CS5516, CS5520
AIN and VREF Non-Ratiometric Offset Registers
Register
MSB
20
2-1
2-2
2-3
2-4
2-5
Reset (R)
0
0
0
0
0
0
LSB
2-18
2-19
2-20
2-21
2-22
2-23
0
0
0
0
0
0
One LSB represents 2-23 proportion of the internal MDRV (≈2.5 Volts)
DAC Register
D23 D22 D21 D20 D19 D18 D17 D16 D15 D14 D13 D12
Register
DAC3 DAC2 DAC1 DAC0 EXC F1
F0 D16 G1
G0 U/B D12
Reset (R)
0
0
0
0
0
0
0
0
0
0
0
0
Register
Reset (R)
D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
A/S EC
D9
D8 CC3 CC2 CC1 CC0 D3
D2
D1
RF
0
0
0
0
0
0
0
0
0
0
0
0
BIT
DAC3
DAC2-0
NAME
DAC Sign Bit
DAC Bits
Bits
D19 to D0
VALUE
0
R1
1
000
R
001
010
011
100
101
110
111
0
R
Add Offset
Subtract Offset
FUNCTION
25% Offset
50% Offset
75% Offset
100% Offset
125% Offset
150% Offset
175% Offset
These bits mirror the
Configuration Register
read only2
Note: 1. Reset State
2. A write to these bits does not change the register bit values.
AIN Ratiometric Offset Register
Register
MSB
20
2-1
2-2
2-3
2-4
2-5
Reset (R)
0
0
0
0
0
0
LSB
2-18
2-19
2-20
2-21
2-22
2-23
0
0
0
0
0
0
One LSB represents 2-23 proportion of the voltage [<(VREF+) - (VREF-)>/GAIN] where GAIN = 25 X PGA Gain
GAIN Register
Register
MSB
20
2-1
2-2
2-3
2-4
2-5
Reset (R)
1
0
0
0
0
0
LSB
2-18
2-19
2-20
2-21
2-22
2-23
0
0
0
0
0
0
The gain register span from 0 to (2-2-23). After Reset the MSB=1, all other bits are 0.
Table 4. Calibration Registers
1188
DS74F21