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參數(shù)資料
| 型號： | MAX5434PEZT+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DGTL POT 32POS 50K SOT23-6 |
| 產(chǎn)品培訓(xùn)模塊： | Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 接片： | 32 |
| 電阻（歐姆）： | 50k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 35 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： | SOT-23-6 細(xì)型，TSOT-23-6 |
| 供應(yīng)商設(shè)備封裝： | TSOT-23-6 |
| 包裝： | 帶卷 (TR) |
MAX5432–MAX5435
32-Tap, Nonvolatile, I2C, Linear, Digital
Potentiometers
8
_______________________________________________________________________________________
Detailed Description
The MAX5432–MAX5435 contain a resistor array with
31 resistive elements. The MAX5432/MAX5434 provide
a total end-to-end resistance of 50k
, and the
MAX5433/MAX5435 provide an end-to-end resistance
of 100k
.
The MAX5432/MAX5433 allow access to the high, low,
and wiper terminals for a standard voltage-divider con-
figuration. Connect H, L, and W in any desired configu-
ration as long as their voltages fall between GND and
VDD. The MAX5434/MAX5435 are variable resistors
with H internally connected to the wiper.
A simple 2-wire I2C-compatible serial interface moves
the wiper among the 32 tap points. Eight data bits, an
address byte, and a control byte program the wiper
position. A nonvolatile memory stores and recalls the
wiper position in the nonvolatile memory upon power-up.
The nonvolatile memory is guaranteed for 200,000 wiper
store cycles and 50 years for wiper data retention.
Digital Interface
The MAX5432–MAX5435 feature an internal, nonvolatile
EEPROM that returns the wiper to its previously stored
position at power-up. The shift register decodes the
control and address bits, routing the data to the proper
memory registers. Write data to the volatile memory
register to immediately update the wiper position, or
write data to the nonvolatile register for storage. Writing
to the nonvolatile register takes a minimum of 12ms.
The volatile register retains data as long as the device
is enabled and powered. Removing power clears the
volatile register. The nonvolatile register retains data
even after power is removed. Upon power-up, the
power-on reset circuitry and internal oscillator control
the transfer of data from the nonvolatile register to the
volatile register.
Serial Addressing
The MAX5432–MAX5435 operate as a slave that sends
and receives data through an I2C- and SMBus-com-
patible 2-wire interface. The interface uses a serial data
access (SDA) line and a serial clock line (SCL) to
achieve bidirectional communication between
master(s) and slave(s). A master, typically a microcon-
troller, initiates all data transfers to and from the
MAX5432–MAX5435, and generates the SCL clock that
synchronizes the data transfer (Figure 1).
SDA operates as both an input and an open-drain out-
put. SDA requires a pullup resistor, typically 4.7k
.
SCL only operates as an input. SCL requires a pullup
resistor (4.7k
typ) if there are multiple masters on the
2-wire interface, or if the master in a single-master sys-
tem has an open-drain SCL output.
Each transmission consists of a START (S) condition
(Figure 3) sent by a master, followed by the
MAX5432–MAX5435 7-bit slave address plus the 8th bit
(Figure 4), 1 command byte (Figure 7) and 1 data byte,
and finally a STOP (P) condition (Figure 3).
Start and Stop Conditions
Both SCL and SDA remain high when the interface is
not busy. A master signals the beginning of a transmis-
sion with a START (S) condition by transitioning SDA
from high to low while SCL is high. When the master
has finished communicating with the slave, it issues a
STOP (P) condition by transitioning the SDA from low to
Pin Description
PIN
TDFN
THIN SOT23
NAME
FUNCTION
1
—
H
High Terminal
2
4
SDA
I2C-Compatible Interface Data Input
3
2
GND
Ground
4
3
SCL
I2C-Compatible Interface Clock Input
51
VDD
Power-Supply Input. Bypass with a 0.1F capacitor from VDD to GND.
6
—
A0
Address Input. Sets the I2C address. Connect to VDD or GND. Do not leave A0 floating.
7
6
L
Low Terminal
8
5
W
Wiper Terminal
EP
—
EP
Exposed Pad. Internally connected to GND.
SMBus is a trademark of Intel Corporation.
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| MAX5435LEZT+T | 功能描述:數(shù)字電位計(jì) IC 32-Tap Nonvolatile I2C Linear 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 |
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