Analog Devices Inc. ADN2850BCPZ25

Description
The ADN2850 is a dual-channel, nonvolatile memory, digitally controlled resistor with 1024-step resolution. It offers a guaranteed maximum low resistor tolerance error of ±8% and a low temperature coefficient of 35 ppm/°C. The device can operate with a single supply voltage of 2.7 V to 5 V or a dual supply voltage of ±2.5 V.
The ADN2850 has a versatile programming interface that allows for 16 modes of operation and adjustment. These modes include scratchpad programming, memory storing and restoring, increment/decrement, ±6 dB/step log taper adjustment, wiper setting readback, and extra EEMEM for user-defined information.
The ADN2850 is available in a 5 mm x 5 mm 16-lead frame chip scale LFCSP and a thin, 16-lead TSSOP package. It is guaranteed to operate over the extended industrial temperature range of -40°C to 85°C.

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