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MAX5422ETA+T

P1-P3P4-P6P7-P9P10-P11
General Description
The MAX5422/MAX5423/MAX5424 nonvolatile, linear-
taper, digital potentiometers perform the function of a
mechanical potentiometer, but replace the mechanics
with a simple 3-wire SPI™-compatible digital interface.
Each device performs the same function as a discrete
potentiometer 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. The 3-wire SPI-compatible serial interface
allows communication at data rates up to 5MHz, mini-
mizing board space and reducing interconnection com-
plexity in many applications.
The MAX5422/MAX5423/MAX5424 provide three nomi-
nal resistance values: 50kΩ (MAX5422), 100kΩ
(MAX5423), or 200kΩ (MAX5424). The nominal resistor
temperature coefficient is 35ppm/°C end-to-end and
only 5ppm/°C ratiometric. This makes the devices ideal
for applications requiring a low-temperature-coefficient
variable resistor, such as low-drift, programmable gain-
amplifier circuit configurations.
The MAX5422/MAX5423/MAX5424 are available in a
3mm x 3mm 8-pin TDFN package, and are specified
over the extended -40°C to +85°C temperature range.
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifiers
Audio Volume Control
Liquid-Crystal Display (LCD) Contrast Control
Low-Drift Programmable Filters
Features
♦ Wiper Position Stored in Nonvolatile Memory
(EEPROM) and Recalled Upon Power-Up or
Interface Command
♦ 3mm x 3mm x 0.8mm TDFN Package
♦ 35ppm/°C End-to-End Resistance Temperature
Coefficient
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ 50kΩ, 100kΩ, and 200kΩ Resistor Values
♦ 5MHz SPI-Compatible Serial Interface
♦ 500nA (typ) Static Supply Current
♦ Single-Supply Operation: +2.7V to +5.25V
♦ 256 Tap Positions
♦ ±0.5 LSB DNL in Voltage-Divider Mode
♦ ±0.5 LSB INL in Voltage-Divider Mode
MAX5422/MAX5423/MAX5424
256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
________________________________________________________________ Maxim Integrated Products 1
Ordering Information/Selector Guide
19-3371; Rev 0; 7/04
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
END-TO-END
RESISTANCE (kΩ)
PIN-PACKAGE TOP MARK
MAX5422ETA -40°C to +85°C50
8 TDFN-EP*
AIJ
MAX5423ETA -40°C to +85°C 100
8 TDFN-EP*
AII
MAX5424ETA -40°C to +85°C 200
8 TDFN-EP*
AIH
V
DD
SCLK
DIN
GND
1
2
3
45
W
H
6
7
8
L
TDFN (3mm x 3mm)
TOP VIEW
CS
MAX5422
MAX5423
MAX5424
Pin Configuration
W
L
SPI
INTERFACE
256-
POSITION
DECODER
V
DD
GND
SCLK
8-BIT
NV
MEMORY
8-BIT
LATCH
8-BIT
SHIFT
REGISTER
POR
H
8
8
256
DIN
CS
MAX5422
MAX5423
MAX5424
Functional Diagram
SPI is a trademark of Motorola, Inc.
*EP = Exposed pad.
MAX5422/MAX5423/MAX5424
256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40°C to +85°C. Typical values are at V
DD
= +5.0V, T
A
= +25°C, unless otherwise noted.)
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 (V
DD
+ 0.3V)
Maximum Continuous Current into H, L, and W
MAX5422......................................................................±1.3mA
MAX5423......................................................................±0.6mA
MAX5424......................................................................±0.3mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW
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 (VOLTAGE-DIVIDER MODE)
Resolution N 256 Taps
Integral Nonlinearity INL (Note 1) ±0.5 LSB
Differential Nonlinearity DNL (Note 1) ±0.5 LSB
End-to-End Resistance
Temperature Coefficient
TC
R
35 ppm/°C
Ratiometric Resistance
Temperature Coefficient
5 ppm/°C
MAX5422 -0.6
MAX5423 -0.3Full-Scale Error
MAX5424 -0.15
LSB
MAX5422 0.7
MAX5423 0.35
Zero-Scale Error
MAX5424 0.18
LSB
DC PERFORMANCE (VARIABLE-RESISTOR MODE)
V
DD
= 3V ±3.0
Integral Nonlinearity
(Note 2)
INL
V
DD
= 5V ±1.5
LSB
V
DD
= 3V, MAX5422, -40°C ≤ T
A
≤ +85°C,
guaranteed monotonic
-1.0 +2.0
V
DD
= 3V, MAX5422, 0°C ≤ T
A
≤ +85°C,
guaranteed monotonic
-1.0 +1.2
V
DD
= 3V, MAX5423 ±1.0
V
DD
= 3V, MAX5424 ±1.0
Differential Nonlinearity
(Note 2)
DNL
V
DD
= 5V ±1.0
LSB
DC PERFORMANCE (RESISTOR CHARACTERISTICS)
Wiper Resistance R
W
V
DD
= 3V to 5.25V (Note 3) 325 675 Ω
Wiper Capacitance C
W
10 pF
MAX5422 37.5 50 62.5
MAX5423 75 100 125End-to-End Resistance
MAX5424 150 200 250
kΩ
MAX5422/MAX5423/MAX5424
256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40°C to +85°C. Typical values are at V
DD
= +5.0V, T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS (CS, DIN, SCLK)
V
DD
= 3.4V to 5.25V 2.4
Input High Voltage (Note 4) V
IH
V
DD
< 3.4V
0.7 x
V
DD
V
Input Low Voltage V
IL
V
DD
= 2.7V to 5.25V (Note 4) 0.8 V
Input Leakage Current I
IN
±0.1 ±1 µA
Input Capacitance C
IN
5pF
DYNAMIC CHARACTERISTICS
MAX5422 100
MAX5423 50
Wiper -3dB Bandwidth (Note 5)
MAX5424 25
kHz
NONVOLATILE MEMORY RELIABILITY
Data Retention T
A
= +85°C 50 Years
T
A
= +25°C 200,000
Endurance
T
A
= +85°C 50,000
Stores
POWER SUPPLY
Supply Voltage V
DD
2.70 5.25 V
Standby Current I
DD
Digital inputs = V
DD
or GND, T
A
= +25°C 0.5 1 µA
Programming Current I
PG
During nonvolatile write to memory; digital
inputs = V
DD
or GND (Note 6)
200 400 µA
TIMING CHARACTERISTICS
(V
DD
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40°C to +85°C. Typical values are at V
DD
= +5.0V, T
A
= +25°C, unless otherwise
noted. See Figure 1.) (Note 7)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG SECTION
MAX5422 400
MAX5423 600Wiper Settling Time (Note 8) t
S
MAX5424 1000
ns
DIGITAL SECTION
SCLK Frequency f
SCLK
5MHz
SCLK Clock Period t
CP
200 ns
SCLK Pulse-Width High t
CH
80 ns
SCLK Pulse-Width Low t
CL
80 ns
CS Fall to SCLK Rise Setup t
CSS
80 ns
SCLK Rise to CS Rise Hold t
CSH
0ns
DIN to SCLK Setup t
DS
50 ns
P1-P3P4-P6P7-P9P10-P11

MAX5422ETA+T

Mfr. #:
Buy MAX5422ETA+T
Manufacturer:
Maxim Integrated
Description:
Digital Potentiometer ICs 256-Tap Nonvolatile SPI-Interface
Lifecycle:
New from this manufacturer.
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