MAX5477EUD+-MAX5478EUD+-MAX5478EUD+T-MAX5479EUD+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX5477EUD+ ,Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometersapplications. Three♦ 256 Tap Positions per Potentiometeraddress inputs allow a total of eight uniqu ..
MAX5478EUD ,Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital PotentiometersApplications A1MAX5479A2Mechanical Potentiometer ReplacementLow-Drift Programmable-Gain Amplifiers2 ..
MAX5478EUD ,Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital PotentiometersELECTRICAL CHARACTERISTICS(V = +2.7V to +5.25V, H_ = V , L_ = GND, T = -40°C to +85°C, unless other ..
MAX5478EUD+ ,Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital PotentiometersApplicationsMAX5477A0LBMechanical Potentiometer Replacement MAX5478A1MAX5479A2Low-Drift Programmabl ..
MAX5478EUD+ ,Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital PotentiometersFeaturesThe MAX5477/MAX5478/MAX5479 nonvolatile, dual, ♦ Power-On Recall of Wiper Position fromlin ..
MAX5478EUD+T ,Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital PotentiometersELECTRICAL CHARACTERISTICS(V = +2.7V to +5.25V, H_ = V , L_ = GND, T = -40°C to +85°C, unless other ..
MAXQ3210+ ,Microcontroller with Internal Voltage Regulator, Piezoelectric Horn Driver, and ComparatorFeaturesInformation appear at end of data sheet.Analog Comparator Uses Internal or External Voltage ..
MAXQ3212 ,Microcontroller with Analog Comparator and LED DriverELECTRICAL CHARACTERISTICS(V = V to V , C = 10µF + 0.1µF, T = -40°C to +85°C. Typical values are at ..
MAXQ3212 ,Microcontroller with Analog Comparator and LED DriverFeaturesNote: Some revisions of this device may incorporate deviationsAnalog Comparator Uses Intern ..
MAXQ610A-2524+ ,16-Bit Microcontroller with Infrared ModuleApplications 0.2µA (typ), 2.0µA (max) in Stop ModeT = +25°C, Power-Fail Monitor DisabledARemote Con ..
MAXQ610A-2524+T ,16-Bit Microcontroller with Infrared ModuleFeatures16-bit RISC microcontroller and integrated peripheralsincluding two USARTs and an SPI™ mast ..
MAXQ610A-2541+T ,16-Bit Microcontroller with Infrared ModuleBlock Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..

MAX5477EUD+-MAX5478EUD+-MAX5478EUD+T-MAX5479EUD+
Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
General Description
The MAX5477/MAX5478/MAX5479 nonvolatile, dual,
linear-taper, digital potentiometers perform the function
of a mechanical potentiometer, but replace the
mechanics with a simple 2-wire digital interface. Each
device performs the same function as a discrete poten-
tiometer or variable resistor and has 256 tap points.
The devices feature an internal, nonvolatile EEPROM
used to store the wiper position for initialization during
power-up. A write-protect feature prevents accidental
overwrites of the EEPROM. The fast-mode I2C-compati-
ble serial interface allows communication at data rates
up to 400kbps, minimizing board space and reducing
interconnection complexity in many applications. Three
address inputs allow a total of eight unique address
combinations.
The MAX5477/MAX5478/MAX5479 provide three nomi-
nal resistance values: 10kΩ(MAX5477), 50kΩ
(MAX5478), or 100kΩ(MAX5479). The nominal resistor
temperature coefficient is 70ppm/°C end-to-end and
10ppm/°C ratiometric. The low temperature coefficient
makes the devices ideal for applications requiring a low-
temperature-coefficient variable resistor, such as low-
drift, programmable gain-amplifier circuit configurations.
The MAX5477/MAX5478/MAX5479 are available in 16-
pin 3mm x 3mm x 0.8mm TQFN and 14-pin 4.4mm x
5mm TSSOP packages. These devices operate over
the extended -40°C to +85°C temperature range.
