DS1857

Dual Temperature-Controlled Resistors with External Temperature Input and Monitors

Data Sheet (Rev. 2)
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Part Details

  • 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
DS1857
Dual Temperature-Controlled Resistors with External Temperature Input and Monitors
DS1857: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 5

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Hardware Ecosystem

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DS1852
Optical Transceiver Diagnostic Monitor
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Evaluation Kits

eval board
schematic 1
DS1859EVKIT

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

Buy Now View Details

Features and Benefits

  • Supports DS1854, DS1857, DS1858, and DS1859
  • Windows Software Allows Easy Access to Device Functionality and Handles 2-Wire Communication
  • ZIF Socket Allows All Four Device Types to be Evaluated from a Single Board
  • Software Allows User to Program Variable Resistors from a Text File
  • Real-Time Monitoring Software Continuously Monitors Temperature, VCC, Monitor Inputs, and Status Bytes
  • External Temperature Sensor Footprint for Evaluating the DS1857
  • EV Kit's Software can be Used to Configure or Monitor the Device in a Customer's Application Circuit

Product Details

The fiber optic monitor and control evaluation kit (EV kit) provides a hardware and software interface for evaluating the DS1854, DS1857, DS1858, and DS1859. The kit includes Microsoft Windows®-compatible software that performs the 2-wire functions required to change the device settings and monitor the device registers. In addition to the general communications functions provided by the software, it allows the resistors' temperature-addressed look-up tables to be programmed from a text file. The kit hardware includes test points that allow inputs to be connected to the external stimuli and outputs to be monitored by test equipment; jumpers can be used to configure the device for the customer's application.

Applications

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

eval board
schematic 2
DS185XEVKIT

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

Buy Now View Details

Features and Benefits

  • Supports DS1854, DS1857, DS1858, and DS1859
  • Windows Software Allows Easy Access to Device Functionality and Handles 2-Wire Communication
  • ZIF Socket Allows All Four Device Types to be Evaluated from a Single Board
  • Software Allows User to Program Variable Resistors from a Text File
  • Real-Time Monitoring Software Continuously Monitors Temperature, VCC, Monitor Inputs, and Status Bytes
  • External Temperature Sensor Footprint for Evaluating the DS1857
  • EV Kit's Software can be Used to Configure or Monitor the Device in a Customer's Application Circuit

Product Details

The fiber optic monitor and control evaluation kit (EV kit) provides a hardware and software interface for evaluating the DS1854, DS1857, DS1858, and DS1859. The kit includes Microsoft Windows®-compatible software that performs the 2-wire functions required to change the device settings and monitor the device registers. In addition to the general communications functions provided by the software, it allows the resistors' temperature-addressed look-up tables to be programmed from a text file. The kit hardware includes test points that allow inputs to be connected to the external stimuli and outputs to be monitored by test equipment; jumpers can be used to configure the device for the customer's application.

Applications

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

eval board
schematic 3
DS1858EVKIT

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

Buy Now View Details

Features and Benefits

  • Supports DS1854, DS1857, DS1858, and DS1859
  • Windows Software Allows Easy Access to Device Functionality and Handles 2-Wire Communication
  • ZIF Socket Allows All Four Device Types to be Evaluated from a Single Board
  • Software Allows User to Program Variable Resistors from a Text File
  • Real-Time Monitoring Software Continuously Monitors Temperature, VCC, Monitor Inputs, and Status Bytes
  • External Temperature Sensor Footprint for Evaluating the DS1857
  • EV Kit's Software can be Used to Configure or Monitor the Device in a Customer's Application Circuit

Product Details

The fiber optic monitor and control evaluation kit (EV kit) provides a hardware and software interface for evaluating the DS1854, DS1857, DS1858, and DS1859. The kit includes Microsoft Windows®-compatible software that performs the 2-wire functions required to change the device settings and monitor the device registers. In addition to the general communications functions provided by the software, it allows the resistors' temperature-addressed look-up tables to be programmed from a text file. The kit hardware includes test points that allow inputs to be connected to the external stimuli and outputs to be monitored by test equipment; jumpers can be used to configure the device for the customer's application.

Applications

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

eval board
schematic 4
DS1857EVKIT

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

Buy Now View Details

Features and Benefits

  • Supports DS1854, DS1857, DS1858, and DS1859
  • Windows Software Allows Easy Access to Device Functionality and Handles 2-Wire Communication
  • ZIF Socket Allows All Four Device Types to be Evaluated from a Single Board
  • Software Allows User to Program Variable Resistors from a Text File
  • Real-Time Monitoring Software Continuously Monitors Temperature, VCC, Monitor Inputs, and Status Bytes
  • External Temperature Sensor Footprint for Evaluating the DS1857
  • EV Kit's Software can be Used to Configure or Monitor the Device in a Customer's Application Circuit

Product Details

The fiber optic monitor and control evaluation kit (EV kit) provides a hardware and software interface for evaluating the DS1854, DS1857, DS1858, and DS1859. The kit includes Microsoft Windows®-compatible software that performs the 2-wire functions required to change the device settings and monitor the device registers. In addition to the general communications functions provided by the software, it allows the resistors' temperature-addressed look-up tables to be programmed from a text file. The kit hardware includes test points that allow inputs to be connected to the external stimuli and outputs to be monitored by test equipment; jumpers can be used to configure the device for the customer's application.

Applications

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

eval board
schematic 5
DS1854EVKIT

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

Buy Now View Details

Features and Benefits

  • Supports DS1854, DS1857, DS1858, and DS1859
  • Windows Software Allows Easy Access to Device Functionality and Handles 2-Wire Communication
  • ZIF Socket Allows All Four Device Types to be Evaluated from a Single Board
  • Software Allows User to Program Variable Resistors from a Text File
  • Real-Time Monitoring Software Continuously Monitors Temperature, VCC, Monitor Inputs, and Status Bytes
  • External Temperature Sensor Footprint for Evaluating the DS1857
  • EV Kit's Software can be Used to Configure or Monitor the Device in a Customer's Application Circuit

Product Details

The fiber optic monitor and control evaluation kit (EV kit) provides a hardware and software interface for evaluating the DS1854, DS1857, DS1858, and DS1859. The kit includes Microsoft Windows®-compatible software that performs the 2-wire functions required to change the device settings and monitor the device registers. In addition to the general communications functions provided by the software, it allows the resistors' temperature-addressed look-up tables to be programmed from a text file. The kit hardware includes test points that allow inputs to be connected to the external stimuli and outputs to be monitored by test equipment; jumpers can be used to configure the device for the customer's application.

Applications

  • Diagnostic Monitoring
  • Instrumentation and Industrial Controls
  • Optical Transceivers
  • Optical Transponders
  • RF Power Amps
DS1859EVKIT
Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS185XEVKIT: Typical Application Circuit
DS185XEVKIT
Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS185XEVKIT: Typical Application Circuit
DS1858EVKIT
Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS185XEVKIT: Typical Application Circuit
DS1857EVKIT
Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS185XEVKIT: Typical Application Circuit
DS1854EVKIT
Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS185XEVKIT: Typical Application Circuit

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