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

ADN2850BCPZ250-RL7属于集成电路（IC） > 数字电位计。亚德诺半导体技术有限公司制造生产的ADN2850BCPZ250-RL7数字电位计数字电位器是一系列集成电路器件，可提供类似于传统机械电位器或变阻器的可调节电阻，但通过电子信号而非机械输入来进行控制。虽然这些器件的电阻可耗散的电能相对有限，但其电子控制能力有助于小型化、自动化和远程控制信号级模拟电路，而这些电路本来可能会使用机械电位器。