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable-Gain Amplifiers
Volume Control
Liquid-Crystal Display (LCD) Contrast Control
FeaturesPower-On Recall of Wiper Position from
Nonvolatile MemoryEEPROM Write ProtectionTiny 3mm x 3mm x 0.8mm Thin QFN Package70ppm/°C End-to-End Resistance Temperature
Coefficient10ppm/°C Ratiometric Temperature CoefficientFast 400kbps I2C-Compatible Serial Interface1µA (max) Static Supply CurrentSingle-Supply Operation: +2.7V to +5.25V256 Tap Positions per Potentiometer±0.5 LSB DNL in Voltage-Divider Mode±1 LSB INL in Voltage-Divider Mode
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile,2C-Interface, Digital Potentiometers
19-3379; Rev 5; 11/11
Pin Configurations appear at end of data sheet.
EVALUATION KIT
AVAILABLE
Ordering Information/Selector Guide
PARTTEMP RANGEPIN-PACKAGEEND-TO-END
RESISTANCE (k)TOP MARK
MAX5477ETE+T -40°C to +85°C 16 TQFN-EP* 10 ABO
MAX5477EUD+ -40°C to +85°C 14 TSSOP 10 —
MAX5478ETE+T -40°C to +85°C 16 TQFN-EP* 50 ABP
MAX5478EUD+ -40°C to +85°C 14 TSSOP 50 —
MAX5479ETE+T -40°C to +85°C 16 TQFN-EP* 100 ABQ
MAX5479EUD+ -40°C to +85°C 14 TSSOP 100 —
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Functional Diagram
MAX5477
MAX5478
MAX5479
8-BIT
SHIFT
REGISTER
POR
16-BIT
LATCH
16-BIT
MEMORY
SDA
SCL256
POSITION
DECODER
POSITION
DECODER
VDD
GND2C
INTERFACE
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDD= +2.7V to +5.25V, H_ = VDD, L_ = GND, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VDD= +5V,=+25°C.) (Note 2)
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.
SDA, SCL, VDDto GND.........................................-0.3V to +6.0V
All Other Pins to GND.................................-0.3V to (VDD+ 0.3V)
Maximum Continuous Current into H_, L_, and W_
MAX5477......................................................................±5.0mA
MAX5478......................................................................±1.3mA
MAX5479......................................................................±0.6mA
Continuous Power Dissipation (TA= +70°C)
16-Pin TQFN (derate 17.5mW/°C above +70°C).......1398mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C).........727mW
Operating Temperature Range...........................-40°C to +85°C
Maximum Junction Temperature.....................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θJA)........57.2°C/W
Junction-to-Case Thermal Resistance (θJC)................40°C/W
TSSOP
Junction-to-Ambient Thermal Resistance (θJA)......100.4°C/W
Junction-to-Case Thermal Resistance (θJC)................30°C/W
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DC PERFORMANCE (VOLTAGE-DIVIDER MODE)
Resolution 256 Taps
Integral Nonlinearity INL (Note 3) ±1 LSB
Differential Nonlinearity DNL (Note 3) ±0.5 LSB
Dual Code Matching R0 and R1 set to same code (all codes) ±1 LSB
End-to-End Resistance
Temperature Coefficient TCR 70 ppm/°C
Ratiometric Resistance
Temperature Coefficient 10 ppm/°C
MAX5477 -4
MAX5478 -0.6 Full-Scale Error
MAX5479 -0.3
LSB
MAX5477 4
MAX5478 0.6 Zero-Scale Error
MAX5479 0.3
LSB
DC PERFORMANCE (VARIABLE-RESISTOR MODE)
VDD = 3V ±3 Integral Nonlinearity (Note 4) INL VDD = 5V ±1.5 LSB
MAX5477 ±1
MAX5478 ±1 Differential Nonlinearity (Note 4) DNL
LSB
Note 1:Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to /thermal-tutorial.
