1 Features

• Four 12-bit current output DACs (IDACs)

– 200mA full-scale output range

– Low supply headroom: 300mV at 200mA

• Four 12-bit voltage output DACs (VDACs)

– Selectable full-scale output ranges:

–5V, –2.5V, +2.5V and +5V

– High-current drive capability: ±50mA

• Multichannel, 12-bit, 1MSPS SAR ADC

– Four external inputs: 2.5V and 5V ranges

– Four IDAC voltage monitor channels

– Four VDAC current monitor channels

– Programmable sequencer

– Programmable out-of-range alarms

• Internal 2.5V reference

• Supply and temperature fault alarms

• SPI and I2C interfaces: 1.7V to 3.6V 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 AMC6V704 is a highly integrated, low-power

analog monitor and controller for optical-transceiver

applications.

The AMC6V704 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,

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

external and internal signal monitoring, supply and

temperature alarm monitors, and a high-precision

internal reference.

The AMC6V704 VDACs support both positive and

negative output-range operation and are capable

or sourcing and sinking up to 50mA, making them

an excellent choice for biasing optical modulators.

Additionally, the AMC6V704 IDACs support a fullscale

output range of 200mA with very-low power

dissipation. The IDACs eliminate the need for external

components to bias laser diodes. In combination,

the AMC6V704 four VDACs and four IDACs enable

accurate biasing of electro-absorption modulated

lasers.

The AMC6V704 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 sourced or

sunk by the VDACs, thus enabling these outputs to be

monitored.

The AMC6V704 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.