DS1842 Maxim, DS1842 Datasheet
DS1842
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DS1842 Summary of contents
Page 1
... Rev 1; 3/11 76V, APD, Bias Output Stage with General Description The DS1842 integrates the discrete high-voltage com- ponents 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 cur- rent through the APD and also features an external shutdown ...
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... Voltage Range on LX Relative to GND...................-0.3V to +85V Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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A MIRIN vs. MIROUT CURRENT (V = 40V) MIRIN 10,000 1000 100 100 1000 10,000 MIROUT CURRENT (μA) MIR ERROR vs. TEMPERATURE (I = 1μA) MIROUT 2 1 MIR2 0 -1 ...
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... PIN NAME FUNCTION 1 MIR1 Current Mirror Monitor Output, 10:1 Ratio 2 MIR2 Current Mirror Monitor Output, 5:1 Ratio No Connection. Can be connected to 3 N.C. GND for compatibility with the DS1842A Connection. Not internally N.C. 9–12 connected. Clamp Input. Disables the current mirror 5 CLAMP output (MIROUT). 6 GATE ...
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... The internal FET is used in conjunction with a DC-DC boost controller to precisely create the APD bias voltage. The DS1842 has two current mirror outputs. One is a 10:1 mirror connected at MIR1, and the other is a 5:1 mirror connected to MIR2. The mirror output is typically connected to an ADC using a resistor to convert the mirrored current into a voltage ...
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... APD, Bias Output Stage with Current Monitoring Pin Configuration TOP VIEW 1 MIR1 2 MIR2 3 N.C. DS1842 4 N.C. 5 CLAMP GATE 6 *EP GND 7 TDFN *EXPOSED PAD. 6 _______________________________________________________________________________________ For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. ...
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... Characteristics section; changed pin 3 from GND to N.C. in the Pin Description and Pin Configuration Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...