FEATURES

100kHz SAMPLING RATE 12-BIT ADC

8 ANALOG INPUT CHANNELS

THREE 12-BIT DACS

NINE OPERATIONAL AMPLIFIERS

THERMISTOR CURRENT SOURCE

INTERNAL 2.5V REFERENCE

SPI SERIAL INTERFACE

3V LOGIC COMPATIBLE

SINGLE +5V SUPPLY

LOW POWER: 40mW

TQFP-48 PACKAGE

APPLICATIONS

CW LASER AND PUMP LASER CURRENT

CONTROL IN DWDM

TEC COOLER CURRENT CONTROL IN DWDM

OPTICAL POWER MONITORING

TUNABLE LASER

DESCRIPTION

The AMC7820 is a complete analog monitoring and control

circuit that includes an 8-channel, 12-bit Analog-to-Digital

Converter (ADC), three 12-bit Digital-to-Analog Converters

(DACs), nine operational amplifiers, a thermistor current source,

an internal +2.5V reference, and an SPI™ serial interface.

External reference may be applied. Typical power dissipation

is 40mW. For the ADC, the unbuffered analog input range is

0V to +5.0V, and the buffered analog common-mode input

range is 0V to +3.8V. For the DACs, the analog output range

is 0V to +2.5V or 0V to +5.0V.

The AMC7820 is ideal for multichannel applications where

low power and small size are critical. The AMC7820 is

available in a TQFP-48 package and is fully specified and

tested over the –40°C to +85°C temperature range.

SPI is a trademark of Motorola.