SBASAG2 December 2023 ADS9227
ADVMIX
The ADS922x supports a ±3.2-V differential input range. The device outputs 16-bit conversion data in either straight-binary or binary 2's-complement formats. As shown in Table 6-1, the format for the output codes is the same across all analog channels. The format for the output codes can be configured using the DATA_FORMAT field in register address 0x0D. The least significant bit (LSB) for the ADC is given by 1 LSB = 6.4 V / 216.
INPUT VOLTAGE | DESCRIPTION | ADC OUTPUT IN 2's-COMPLEMENT FORMAT | ADC OUTPUT IN STRAIGHT-BINARY FORMAT |
---|---|---|---|
≤ –3.2 V + 1 LSB | Negative full-scale code | 0x80000x80000 | 0x00000x00000 |
0 V + 1 LSB | Mid-code | 0x00000x00000 | 0x7FFF0x1FFFF |
≥ 3.2 V – 1 LSB | Positive full-scale code | 0x7FFF0x1FFFF | 0xFFFF0x3FFFF |