1 Features

• Four 12-bit current output DACs (IDACs)

– 200-mA full-scale output range

– Low supply headroom: 300 mV at 200 mA

• Four 12-bit voltage output DACs (VDACs)

– Selectable full-scale output ranges:

–5 V, –2.5 V, +2.5 V and +5 V

– High-current drive capability: ±50 mA

• Multichannel, 12-bit, 1-MSPS SAR ADC

– Four external inputs: 2.5-V and 5-V ranges

– Four IDAC voltage monitor channels

– Four VDAC current monitor channels

– Programmable sequencer

– Programmable out-of-range alarms

• Internal 2.5-V reference

• Supply and temperature fault alarms

• SPI and I2C interfaces: 1.7-V to 3.6-V operation

– SPI: 4-wire interface

– I2C: Four target addresses

• Specified temperature range: –40°C to +125°C

2 Applications

• Optical module

• Intra-DC interconnect (metro)

3 Description

The AMC60704 is a highly integrated, low-power

analog monitor and controller optimized for electroabsorption

modulated laser (EML) applications.

The AMC60704 includes four 12-bit current output

digital-to-analog converters (IDACs) and four 12-bit

voltage output DACs (VDACs) with programmable

output ranges. The device also includes a 12-bit,

1-MSPS analog-to-digital converter (ADC) used for

external and internal signal monitoring, supply and

temperature alarm monitors, and a high-precision

internal reference.

The AMC60704 VDACs support both positive and

negative output-range operation and are capable or

sourcing and sinking up to 50 mA, making them

an excellent choice for biasing optical modulators.

Additionally, the AMC60704 IDACs support a fullscale

output range of 200 mA with very-low power

dissipation. The IDACs eliminate the need for external

components to bias laser diodes. In combination,

the AMC60704 four VDACs and four IDACs enable

accurate biasing of up to four EMLs.

The AMC60704 also includes four input pins that

are multiplexed to the ADC and incorporate a lowlatency

window comparator. These features make this

device an excellent choice for received signal strength

indicator (RSSI) and loss-of-signal (LOS) detection.

The ADC is also capable of measuring the voltage at

the IDAC pins, as well as the current being sourced or

sinked by the VDACs, thus enabling these outputs to

be monitored.

The AMC60704 low power, high integration, very

small size, and wide operating temperature range

make this device an excellent choice as an all-in-one

control circuit for optical modules.