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.