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DS1857
Dual Temperature-Controlled Resistors with External Temperature Input and Monitors
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Status
Active: In Production.
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.
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Data Sheet
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An evaluation kit is available: DS1854EVKIT, DS1857EVKIT, DS1858EVKIT, DS1859EVKIT, DS185XEVKIT
Key Features
- 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
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Applications/Uses
- Diagnostic Monitoring
- Instrumentation and Industrial Controls
- Optical Transceivers
- Optical Transponders
- RF Power Amps
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Key Specifications:
| Fiber Monitoring and Control |
| Part Number |
ADCs |
Resolution
(bits) |
DACs/ Resistors |
FS Out
(kΩ) |
Steps |
Temp. Sensor |
Memory |
VSUPPLY
(V) |
Control Interface |
EV Kit |
Budgetary Price |
| See Notes |
| DS1857 |
4-Input Muxable |
12 |
2 Resistors |
50kohms |
256 |
External |
EEPROM |
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2-Wire |
Yes |
$4.12 @1k |
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See All Fiber Monitoring and Control (19)
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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.
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Diagram
Typical Operating Circuit
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Notes |
Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS1857B-050
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50kohms |
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Active |
CSBGA;16 pin;16 mm²
Outline Drawing:21-0355 (PDF)
Land Pattern: 90-0334 (PDF)
Use pkgcode/variation: X16-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS1857B-050+
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Active |
CSBGA;16 pin;16 mm²
Outline Drawing:21-0355 (PDF)
Land Pattern: 90-0334 (PDF)
Use pkgcode/variation: X16+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS1857E-050
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50kohms |
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Active |
TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS1857E-050+
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Active |
TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16+1*
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-40°C to +85°C
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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.
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Similar Products by Function
| 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 |
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More Information
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Information Index
Rev 2;
2004-06-07
This page last modified: 2009-10-13
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