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參數(shù)資料
| 型號： | MAX5479EUD+T |
| 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 14TSSOP |
| 產品培訓模塊： | 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： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 14-TSSOP |
| 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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