Analog Devices' AD7173-8 is a fast-settling, highly-accurate, low-power, 8-/16-channel, multiplexed ADC for low-bandwidth input signals with integrated input buffers. It features integrated precision, 2.5 V, low-drift (3.5 ppm/°C), band gap reference and integrated oscillator. Eight flexible setups with configurability for output data rate, digital filter mode, offset/gain error correction, reference selection, and buffer enables.
Sinc5 + sinc1 filter maximizes channel scan rate, and sinc3 filter maximizes resolution and enhanced 50 Hz/60 Hz rejection, with four selectable options to maximize rejection. Integrated diagnostic features, including CRC, register checksum, temperature sensor, crosspoint multiplexer, burnout currents, and GPIOs/GPOs.
| Features |
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- Low power, 8-/16-channel, highly-integrated multiplexed analog-to-digital converter (ADC)
- Integration:
- Precision analog input buffers and reference input buffers
- 2.5 V precision reference
- (3.5 ppm/°C)
- Cross-point multiplexer (enable system diagnostic)
- 8-full-differential or 16 single-ended channels
- GPIO and GPO pins with automatic external mux control
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- Fast and flexible output rate:
- Channel scan data rate: 6.21 kSPS/channel (161 μs settling)
- Performance specifications:
- 17.5 noise-free bits at 31.25 kSPS
- 23 noise-free bits at 1.25 SPS
- INL: ±3 ppm/FSR
- 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling
- Clock oscillator
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| Applications |
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- Process control: PLC/DCS modules
- Voltage, current, temperature, and pressure measurement
- Flow meters
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- Medical and scientific multichannel instrumentation
- Seismic instrumentation
- Chemical analysis instrumentation: chromatography
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