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

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 1012 W

• 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 - 1ms

• 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

BENEFITS

• Low cost, simple functionality

• Wide dynamic signal range

• Very high noise immunity

• Automatic compensation and cancellation

of error sources

• Easy to use to acquire bipolar signals

• Up to 19 bit (18 bit + sign bit) single conversion

or 21 bit (20 bit + sign bit) multiple conversion

and noise performance

• Inherently linear and stable with temperature

and component variations