Maxim > Products > Digital Potentiometers > DS1856

DS1856

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The DS1856 dual, temperature-controlled, nonvolatile (NV) variable resistors with three monitors consists of two 256-position, linear, variable resistors; three analog monitor inputs (MON1, MON2, MON3); and 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 minimal circuitry. The variable resistor settings are stored in EEPROM memory and can be accessed over the 2-wire serial bus.

Relative to other members of the family, the DS1856 is essentially a DS1859 with a DS1852-friendly memory map. In particular, the DS1856 can be configured so the 128 bytes of internal Auxiliary EEPROM memory is mapped into Main Device Table 00h and Table 01h, maintaining compatibility between both the DS1858/DS1859 and the DS1852. The DS1856 also features password protection equivalent to the DS1852, further enhancing compatibility between the two.

Data Sheet

Download	Rev 1	(PDF, 1.3MB)
E-Mail

An evaluation kit is available: DS1854EVKIT, DS1857EVKIT, DS1858EVKIT, DS1859EVKIT, DS185XEVKIT

Key Features

SFF-8472 Compatible
Five Monitored Channels (Temperature, V_CC, MON1, MON2, MON3)
Three External Analog Inputs (MON1, MON2, MON3) That Support Internal and External Calibration
Scalable Dynamic Range for External Analog Inputs
Internal Direct-to-Digital Temperature Sensor
Alarm and Warning Flags for All Monitored Channels
Two Linear, 256-Position, Nonvolatile Temperature-Controlled Variable Resistors
Resistor Settings Changeable Every 2°C
Three Levels of Security
Access to Monitoring and ID Information Configurable with Separate Device Addresses
2-Wire Serial Interface
Two Buffers with TTL/CMOS-Compatible Inputs and Open-Drain Outputs
Operates from a 3.3V or 5V Supply
-40°C to +95°C Operating Temperature Range

Applications/Uses

Diagnostic Monitoring
Instrumentation and Industrial Controls
Optical Transceivers
Optical Transponders
RF Power Amps

Key Specifications:

Fiber Monitoring and Control

Part Number

ADCs

Resolution
(bits)

DACs/ Resistors

FS Out
(kΩ)

Steps

Temp. Sensor

Memory

V_SUPPLY
(V)

Control Interface

EV Kit

Budgetary Price

See Notes

DS1856

5-Input Muxable

2 Resistors

20kohms

50kohms

256

Internal

EEPROM

3.3

I²C

Yes

$1.36 @1k

See All Fiber Monitoring and Control (19)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Application Notes

Application Note 3391		How to Use the DS185xEVKIT to Evaluate the DS1856
Application Note 3408		DS1856 Internal Calibration and Right Shifting (Scalable Dynamic Ranging)
Application Note 3751		How to Program a Device Using the File Tab in the DS185XEVKIT
Application Note 3766		HFTA-12.0: Measuring Crosstalk Penalty in High-Speed Bidirectional Serial Communication Modules
Application Note 3953		Side-by-Side Comparison of Fiber-Monitoring and Control ICs

Reliability Reports

Reliability Report:

DS1856.pdf

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1856B-002				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
DS1856B-002/T&R				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
DS1856B-020	20kohms			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
DS1856B-020+				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
DS1856B-020+T&R				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
DS1856B-020/T&R	20kohms			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
DS1856B-025	25kohms			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
DS1856B-030				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
DS1856B-030+	30kohms			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
DS1856B-030+T&R	30kohms			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
Part Number	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1856B-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
DS1856B-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
DS1856B-050+T&R	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: Lead Free Materials Analysis
DS1856B-050/T&R	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
DS1856B-M50+				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
DS1856B-M50+T&R				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
DS1856B-P50+				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
DS1856B-P50+T&R				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
DS1856E-002				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
DS1856E-002/T&R				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
Part Number	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1856E-020	20kohms			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
DS1856E-020+				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
DS1856E-020+T&R				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
DS1856E-020/T&R	20kohms			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
DS1856E-030+	30kohms			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
DS1856E-030+T&R	30kohms			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
DS1856E-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
DS1856E-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
DS1856E-050+T&R				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
DS1856E-050/T&R	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
Part Number	Notes	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1856E-M50+				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
DS1856E-M50+T&R				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
DS1856E-P50+				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
DS1856E-P50+T&R				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

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

Similar Products by Function

DS1858	Dual Temperature-Controlled Resistors with Three Monitors
DS1859	Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors
See All Fiber Monitoring and Control (19 Products)

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Fiber Modules > Optical Controller/Monitors (for Temperature Compensation and Monitoring)

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Evaluation Kits

DS1854EVKIT, DS1857EVKIT, ...

Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Rev 1; 2006-02-27
This page last modified: 2009-02-10