MSP3400C datasheet(22/73 Pages) MICRONAS

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PRELIMINARY DATA SHEET

MSP 3400C

MICRONAS INTERMETALL

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+

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 level1): 3 Vpp (FM) or 1.4 Vpp (AM)

maximum input level: 0.14 Vpp1)

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.

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