SBAS452 – SEPTEMBER 2008 ......................................................................................................................................................................................... www.ti.com
ATDAx
Decimal
Attenuation level setting
value
1111 1111
255
0 dB, no attenuation (default)
1111 1110
254
–0.5 dB
1111 1101
253
–1.0 dB
...
1000 0001
129
–63.0 dB
1000 0000
128
–63.5 dB
0111 1111
127
–64 dB
...
0011 1000
56
–99.5 dB
0011 0111
55
–100 dB
0011 0110
54
Mute
...
0000 0000
0
Mute
DEC
HEX
B7
B6
B5
B4
B3
B2
B1
B0
80
50
—
SRAD1
SRAD0
SRAD[1:0]
ADC Sampling mode select
These bits control the sampling mode of ADC operation. In Auto mode, the sampling mode is
automatically set according to multiples between system clock and sampling clock, single rate for
512 fS and 768 fS, and dual rate for 256 fS and 384 fS.
Default value: 00.
SRAD
ADC Sampling mode select
00
Auto (default)
01
Single rate
10
Dual rate
11
Reserved
46
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