ZHCSH81 December 2017 PGA302
PRODUCTION DATA.
The decimation filter output rate can be configured for 96 µs, 128 µs, 192 µs or 256 µs.
The output of the decimation filter is 16-bit signed 2's complement value. Some example decimation output codes for given differential voltages at the input of the sigma delta modulator as shown in Table 2.
SIGMA DELTA MODULATOR DIFFERENTIAL INPUT VOLTAGE | 16-BIT NOISE-FREE DECIMATOR OUTPUT |
---|---|
–2.5 V | –32768 (0x8000) |
–-1.25 V | –16384 (0xC000) |
0 V | 0 (0x0000) |
1.25 V | 16383 (0x3FFF) |
2.5 V | 32767 (0x7FFF) |