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MAX5472EZT+T

P1-P3P4-P6P7-P9P10-P12
General Description
The MAX5471/MAX5472/MAX5474/MAX5475 linear-
taper digital potentiometers function as mechanical
potentiometers, but replace the mechanics with a sim-
ple 3-wire up/down digital interface. These digital
potentiometers feature nonvolatile memory (EEPROM)
to return the wiper to its previously stored position upon
power-up.
The MAX5471/MAX5472 are 2-terminal, variable resistors
in 6-pin SOT23 packages. The MAX5474/MAX5475 are
3-terminal potentiometers in 8-pin SOT23 packages.
The MAX5471/MAX5474 have an end-to-end resistance
of 50kΩ, and the MAX5472/MAX5475 have an end-
to-end resistance of 100kΩ. All of these devices have
32 wiper positions, a low ratiometric temperature coeffi-
cient (5ppm/°C), and all operate from a single +2.7V to
+5.25V supply. Each device is guaranteed over the
extended -40°C to +85°C temperature range.
Applications
Mechanical Potentiometer Replacement
Liquid-Crystal-Display (LCD) Screen Adjustment
Audio Volume Control
Programmable Filters
Features
♦ Wiper Position Stored in Nonvolatile Memory and
Recalled Upon Power-Up
♦ Tiny SOT23 Package
♦ 35ppm/°C End-to-End Resistance Temperature
Coefficient
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ 32 Tap Positions
♦ Voltage-Divider or Variable-Resistor
Potentiometer Configuration
♦ 50kΩ and 100kΩ End-to-End Resistance Values
♦ 1µA (max) Static Supply Current
♦ 2.7V to 5.25V Single-Supply Operation
♦ 200,000 Wiper Store Cycles
♦ 50-Year Wiper Data Retention
MAX5471/MAX5472/MAX5474/MAX5475
32-Tap, Nonvolatile, Linear-Taper Digital
Potentiometers in SOT23
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-3067; Rev 1; 2/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART
TEMP
RANGE
PIN-PACKAGE
PKG
CODE
M A X5 4 7 1 E Z T- T- 40° C to + 85° C 6 Thin SOT23-6 Z6-1
M A X5 4 7 2 E Z T- T- 40° C to + 85° C 6 Thin SOT23-6 Z6-1
M A X5 4 7 4 E KA- T- 40° C to + 85° C 8 SOT23-8 K8S-3
M A X5 4 7 5 E KA- T- 40° C to + 85° C 8 SOT23-8 K8S-3
TOP VIEW
L
GND
H
INC
W
1
GND
SOT23-6
SOT23-8
2
3
6
5
4
CS
U/D
U/D
MAX5471
MAX5472
1
V
DD
V
DD
H
2
3
8
7
6
CS
MAX5474
MAX5475
4
5
INC
Pin Configurations
PART
END-TO-END
RESISTANCE (kΩ)
TOP MARK
MAX5471EZT 50 ABQN
MAX5472EZT 100 ABQM
MAX5474EKA 50 AEIZ
MAX5475EKA 100 AEIY
Selector Guide
MAX5471/MAX5472/MAX5474/MAX5475
32-Tap, Nonvolatile, Linear-Taper Digital
Potentiometers in SOT23
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.25V, V
H
= V
DD
, V
L
= GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
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.
V
DD
to GND...........................................................-0.3V to +6.0V
All Other
Pins to GND .........-0.3V to the lower of (V
DD
+ 0.3V) or +6.0V
Maximum Continuous Current into H, L, and W
MAX5471/MAX5474 .....................................................±1.3mA
MAX5472/MAX5475 .....................................................±0.6mA
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 9.1mW/°C above +70°C)............727mW
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC PERFORMANCE
Resolution N 32 Tap
MAX5471/MAX5474 37.5 50 62.5
End-to-End Resistance
MAX5472/MAX5475 75 100 125
kΩ
End-to-End Resistance
Temperature Coefficient
TC
R
35 ppm/°C
Ratiometric Resistance
Temperature Coefficient
5 ppm/°C
Variable-resistor mode (Note 2) ±0.5 ±1.0
Integral Nonlinearity INL
Voltage-divider mode (MAX5474/MAX5475)
(Note 3)
±0.1 ±0.5
LSB
Variable-resistor mode (Note 2) ±0.5 ±1.0
