QuickView

Technical Documents

Ordering Info

More Information

User Comments (0)

All

Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 824kB) Download   E-Mail

Description

The DS1857 dual temperature-controlled nonvolatile (NV) variable resistors with external temperature input and monitors consists of two 50kΩ 256-position linear variable resistors, two analog monitor inputs (MON1,MON2), and an external temperature sensor input. The device provides an ideal method for setting and temperature compensating bias voltages and currents in control applications using minimal circuitry. The variable resistor settings are stored in EEPROM memory and can be accessed over the 2-wire serial bus.

Key Features		Applications/Uses
Four Total Monitored Channels (Temperature, VCC, MON1, MON2) Two External Analog Inputs (MON1, MON2) Interface to External Temperature Sensor (LM50) Two 50kΩ, Linear, 256-Position, Nonvolatile Temperature-Controlled Variable Resistors Resistor Settings Changeable Every 2°C Access to Monitoring and ID Information Configurable with Separate Device Addresses Resistor Disable (Open-Circuit) Function 2-Wire Serial Interface Three Address Lines for Multiple Devices Operates from a 3.3V or 5V Supply SFF-8472 Compatible		Diagnostic Monitoring Instrumentation and Industrial Controls Optical Transceivers Optical Transponders RF Power Amps

Diagram

Typical Operating Circuit

Application Notes

Application Note 166: Interfacing Digitally Controlled Potentiometers and Resistors to Laser Drivers - DS1857 Application Note 174: Monitor Calibration in Fiber Optic Applications - DS1857 Application Note 228: How to Interpret DS1854, DS1857, and DS1858 Temperature and Voltage Readings - DS1857 Application Note 3481: Using the DS1859 with External EEPROM - DS1857

Design Guides

Fiber (PDF) Communications (PDF) Digital Potentiometers (PDF)

Reliability Reports

Reliability Report: DS1857.pdf

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

DS1857	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1857B-050+				Active	CSBGA;16 pin;16 mm² Outline Drawing: 21-0355 (PDF) Land Pattern: 90-0334 (PDF) Use pkgcode/variation: X16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1857B-050	50kohms			Active	CSBGA;16 pin;16 mm² Outline Drawing: 21-0355 (PDF) Land Pattern: 90-0334 (PDF) Use pkgcode/variation: X16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS1857E-050+				Active	TSSOP;16 pin;33.4 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1857E-050	50kohms			Active	TSSOP;16 pin;33.4 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

More Information

Evaluation Kit: DS185XEVKIT

Related Products

DS1845 Dual NV Potentiometer and Memory DS1847 Dual Temperature-Controlled NV Variable Resistor DS1848 Dual Temperature-Controlled NV Variable Resistor & Memory DS1855 Dual Nonvolatile Digital Potentiometer and Secure Memory DS1852 Optical Transceiver Diagnostic Monitor More Like This: View Product Families for Similar Products See All Fiber Monitoring and Control (12 Products)

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers Parametric Search Applications Help

QuickView

Technical Documents

Ordering Info

More Information

Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

Related Products   Notes and Comments   Evaluation Kits