Difference Amplifiers
A difference amplifier is a special purpose amplifier designed to measure differential signals, otherwise known as a subtractor. A key feature of a difference amplifier is its ability to remove unwanted common mode signals, known as common mode rejection (CMR). Unlike most types of amplifiers, difference amplifiers are typically able to measure voltages beyond the supply rails, and are used in applications where large dc or ac common-mode voltages are present. They are ideal for current and voltage monitoring. Analog Devices offers a range of difference amplifiers, optimized for low distortion, low power, or high voltage performance.
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Frequently Asked Question
- How does the input bias current of an amplifier affect my circuit?
- What is the full power bandwidth of an amplifier?
- I'm applying a dc voltage to the input of my amplifier, but I'm getting an oscillating signal out. What can be causing this?
- How does input current noise affect my amplifier circuit?
- Why is my amplifier oscillating?
Difference Amplifiers
| SortOrder | Part# | # of Amps | Common Mode In (min) (V) | Common Mode In (max) (V) | Input Beyond Supply | Gain (min) (V/V) | Gain (max) (V/V) | BW - low gain (typ) (Hz) | Slew Rate (typ) (V/us) | Iq/Amp (max) (A) | Vs span (min) (V) | Vs span (max) (V) | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | LT1997-1 | 1 | -300m | 80 | Yes | 0.141 | 80 | 650k | 4 | 400µ | 3.3 | 50 | $3.14 (LT1997IMS-1#PBF) |
| 2 | LT1997-2 | 1 | -255 | 255 | Yes | 0.0455 | 0.55 | 1M | 750m | 400µ | 3.3 | 50 | $3.14 (LT1997IMS-2#PBF) |
| 3 | LT1997-3 | 1 | -160 | 160 | Yes | 0.077 | 13 | 1.1M | 750m | 400µ | 3.3 | 50 | $3.14 (LT1997IMS-3#PBF) |
| 4 | LT6376 | 1 | -230 | 230 | Yes | 10 | 10 | 160k | 4.1 | 400µ | 3.3 | 50 | $3.20 (LT6376IMS#PBF) |
| 5 | LT6375 | 1 | -270 | 270 | Yes | 1 | 1 | 375k | 2.4 | 400µ | 3.3 | 50 | $2.95 (LT6375IMS#PBF) |
| 6 | AD8479 | 1 | -600 | 600 | Yes | 1 | 1 | 310k | 8.8 | 650µ | 5 | 36 | $2.81 (AD8479ARZ) |
| 7 | ADA4830-2 | 2 | -10 | 9.5 | Yes | 0.5 | 0.5 | 84M | 300 | 10m | 2.9 | 5.5 | $0.85 (ADA4830-2BCPZ-R7) |
| 8 | ADA4830-1 | 1 | -10 | 9.5 | Yes | 0.5 | 0.5 | 84M | 300 | 10m | 2.9 | 5.5 | $0.61 (ADA4830-1BCPZ-R7) |
| 9 | AD8208 | 1 | -2 | 45 | Yes | 20 | 20 | 70k | 1 | 3m | 4.5 | 5.5 | $1.67 (AD8208WBRMZ) |
| 10 | AD8279 | 2 | -45.3 | 40.5 | Yes | 0.5 | 2 | 1M | 1.3 | 350µ | 2 | 36 | $1.60 (AD8279ARZ) |
| 11 | AD8209 | 1 | -2 | 45 | Yes | 14 | 14 | 80k | 1 | 3m | 4.5 | 5.5 | $1.67 (AD8209WBRMZ) |
| 12 | AD8278 | 1 | -45.3 | 40.5 | Yes | 0.5 | 2 | 1M | 1.4 | 200µ | 2 | 36 | $0.95 (AD8278ARMZ) |
| 13 | AD8277 | 2 | -30.2 | 27 | Yes | 1 | 1 | 550k | 1.1 | 200µ | 2 | 36 | $1.60 (AD8277ARZ) |
| 14 | AD8276 | 1 | -30.2 | 27 | Yes | 1 | 1 | 550k | 1.1 | 200µ | 2 | 36 | $0.95 (AD8276ARMZ) |
| 15 | AD8271 | 1 | -15.4 | 15.4 | Slightly | 0.5 | 2 | 20M | 30 | 2.6m | 5 | 36 | $1.25 (AD8271ARMZ) |
| 16 | AD8275 | 1 | -12.3 | 12 | Yes | 0.2 | 0.2 | 15M | 25 | 2.3m | 3.3 | 15 | $1.60 (AD8275ARMZ) |
| 17 | AD8274 | 1 | -40.5 | 40.5 | Yes | 0.5 | 2 | 20M | - | 2.6m | 5 | 36 | $1.05 (AD8274ARMZ) |
| 18 | AD8273 | 2 | -40.5 | 40.5 | Yes | 0.5 | 3 | 20M | 20 | 2.5m | 5 | 36 | $1.60 (AD8273ARZ) |
| 19 | AD8270 | 2 | -15.4 | 15.4 | Slightly | 0.5 | 2 | 20M | 30 | 2.5m | 5 | 36 | $1.91 (AD8270ACPZ-R7) |
| 20 | LT1996 | 1 | -60 | 60 | Yes | 9 | 117 | 560k | 120m | 110µ | 2.7 | 36 | $1.39 (LT1996CMS#PBF) |
| 21 | LT1995 | 1 | -15 | 15 | Slightly | 1 | 7 | 32M | 1k | 8.5m | 5 | 30 | $1.89 (LT1995CMS#PBF) |
| 22 | LT1991 | 1 | -18 | 18 | Yes | 1 | 13 | 560k | 120m | 110µ | 2.4 | 40 | $1.39 (LT1991CMS#PBF) |
| 23 | LT1990-10 | 1 | -250 | 250 | No | 10 | 10 | 100k | 400m | 180µ | 2.4 | 36 | $1.62 (LT1990IMS8-10#PBF) |
| 24 | LT1990 | 1 | -250 | 250 | Yes | 1 | 10 | 100k | 550m | 180µ | 2.4 | 36 | $1.35 (LT1990CS8#PBF) |
| 25 | AD628 | 1 | -120 | 120 | Yes | 0.1 | 100 | 600k | 300m | 1.6m | 4.5 | 36 | $2.00 (AD628ARMZ) |
| 26 | AD629 | 1 | -270 | 270 | Yes | 1 | 1 | 500k | 2.1 | 1m | 5 | 36 | $3.19 (AD629ARZ) |
| 27 | AD626 | 1 | -24 | 24 | Yes | 10 | 100 | 100k | 220m | 2m | 2.4 | 10 | $4.34 (AD626ARZ) |
| 28 | AMP03 | 1 | -20 | 20 | Yes | 1 | 1 | 3M | 9.5 | 3.5m | 10 | 36 | $3.26 (AMP03GSZ) |
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