The DS1842 integrates the discrete high-voltage components necessary for avalanche photodiode (APD) bias and monitor applications. A switch FET is used in
conjunction with an external DC-DC controller to create a boost DC-DC converter. A current clamp limits current through the APD and also features an external
shutdown. The device also includes a dual current mirror to monitor the APD current.
Key Features
Applications/Uses
76V Maximum Boost Voltage
Switch FET
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
Multiple External Filtering Options
3mm x 3mm, 14-Pin TDFN Package with Exposed Pad
APD Biasing
GPON Optical Network Unit and Optical Line Transmission
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-1 of 1
DS1842
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Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS1842N+T&R
Active
TDFN-EP;14 pin;9.6 mm²
Outline Drawing: 21-0137 (PDF)
Land Pattern: 90-0063 (PDF)
Use pkgcode/variation: T1433+2*
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