Pin-programmable analog front end integrates a low-noise 24-bit sigma-delta ADC and programmable gain amplifier for precision bridge-sensor measurements. The device provides two differential analog inputs, gain settings of 1, 8, 64, and 128, and output data rates of 10 Hz, 50 Hz, 60 Hz, and 120 Hz. It operates from a 3 V to 5.25 V supply, draws 4.35 mA, and supports internal or external clock operation. The serial interface is 2-wire and compatible with SPI, QSPI, and MICROWIRE, and the operating temperature range is -40°C to +105°C.
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| ADC Resolution | 24bit |
| ADC Architecture | Sigma-delta |
| Analog Inputs | 2 differential |
| Output Data Rate | 10, 50, 60, 120Hz |
| PGA Gain | 1, 8, 64, 128V/V |
| RMS Noise | 15 at 10 Hz, gain = 128nV |
| Noise-Free Resolution | Up to 21.5 at gain = 1bit |
| Offset Drift | 5nV/°C |
| Gain Drift | 1ppm/°C |
| Supply Voltage | 3 to 5.25V |
| Supply Current | 4.35mA |
| Operating Temperature | -40 to +105°C |
| Clock Source | Internal or external |
| Line Rejection | Simultaneous 50/60Hz |
| Interface | 2-wire serial; SPI, QSPI, and MICROWIRE compatible |
| Package | 24-lead TSSOP |
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