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Home > Products > Spectrograph & Monochromator > Detectors > Preamplifier

ZAMP

Preamplifier

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Details

Preamplifier

ZOLIX offers a variety of low noise, high gain amplifier to working with the single channel detectors. The amplifier is mainly used to convert detector output signals, and amplify the signals. Then the signals are inputted to other measurement equipments, such as Data Acquire System, oscilloscopes, DMM, to achieve weak signal measurement.

■ ZAMPTranc-impedance Amplifier

◆ZAMP is suitable for high impedance detectors.

◆Power supply mode: ZPS-24

Specifications

Model	ZAMP
Gain range (V/A)	10³～10⁸
Noise voltage (mV rms)	0.5
Output voltage range (V)	±5
Current Range (A)	10^-2～10^-9
Input impedance (Ohm)	0.001
Output impedance (Ohm)	＜1
Gain ( @ bandwidth)	10³@ 160KHz 10⁴@ 45KHz 10⁵@ 12KHz 10⁶@ 12KHz 10⁷@ 550Hz 10⁸@ 550Hz
Ideal for detectors	DSi/ DInGaAs/ DInSb-De

■Current mode amplifier, ZPA-7，ZPA-5.

◆ZPA-7 for most high shunt resistance (RD > 25KΩ) detectors.

◆ZPA-5 for low impedance (RD<400Ω) detectors.

◆Power supply mode: ZPS-PN12

Specifications

Model	ZPA-7	ZPA-5
Gain range (V/A)	10⁵~10⁷	10³~10⁵
Noise voltage (μV, p-p)	1.5	0.035
Output voltage range (V)	±10	±10
Input Bias Current (nA)	±0.001	±30
Output impedance (Ohm)	＜100	＜100
Gain bandwidth	10⁵ @ 150KHz 10⁶ @ 60KHz 10⁷ @ 8KHz	10³ @ 200KHz 10⁴ @ 200KHz 10⁵ @ 200KHz
Ideal for detectors	DSi/ DInGaAs/ DInSb-De	DInAs

■ Voltage Amplifier, Model ZPA-101，ZPA-300

Specifications

Model	ZPA-101	ZPA-300	ZPA-8300
Gain range (V/A)	100，1000	10，300，1000	12-300
Noise voltage (μV, p-p)	1.5	1.5	1.5
Output voltage range (V)	10	10	10
Input impedance (Ohm)	10	100	50
Gain bandwidth	10-10⁶	DC-10⁶	10⁴
Ideal for detectors	DMCT-De/DInAs	DMCT-De	DMCT-De

■ Application Note.

Current Mode Preamplifiers

The transimpedance (or current-mode preamplifier circuit of Fig. 1 is recommended for most PV detector applications, for frequencies up to 1 MHz. It offers lowest noise and best linearity

under a wide range of conditions. The characteristics of the op-amp circuit maintain the diode near 0V bias. All the photocurrent from the detector essentially flows through the feedback resistor RF.

The feedback capacitance CF is added to control gain peaking (Fig. 2). The value of CF depends on the detector capacitance. It is installed at the factory to provide stable preamplifier performance with a particular detector model.

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