TI AMC60704YBHR

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.

• 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

• Optical module
• Intra-DC interconnect (metro)