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DATASHEET

AS89020

4-channel, current input 12 bit analog-to-digital converter (ADC)

SSOP20

Order No.: 305040004

Status: preliminary

FEATURES

▪

Conversion of 4 sensor signals of

photodiodes (e.g. RGB/XYZ color plus one

blank channel for compensation of parasitic

currents or temperature conversion) or other

sensors with current signal output

▪

12 bit signal resolution at an achievable

sensitivity of up to 2.8 pA/LSB

▪

Programmable full-scale range from 11.7 nA

to 12 µA

▪

Sampling rate up to 100 kS/s for all

channels

▪

Measurement of positive and negative

currents

▪

Up to 16 MHz fast SPI-interface

▪

High amplification linearity, no cross talk

▪

High absolute accuracy and reliability

without additional sources

▪

Supply and temperature independent

performance

▪

Supply voltage from 2.7 V to 3.6 V

▪

Temperature range from -25 °C to 85 °C

▪

Deliverable in standard SSOP20 package

APPLICATIONS

▪

Precise conversion of photo current for

optical sensors and arrays (e.g. UV, VIS, IR)

and other sensors with current output

▪

In combination with ams Sensors Germany’s

color sensors or other multi-channel pin-

diodes: measurement of surfaces and

distances

▪

In combination with ams Sensors Germany’s

color sensors: measurement of light –

chromaticity coordinates (XYZ CIE1931,

DIN5033 and similar) or color temperatures

to control and process displays and

backlights (e.g. LED, CCFL)

▪

In combination with ams Sensors Germany’s

color and spectral sensors: measurement of

reflective and/or transmitted light –

chromaticity coordinates (XYZ CIE1931,

DIN5033 and similar) measurement of

objects and surfaces for analyses, quality

management, sorting, etc.

TYPICAL MARKETS

▪

Lighting SSL and photometry

▪

Industrial/commercial lighting

▪

Chemical and biochemical analyses

▪

Industrial process control

▪

Medical and environment instrumentation

▪

Infotainment (backlights and video walls)

and monitors

▪

High quality consumer displays and tablets