modulator used as a VGA; can also change phase
DC to 500
0.25
—
4.5 to 20.5
—
No
—
—
—
10.5
7
36
—
200
—
30
5
300
Yes
Dual fine 0.25 dB digital gain trim amplifier for
baseband signals
Square law detector included for AGC applications;
VGA or AGC mode
Single-ended input/output, VGA/AGC operation
AD8332
AD8341
AD8366
±0.3
Yes
0.8
2.5
170
4.2
—
32 (10 MHz)
Prog
—
—
2
4.5 to 5.5
125
Yes
Single-ended input/differential output
±0.3
Yes
0.8
2.5
150
4.2
—
32 (10 MHz)
Prog
—
—
—
4.5 to 5.5
145
Yes
Single-ended input/differential output
±0.2
Yes
1.3
2.4
80
7
18
31 (10 MHz)
—
—
—
1.2
4.5 to 5.5
95
Yes
Single-ended input/differential output; individual gain
control per each channel
±0.2
Yes
3.0
3
600
—
11
—
—
—
2
—
±3 to ±12
150
No
Single-ended input/output, power save
±0.25
±0.3
±0.25
Yes
No
No
2.2
4.5
—
4.8
—
—
34
—
–149 dBm/Hz
14
—
—
—
11
28 (45 MHz)
—
24 (880 MHz)
—
—
20
—
1000
40
—
<1
25
—
<1
50
4.5 to 10
3.0 to 5.5
4.75 to 5.25
78
9 mW
130 mA
No
No
Yes
Single-ended input/output
Low power VGA with built-in AGC and offset null
Vector modulator used as a VGA; can also change phase
AD8367
DC to 500
45
—
–2.5 to +42.5
±0.2
No
1.9
—
—
6.2
8
27.5 (70 MHz)
200
—
50
—
2.7 to 5.5
110
Yes
AD8368
LF to 800
1 MHz to
3 GHz
1 MHz to
1.2 GHz
34
—
–12 to +22
±0.4
No
1.3
—
–143 dBm/Hz
9
16
33.7 (70 MHz)
50
—
50
—
4.5 to 5.5
60 mA
Yes
22
—
–34 to +22
±1.5
Yes
1.3
—
–150 dBm/Hz
7.8
22
31 (900 MHz)
25
50
25
50
4.75 to 6
1200
Yes
RF/IF voltage controlled amplifier/attenuator
Yes
—
–15 to +15
0.09
No
—
—
–150 dBm/Hz
9
—
32
50
50
20
20
5
1200
Yes
Continuous analog controlled RF VGA
ADL5336
LF to 1 GHz
Yes
—
–15 to +20
±0.2
No
—
—
—
6.8
14
28
—
200
—
100
5
40 mA
Yes
ADL5390
20 MHz to
2.4 GHz
DC to
2.0 GHz
250 MHz to
2.4 GHz
—
50
4.75 to
5.25
135 mA
Yes
ADRF6510
ADRF6516
Cascadable IF VGAs with programmable
rms detectors
Vector modulator used as a VGA; can also
change phase
Multiplier used as a VGA with dc operation and very fast
analog control
Includes two independent 30 dB, 1 dB step attenuators
with output amplifer
Dual analog VGA with digitally controlled 6-pole low
distortion filters
31 MHz, dual programmable filters and variable
gain amplifiers
ADL5330
ADL5331
ADL5391
ADL5592
3.5
–27 to +5
±0.25
No
4.7
—
–149 dBm/Hz
21
11
24 (380 MHz)
250
500
25
—
1
0 to –42
±1
No
4.7
—
–133 dBm/Hz
40
15
26 (50 MHz)
250
500
38
75
4.5 to 5.5
135 mA
Yes
1
—
60
—
No
—
—
—
4.8
—
29
—
50
—
50
5
945
Yes
1 to 30
Yes
—
–5 to +45
—
Yes
—
—
–130 dBV/Hz
—
—
29
—
400
—
10
5
660
Yes
1 to 31
Yes
—
–5 to +45
0.2
Yes
—
—
–141 dBV/Hz
—
—
—
—
1600
—
30
3.3
180 mA
Yes
Gain scaling—analog control: dB/V and V/V; digital control: dB/LSB and V/V/LSB.
2
For all AD832x and ADA432x parts, the reference impedance for powers in dBm is 75 Ω; for all other parts, it is 50 Ω.
3
SE: single-ended; DIFF: differential.
4
75 Ω ZOUT also during power-down. All specifications for 75 Ω load resistance; however, the parts can be used with other load impedances.
1
For more information on ADI amplifiers, visit www.analog.com/amps.