Differential Nonlinearity DNL
Voltage-divider mode (MAX5474/MAX5475)
(Note 3)
±0.1 ±0.5
LSB
Full-Scale Error MAX5474/MAX5475 -0.5 LSB
Zero-Scale Error MAX5474/MAX5475 +0.5 LSB
Wiper Resistance R
W
MAX5474/MAX5475 (Note 4) 600 1200 Ω
DIGITAL INPUTS (CS, U/D, INC) (Note 5)
V
DD
< 3.6V 0.7 x V
DD
Input High Voltage V
IH
V
DD
≥ 3.6V 2.4
V
V
DD
< 3.6V 0.3 x V
DD
Input Low Voltage V
IL
V
DD
≥ 3.6V 0.8
V
Input Current I
IN
±0.1 ±1 µA
DYNAMIC CHARACTERISTICS
MAX5471/MAX5474 400
Wiper -3dB Bandwidth (Note 6)
MAX5472/MAX5475 200
kHz
MAX5471/MAX5472/MAX5474/MAX5475
32-Tap, Nonvolatile, Linear-Taper Digital
Potentiometers in SOT23
_______________________________________________________________________________________ 3
Note 1: All devices are production tested at T
A
= +25°C and are guaranteed by design and characterization for -40°C < T
A
< +85°C.
Note 2: The DNL and INL are measured with the potentiometer configured as a variable resistor. For the 3-terminal potentiometers
(MAX5474/MAX5475), H is unconnected and L = GND. At V
DD
= 5.25V, W is driven with a source current of 80µA for the
50kΩ configuration, and 40µA for the 100kΩ configuration. At V
DD
= 2.7V, the wiper terminal is driven with a source current
of 40µA for the 50kΩ configuration, and 20µA for the 100kΩ configuration.
Note 3: The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = V
DD
and L = GND
(MAX5474/MAX5475 only). The wiper terminal is unloaded.
Note 4: The wiper resistance is the worst value measured by injecting the currents given in Note 2 into W with L = GND.
R
W
= (V
W
- V
H
) / I
W
.
Note 5: The device draws higher supply current when digital inputs are driven with voltages between 0.3V x V
DD
and 0.7 x V
DD
.
Drive the digital inputs as close as possible to V
DD
or GND. (See the Typical Operating Characteristics for the Supply
Current vs. Digital Input Voltage graph.)
Note 6: Wiper at midscale with a 10pF load.
Note 7: Digital timing is guaranteed by design and characterization, and is not production tested.
Note 8: Wiper settling time is the worst-case 0% to 50% rise time measured between consecutive wiper positions. H = V
DD
, L =
GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see the Typical Operating
Characteristics for the Tap-to-Tap Switching Transient).
Note 9: Digital inputs CS, U/D, and INC are connected to GND or V
DD
. See the Typical Operating Characteristics for the Static
Supply Current vs. Temperature graph.
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.25V, V
H
= V
DD
, V
L
= GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TIMING CHARACTERISTICS (Figure 1, Note 7)
CS to INC Setup t
CI
50 ns
INC High to U/D Change t
ID
0ns
U/D to INC Setup t
DI
100 ns
INC Low Period t
IL
50 ns
INC High Period t
IH
50 ns
INC Cycle Time t
CYC
100 ns
INC Inactive to CS Inactive t
IC
100 ns
INC Active to CS Inactive t
IK
100 ns
CS Deselect Time (Store) t
CPH
100 ns
Wiper Settling Time t
IW
(Note 8) 1 µs
Power-Up to Wiper Stable t
PU
1µs
Wiper Store Cycle t
WSC
12 ms
NONVOLATILE MEMORY RELIABILITY
Data Retention T
A
= +85°C 50 Year
T
A
= +25°C 200,000
Endurance
T
A
= +85°C 50,000
Store
POWER SUPPLY
Supply Voltage V
DD
2.70 5.25 V
Supply Current I
DD
Write to memory 400 µA
Static Supply Current I
SD
T
A
= +25°C (Note 9) 0.35 1 µA
P1-P3P4-P6P7-P9P10-P12

MAX5472EZT+T

Mfr. #:
Buy MAX5472EZT+T
Manufacturer:
Maxim Integrated
Description:
Digital Potentiometer ICs 32-Tap Nonvolatile Linear-Taper
Lifecycle:
New from this manufacturer.
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