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DS1842A
76V, APD, Dual Output Current Monitor
APD Bias Output Stage and Fast Current Monitor on a Single Chip
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Status
Active: In Production.
Description
The DS1842A integrates the discrete high-voltage components necessary for avalanche photodiode (APD) bias and monitor applications. A precision voltage-divider network is used in conjunction with an external DC-DC controller and FET to create a boost DC-DC converter. A current clamp limits current through the APD and also features an external shutdown. The precision voltage-divider network is provided for precise control of the APD bias voltage. The device also includes a dual current mirror to monitor the APD current.
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Data Sheet
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Key Features
- 76V Maximum Boost Voltage
- Current Monitor with a Wide 1µA to 2mA Range, Fast 50ns Time Constant, and 10:1 and 5:1 Ratio
- 2mA Current Clamp with External Shutdown
- Precision Voltage Feedback
- Multiple External Filtering Options
- 3mm x 3mm, 14-Pin TDFN Package with Exposed Pad
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Applications/Uses
- APD Biasing
- GPON ONU and OLT
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Key Specifications:
| Fiber Photodiode Current Monitors |
| Part Number |
Photo Diode Appl. |
IDIODE |
IDIODE |
VBIAS
(V) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Oper. Temp.
(°C) |
Budgetary Price |
| min |
max |
max |
max w/pins |
See Notes |
| DS1842A |
APD |
10µA |
3.85mA |
76 |
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9.6 |
-40 to +85 |
$0.90 @1k |
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See All Fiber Photodiode Current Monitors (7)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Application Circuit
More Information
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Information Index
Document Ref.: 19-4994
Rev 1;
2011-09-30
This page last modified: 2011-09-30
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