參數(shù)資料
型號(hào)： MAX5424ETA+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 1/11頁(yè)
文件大?。?/td> 0K
描述： IC POT DGTL 256-TAP NV 8-TDFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
接片： 256
電阻（歐姆）： 200k
電路數(shù)： 1
溫度系數(shù)： 標(biāo)準(zhǔn)值 35 ppm/°C
存儲(chǔ)器類型： 非易失
接口： 3 線串口
電源電壓： 2.7 V ~ 5.25 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 8-WDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 8-TDFN-EP（3x3）
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： MAX5424ETA+TDKR
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: 50k
Ω (MAX5422), 100kΩ
(MAX5423), or 200k
Ω (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 (k
Ω)
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
VDD
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
VDD
GND
SCLK
8-BIT
NV
MEMORY
8-BIT
LATCH
8-BIT
SHIFT
REGISTER
POR
H
8
256
DIN
CS
MAX5422
MAX5423
MAX5424
Functional Diagram
SPI is a trademark of Motorola, Inc.
*EP = Exposed pad.
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