SBAS683B August 2014 – May 2020 ADS1120-Q1
PRODUCTION DATA.
A ΔΣ modulator is used in the ADS1120-Q1 to convert the analog input voltage into a pulse code modulated (PCM) data stream. The modulator runs at a modulator clock frequency of f(MOD) = f(CLK) / 16 in normal and duty-cycle mode and f(MOD) = f(CLK) / 8 in turbo mode, where f(CLK) is either provided by the internal oscillator or the external clock source. Table 6 shows the modulator frequency for each operating mode using either the internal oscillator or an external clock of 4.096 MHz.
OPERATING MODE | f(MOD) |
---|---|
Duty-cycle mode | 256 kHz |
Normal mode | 256 kHz |
Turbo mode | 512 kHz |