ZHCSIP5 August 2018 PGA305
PRODUCTION DATA.
The temperature signal path contains a decimation filter with an internal output rate of 128 µs.
The output of the decimation filter in the temperature signal path is 24-bit signed value. Some example decimation output codes for given differential voltages at the input of the sigma-delta modulator are shown in Table 3.
SIGMA-DELTA MODULATOR DIFFERENTIAL INPUT VOLTAGE | 24-BIT NOISE-FREE DECIMATOR OUTPUT |
---|---|
–2.5 V | –8 388 608 (0x800000) |
–1.25 V | –4 194 304 (0xC00000) |
0 V | 0 (0x000000) |
1.25 V | 4 194 303 (0x3FFFFF) |
2.5 V | 8 388 607 (0x7FFFFF) |
The nominal relationship between the device junction temperature and 24-bit T ADC Code for T GAIN = 5 V/V is shown in Equation 1.
where