MAX5408EEE+ Maxim Integrated Products, MAX5408EEE+ Datasheet - Page 6

• Manufacturer Part Number: MAX5408EEE+
• Description: IC POT DGTL DUAL AUDIO 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5408EEE+

• Taps: 32
• Resistance (ohms): 10K
• Number Of Circuits: 2
• Temperature Coefficient: 35 ppm/°C Typical
• Memory Type: Volatile
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Resistance In Ohms: 10K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

An SPI-compatible serial interface controls the
MAX5408–MAX5411. The input word to the device is
eight bits long, composed of three address bits (A0,
A1, and A2), followed by five data bits, with MSB first
(see Tables 1 and 2). The first three address bits set
the value of internal registers. The five data bits control
the wiper position. For certain commands, some of the
five data bits are “don’t cares”, but must be sent to the
device.
The serial data is listed in Tables 1 and 2.
The control code determines:
• Potentiometer to update or register to set.
• Data for mute register (Tables 3 and 4).
• Data for zero-crossing detection register (Tables 5
The data bits control the position of the wiper (Table 7).
A logic low on the chip-select input (CS) enables the
device’s serial interface. A logic high on CS disables
the interface control circuitry. See Figure 1 for serial-
interface timing description.
Dual, Audio, Log Taper Digital Potentiometers
6
Table 1. Serial Interface Programming Commands for MAX5408/MAX5410
and 6).
_______________________________________________________________________________________
A0
0
0
0
0
1
1
1
1
1
1
1
1
1
A1
0
0
1
1
0
0
1
1
1
1
1
1
1
Detailed Description
Digital Serial Interface
8-BIT SERIAL WORD
A2
0
1
0
1
0
1
0
0
0
0
0
0
1
5-bit DAC data
5-bit DAC data
5-bit DAC data
5-bit DAC data
4-bit mute data, D0 = “don’t care”
4-bit zero-crossing detection data,
D0 = “don’t care”
00000
00001
00010
00011
00100
00101
D4 = 0, D3–D0 = “don’t care”
D4–D0
Figure 1. Serial Timing Diagram
WIPER
DOUT
DOUT
SCLK
SCLK
DIN
DIN
CS
CS
Set position of wiper W0A
No change
Set position of wiper W1A
No change
Data for mute register (see Table 3)
Data for zero-crossing detection register
(see Table 5)
Readback contents of wiper register for W0A
at DOUT
No change
Readback contents of wiper register for W1A
at DOUT
No change
Readback contents of mute register at DOUT
Readback contents of zero-crossing detection
register at DOUT
Immediate update then analog power-down
when zero crossing is enabled. No effect
when zero crossing is disabled.
t
CSS
t
DS
t
DH
t
CP
t
FUNCTION
DO
t
CL
t
CH
t
CSH
t
t
IW
CSI
t
CSW