A low-power sigma-delta analog-to-digital converter provides 20-bit resolution for low-frequency precision measurement. The device has one differential input, pin-programmable filter response, pin-programmable instrumentation-amplifier gain, and a read-only SPI-compatible 2-wire serial interface. It supports 10 SPS or 16.7 SPS update rates with simultaneous 50 Hz and 60 Hz rejection. The converter operates from a 2.7 V to 5.25 V supply across a -40 °C to +105 °C temperature range and is supplied in 14-lead SOIC and 16-lead TSSOP package options.
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| Resolution | 20bit |
| Number of channels | 1 |
| ADC architecture | Sigma-Delta |
| Input type | Differential |
| Data output interface | Serial SPI |
| Update rate | 10 or 16.7SPS |
| Maximum sample rate | 16.7SPS |
| Supply voltage | 2.7 to 5.25V |
| Typical supply current at gain 1 | 115µA |
| Typical supply current at gain 128 | 330µA |
| Typical power dissipation | 2.1mW |
| Operating temperature range | -40 to 105°C |
| Package options | 14-lead SOIC; 16-lead TSSOP |
| Digital filter rejection | Simultaneous 50 Hz/60 Hz rejection |
| Clock oscillator | Internal |
| Bridge power-down switch | Internal |
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