J12 SERIES INAS DETECTORS Operating Instructions
■The recommended operating circuit for most applications is an operational amplifier in a negative- feedback transimpedance configuration. The feedback circuit converts the detector output current to a voltage, while the op-amp maintains the detector near zero-volt bias for lowest noise. (Figure 1.0). Because RD varies significantly with temperature, selection of the proper op-amp will depend on the detector operating temperature as well as the desired bandwidth. The feedback resistor RF should be at least 10x greater than RD for best signal-to-noise ratio. Teledyne Judson has preamplifiers for optimum performance with each detector type. For high frequency applications, the detector may be reverse biased and terminated into a low impedance load. Maximum reverse bias is 1 volt. (See Figure 3.0).
■Frequency Response: The feedback resistance RF , combined with the detector capacitance and dynamic impedance, determines the frequency response of the system. Capacitance and impedance values are provided on the data sheet supplied with each detector.
■Recommended Preamplifiers: The PA5, PA6 and PA7 have adjustable gain and low noise. Preamplifiers should be picked by the detector shunt impedance at the optimal operating temperature for a particular application (Table 1). The PA9 should be used where high frequency response and low noise are required. The PA9 may not be suitable for DC applications due to its high input offset voltage.
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J12 SERIES 、 J12 、 J12-18C-R250U 、 J12-18C-R01M 、 J12-5AP-R02M 、 J12TE1-37S-R250U 、 J12TE1-37S-R01M 、 J12TE1-37S-R02M 、 J12TE2-66D-R250U 、 J12TE2-66D-R01M 、 J12TE2-66D-R02M 、 J12TE3-66D-R250U 、 J12TE3-66D-R01M 、 J12TE3-66D-R1.5M 、 J12TE3-66D-R02M 、 J12TE4-3CN-R250U 、 J12TE4-3CN-R01M 、 J12TE4-3CN-R02M-B 、 420002 、 420003 、 420011 、 420088 、 420061 、 420065 、 420083 、 420041 、 420089 、 420081 、 420056 、 420063 、 420098 、 420093 |
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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October 2000 |
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PB 220 |
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5.3 MB |
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