DS1856B-050+T&R 数字电位计IC

DS1856B-050+T&R

Dual, Temperature-Controlled Resistors with Internally  Calibrated Monitors and Password Protection

数字电位计 IC Dual Temp-Controlled Resistors

General Description

The DS1856B-050+T&R 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-todigital 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.

Features DS1856B-050+T&R

♦ 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 TemperatureControlled 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

Applications DS1856B-050+T&R

Optical Transceivers

Optical Transponders

Instrumentation and Industrial Controls

RF Power Amps

Diagnostic Monitoring