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| 型号： | MAX5387LAUD+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/15页 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL 256-TAP 14TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 接片： | 256 |
| 电阻（欧姆）： | 10k |
| 电路数： | 2 |
| 温度系数： | 标准值 35 ppm/°C |
| 存储器类型： | 易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.6 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 管件 |
Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometer
MAX5387
_______________________________________________________________________________________ 9
Detailed Description
The MAX5387 dual, 256-tap, volatile, low-voltage linear
taper digital potentiometer offers three end-to-end resis-
tance values of 10kI, 50kI, and 100kI. The potenti-
ometer consists of 255 fixed resistors in series between
terminals H_ and L_. The potentiometer wiper, W_, is
programmable to access any one of the 256 tap points
on the resistor string.
The potentiometers are programmable independently of
each other. The MAX5387 features an I2C interface.
I2C Digital Interface
The I2C interface contains a shift register that decodes
the command and address bytes, routing the data to the
appropriate control registers. Data written to a control
register immediately updates the wiper position. Wipers
A and B power up in midposition, D[7:0] = 80H.
Serial Addressing
The MAX5387 operates as a slave device that receives
data through an I2C-/SMBusK-compatible 2-wire serial
interface. The interface uses a serial-data access (SDA)
line and a serial-clock line (SCL) to achieve bidirec-
tional communication between master(s) and slave(s). A
master, typically a microcontroller, initiates all data trans-
fers to the MAX5387, and generates the SCL clock that
synchronizes the data transfer (Figure 2).
The MAX5387 SDA line operates as both an input and
an open-drain output. The SDA line requires a pullup
resistor, typically 4.7kI. The MAX5387 SCL line oper-
ates only as an input. The SCL line requires a pullup
resistor (typically 4.7kI) if there are multiple masters on
the 2-wire interface, or if the master in a single-master
system provides an open-drain SCL output.
Each transmission consists of a START (S) condition
(Figure 3) sent by a master, followed by the MAX5387
7-bit slave address plus the NOP/W bit (Figure 6), 1
command byte and 1 data byte, and finally a STOP (P)
condition (Figure 3).
START and STOP Conditions
SCL and SDA remain high when the interface is inactive.
A master controller signals the beginning of a transmis-
sion with a START condition by transitioning SDA from
high to low while SCL is high. The master controller issues
a STOP condition by transitioning the SDA from low to
high while SCL is high, after finishing communicating with
the slave. The bus is then free for another transmission.
SMBus is a trademark of Intel Corp.
Figure 2. I2C Serial Interface Timing Diagram
SDA
SCL
START
CONDITION
(S)
tLOW
tBUF
tHIGH
tHD:STA
tSU:DAT
tR
tF
tSU:STD
REPEATED
START CONDITION
(Sr)
ACKNOWLEDGE (A)
STOP CONDITION
(P)
START CONDITION
(S)
tHD-DAT
tSU:DTA
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5387LAUD+ | 功能描述:数字电位计 IC Dl 256-Tap Volatile Linear Taper RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5387LAUD+T | 功能描述:数字电位计 IC Dl 256-Tap Volatile Linear Taper RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5387MAUD+ | 功能描述:数字电位计 IC Dl 256-Tap Volatile Linear Taper RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5387MAUD+T | 功能描述:数字电位计 IC Dl 256-Tap Volatile Linear Taper RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MAX5387MINIQU+ | 功能描述:数字电位计 IC MAX5387 Eval Kit RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
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