LM49200, LM49200TLEVAL

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SNAS459A – MAY 2009 – REVISED APRIL 2013

Table 6. Input Volume Control Registers

Bits

Fields

Description

4:0

Mono_Vol

These bits set the input volume for each input volume register listed.

Right_Vol

Volume Step

Value

Gain (dB)

Left_Vol

1

00000

–80.0

2

00001

–46.5

3

00010

–40.5

4

00011

–34.5

5

00100

–30.0

6

00101

–27.0

7

00110

–24.0

8

00111

–21.0

9

01000

–18.0

10

01001

–15.0

11

01010

–13.5

12

01011

–12.0

13

01100

–10.5

14

01101

–9.0

15

01110

–7.5

16

01111

–6.0

17

10000

–4.5

18

10001

–3.0

19

10010

–1.5

20

10011

0.0

21

10100

1.5

22

10101

3.0

23

10110

4.5

24

10111

6.0

25

11000

7.5

26

11001

9.0

27

11010

10.5

28

11011

12.0

29

11100

13.5

30

11101

15.0

31

11110

16.5

32

11111

18.0

TURN_ON_TIME BIT

The Turn_On_Time bit determines the delay time from the Power_On bit set to '1' and the internal circuits ready.

For input capacitor values up to 0.47

μF the Turn_On_Time bit can be set to fast mode by setting the bit to a '1'.

When the input capacitor values are larger than 0.47

μF then the Turn_On_Time bit should be set to '0' for normal

turn-on time and higher delay. This allows sufficient time to charge the input capacitors to the ½ VDDLS bias

voltage.

POWER_ON BIT

The Power_On bit is the master control bit to activate or deactivate the LM49200. All registers can be loaded

independent of the Power_On bit setting as long as the IC is powered correctly. Cycling the Power_On bit does

not change the values of any registers nor return all bits to the default power on value of zero. The Power_On bit

only determines whether the IC is on or off.

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