DS1841

更新时间： 2024-09-27 04:39:11

品牌	Logo	应用领域
美信 - MAXIM		电阻器
页数	文件大小	规格书
16页	252K
描述
Temperature-Controlled, NV, I2C, Logarithmic Resistor

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DS1841 数据手册

Rev 0; 11/07

Temperature-Controlled, NV, I C,

Logarithmic Resistor

DS841

General Description

Features

The DS1841 is a 7-bit, logarithmic, nonvolatile (NV) digi-

tal resistor that features an on-chip temperature sensor

and associated analog-to-digital converter (ADC). The

integrated temperature sensor indexes a 72-byte NV

lookup table (LUT) encompassing a temperature range

from -40°C to +100°C. The LUT output can drive the

resistor directly or be added to an NV initial-value regis-

ter (IVR) to drive the resistor. This flexible LUT-based

architecture allows the DS1841 to provide a tempera-

ture-compensated resistor output with arbitrary slope.

Programming is accomplished by an I²C-compatible

interface, which can operate at speeds of up to 400kHz.

♦ 22kΩ to 3.7kΩ Adjustable Logarithmic Resistor

with a 3.6kΩ Fixed Resistor

♦ 128 Wiper Tap Points

♦ On-Chip Temperature Sensor and ADC

♦ 72-Byte Lookup Table (LUT)

♦ I C-Compatible Serial Interface

♦ Address Pins Allow Up to Four DS1841s to Share

the Same I C Bus

♦ Digital Supply of 2.7V to 5.5V

♦ -40°C to +100°C Operating Range

♦ 3mm x 3mm, 10-Pin TDFN Package

Applications

Optical Transceivers

Ordering Information

Linear and Nonlinear Compensation

Instrumentation and Industrial Controls

Mechanical Potentiometer Replacement

PART

DS1841T+

DS1841T+T&R

TEMP RANGE

PIN-PACKAGE

-40°C to +100°C 10 TDFN

+Denotes a lead-free package.

T&R = Tape and reel.

Registers and Modes are capitalized for clarity.

Typical Operating Circuit

Pin Configuration

TOP VIEW

3.3V

SCL N.C. RH RW RGND

4.7kΩ

APD

4.7kΩ

OUT

SDA

SCL

0.1μF

DC-DC

GND

CONVERTER

DS1841

*EP

DS1841

100pF

SDA GND

RGND

TDFN

3.0mm × 3.0mm × 0.8mm

APD BIAS CONTROL APPLICATION

*EXPOSED PAD

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...16

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与DS1841相关器件

型号	品牌	获取价格	描述	数据表
DS1841N+	MAXIM	获取价格	Digital Potentiometer, PDSO10,
DS1841N+TR	MAXIM	获取价格	Digital Potentiometer, PDSO10,
DS1841T+	MAXIM	获取价格	Temperature-Controlled, NV, I2C, Logarithmic Resistor
DS1841T+T&R	MAXIM	获取价格	Digital Potentiometer, 1 Func, 22000ohm, 2-wire Serial Control Interface, 128 Positions, 3
DS1841T+T&R	MAXIM	获取价格	Temperature-Controlled, NV, I2C, Logarithmic Resistor
DS1841T+TR	MAXIM	获取价格	Temperature-Controlled, NV, I2C, Logarithmic Resistor
DS1841X	MAXIM	获取价格	Digital Potentiometer,
DS1842	MAXIM	获取价格	76V, APD, Bias Output Stage with Current Monitoring
DS1842	ADI	获取价格	76V、APD偏置输出级，提供电流监测
DS1842_11	MAXIM	获取价格	76V, APD, Bias Output Stage with Current Monitoring