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MAX5408EEE+T |MAX5408EEETMAXIMN/a148avaiDual, Audio, Log Taper Digital Potentiometers
MAX5410EEE+ |MAX5410EEEMAXN/a22avaiDual, Audio, Log Taper Digital Potentiometers
MAX5410EEE+ |MAX5410EEEMAXIMN/a2000avaiDual, Audio, Log Taper Digital Potentiometers
MAX5410EEE+TMAXIMN/a7071avaiDual, Audio, Log Taper Digital Potentiometers


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MAX5408EEE+T-MAX5410EEE+-MAX5410EEE+T
Dual, Audio, Log Taper Digital Potentiometers
General Description
The MAX5408–MAX5411 dual, logarithmic taper digital
potentiometers, with 32-tap points each, replace
mechanical potentiometers in audio applications requir-
ing digitally controlled resistors. The MAX5408/
MAX5410 are dual potentiometers with one wiper per
potentiometer. The MAX5409/MAX5411 are dual poten-
tiometers with two wipers per potentiometer (see
Functional Diagram). An SPI™-compatible serial inter-
face controls the wiper positions. The MAX5408–
MAX5411 have a factory-set resistance of 10kΩper
potentiometer. A zero-crossing detect feature mini-
mizes the audible noise generated by wiper transitions.
The MAX5408–MAX5411 have nominal temperature
coefficients of 35ppm/°C end-to-end and 5ppm/°C
ratiometric. The MAX5408–MAX5411 are available in
16-pin QSOP and 16-pin thin QFN packages and are
specified over the extended temperature range (-40°C
to +85°C).
Applications

Stereo Volume Control
Fading and Balancing Stereo Signals
Mechanical Potentiometer Replacement
Features
Log Taper with 2dB Steps Between Taps32-Tap Positions for Each WiperSmall 16-Pin QSOP/QFN Packages Single-Supply Voltage Operation
+2.7V to +3.6V (MAX5408/MAX5409)
+4.5V to +5.5V (MAX5410/MAX5411)
Low 0.5µA Standby Supply CurrentZero-Crossing Detection for Clickless SwitchingMute Function to -90dB10kΩFixed Resistance Value3-Wire SPI-Compatible Serial Data InterfacePower-On Reset: Wiper Goes to Maximum
Attenuation
Digital Output for Readback and Daisy-Chaining
Capabilities
MAX5408–MAX5411
Dual, Audio, Log Taper Digital Potentiometers
Pin Configurations
Ordering Information

19-2049; Rev 3; 1/05
PARTTEMP RANGEPIN-
PACKAGE
WIPERS PER
RESISTOR
MAX5408EEE
-40°C to +85°C16 QSOP1
MAX5408ETE-40°C to +85°C16 Thin QFN1
MAX5409EEE
-40°C to +85°C16 QSOP2
DOUTVDD
VLOGIC
GND
AGND
W1A
N.C. (W1B)
TOP VIEW
MAX5408-
MAX5411
QSOP

DIN
SCLK
W0A
N.C. (W0B)151413
DINDOUTVDDVLOGIC678
W0AN.C. (W0B)N.C. (W1B)W1A
( ) ARE FOR MAX5409/MAX5411 ONLY
AGND
GND
SCLK
MAX5408-
MAX5411
THIN QFN

(4mm x 4mm)
(5mm x 6mm)
Ordering Information continued at end of data sheet.
Functional Diagram appears at end of data sheet.

SPI is a trademark of Motorola, Inc.
VDD, VLOGIC, CS, SCLK, DIN to GND......................-0.3V to +6V
H_, L_, and W_ to GND..............................-0.3V to (VDD+ 0.3V)
DOUT to GND.............................................-0.3V to (VDD+ 0.3V)
AGND to GND.......................................................-0.3V to +0.3V
Input and Output Latchup Immunity...............................±200mA
Maximum Continuous Current into H_, L_, and W_.........±500µA
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)........666.7mW
16-Pin QFN (derate 18.5mW/°C above +70°C).........1481mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-60°C to +150°C
Maximum Junction Temperature.....................................+150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX5408–MAX5411
Dual, Audio, Log Taper Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VDD= +2.7V to +3.6V (MAX5408/MAX5409), VDD= +4.5V to +5.5V (MAX5410/MAX5411), VH_= VDD, VL_= 0, TA= TMINto TMAX.
Typical values are at TA= +25°C, unless otherwise specified.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

End-to-End Resistance71013kΩ
Maximum Bandwidth(Note 1) CW_ = 50pF100kHz
Absolute Tolerance±0.25dB
Tap-to-Tap Tolerance±0.1dB
Total Harmonic Distortion + NoiseTHD+NVIN = 1VRMS, f = 1kHz, tap = -6dB0.002%
Channel Isolation-100dB
Interchannel Matchingf = 20Hz to 20kHz, tap = -6dB±0.5dB
Mute Attenuation-90dB
Power-Supply Rejection RatioPSRR-80dB
Wiper ResistanceRW10001700Ω
Wiper CapacitanceCW10pF
Digital Clock FeedthroughfSCLK = 20Hz to 20kHz, tap = -6dB-90dB
End-to-End Resistance
Temperature Coefficient35ppm/°C
Ratiometric Resistance
Temperature Coefficient5ppm/°C
DIGITAL INPUTS (VLOGIC > 4.5V)

