AK5383 Datasheet, PDF (13/20 Pages) Asahi Kasei Microsystems – Enhanced Dual bit 96 kHz 24-bit ADC

ASAHI KASEI
[AK5383]
n Offset Calibration
When RST pin goes to "L", the digital section is powered-down. Upon returning "H", an offset calibration cycle is
started. An offset calibration cycle should always be initiated after power-up.
During the offset calibration cycle, the digital section of the part measures and stores the values of calibration input of each
channel in registers. The calibration input value is subtracted from all future outputs. The calibration input may be
obtained from either the analog input pins (AIN+/-) or the VCOM pins depending on the state of the ZCAL pin. With
ZCAL "H", the analog input pin voltages are measured, and with ZCAL "L", the VCOM pin voltages are measured. The
CAL output is "H" during calibration.
n Digital High Pass Filter
The AK5383 also has a digital high pass filter for DC offset cancel. The cut-off frequency of the HPF is 1Hz at fs=48kHz
and also scales with sampling rate(fs).
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