MAX5423ETA+T Maxim Integrated Products, MAX5423ETA+T Datasheet

IC POT DGTL 256-TAP NV 8-TDFN

MAX5423ETA+T

Manufacturer Part Number
MAX5423ETA+T
Description
IC POT DGTL 256-TAP NV 8-TDFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5423ETA+T

Taps
256
Resistance (ohms)
100K
Number Of Circuits
1
Temperature Coefficient
35 ppm/°C Typical
Memory Type
Non-Volatile
Interface
SPI, 3-Wire Serial
Voltage - Supply
2.7 V ~ 5.25 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-TDFN Exposed Pad
Resistance In Ohms
100K
Number Of Pots
Single
Taps Per Pot
256
Resistance
100 KOhms
Wiper Memory
Non Volatile
Digital Interface
Serial (3-Wire, SPI)
Operating Supply Voltage
5 V
Supply Current
0.001 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Description/function
100kOhm, 256-Tap, Nonvolatile, SPI-Interface Digital Potentiometer
Mounting Style
SMD/SMT
Supply Voltage (max)
5.25 V
Supply Voltage (min)
2.7 V
Tolerance
25 %
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX5423ETA+T
MAX5423ETA+TTR
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.
19-3371; Rev 0; 7/04
*EP = Exposed pad.
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.
MAX5422ETA
MAX5423ETA
MAX5424ETA
SCLK
GND
V
DIN
CS
DD
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifiers
Audio Volume Control
Liquid-Crystal Display (LCD) Contrast Control
Low-Drift Programmable Filters
PART
INTERFACE
REGISTER
SHIFT
8-BIT
SPI
8
________________________________________________________________ Maxim Integrated Products
POR
General Description
Functional Diagram
MEMORY
LATCH
8-BIT
8-BIT
NV
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
256-Tap, Nonvolatile, SPI-Interface,
8
POSITION
DECODER
Applications
MAX5422
MAX5423
MAX5424
256-
256
RESISTANCE (kΩ)
H
W
L
END-TO-END
100
200
Ordering Information/Selector Guide
50
♦ Wiper Position Stored in Nonvolatile Memory
♦ 3mm x 3mm x 0.8mm TDFN Package
♦ 35ppm/°C End-to-End Resistance Temperature
♦ 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
SPI is a trademark of Motorola, Inc.
Digital Potentiometers
(EEPROM) and Recalled Upon Power-Up or
Interface Command
Coefficient
TOP VIEW
SCLK
V
DIN
PIN-PACKAGE
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
CS
DD
1
2
3
4
TDFN (3mm x 3mm)
MAX5422
MAX5423
MAX5424
Pin Configuration
8
7
6
5
TOP MARK
H
W
L
Features
GND
AIH
AIJ
AII
1

Related parts for MAX5423ETA+T

MAX5423ETA+T Summary of contents

Page 1

... MAX5423ETA -40°C to +85°C MAX5424ETA -40°C to +85°C *EP = Exposed pad. ________________________________________________________________ Maxim Integrated Products 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. Digital Potentiometers ♦ Wiper Position Stored in Nonvolatile Memory (EEPROM) and Recalled Upon Power-Up or Interface Command ♦ ...

Page 2

Nonvolatile, SPI-Interface, Digital Potentiometers ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................-0.3V to +6.0V DD All Other Pins to GND.................................-0. Maximum Continuous Current into H, L, and W MAX5422......................................................................±1.3mA MAX5423......................................................................±0.6mA MAX5424......................................................................±0.3mA Stresses beyond those listed under “Absolute Maximum ...

Page 3

Nonvolatile, SPI-Interface, ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.25V GND PARAMETER SYMBOL DIGITAL INPUTS (CS, DIN, SCLK) Input High Voltage (Note 4) Input Low Voltage Input Leakage Current Input ...

Page 4

Nonvolatile, SPI-Interface, Digital Potentiometers TIMING CHARACTERISTICS (continued +2.7V to +5.25V GND noted. See Figure 1.) (Note 7) PARAMETER SYMBOL DIN Hold after SCLK SCLK Rise to CS Fall ...

Page 5

Nonvolatile, SPI-Interface 5.0V +25°C, unless otherwise noted WIPER TRANSIENT AT POWER-ON MAX5422 toc04 V 1V/div W 1V/div C = 10pF L TAP = 128 4μs/div MAXIMUM WIPER RESISTANCE vs. ...

Page 6

Nonvolatile, SPI-Interface, Digital Potentiometers (V = 5.0V +25°C, unless otherwise noted INL vs. TAP POSITION (MAX5423) 2.0 VARIABLE-RESISTOR MODE V = 2. 20μA SRC 1.0 0.5 0 -0.5 -1 ...

Page 7

Nonvolatile, SPI-Interface, PIN NAME 1 V Power-Supply Input. Bypass SCLK Serial-Interface Clock Input 3 DIN Serial-Interface Data Input CS 4 Active-Low Digital-Input Chip Select 5 GND Ground Low Terminal. The voltage at L can be greater ...

Page 8

Nonvolatile, SPI-Interface, Digital Potentiometers (CS), data clock (SCLK), and data in (DIN). Drive CS low to enable the serial interface and clock data syn- chronously into the shift register on each SCLK rising edge. The WRITE commands (C1, C0 ...

Page 9

Nonvolatile, SPI-Interface, Write Wiper Register Data written to this register (C1 00) controls the wiper positions. The 8 data bits (D7 to D0) indicate the position of the wiper. For example, if DIN = 0000 0000, the ...

Page 10

Nonvolatile, SPI-Interface, Digital Potentiometers Programmable Filter Figure 5 shows the configuration for a 1st-order pro- grammable filter. The gain of the filter is adjusted by R2, and the cutoff frequency is adjusted by R3. Use the following equations to ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2004 Maxim Integrated Products ...

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