Input High VoltageVIH2.4V
Input Low VoltageVIL0.8V
Input Leakage Current±1µA
Input Capacitance5pF
DIGITAL INPUTS (VLOGIC < 4.5V)

Input High VoltageVIH0.7 x
VLOGIC V
Input Low VoltageVIL0. 3 x
VLOGICV
Input Leakage Current±1µA
Input Capacitance5pF
MAX5408–MAX5411
Dual, Audio, Log Taper Digital Potentiometers
ELECTRICAL CHARACTERISTICS (continued)

(VDD= +2.7V to +3.6V (MAX5408/MAX5409), VDD= +4.5V to +5.5V (MAX5410/MAX5411), VH_= VDD, VL_= 0, TA= TMINto TMAX.
Typical values are at TA= +25°C, unless otherwise specified.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DIGITAL OUTPUT

Output High VoltageVOHISOURCE = 0.5mAVLOGIC
- 0.5V
Output Low VoltageVOLISINK = 2mA0.4V
TIMING CHARACTERISTICS (Figure 1)

SCLK Clock PeriodtCP100ns
SCLK Pulse Width HightCH40ns
SCLK Pulse Width LowtCL40ns
CS Fall to SCLK Rise Setup
TimetCSS40ns
SCLK Rise to CS Rise Hold TimetCSH0ns
DIN Setup TimetDS40ns
DIN Hold TimetDH0ns
SCLK Fall to DOUT Valid
Propagation DelaytDOCLOAD = 200pF80ns
CS Rise to SCLK Rise Hold TimetCS140ns
CS Pulse Width HightCSW100ns
Wiper Settling TimetIWZero-crossing detect disabled1µs
POWER SUPPLIES

MAX5408/MAX54092.73.6Supply VoltageVDD
MAX5410/MAX54114.55.5
Active Supply CurrentfSCLK = 2MHz (Note 2)100
Standby Supply CurrentIDD(Note 3)0.210µA
Logic Supply VoltageVLOGIC2.75.5V
Logic Active Supply CurrentfS C L K = 2M H z, D OU T = fl oati ng ( N ote 2) 120
Logic Standby Supply CurrentILOGICDOUT = floating (Note 3)0.510µA
Note 1:
Guaranteed by design, not production tested.
Note 2:
Supply current measured while changing wiper position with zero crossing enabled.
Note 3:
Supply current measured while wiper position is fixed.
MAX5408–MAX5411
Dual, Audio, Log Taper Digital Potentiometers
Typical Operating Characteristics

(VDD= +3V (MAX5408/MAX5409), VDD= +5V (MAX5410/MAX5411), DOUT = floating)
WIPER RESISTANCE vs.
WIPER VOLTAGE
MAX5408-11
toc01
WIPER VOLTAGE (V)
WIPER RESISTANCE (
TAP POSITION 31
VDD = 5V = VLOGIC, L_ = GND
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
MAX5408-11 toc02
TEMPERATURE (°C)
END-TO-END RESISTANCE CHANGE (%)
ATTENUATION vs. TAP POSITION
MAX5408-11 toc03
TAP POSITION
ATTENUATION (dB)
TOTAL SUPPLY CURRENT
VS. TEMPERATURE
MAX5408-11 toc04
TEMPERATURE (°C)
TOTAL SUPPLY CURRENT (
ZERO-CROSSING ENABLED
ITOTAL = IDD + ILOGIC
ACTIVE MODE
4µs/div
TAP-TO-TAP SWITCHING TRANSIENT
(ZERO-CROSSING DISABLE)

VW_
2V/div
2V/div
MAX5408-11 toc05
VH_ = 5V
VL_ = 0
LOGIC CURRENT
vs. LOGIC VOLTAGE
MAX5408-11 toc06
LOGIC SUPPLY VOLTAGE (V)
LOGIC SUPPLY CURRENT (
STANDBY MODE
SCLK = GND
MAX5408–MAX5411
Dual, Audio, Log Taper Digital Potentiometersypical Operating Characteristics (continued)

(VDD= +3V (MAX5408/MAX5409), VDD= +5V (MAX5410/MAX5411), DOUT = floating)
LOGIC CURRENT
vs. LOGIC VOLTAGE
MAX5408-11 toc07
LOGIC SUPPLY VOLTAGE (V)
LOGIC SUPPLY CURRENT (
ACTIVE MODE
SCLK = 2MHz, O to VLOGIC
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5408-11 toc08
VDD (V)
IDD
ZERO-CROSSING DETECTION DISABLED
ACTIVE
STANDBY
Pin Description
PINA X5 4 0 8 / A X5 4 1 0 ( Q F N ) A X5 4 0 8 / A X5 4 1 0 ( Q SO P) A X5 4 0 9 / A X5 4 1 1 ( Q F N ) A X5 4 0 9 / A X5 4 1 1 ( Q SO P)
NAMEFUNCTION
13SCLKSerial Clock Input24CSChip-Select Input35H0High Terminal of Resistor 046L0Low Terminal of Resistor 057W0AWiper Terminal A of Resistor 068W0BWiper Terminal B of Resistor 079W1BWiper Terminal B of Resistor 1
810810W1AWiper Terminal A of Resistor 1
911911L1Low Terminal of Resistor 1121012H1High Terminal of Resistor 1131113AGNDAnalog Ground141214GNDGround151315V LOGIC Digital Logic Power Supply161416VDDAnalog Power Supply1151DOUTSerial Data Output2162DINSerial Data Input
6, 78, 9——N.C.No Connection. Not internally connected.
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