LM48822, LM48822TLEVAL

www.ti.com

SNAS456C – MAY 2008 – REVISED MAY 2013

Table 4. Volume Control Table (continued)

VOLUME STEP

VOL5

VOL4

VOL3

VOL2

VOL1

VOL0

HP GAIN (dB)

32

0

1

1

1

1

1

–12

33

1

0

0

0

0

0

–11.5

34

1

0

0

0

0

1

–11

35

1

0

0

0

1

0

–10.5

36

1

0

0

0

1

1

–10

37

1

0

0

1

0

0

–9.5

38

1

0

0

1

0

1

–9

39

1

0

0

1

1

0

–8.5

40

1

0

0

1

1

1

–8

41

1

0

1

0

0

0

–7.5

42

1

0

1

0

0

1

–7

43

1

0

1

0

1

0

–6.5

44

1

0

1

0

1

1

–6

45

1

0

1

1

0

0

–5.5

46

1

0

1

1

0

1

–5

47

1

0

1

1

1

0

–4.5

48

1

0

1

1

1

1

–4

49

1

1

0

0

0

0

–3.5

50

1

1

0

0

0

1

–3

51

1

1

0

0

1

0

–2.5

52

1

1

0

0

1

1

–2

53

1

1

0

1

0

0

–1.5

54

1

1

0

1

0

1

–1

55

1

1

0

1

1

0

–0.5

56

1

1

0

1

1

1

0

57

1

1

1

0

0

0

0.5

58

1

1

1

0

0

1

1

59

1

1

1

0

1

0

1.5

60

1

1

1

0

1

1

2

61

1

1

1

1

0

0

2.5

62

1

1

1

1

0

1

3

63

1

1

1

1

1

0

3.5

64

1

1

1

1

1

1

4

SHUTDOWN FUNCTION

The LM48822 features three shutdown controls. Bits B6 (SDL) and B1 (SDR) of the MODE CONTROL register

control the left and right channels, respectively. Set the control bits to 1 to disable the corresponding channel.

When SDR = 1 and SDL = 0, the right channel is disabled, the right and left inputs are summed and output as a

mono signal on the OUTL. When SDL = 1 and SDR = 0, the left channel is disabled, while only the right input

signal is output on OUTR. Setting both SDL and SDR = 1 disables both channels, while the charge pump

remains active. Bit B6 (SHDN) of the VOLUME CONTROL register is the global shutdown control for the entire

device. Set SHDN = 1 to disable the entire device; both amplifiers and charge pump are disabled. Set SHDN = 0

for normal operation. SHDN = 1 overrides any other shutdown control bit.

MUTE FUNCTION

Set bits B2 (MUTE_LEFT) and B0 (MUTE_RIGHT) of the MODE CONTROL register to 1 to mute the respective

channels. Set MUTE_LEFT and MUTE_RIGHT to 0 for normal operation.

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