Part Number
Single
Dual
Frequency
Range,
–3 dB
(MHz)
Quad
Digital Control
AD8260
230
0.001 to
600
0.001 to
700
1 to 130
630
700
700
AD8369
AD8370
AD8372
Linearin-dB
Gain
Range
(dB)
Linear
Gain
Accuracy Preamp
(dB)
EN
nV/√Hz
IN
pA/√Hz
Output Noise, Noise
Figure
Max Gain
(dB)
(nV/√Hz)
Output
P1dB2
(dBm)
ZIN (𝛀)
Output
IP32
(dBm)
SE
3
ZOUT (𝛀)
DIFF
SE
3
3
DIFF
3
Supply
Voltage
(V)
Power/
Channel
(mW)
PowerDown
Comments
—
—
30
±0.15 typ
Yes
2.4
—
38
10.2
1.9
27
—
—
—
<3
3.3 to 10
93
Yes
45
—
–5 to +40
±0.5
No
2
—
—
7
3
19.5 (70 MHz)
—
200
—
200
3.0 to 5.5
170
Yes
4-bit interface 3 dB step
—
28
–11 to +17,
6 to 34
–9 to +32
–4 to +20
–4 to +20
–11.5 to +20
±0.5
Yes
2.1
—
—
7.4
16
31 (70 MHz)
—
200
—
100
2.7 to 5.5
410
Yes
7-bit interface
±0.2
±0.2
±0.2
±0.03
No
No
No
No
—
1.9
2
—
—
—
—
—
—
—
—
—
7.9
8.3
8.7
7.5
18
22
21.4
19.8
35 (65 MHz)
51 (70 MHz)
50 (70 MHz)
51 (140 MHz)
—
—
—
—
150
150
150
150
— 3500
— 16,000
— 16,000
— 150
4.5 to 5.5
4.5 to 5.5
4.5 to 5.5
5
106
125 mA
250 mA
110 mA
Yes
Yes
Yes
Yes
700
Yes
—
–11.5 to +20
±0.03
No
—
—
—
7.5
19.5
50 (140 MHz)
—
150
—
150
5
Yes
100 MHz to
4 GHz
Yes
—
–13.5 to +18
±0.2
No
—
—
—
2.9
19.5
41.0
50
—
50
—
5
93 mA
No
Integrated gain block and 0.5 dB digital step attenuator
Yes
—
3.5 to 35
±0.2
No
—
—
—
2.9
26
41.1
50
—
50
—
5
175 mA
No
Integrated gain block, 0.5 dB digital step attenuator, and
1/4 W driver amp
1
1
1
—
—
—
–25.5 to +33.5
–29.45 to +30
–27 to +32
±1.0
±0.3
±1.0
Yes
Yes
Yes
1.3
—
0.8
—
—
—
157
—
230
15.5
13.8
21
21
31
21.3
—
—
41
550
800
320
1100
1600
640
—
—
—
754
754
754
3.3
5
5
207
665
260 mA
Yes
Yes
Yes
3 V low cost line driver
5 V low cost CATV line driver
DOCSIS 3.0-compatible line driver
AD8376
ADL5201
ADL5202
ADL5243
Digitally Controlled Line Drivers
AD8324
AD8325
ADA4320-1
100
100
140
41
20
20
Yes
Includes high current driver
Serial 8-bit bidirectional SPI control interface
Differential input/output
Dual-channel version of AD8375
Wide dynamic range, high speed, digitally controlled IF VGA
Wide dynamic range, high speed, digitally controlled
dual IF VGA
AD8375
ADL5240
Gain Scaling1
—
—
—
Gain scaling—analog control: dB/V and V/V; digital control: dB/LSB and V/V/LSB.
For all AD832x and ADA432x parts, the reference impedance for powers in dBm is 75 Ω; for all other parts, it is 50 Ω.
SE: single-ended; DIFF: differential.
4
75 Ω ZOUT also during power-down. All specifications for 75 Ω load resistance; however, the parts can be used with other load impedances.
1
2
3
OUTPUT
GAIN CONTROL
VOLTAGE
LNA-VGA-ADC ARRAY (UP TO 256 CHANNELS)
+
AAF
T/R
SWITCHER
LNA
VGA
ADC
Ultrasound (TGC signal chain).
PHOTOMULTIPLIER TUBE
PHOTONS
Applications
60
VGAIN = 1V
50
50
AD8337
HILO = HI
40
40
30
30
GAIN (dB)
100𝛀 TO 200𝛀
PET scanner signal chain.
Communications application.
60
RECOVERED ISOTOPE
DECAY WAVEFORM
PMT ANODE
ADC
DETECTOR
–
Automatic gain control (AGC) circuit.
GAMMA
RAYS
ADC
REFERENCE
GAIN (dB)
SCINTILLATION
CRYSTALS
RF AMP
INPUT
ADI INTEGRATED SOLUTION
HV MUX AND
T/R SWITCHES
DUAL VGA OR DGA
CONTROLLABLE
GAIN ELEMENT (VGA)
ISOLATION
DAC
I/Q DEMOD
HV
AMP
20
10
0
0.2
0.4
0.6
0.8
VGAIN (V)
VGA key features.
©2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Printed in the U.S.A. ST02878-.5-7/12(F)
1.0
1.1
VGAIN = 0.6V
VGAIN = 0.4V
Industrial
• Ultrasound
• Film thickness
gauging
Communications
20
–10
100k
Medical
• Positron
emission
tomography
VGAIN = 0.2V
• AGC circuits in
receivers
VGAIN = 0V
0
ASCENDING GAIN MODE
DESCENDING GAIN MODE
(WHERE AVAILABLE)
–10
VGAIN = 0.8V
10
HILO = LO
0
HI GAIN
MODE
1M
10M
FREQUENCY (Hz)
100M
1G
• Weld integrity
• Sonar—depth
sounders
Military
• Radar
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