1 Features
• Four 12-bit current output DACs (IDACs)
– 150-mA full-scale output range
• 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
• Twelve channel, 12-bit, 1-MSPS SAR ADC
– Four external inputs: 2.5-V and 5-V input
ranges
– Four IDAC voltage monitor channels
– Four VDAC current monitor channels
– Programmable sequencer
– Programmable out-of-range alarms
• Internal 2.5-V reference
• Suppy and temperature fault alarms
• SPI and I2C interfaces: 1.7-V to 3.6-V operation
– SPI: 4-wire interface
– I2C: Four slave addresses
• Specified temperature range: –40°C to +125°C

2 Applications
• Optical module
• Intra-dc interconnect (metro)

3 Description
The AMC60804 is a highly integrated, low-power
analog monitor and controller optimized for electroabsorption
modulated lasers (EML).
The AMC60804 includes four 12-bit current output
digital-to-analog converters (IDACs) and four 12-bit
voltage output DACs (VDACs) with programmable
output ranges. The AMC60804 also includes a 12-bit,
1-MSPS analog-to-digital converter (ADC) used for
external signal and internal signal monitoring, supply
and temperature alarm monitors, and a high-precision
internal reference.
The AMC60804 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 the electro-absorption
modulator (EAM) in an EML. Additionally, the
AMC60804 IDACs support a full-scale output range of
150 mA with very low power dissipation, thus
eliminating the need for external components to bias
the EML laser diode. In combination the AMC60804
four VDACs and four IDACs enable accurate biasing
of up to four EML lasers.
The AMC60804 includes four input pins that are
multiplexed to the ADC and incorporate a low-latency
window comparator, making 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 monitoring of these outputs.
The AMC60804 low power, high integration, very
small size, and wide operating temperature range
make the device an excellent choice as an all-in-one,
low-cost control circuit for the EML lasers found in
optical modules. Contact TI sales for the full data
sheet.