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DS1858
Dual Temperature-Controlled Resistors with Three Monitors
Industry's First Integrated Controller-Monitors for SFF/SFP Optical Modules
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Status
Active: In Production.
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.
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Data Sheet
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An evaluation kit is available: DS1854EVKIT, DS1857EVKIT, DS1858EVKIT, DS1859EVKIT, DS185XEVKIT
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
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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 |
| DS1858 |
5-Input Muxable |
12 |
2 Resistors |
50kohms |
256 |
Internal |
EEPROM |
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2-Wire |
Yes |
$2.59 @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
More Information
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Information Index
Rev 1;
2006-05-18
This page last modified: 2007-08-06
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