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
ELECTRICAL CHARACTERISTICS (continued)
(VDD= +2.7V to +5.25V, H_ = VDD, L_ = GND, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VDD= +5V,=+25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Dual Code Matching R0 and R1 set to same code
(all codes), VDD = 3V or 5V ±3 LSB
DC PERFORMANCE (RESISTOR CHARACTERISTICS)
Wiper Resistance RW(Note 5) 325 675
Wiper Capacitance CW 10 pF
MAX5477 7.510 12.5
MAX5478 37.5 50 62.5 End-to-End Resistance RHL
MAX5479 75 100 125
DIGITAL INPUTS
VDD = 3.4V to 5.25V 2.4 Input High Voltage (Note 6) VIHVDD < 3.4V 0.7 x VDD V
Input Low Voltage VIL (Note 6) 0.8 V
Output Low Voltage VOL ISINK = 3mA 0.4 V
WP Pullup Resistance IWP 255 k
Input Leakage Current ILEAK ±1µA
Input Capacitance 5 pF
DYNAMIC CHARACTERISTICS
Crosstalk HA = 1kHz (0 to VDD), LA = GND,
LB = GND, measure WB -75 dB
MAX5477 400
MAX5478 100 3dB Bandwidth (Note 7)
MAX5479 50
kHz
Total Harmonic Distortion Plus
Noise THD+N H_ = 1VRMS, f = 1kHz, L_ = GND,
measure W_ 0.003 %
NONVOLATILE MEMORY RELIABILITY
Data Retention TA = +85°C 50 Years
TA = +25°C 200,000 Endurance TA = +85°C 50,000 Stores
POWER SUPPLY
Power-Supply Voltage VDD 2.70 5.25 V
Writing to EEPROM, digital inputs at
GND or VDD, TA = +25°C (Note 8) 250 400
WP = GND 1520.6Supply Current IDDNormal operation,
digital inputs at GND or
VDD, TA = +25°C WP = VDD 0.5 1
µA
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
Note 2:All devices are production tested at TA= +25°C and are guaranteed by design and characterization for -40°C < TA< +85°C.
Note 3:The DNL and INL are measured with the potentiometer configured as a voltage-divider with H_ = VDDand L_ = GND. The
wiper terminal is unloaded and measured with a high-input-impedance voltmeter.
Note 4:The DNL and INL are measured with the potentiometer configured as a variable resistor. H_ is unconnected and L_ =
GND. For VDD= +5V, the wiper is driven with 400µA (MAX5477), 80µA(MAX5478), or 40µA (MAX5479). For VDD= +3V,
the wiper is driven with 200µA (MAX5477), 40µA (MAX5478), or 20µA (MAX5479).
Note 5:The wiper resistance is measured using the source currents given in Note 3.
Note 6:The devices draw current in excess of the specified supply current when the digital inputs are driven with voltages between
(VDD - 0.5V) and (GND + 0.5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.
Note 7:Wiper at midscale with a 10pF load (DC measurement). L_ = GND, an AC source is applied to H_, and the W_ output is
measured. A 3dB bandwidth occurs when the AC W_/H_ value is 3dB lower than the DC W_/H_ value.
Note 8:The programming current exists only during power-up and EEPROM writes.
Note 9:The SCL clock period includes rise and fall times (tR= tF). All digital input signals are specified with tR= tF= 2ns and
timed from a voltage level of (VIL+ VIH) / 2.
Note 10:Digital timing is guaranteed by design and characterization, and is not production tested.
Note 11:This is measured from the STOP pulse to the time it takes the output to reach 50% of the output step size (divider mode).It
is measured with a maximum external capacitive load of 10pF.
