Isolation Amplifiers
Isolation Amplifiers provide power supply designers with a higher performing, single chip alternative to isolation techniques based on optocouplers and shunt regulators. Analog Devices ADuM3190 and ADuM4190 isolated error amplifiers have a 400 kHz bandwidth, with 0.5% typical initial accuracy at 25°C and 1% total accuracy over the extended temperature range of –40˚C to +125˚C. This provides manufacturers of ac-to-dc and dc-to-dc power supplies with a significant upgrade in speed and operating temperature range, as well as a 5× improvement in transient response.
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Frequently Asked Questions
- How does the input offset voltage (VOS) of an amplifier affect my circuit?
- 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?
- What does single-supply amplifer really mean?
- Why can't I get my amplifier to go to my full-scale output voltage?
- What is a rail-to-rail amplifier?
- How does input current noise affect my amplifier circuit?
- Why is my amplifier oscillating?
- What is meant by the noise gain of an amplifier?
- My reference voltage changes when I connect it to the amplifier's input?
- What is the output headroom or voltage range of an amplifier and how is it determined?
- What are op amp input and output common-mode and differential voltage ranges and how are they determined?
- What is the small signal bandwidth of an amplifier?
- How does the open-loop gain of an amplifier affect my circuit?
- Why does the output signal of my amplifier look like a triangle, when I have a sine wave input?
- What is unity-gain bandwidth?
- What is amplifier RF rectification?
- Why is my output signal clipping?
- Why is my input signal clipping?
- I have a large unexplained offset in my circuit. What can be causing it?
- How does the input voltage noise of an amplifier affect my circuit?
- What is input common-mode voltage range (CMVR)?
- Why doesn't my amplifier output go to zero when I ground the input?
- Can I exceed the parameters specified in the absolute maximum ratings table?
Isolation Amplifiers
| SortOrder | Part# | # of Channels | BW -3 dB (typ) (Hz) | Insulation Rating (V rms) | Gain (min) (V/V) | Gain (max) (V/V) | Nonlinearity % (typ) (%) | Temp Range | Vs span (max) (V) | Vs span (min) (V) | Vs Type | US Price 1000 to 4999 ($ US) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ADUM4190 | 1 | 400k | 5k | 0.83 | 2.7 | 1 | -55 to 125°C | 20 | 3 | Single | $1.20 (ADUM4190ARIZ-RL) |
| 2 | ADUM3190 | 1 | 400k | 2.5k | 0.9 | 2.86 | 1 | -40 to 125°C | 20 | 3 | Single | $1.04 (ADUM3190ARQZ-RL7) |
| 3 | AD215 | 2 | 120k | 1500 | 1 | 100 | 0.01 | -40 to 85°C | 34 | 28.5 | Dual | $48.94 (AD215AY) |
| 4 | AD208 | 2 | 4k | 1500 | 1 | 1000 | 0.0125 | -40 to 85°C | - | - | Single | $82.50 (AD208AY) |
| 5 | AD203 | 2 | 10k | 1500 | 1 | 10 | 0.025 | -55 to 125°C | 16 | 12 | Single | $105.40 (AD203SN) |
| 6 | AD210 | 3 | 20k | 2500 | 1 | 100 | 0.012 | -25 to 85°C | 16.5 | 13.5 | Single | $52.63 (AD210JN) |
| 7 | AD204 | 2 | 5k | 1500 | 1 | 100 | 0.025 | 0 to 70°C | 16.5 | 13.5 | Single | $30.34 (AD204JN) |
| 8 | AD202 | 2 | 5k | 1500 | 1 | 100 | 0.025 | 0 to 70°C | 16.5 | 13.5 | Single | $33.73 (AD202JY) |
