xrd9816acv Exar Corporation, xrd9816acv Datasheet - Page 17

• Manufacturer Part Number: xrd9816acv
• Description: 3-channel 14/16-bit Linear Ccd/cis Sensor Signal Processors
• Manufacturer: Exar Corporation

where Code represents the binary contents of the 10-
bit gain setting register.
Channel Offset Adjustment
The gross offset correction for each channel is
progammable from -400mV to +200mV. It is adjusted
by toggling PB9 and PB8 of Offset Registers (Table 4).
Theory of Operation
Differential
Input
PGA Gain =
Offset Block
Rev. 1.00
Code
1024
CDS
Block Diagram of the Fine and Gross Offset Adjustment DAC
Variable Capacitive Divider
8-Bit Offset DAC
9 0 + 1
.
Fine Adjust
Gross Adjust
2-Bit Offset
10-Bit
PGA
XRD9814/16
17
mable from -300mV to +300mV.
PB7=1 equals -1
PB7=0 equals +1
Code = (PB6:PB0) of the 10-bit offset register.
The fine offset correction for each channel is program-
Fine Channel Offset = PB
Vout
XRD9814/9816
MUX
3:1
7
Code
128
14-Bit
ADC
300mV