DS1842A Maxim, DS1842A Datasheet
DS1842A
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DS1842A Summary of contents
Page 1
... Rev 1; 9/11 76V, APD, Dual Output Current Monitor General Description The DS1842A integrates the discrete high-voltage components necessary for avalanche photodiode (APD) bias and monitor applications. A precision volt- age-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 shut- down ...
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... Voltage Range on FBOUT Relative to GND ..........-0.3V to +6.0V 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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APD, Dual Output Current Monitor (T = +25°C, unless otherwise noted.) A MIRIN CURRENT vs. MIROUT CURRENT (V MIRIN 10,000 1000 100 100 MIROUT CURRENT (µA) MIRIN CURRENT vs. TEMPERATURE (V = 40V, I MIRIN 5 ...
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APD, Dual Output Current Monitor (T = +25°C, unless otherwise noted.) A MIR ERROR vs. MIRIN VOLTAGE 1µA MIR2 1mA MIR1 - MIRIN VOLTAGE (V) RESISTOR-DIVIDER ...
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... APD current can also be shut down by CLAMP or ther- mal shutdown. The resistor-divider is used in conjunc- tion with a DC-DC boost controller and FET to precisely create the APD bias voltage. The DS1842A 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. Block Diagram ...
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... T . These currents resume after the device has SHDN CLAMP cooled. The DS1842A includes a resistor-divider to use as the feedback network for the boost converter. The DS1842A resistor-divider ratio, K controlled, allowing the boost converter output to be set with very high precision. K internal DC-DC boost controller. K modified by adding external series/parallel resistors ...
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... Package Thermal Characteristics section; removed the FET Typical Operating Characteristics graphs 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. ...