General Description

The DS3501 is a 7-bit, nonvolatile (NV) digital poten-

tiometer featuring an output voltage range of up to 15.5V.

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

External voltages are applied at the RL and RH inputs to

define the lowest and highest potentiometer outputs.

The DS3501 contains an on-chip temperature sensor

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

ADC output addresses a 36-word NV lookup table

(LUT). The LUT output can drive the pot directly or be

added to an NV initial-value register (IVR) to drive the

pot. This flexible LUT-based architecture allows the

DS3501 to provide a temperature-compensated poten-

tiometer output with arbitrary slope.

Applications

Linear and Nonlinear Compensation

Instrumentation and Industrial Controls

Mechanical POT Replacement

Optical Transceivers

Features

♦ 128 Wiper Tap Points

♦ Full-Scale Resistance: 10kΩ

♦ On-Chip Temperature Sensor and ADC

♦ 36-Byte Lookup Table (LUT)

♦ Address Pins Allow Up to Four DS3501s to Share

♦ Digital Operating Voltage: 2.7V to 5.5V

♦ Analog Operating Voltage: 4.5V to 15.5V

♦ Operating Temperature: -40°C to +100°C

♦ Pin and Software Compatible with ISL95311

(Default Mode)

♦ 10-Pin μSOP Package

and Lookup Table

______________________________________________

Maxim Integrated Products

1

Rev 0; 1/07

+

Denotes a lead-free package.

T&R denotes tape-and-reel.

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

DS3501U+

-40°C to +100°C

10 µSOP

DS3501U+T&R

-40°C to +100°C

10 µSOP

VOLATILE

WIPER REGISTER

NV IVR

36-BYTE

LUT

NV

MEMORY

CONTROL

CIRCUITRY

AND ADDRESS

DECODE

TEMP

SENSOR

AND ADC

A1

A0

SDA

SCL

∑

DECODER

LEVEL

SHIFTER

127

126

125

2

1

0

RH

RL

RW

DS3501

Functional Diagram

Pin Configuration and Typical Operating Circuit appear at

end of data sheet.

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.