ZSSC3224 datasheet(13/51 Pages) IDT

13 / 51 page

ZSSC3224 Datasheet

October 24, 2016

2.3.2.

Analog-to-Digital Converter

An analog-to-digital converter (ADC) is used to digitize the amplifier signal. To allow optimizing the trade-off between

conversion time and resolution, the resolution can be programmed in a range from 12-bit to 24-bit (Adc_bits bit field in the

SM_config register; section 3.6.2). The ADC processes differential input signals.

Table 2.4

ADC Conversion Times for a Single Analog-to-Digital Conversion

Resolution (Bits)

Conversion Time in µs (typical)

140

185

250

335

470

640

890

1250

1760

2460

3480

4890

6940

The ADC can perform an offset shift in order to adapt input signals with offsets to the ADC input range. The shift feature is

enabled by setting the SM_config register

’s bit 15 = 1 (Shift_method = 1). The respective analog offset shift can be set up

with bits [14:12], the Offset bit field in SM_config. The offset shift causes the ADC to perform an additional amplification of

the ADC’s input signal by a factor of 2. This must be taken into consideration for a correct analog sensor setup via

configuration of the pre-

amplifier’s gain, the ADC offset shift, and the potential ADC gain.

ZSSC3224 Datasheet(PDF) 13 Page - Integrated Device Technology