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See Technical Specifications

DS1865T+ +BOM

Current & Power Monitors & Regulators PON Triplexer Control and Monitoring Circuit

Manufacturer:

Maxim Integrated
Mfr.Part #:

DS1865T+
Datasheet:

DS1865T+ Datasheet (PDF)
Pin Count:

29
Released Date:

Mar 6, 2023
Last Modified Date:

Jul 5, 2023 4:22 PM UTC
EDA/CAD Models:

Request Free CAD Models for DS1865T+

DS1865T+ General Description

The DS1865 controls and monitors all the burst-mode transmitter and video receiver biasing functions for a passive optical network (PON) triplexer. It has an APC loop with tracking-error compensation that provides the reference for the laser driver bias current and a temperature-indexed lookup table (LUT) that controls the modulation current. It continually monitors for high output current, high bias current, and low and high transmit power with its internal fast comparators to ensure that laser shutdown for eye safety requirements are met without adding external components. Six ADC channels monitor VCC, internal temperature, and four external monitor inputs (MON1—MON4) that can be used to meet transmitter and video receive signal monitoring requirements. Two digital-to-analog converter (DAC) outputs are available for biasing the video receiver channel, and five digital I/O pins are present to allow additional monitoring and configuration.

Key Features

Meets GEPON, BPON, and GPON Timing Requirements for Burst-Mode Transmitters
Bias Current Control Provided by APC Loop with Tracking-Error Compensation
Modulation Current is Controlled by a Temperature-Indexed Lookup Table
Laser Power Leveling from -6dB to +0dB
Two 8-Bit Analog Outputs, One is Controlled by MON4 Voltage for Video Amplifier Gain Control
Internal Direct-to-Digital Temperature Sensor
Six Analog Monitor Channels: Temperature, V
CC
Five Digital I/O Pins for Additional Control and Monitoring Functions
Comprehensive Fault Management System with Maskable Laser Shutdown Capability
Two-Level Password Access to Protect Calibration Data
120 Bytes of Password 1 Protected Nonvolatile Memory
128 Bytes of Password 2 Protected Nonvolatile Memory in Main Device Address
128 Bytes of Nonvolatile Memory Located at A0h Slave Address
I2C-Compatible Interface for Calibration and Monitoring
Operating Voltage: 2.85V to 3.9V
Operating Temperature Range: -40°C to +95°C
Packaging: 28-Pin Lead-Free TQFN (5mm x 5mm x 0.8mm)