Note 12:An appropriate bus pullup resistance must be selected depending on board capacitance. Refer to the I2C-bus specifica-
tion document linked to this web address: www.semiconductors.philips.com/acrobat/literature/9398/39340011.pdf
Note 13:The idle time begins from the initiation of the STOP pulse.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
ANALOG SECTION
MAX5477 325
MAX5478 500 Wiper Settling Time (Note 11) tWS
MAX5479 1000
ns
DIGITAL SECTION
SCL Clock Frequency fSCL 400 kHz
Setup Time for START Condition tSU:STA 0.6 µs
Hold Time for START Condition tHD:STA 0.6 µs
SCL High Time tHIGH 0.6 µs
SCL Low Time tLOW 1.3 µs
Data Setup Time tSU:DAT 100 ns
Data Hold Time tHD:DAT 0 0.9 µs
SDA, SCL Rise Time tR 300 ns
SDA, SCL Fall Time tF 300 ns
Setup Time for STOP Condition tSU:STO 0.6 µs
Bus Free Time Between STOP and
START Condition tBUF Minimum power-up rate = 0.2V/µs 1.3 µs
Pulse Width of Spike Suppressed tSP 50 ns
Capacitive Load for Each Bus Line CB(Note 12) 400 pF
Write NV Register Busy Time (Note 13) 12 ms
TIMING CHARACTERISTICS
(VDD= +2.7V to +5.25V, H_ = VDD, L_ = GND, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VDD= +5V, = +25°C. See Figure 1.) (Notes 9 and 10)
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
SUPPLY CURRENT
vs. TEMPERATURE (MAX5477)
MAX5477/78/79 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (
VCC = 5V
WP = VDD
VCC = 3V
SUPPLY CURRENT
vs. TEMPERATURE
MAX5477/78/79 toc1a
TEMPERATURE (°C)
SUPPLY CURRENT (
VCC = 5V
WP = GND
VCC = 3V
WIPER RESISTANCE
vs. INPUT CODE
INPUT CODE
WIPER RESISTANCE (
200ns/div
TAP-TO-TAP SWITCHING TRANSIENT
SDA
2V/div
50mV/div
MAX5477/78/79 toc03
MAX5477
CL = 10pF
H_ = VDD
FROM TAP 00 TO TAP 04
TAP-TO-TAP SWITCHING TRANSIENT
MAX5477/78/79 toc04
1μs/div
SDA
2V/div
20mV/div
MAX5478
CL = 10pF
H_ = VDD
FROM TAP 00 TO TAP 04
TAP-TO-TAP SWITCHING TRANSIENT
MAX5477/78/79 toc05
400ns/div
SDA
2V/div
20mV/divMAX5479
CW_ = 10pF
H_ = VDD
FROM TAP 00 TO TAP 04
2μs/div
WIPER TRANSIENT AT POWER-ON
VDD
2V/div
1V/div
MAX5477/78/79 toc06
MAX5477
TAP = 128
WIPER TRANSIENT AT POWER-ON
MAX5477/78/79 toc07
4μs/div
VDD
2V/div
1V/div
MAX5478
TAP = 128
WIPER TRANSIENT AT POWER-ON
MAX5477/78/79 toc08
2μs/div
VDD
2V/div
1V/divMAX5479
TAP = 128
Typical Operating Characteristics
(VDD= +5V, H_ = VDD, L_ = GND, TA= +25°C, unless otherwise noted.)
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
DIFFERENTIAL NONLINEARITY
vs. CODE (VDM MODE)
MAX5477/78/79 toc10
CODE
DNL (LSB)
MAX5477
INTEGRAL NONLINEARITY
vs. CODE (VDM MODE)
MAX5477/78/79 toc11
CODE
INL (LSB)
MAX5478
DIFFERENTIAL NONLINEARITY
vs. CODE (VDM MODE)
MAX5477/78/79 toc12
CODE
DNL (LSB)
MAX5478
INTEGRAL NONLINEARITY
vs. CODE (VRM MODE)
MAX5477/78/79 toc13
CODE
INL (LSB)
MAX5478
DIFFERENTIAL NONLINEARITY
vs. CODE (VRM MODE)
MAX5477/78/79 toc14
CODE
DNL (LSB)
MAX5478
INTEGRAL NONLINEARITY
vs. CODE (VDM MODE)
MAX5477/78/79 toc15
INL (LSB)
MAX5479
DIFFERENTIAL NONLINEARITY
vs. CODE (VDM MODE)
MAX5477/78/79 toc16
DNL (LSB)
MAX5479
INTEGRAL NONLINEARITY
vs. CODE (VRM MODE)
MAX5477/78/79 toc17
INL (LSB)
MAX5479ypical Operating Characteristics (continued)
(VDD= +5V, H_ = VDD, L_ = GND, TA= +25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY
vs. CODE (VDM MODE)
MAX5477/78/79 toc09
CODE
INL (LSB)
MAX5477
MAX5477/MAX5478/MAX5479
CROSSTALK vs.
