DS1875
ObsoletePON Triplexer and SFP Controller
Industry's Next-Generation PON/SFP Controller with APD Boost Converter for Fiber Optic Modules
- Part Models
- 1
- 1ku List Price
- price unavailable
Part Details
- Meets All PON Burst-Timing Requirements for Burst-Mode Operation
- Laser Bias Controlled by APC Loop and Temperature Lookup Table (LUT)
- Laser Modulation Controlled by Temperature LUT
- Six Total DACs: Four External, Two Internal
- Two 8-Bit DACs, One of Which is Optionally Controlled by MON4 Voltage
- Internal 8-Bit DAC Controlled by a Temperature-Indexed LUT
- PWM Controller
- Boost or Buck Mode
- Boost Mode: Uses Optional External Components, Up to 90V Bias Generation
- 131kHz, 262kHz, 525kHz, or 1050kHz Selectable-Switching Frequency
- APD Overcurrent Protection Using Optional Fast Shutdown
- 10 Analog Monitor Channels: Temperature, VCC, Eight Monitors
- Internal, Factory-Calibrated Temperature Sensor
- RSSI with 29dB Electrical Dynamic
- Five I/O Pins for Additional Control and Monitoring Functions, Four of Which are Either Digital I/O or Analog Monitors
- Comprehensive Fault-Measurement System with Maskable Laser Shutdown Capability
- Two-Level Password Access to Protect Calibration Data
- 120 Bytes of Password-1 Protected Memory
- 128 Bytes of Password-2 Protected Memory in Main Device Address
- 256 Additional Bytes Located at A0h Slave Address
- I²C-Compatible Interface for Calibration and Monitoring
- 2.85V to 3.9V Operating Voltage Range
- -40°C to +95°C Operating Temperature Range
- 38-Pin TQFN (5mm x 7mm) Package
The DS1875 controls and monitors all functions for burst-mode transmitters, APD receivers, and video receivers. It also includes a power-supply controller for APD bias generation, and provides all SFF-8472 diagnostic and monitoring functionality. The combined solution of the DS1875 and the MAX3643 laser driver provides APC loop, modulation current control, and eye safety functionality. Ten ADC channels monitor VCC, temperature (both internal signals), and eight external monitor inputs (MON1–MON8) that can be used to meet transmitter, digital receiver, video receiver, and APD receiver-signal monitoring requirements. Four total DAC outputs are available. A PWM controller with feedback and compensation pins can be used to generate the bias for an APD or as a step-down converter. Five I/O pins allow additional monitoring and configuration.
Applications
- APD Controller
- BPON, GPON, or EPON Optical Triplexers
- SFF, SFP, and SFP+ Transceiver Modules
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Design Note 2
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| DS1875T+ | 38-LFCSP-5X7X0.75 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
|
Jan 17, 2018 - 1722C ASSEMBLY |
||
| DS1875T+ | LAST TIME BUY | |
This is the most up-to-date revision of the Data Sheet.
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