AMC87208YBFR中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

1 Features

? Six 16-bit current output DACs (IDACs)

– Programmable full-scale output ranges: 250mA,

150mA, 75mA

– IDAC1 current sink option: –60mA

? Two 16-bit current output DACs optimized for high

current generation (IDAC+)

– IDAC internal mode with programmable fullscale

ranges: 250mA, 150mA, 75mA

– IDAC+ mode with external FET option for high

current generation.

? 12-bit, 1MSPS SAR ADC

– IDAC voltage and current monitoring

– IDAC+ voltage and current monitoring

– Six external inputs

– Flexible sequencing

? Internal 2.5V reference: 25ppm/°C

? Temperature fault alarms

? Selectable SPI and I2C interfaces: 1.1V to 1.95V

operation

? Specified junction temperature: –40°C to +125°C

2 Applications

? Optical module

3 Description

The AMC87208 is a highly integrated currentoutput

controller optimized for optical networking

applications.

The AMC87208 includes six dedicated 16-bit currentoutput

digital-to-analog converters (IDACs), and two

16?bit IDACs that can be configured to control

high-output current generation circuits (IDAC+). The

AMC87208 also includes a 12?bit, 1MSPS analogto-

digital converter (ADC). This ADC is used for

internal and external signal monitoring, and as

a temperature alarm monitor. An integrated highprecision

internal reference eliminates the need for an

external reference in most applications.

The IDAC outputs support full-scale output ranges

of 250mA, 150mA, and 75mA, as well as an output

range of –60mA (sink mode) supported on IDAC1

only. The IDAC+ outputs in internal current-output

mode also support full-scale output ranges of 250mA,

150mA, and 75mA. Additionally, the IDAC+ outputs

can be configured to operate with an external FET

and sense resistor to simplify the design of very highcurrent

outputs.

The IDAC and IDAC+ outputs operate from

independent power supplies with a 275mV minimum

headroom for power-dissipation optimization.