FREQUENCY (MAX5478)
FREQUENCY (kHz)
CROSSTALK (dB)
CW_ = 10pF
CROSSTALK vs.
FREQUENCY (MAX5479)
MAX5477/78/79 toc21
FREQUENCY (kHz)
CROSSTALK (dB)
0.110,000
CW_ = 10pF
FREQUENCY (kHz)
GAIN (dB)
MIDSCALE WIPER RESPONSE
vs. FREQUENCY (MAX5477)0.1101001000
MAX5477/78/79 toc22
CW_ = 10pF
CW_ = 50pF
MIDSCALE WIPER RESPONSE
vs. FREQUENCY (MAX5478)
MAX5477 toc23
FREQUENCY (kHz)
GAIN (dB)
CW_ = 50pF
CW_ = 10pF
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (MAX5478)
MAX5477/78/79 toc26
THD+N (%)10.1
MIDSCALE
Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
DIFFERENTIAL NONLINEARITY
vs. CODE (VRM MODE)
MAX5477/78/79 toc18
CODE
DNL (LSB)
MAX5479
FREQUENCY (kHz)
CROSSTALK (dB)
CROSSTALK vs.
FREQUENCY (MAX5477)
0.1110100100010,000
MAX5477/78/79 toc19
CW_ = 10pF
MIDSCALE WIPER RESPONSE
vs. FREQUENCY (MAX5479)
MAX5477/78/79 toc24
GAIN (dB)
CW_ = 50pF
CW_ = 10pF
THD+N (%)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (MAX5477)
MAX5477/78/79 toc25
MIDSCALEypical Operating Characteristics (continued)
(VDD= +5V, H_ = VDD, L_ = GND, TA= +25°C, unless otherwise noted.)
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
Typical Operating Characteristics (continued)
(VDD= +5V, H_ = VDD, L_ = GND, TA= +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (MAX5479)
MAX5477/78/79 toc27
FREQUENCY (kHz)
THD+N (%)10.1
MIDSCALE
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE (MAX5477)
MAX5477/78/79 toc28
TEMPERATURE (°C)
END-TO-END RESISTANCE CHANGE (%)-153560
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE (MAX5478)
MAX5477/78/79 toc29
TEMPERATURE (°C)
END-TO-END RESISTANCE CHANGE (%)
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE (MAX5479)
MAX5477/78/79 toc30
TEMPERATURE (°C)
END-TO-END RESISTANCE CHANGE (%)
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
MAX5477/78/79 toc31
DIGITAL INPUT VOLTAGE (V)
SUPPLY CURRENT (
WP = GND
VCC = 5V
VCC = 3V200
100

Partno	Mfg	Dc	Qty	Available	Descript
MAX5477EUD+	MAIXM	N/a	4000	avai	Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
MAX5478EUD+ \|MAX5478EUD	MAXIM	N/a	288	avai	Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
MAX5478EUD+	N/A	N/a	2500	avai	Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
MAX5478EUD+T \|MAX5478EUDT	MAXIM Pb-free	N/a	31	avai	Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers
MAX5479EUD+	N/A	N/a	2500	avai	Dual, 256-Tap, Nonvolatile, I²C-Interface, Digital Potentiometers