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
|
|
|
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■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
|
|
|
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■ 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
|
|
|
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■ 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.
