AD8555: Digitally Programmable Sensor Signal Zero-Drift Amplifier
AD8555 is a zero-drift bridge sensor signal amplifier with digitally programmable gain and output offset. Designed to easily and accurately convert variable pressure sensor and strain bridge ...More
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AD8555: Digitally Programmable Sensor Signal Zero-Drift Amplifier
Product Description
AD8555 is a zero-drift bridge sensor signal amplifier with digitally programmable gain and output offset. Designed to easily and accurately convert variable pressure sensor and strain bridge outputs to a well-defined output voltage range, AD8555 will also accurately amplify many other differential or single ended sensor outputs. AD8555 utilizes ADI’s patented low noise auto-zero and DigiTrim® technologies to create an incredibly accurate and flexible signal processing solution in a very compact footprint.
In addition to extremely low input offset voltage and input offset voltage drift and very high DC and AC CMRR, the AD8555 also includes a pull-up current source at each analog input to allow open wire and shorted wire fault detection, and a low-pass filter function implemented via a single low-cost external capacitor. Output clamping set via an external reference voltage allows the AD8555 to drive lower voltage ADCs safely and accurately.
Features
- Very low offset voltage: 10 uV max over temperature
- Very low input offset voltage drift: 60 nV/°C max
- High CMRR: 96 dB
- Digitally programmable gain (span) and output offset voltage
- Open and short wire fault detection
- Low pass filtering
- Externally programmable output clamp voltage for driving low-voltage ADCs
- Very wide input and output ranges
- Single supply operation from 2.7 V to 5.5 V supplies
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| Part# | Description | Single/Dual Supply | Vcc-Vee | Gain Setting Method | Bandwidth G=10 (kHz typ) | Gain min. | Gain max. | Min CMRR @ 60 Hz Min Gain | Min CMRR @ 60Hz Max Gain | Vnoise RTI 1-10 Hz µVp-p | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AD522 | Diff Amp | Dual | 10V to 36V | Resistor | 3 | 1 | 1,000 | 75dB | 100dB | 4 | - |
| AD524 | Precision IA | Dual | 12V to 36V | Pin | 400 | 1 | 1,000 | 70dB | 110dB | 0.3 | $9.52 |
| AD526 | Software Programmable | Dual | 9V to 33V | Software | 350 | 1 | 16 | - | - | 3 | $6.39 |
| AD620 | General Purpose IA | Dual | 4.6V to 36V | Resistor | 800 | 1 | 10,000 | 73dB | 110dB | 0.28 | $3.18 |
| AD621 | Precision IA | Dual | 4.6V to 18V | Pin | 800 | 10 | 100 | 93dB | 110dB | 0.28 | $4.09 |
| AD622 | Low Cost IA | Dual | 5.2V to 36V | Resistor | 800 | 1 | 1,000 | 66dB | 103dB | 0.3 | $2.51 |
| AD623 | S.S R-R IA | Single/Dual | 2.7V to 12V | Resistor | 100 | 1 | 1,000 | 70dB | 105dB | 2 | $1.40 |
| AD624 | Precision IA | Dual | 12V to 36V | Pin | 400 | 1 | 1,000 | 70dB | 110dB | 0.3 | $11.93 |
| AD625 | Programmable Gain IA | Dual | 12V to 36V | Resistor | 400 | 1 | 10,000 | 70dB | 110dB | 0.3 | $8.78 |
| AD626 | Diff Amp | Single/Dual | 2.4V to 12V | Pin | 100 | 10 | 100 | 55dB | 55dB | 2 | $3.70 |
| AD627 | Micropower IA | Single/Dual | 2.2V to 36V | Resistor | 30 | 5 | 1,000 | 77dB | 77dB | 1.2 | $2.56 |
| AD628 | High CMV DA | Single/Dual | 4.5V to 36V | Pin, Resistor | 600 | 0.1 | 100 | 75dB | 75dB | 15 | $1.78 |