GENERAL DESCRIPTION

The ADN2850 is a dual-channel, nonvolatile memory1, digitally controlled resistors2 with 1024-step resolution, offering guaranteed maximum low resistor tolerance error of ±8. The device performs the same electronic adjustment function as a mechanical rheostat with enhanced resolution, solid state reliability, and superior low temperature coefficient performance. The versatile programming of the ADN2850 via an SPI®-compatible serial interface allows 16 modes of operation and adjustment including scratchpad programming, memory storing and restoring, increment/decrement, ±6 dB/step log taper adjustment, wiper setting readback, and extra EEMEM1 for user-defined information such as memory data for other components, look-up table, or system identification information.

FEATURES

Dual-channel, 1024-position resolution

25 kΩ, 250 kΩ nominal resistance

Maximum ±8 nominal resistor tolerance error

Low temperature coefficient: 35 ppm/°C

2.7 V to 5 V single supply or ±2.5 V dual supply

Current monitoring configurable function

SPI-compatible serial interface

Nonvolatile memory stores wiper settings

Power-on refreshed with EEMEM settings

Permanent memory write protection

Resistance tolerance stored in EEMEM

26 bytes extra nonvolatile memory for user-defined

information

1M programming cycles

100-year typical data retention

APPLICATIONS

SONET, SDH, ATM, Gigabit Ethernet, DWDM laser diode

driver, optical supervisory systems

Mechanical rheostat replacement

Instrumentation gain adjustment

Programmable filters, delays, time constants

Sensor calibration

EVAL-ADN2850SDZ属于开发板，套件，编程器 > 评估和演示板及套件。亚德诺半导体技术有限公司制造生产的EVAL-ADN2850SDZ评估和演示板及套件该系列产品提供了一种方便的方法，在经过验证的实施环境中评估某些重点器件的性能或特性。评估方法通常有完善的文档说明，并且视乎具体情况由评估软件提供支持。产品通常由印刷电路板组成，板上已装有重点器件以及必要或有用的支持元器件，另外也可能包括其他组件，例如电缆或电源。对于数量特别多或类别独特的器件类别(如 ADC、DAC 和开关模式电源)，评估平台可组合为一个单独的产品系列。