Advanced Linear Devices Inc. ALD500RAU-20SEL

Description
The ALD500RAU/ALD500RA/ALD500R is a precision integrating analog processor with a precision voltage reference. It offers high accuracy DC measurement functions and is suitable for applications such as precision sensor interfaces, portable battery-operated instruments, computer peripherals, and PCMCIA devices.

Features
Resolution up to 18 bits plus sign bit and over-range bit
Accuracy independent of input source impedances
Accurate on-chip voltage reference
Tempco as low as 10 ppm/°C guaranteed
Chip select power down mode
High input impedance of 10^12Ω
Inherently filters and integrates any external noise spikes
Differential analog input
Wide bipolar analog input voltage range ±3.5V
Automatic zero offset compensation
Low linearity error as low as 0.001% typical
Fast zero-crossing comparator
Low power dissipation - 6mW typical
Automatic internal polarity detection
Low input current - 2pA typical
Optional digital control from a microcontroller, an ASIC, or a dedicated digital circuit
Flexible conversion speed vs. resolution trade-off

Applications
4 1/2 digits to 5 1/2 digits plus sign measurements
Precision analog signal processor
Precision sensor interface
High accuracy DC measurement functions
Portable battery operated instruments
Computer peripheral
PCMCIA