Utilised inside Linear-Pluggable Optics (LPO), Co-Packaged Optics (CPO), and Near-Packaged Optics (NPO), the external laser source (ELS) is suitable for next-generation optical modules.
Because the ELS is required to deliver an extremely clean continuous-wave optical output power while minimizing power consumption, a high-PSRR, low-dropout IDAC is critical.
PhotonIC Tech PHPM1108 Key measured Performance Data
In conventional architectures, reducing the dropout voltage (Vdrop) results in significantly degraded PSRR. This is precisely why many systems are forced to allocate greater voltage headroom — at the expense of higher power consumption and more complex thermal management.
The PHPM1108 integrates an 8-channel IDAC with independent control, enabling designers to configure one, two, four, or eight-channel combinations to support different drive current requirements for various CW-laser implementations.
• PHPM1108 – Key Capabilities:
• Input Voltage Range: 0.8 V ~ 2.2 V
• Integrated 8-channel IDAC (flexible combination):
• Max Output Capability: 0.5A (per Channel) or 4A (8 Channels Combined)
• High-accuracy 12-bit Programmable Constant Current Output
• 11-bit SAR ADC for laser voltage and temperature monitor
• Supports Max 1MHz I2C CLK
• Full Protection with On-Chip Fault Detection (Bypassable Functionality):
• Over-Voltage Protection
• Laser Short/Open Protection
• Thermal Shutdown
• 2.73 mm * 2.73 mm * 0.5 mm BGA package.
