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Maxim > Products > [Digital Potentiometers] 
DS1856
Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 1.3MB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

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.

An evaluation kit is available:  DS185XEVKIT  

Key Features   Applications/Uses
  • SFF-8472 Compatible
  • Five Monitored Channels (Temperature, VCC, 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

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

    Key Specifications:  Fiber Monitoring and Control
    Part Number Features ADCs Resolution
    (bits)    		 DACs/ Resistors FS Out
    (kΩ)    		 Steps Temp. Sensor Memory VSUPPLY
    (V)    		 Control Interface EV Kit Price
    See Notes
    DS1856 
    Alarm/Warning Flags
    Complies or Compatible to SFF-8472
    External Calibration
    Internal Calibration
    Look-Up Table Compensation
    Scalable Dynamic Ranging (Right Shifting)
    User EEPROM
    		 5-Input Muxable 12 2 Resistors
    20kohms
    50kohms
    		 256 Internal EEPROM
    3.3
    5
    		 I2C Yes $2.38 @1k
    See All Fiber Monitoring and Control (12)

    Diagram
    DS1856: Typical Operating Circuit
    Typical Operating Circuit

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

    Evaluation Kits
  		• DS185XEVKIT

    Reliability Reports
  		• Reliability Report: DS1856.pdf

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * 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: 1-30 of 30

    DS1856 Notes Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/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
    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/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-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/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-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
    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-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-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
    DS1856E-P50+    
    		Active TSSOP;16 pin;33 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 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 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    
    		Active TSSOP;16 pin;33 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 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   20kohms  
    		Active TSSOP;16 pin;33 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/T&R   20kohms  
    		Active TSSOP;16 pin;33 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/T&R   50kohms  
    		Active TSSOP;16 pin;33 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 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 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 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+  
    		Active TSSOP;16 pin;33 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+  
    		Active TSSOP;16 pin;33 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 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

    Related Products
    DS1858 Dual Temperature-Controlled Resistors with Three Monitors
    DS1859 Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors

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    2006-02-27
    This page last modified: 2009-02-10


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