DS1858

Dual Temperature-Controlled Resistors with Three Monitors

Industry's First Integrated Controller-Monitors for SFF/SFP Optical Modules


Please check latest availability status for a specific part variant.

Description

The DS1858 dual temperature-controlled nonvolatile (NV) variable resistors with three monitors consists of two 50kΩ 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.
DS1858: Typical Operating Circuit DS1858: Typical Operating Circuit Enlarge+

Key Features

  • Five Total Monitored Channels (Temperature, VCC, MON1, MON2, MON3)
  • Three External Analog Inputs (MON1, MON2, MON3)
  • Internal Direct-to-Digital Temperature Sensor
  • 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
  • 2-Wire Serial Interface
  • Two Buffers with TTL/CMOS-Compatible Inputs and Open-Drain Outputs
  • Operates from a 3.3V or 5V Supply
  • SFF-8472 Compatible

Applications/Uses

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

See parametric specs for Fiber Monitoring and Control (14)


Part NumberADCsResolution
(bits)
DACs/ ResistorsFS Out
(kΩ)
StepsTemp. SensorMemoryVSUPPLY
(V)
Control InterfacePackage/PinsBudgetary
Price
See Notes
DS1858 5-Input Muxable122 Resistors50kohms256InternalEEPROM
3.3
5
2-Wire
CSBGA/16
TSSOP/16
$2.94 @1k

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

DS1854EVKIT: Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS1857EVKIT: Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS1858EVKIT: Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS1859EVKIT: Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
DS185XEVKIT: Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
Product Reliability Reports: DS1858.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Related Resources

Type ID Title
Evaluation Board4798DS1854EVKIT Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
Evaluation Board4798DS1858EVKIT Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
Evaluation Board4798DS1857EVKIT Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
Evaluation Board4798DS185XEVKIT Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit
Evaluation Board4798DS1859EVKIT Evaluation Kit for the DS1854, DS1857, DS1858, and DS1859 Fiber Optic Monitor and Control Evaluation Kit