MSP 3400C
PRELIMINARY DATA SHEET
Table 6–6: AD_CV parameters for constant input gain (AD_CV[7]=0)
Step
AD_CV [6:1]
Constant Gain
Gain
Input Level at pin ANA_IN1+ and ANA_IN2+
1)
0
1
2
3
4
5
6
7
000000
000001
000010
000011
000100
000101
000110
000111
001000
001001
001010
001011
001100
001101
001110
001111
010000
010001
010010
010011
010100
3.00 dB
3.85 dB
4.70 dB
5.55 dB
6.40 dB
7.25 dB
8.10 dB
8.95 dB
9.80 dB
10.65 dB
11.50 dB
12.35 dB
13.20 dB
14.05 dB
14.90 dB
15.75 dB
16.60 dB
17.45 dB
18.30 dB
19.15 dB
20.00 dB
maximum input level : 3 V (FM) or 1.4 V (AM)
pp pp
8
9
10
11
12
13
14
15
16
17
18
19
20
1)
maximum input level: 0.14 V
pp
1)
For signals above 1.4 Vpp, the minimum gain of 3 dB is switched and overflow of the AD converter may result. Due
to the robustness of the internal processing in FM mode, the IC works properly up to and even more than 3 Vpp. In AM
mode, of course, no AD converter overflow is allowed. As a consequence, in the AM-mode, the maximum input at pins
41 or 43 must not exceed 1.4 Vpp.
22
MICRONAS INTERMETALL
MICRONAS [ MICRONAS ]
