Features and Benefits
- 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
- Small Package Reduces Total Solution Size and Cost
- 3.5mm x 3.5mm, 24-Pin TQFN Package with Exposed Pad
The DS3923 high-speed current mirror integrates high-voltage devices necessary for monitoring the burst-mode receive power signal in avalanche photodiode (APD) biasing and optical line terminal (OLT) applications. It provides small and large gain current mirror outputs to monitor the APD current. A sample/hold circuit with automatic gain selection captures the sampled signal so that an external ADC can accurately measure the signal. An adjustable current clamp limits current through the APD. The clamp also features an external shutdown. An integrated FET is also provided which can be used to quickly clamp the high-voltage bias to ground in the case of high optical input power.
The DS3923 is available in a 24-pin TQFN package and operates over an extended temperature range of -40°C to +95°C.
- 10GPON OLT
- APD Monitoring
- GPON OLT
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Documentation & Resources
DS3923 Reliability Data1/12/2023
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.
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.