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.