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DS1856B-M50+R Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1856B-M50+R Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 28 page Dual, Temperature-Controlled Resistors with Calibrated Monitors and Password Protection 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. General Description The DS1856M 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-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. The DS1856M includes 128 bytes of EEPROM memory at A2h slave address, Table 00/01. The DS1856M also includes three-levels of password protection. The DS1856-01 includes 256 bytes of A0h EEPROM memo- ry. The DS1856B-M50+ and DS1856E-M50+ are drop- in replacements for the DS1856B-050+ and DS1866E-050+, respectively. The enhancements include 256 bytes of EEPROM at A0h; selectable MON2, MON3 references; and a 13-bit ADC. These are backward compatible by default with the DS1856B-050+/DS1856E-050+. Applications Optical Transceivers Optical Transponders Instrumentation and Industrial Controls RF Power Amps Diagnostic Monitoring Features ♦ SFF-8472 Compatible ♦ 13-Bit ADC ♦ Two Linear, 256-Position, Nonvolatile Temperature-Controlled Variable Resistors with 2°C Resolution ♦ 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 19-6395; Rev 0; 7/12 EVALUATION KIT AVAILABLE SDA 1 2 3 4 5 6 7 8 16 0.1 μF 15 14 13 12 11 10 9 SCL OUT1 IN1 OUT2 IN2 N.C. GND VCC H1 L1 H0 L0 MON3 MON2 MON1 Rx POWER* DIAGNOSTIC INPUTS TO LASER MODULATION CONTROL TO LASER BIAS CONTROL DECOUPLING CAPACITOR Tx POWER* Tx BIAS* *SATISFIES SFF-8472 COMPATIBILITY VCC VCC = 3.3V 4.7k Ω 4.7k Ω Tx-FAULT LOS 2-WIRE INTERFACE DS1856M Typical Operating Circuit Ordering Information appears at end of data sheet. |
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Similar Description - DS1856B-M50+R |
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