Datasheet

MAX5408–MAX5411
Dual, Audio, Log Taper Digital Potentiometers
_______________________________________________________________________________________ 7
8-BIT SERIAL WORD
A0 A1 A2 D4–D0
FUNCTION
0005-bit DAC data Set position of wiper W0A
0015-bit DAC data Set position of wiper W0B
0105-bit DAC data Set position of wiper W1A
0115-bit DAC data Set position of wiper W1B
100
4-bit mute data, D0 = “don’t care”
Data for mute register (see Table 4)
101
4-bit zero-crossing detection data,
D0 = “don’t care”
Data for zero-crossing detection register
(see Table 6)
11000000 Readback contents of wiper register for W0A at DOUT
11000001 Readback contents of wiper register for W0B at DOUT
11000010 Readback contents of wiper register for W1A at DOUT
11000011 Readback contents of wiper register for W1B at DOUT
11000100 Readback contents of mute register at DOUT
11000101 Readback contents of zero-crossing detection register at DOUT
111D4 = 0, D3–D0 = “don’t care” Analog power-down
111D4 = 1, D3–D0 = “don’t care” Analog power-up
Table 2. Serial Interface Programming Commands for MAX5409/MAX5411
DATA BIT VALUE FUNCTION
0 Set wiper W0A to preprogrammed value (-62dB on power-up)
D4
1 Set wiper W0A to mute (-90dB)
D3 “don’t care” No change
0 Set wiper W1A to preprogrammed value (-62dB on power-up)
D2
1 Set wiper W1A to mute (-90dB)
D1 “don’t care” No change
D0 “don’t care” No change
Table 3. Mute Register Bit Definitions for MAX5408/MAX5410
DATA BIT VALUE FUNCTION
0 Set wiper W0A to preprogrammed value (-62dB on power-up)
D4
1 Set wiper W0A to mute (-90dB)
0 Set wiper W0B to preprogrammed value (-62dB on power-up)
D3
1 Set wiper W0B to mute (-90dB)
0 Set wiper W1A to preprogrammed value (-62dB on power-up)
D2
1 Set wiper W1A to mute (-90dB)
0 Set wiper W1B to preprogrammed value (-62dB on power-up)
D1
1 Set wiper W1B to mute (-90dB)
D0 “don’t care” No change
Table 4. Mute Register Bit Definitions for MAX5409/MAX5411