回到顶部

High-Speed Current Mirror and Integrated FETs for DC-DC Controller

Single-Chip Burst-Mode RSSI Solution Integrates APD Bias, Current Mirror, and DC-DC FETs

产品详情

主要特征

应用/用途

Parametric specs for Fiber Photodiode Current Monitors
Photo Diode Appl. APD
IDIODE (min) 10µA
IDIODE (max) 3.3mA
VBIAS (V) (max) 76
ICC (µA) (typ) 1000
Package/Pins TQFN/24
Oper. Temp. (°C) -40 to +95
Budgetary
Price (See Notes)
2.26
查看更多

简化框图

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心

参量

Parametric specs for Fiber Photodiode Current Monitors
Photo Diode Appl. APD
IDIODE (min) 10µA
IDIODE (max) 3.3mA
VBIAS (V) (max) 76
ICC (µA) (typ) 1000
Package/Pins TQFN/24
Oper. Temp. (°C) -40 to +95
Budgetary
Price (See Notes)
2.26

主要特征

  • Accurate Burst-Mode RSSI Measurement with Two Current Mirror Outputs Improves Dynamic Range
    • -32dBm to -5dBm Optical Input Range
    • ±0.5dB Accuracy
    • Sampling Period as Short as 300ns
    • Pin Discharge Option
  • Low-Noise APD Bias with Shutdown Options Reduces Receiver Sensitivity
    • 15V to 76V APD Bias
    • External Capacitor Connection for Controlled RC Time Constant of APD Voltage Filter
    • Current Clamp with Adjustable Limit and External Shutdown with Limit Status
    • High-Voltage Switch FET for APD Fast Shutdown
  • Supports Additional DC-DC Functions
    • Low-Voltage Synchronous Buck FETs for Efficient DFB Bias
    • Low-Voltage pMOSFET for Generating Negative Bias Voltage for EMLs
  • Small Package Reduces Total Solution Size and Cost
    • 3.5mm x 3.5mm, 24-Pin TQFN Package with Exposed Pad

应用/用途

  • 10G EPON
  • 10GPON OLT
  • Avalanche Photodiode (APD) Monitoring
  • EML Bias
  • GPON OLT

描述

The DS3922 high-speed current mirror integrates high-voltage devices necessary for monitoring the burst mode receive power signal in avalanche photodiode (APD) biasing and OLT applications. The device has two small and one large gain current mirror outputs to monitor the APD current. An adjustable current clamp limits current through the APD. The clamp also features an external shutdown. An integrated FET is also provided that can be used to quickly clamp the high-voltage bias to ground in the case of high optical input power. Integrated low-voltage FET circuits can be used to create buck, boost, and inverting DC-DC converters for efficient laser bias and EML bias applications.

The DS3922 is available in a 24-pin TQFN package and operates over an extended -40°C to +95°C temperature range. 

简化框图

DS3922: Typical Operating Circuit DS3922: Typical Operating Circuit Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心