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參數(shù)資料
| 型號： | MAX5477ETE#TG16 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DGTL DUAL 256-TAP 16-TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 接片： | 256 |
| 電阻（歐姆）： | 10k |
| 電路數(shù)： | 2 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 70 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | I²C（設(shè)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(yīng)商設(shè)備封裝： | 16-TQFN（3x3） |
| 包裝： | 帶卷 (TR) |
MAX5477/MAX5478/MAX5479
Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
10
______________________________________________________________________________________
Detailed Description
The MAX5477/MAX5478/MAX5479 contain two resistor
arrays with 255 elements in each array. The MAX5477
has a total end-to-end resistance of 10k
, the
MAX5478 has an end-to-end resistance of 50k
, and
the MAX5479 has an end-to-end resistance of 100k
.
The MAX5477/MAX5478/MAX5479 provide access to
the high, low, and wiper terminals for a standard volt-
age-divider configuration. Connect H_, L_, and W_ in
any desired configuration as long as their voltages
remain between GND and VDD.
A simple 2-wire I2C-compatible serial interface moves
the wiper among the 256 tap points (Figure 2). A non-
volatile memory stores the wiper position and recalls
the stored wiper position upon power-up. The non-
volatile memory is guaranteed for 50 years for wiper
data retention and up to 200,000 wiper store cycles.
Analog Circuitry
The MAX5477/MAX5478/MAX5479 consist of two resistor
arrays with 255 resistive elements; 256 tap points are
accessible to the wipers, along the resistor string
between H_ and L_. The wiper tap point is selected by
programming the potentiometer through the I2C inter-
face. An address byte, a command byte, and 8 data bits
program the wiper position for each potentiometer. The
H_ and L_ terminals of the MAX5477/MAX5478/
MAX5479 are similar to the two end terminals of a
mechanical potentiometer. The MAX5477/MAX5478/
MAX5479 feature power-on reset circuitry that loads the
wiper position from the nonvolatile memory at power-up.
256-POSITION
DECODER
H_
L_
R255
S255
S254
S3
S2
S1
S256
R254
R2
R1
W_
RW
WIPER
CODE 02h
Figure 2. Potentiometer Configuration
ADDRESS INPUTS
A2
A1
A0
SLAVE ADDRESS
GND
0101000
GND
VDD
0101001
GND
VDD
GND
0101010
GND
VDD
0101011
VDD
GND
0101100
VDD
GND
VDD
0101101
VDD
GND
0101110
VDD
0101111
Table 1. Slave Addresses
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| MAX5489ETE#TG16 | IC POT DGTL DUAL 256-TAP 16-TQFN |
| MAX5487ETE+T | IC POT DGTL DUAL 256-TAP 16-TQFN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5477EUD | 制造商:Maxim Integrated Products 功能描述:DUAL, 256-TAP, NONVOLATILE, I2C-INTERFACE, DI - Rail/Tube |
| MAX5477EUD+ | 功能描述:數(shù)字電位計(jì) IC Dual 256-Tap NV I2C-Interface 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5477EUD+T | 功能描述:數(shù)字電位計(jì) IC Dual 256-Tap NV I2C-Interface 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5477EUD-T | 制造商:Maxim Integrated Products 功能描述:DUAL, 256-TAP, NONVOLATILE, I2C-INTERFACE, DI - Tape and Reel |
| MAX5478ETD | 制造商:Maxim Integrated Products 功能描述:DUAL, 256-TAP, NONVOLATILE, I2C-INTERFACE, DI - Rail/Tube |
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