Three-channel sigma-delta analog-to-digital converter provides 24-bit conversion for high precision measurement applications. The device integrates a low noise instrumentation amplifier, three differential analog inputs, an internal clock oscillator, reference detection, burnout currents, and programmable digital outputs. It supports 4.17 Hz to 500 Hz output update rates with a 2.7 V to 5.25 V analog and digital supply range. Operation is specified from -40°C to +105°C in a 16-lead TSSOP package.
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| ADC Resolution | 24bit |
| Number of Differential Inputs | 3 |
| ADC Architecture | Sigma-Delta |
| Output Update Rate | 4.17 to 500Hz |
| RMS Noise at 4.17 Hz, Gain 64 | 27nV |
| RMS Noise at 16.7 Hz, Gain 64 | 65nV |
| Typical Supply Current | 380µA |
| Power-Down Current | 1 maxµA |
| Analog Supply Voltage | 2.7 to 5.25V |
| Digital Supply Voltage | 2.7 to 5.25V |
| Operating Temperature Range | -40 to 105°C |
| Integral Nonlinearity | ±15 maxppm of FSR |
| Offset Error | ±1 typµV |
| Gain Drift | ±1 typppm/°C |
| Power Supply Rejection | 100 mindB |
| Input Gain Range | 1 to 128 |
| External Reference Voltage Range | 0.1 to AVDDV |
| Serial Interface | 3-wire SPI, QSPI, MICROWIRE, DSP-compatible |
| Internal Clock Frequency | 64 ±3%kHz |
| Low-Side Power Switch Current | 30 maxmA |
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