AFE8201PFBR BURR-BROWN [Burr-Brown Corporation], AFE8201PFBR Datasheet - Page 17

• Manufacturer Part Number: AFE8201PFBR
• Description: IF Analog-to-Digital Converter with Digital Downconverter
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

AUXILIARY DAC
In normal operation the auxiliary DAC values are sent over the data interface through input pin DIN and framed by
DFSI. The auxiliary DAC control register, shown in Figure 19, allows the DAC value to be set through the control
interface as an alternative. A new DAC value through either interface will cause the DAC output to change, regardless
of which interface set the previous DAC value. Please note, however, that unpredictable results will occur if both
interfaces write to the DAC at the same time.
PGA AND POWER-DOWN
The gain of PGA and the power-down mode can be set in register 12. The gain setting of the PGA is shown in Table 4.
Bit 0
PWD = 0 for normal operation.
PWD = 1 for power-down.
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0
0
Register Address
Register Address
1
1
0
1
1
0
1
0
PGA Gain Range
15
15
1.00
1.14
1.33
1.60
2.00
2.67
4.00
Don’t Care
14
14
13
13
Figure 19. Auxiliary DAC Control Register
Figure 20. PGA and PWD Register
12
12
Table 4. PGA Gain Setting
11
11
Don’t Care
10
10
9
9
8
8
7
7
SBWS016A − OCTOBER 2003 − REVISED JANUARY 2005
DAC_DATA
6
6
5
5
(B4, B3, and B2)
3-Bit Code
4
000
100
010
110
001
101
011
4
GAIN
3
3
2
2
Don’t
Care
1
1
AFE8201
PWD
0
0
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