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081502

SDA

1

14

Vcc

SCL

2

13

H0

A0

3

12

NC

A1

4

11

H1

A2

5

10

L1

WP

6

9

NC

GND

7

8

L0

14-Pin TSSOP (173-mil)

A

B

C

D

1

2

3

4

Top View

FEATURES

§ Two linear taper, temperature-controlled

variable resistors

§ DS1848-050

- One 50kW, 256 position

- One 10kW, 256 position

§ DS1848-010

- Two 10kW, 256 position

§ Resistor settings changeable every 2°C

§ Access to temperature data and device

control via a 2-wire interface

§ Operates from 3V or 5V supplies

§ Packaging: 14-pin TSSOP, 16-ball CSBGA

§ Operating temperature: -40ºC to +95ºC

§ Programming temperature: 0ºC to +70ºC

§ 128 bytes of user EEPROM

PIN ASSIGNMENT

DESCRIPTION

The DS1848 Dual Temperature-Controlled Nonvolatile (NV) Variable Resistor consists of two 256-

position linear, variable resistors. The DS1848-050 consists of one 10k

W and one 50kW, while the

DS1848-010 consists of two 10k

W resistors; both incorporate a direct-to-digital temperature sensor. The

device provides an ideal method for setting and temperature-compensating bias voltages and currents in

control applications using a minimum of circuitry.

The variable resistors settings are stored in EEPROM memory and can be accessed over the industry

standard 2-wire serial bus. The value of each variable resistor is determined by a temperature-addressed

look-up table, which can assign a unique value to each resistor for every 2°C increment over the -40°C to

+95°C range. The output of the digital temperature sensor is also available as a 13-bit, 2’s complement

value over the serial bus. The interface I/O pins consist of SDA and SCL.

DS1848

Dual Temperature-Controlled

NV Variable Resistor & Memory

www.maxim-ic.com

16-Ball CSBGA (4mm x 4mm)