參數(shù)資料
型號： MAX5479ETE#TG16
廠商： Maxim Integrated Products
文件頁數(shù)： 1/16頁
文件大?。?/td> 0K
描述： IC POT DGTL DUAL 256-TAP 16-TQFN
產(chǎn)品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 2,500
接片： 256
電阻（歐姆）： 100k
電路數(shù)： 2
溫度系數(shù)： 標準值 70 ppm/°C
存儲器類型： 非易失
接口： I²C（設備位址）
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： 16-WFQFN 裸露焊盤
供應商設備封裝： 16-TQFN（3x3）
包裝： 帶卷 (TR)
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: 10k
(MAX5477), 50k
(MAX5478), or 100k
(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
Features
o Power-On Recall of Wiper Position from
Nonvolatile Memory
o EEPROM Write Protection
o Tiny 3mm x 3mm x 0.8mm Thin QFN Package
o 70ppm/°C End-to-End Resistance Temperature
Coefficient
o 10ppm/°C Ratiometric Temperature Coefficient
o Fast 400kbps I2C-Compatible Serial Interface
o 1A (max) Static Supply Current
o Single-Supply Operation: +2.7V to +5.25V
o 256 Tap Positions per Potentiometer
o ±0.5 LSB DNL in Voltage-Divider Mode
o ±1 LSB INL in Voltage-Divider Mode
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile,
I2C-Interface, Digital Potentiometers
________________________________________________________________
Maxim Integrated Products
1
19-3379; Rev 5; 11/11
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.
Pin Configurations appear at end of data sheet.
EVALUATION
KIT
AVAILABLE
Ordering Information/Selector Guide
PART
TEMP RANGE
PIN-PACKAGE
END-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.
*
EP = Exposed pad.
Functional Diagram
MAX5477
MAX5478
MAX5479
8-BIT
SHIFT
REGISTER
POR
16-BIT
LATCH
16-BIT
NV
MEMORY
SDA
SCL
WP
A0
A1
A2
8
256
POSITION
DECODER
8
256
POSITION
DECODER
256
HA
WA
LA
HB
WB
LB
VDD
GND
I
2C
INTERFACE
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MAX5479EUD-T 功能描述:數(shù)字電位計 IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
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