Miniature Charge Amplifier for Piezoelectric Transducers

The Series 5820 Charge Amplifiers from Columbia are specifically developed for use with virtually all piezoelectric transducers to develop several airborne vibration and shock data acquisition systems. Very small package size and extremely low power consumption are the features of these devices.

Series 5820 Charge Amplifiers offer dual signal outputs, one is biased about +2.50 VDC and one unbiased capacitance and the other one is unbiased capacitance coupled. They come in seven standard charge conversion ranges. Each range provides a 10:1 tandem gain adjustment capacity. It comes with a range of seven low-pass filters to fulfill the separate vibration measurement requirements of the users.

Note: Exports from the United States are subject to the licensing requirements of the Export Administration Regulations (EAR) and/or the International Traffic in Arms Regulations (ITAR).

  • Biased or unbiased signal outputs
  • Ultra-miniature electronic package
  • 10:1, 20-Turn gain adjustment potentiometer
  • Choice or Butterworth low-pass filter

Miniature Charge Amplifier for Piezoelectric Transducers

Image Credit: Columbia Research Laboratories

Specification

Table 1. Source: Columbia Research Laboratories

Electrical 5820
Input Source Resistance 25 MΩ Min
Input Source Capacitance 10000 pF Max. to meet all specifications
Overload Recovery 5000 pcmb 1 mS Half-Sine, No Effect
Input Connection Single Ended, Referenced to Circuit Board
Output Impedance Biased: 100 Ω Max., Direct Coupled
Unbiased: 100 Ω Maximum, 22 uF Coupling Capacitor, 20 K Internal Load
Output DC Bias +2.500 +0.075 VDC @ Biased Output
0.000+0.050/-0.000 VDC @ Unbiased Output
Output Limiting Biased Output: +5.40 +0.20 VDC, 0 +0.05 VDC
DC Power Input +12 to +32 VDC, +28 VDC Nominal
Supply Current 25 mA Max.
Minimum Linear Output Voltage 4.65V Pk/Pk (1.64 VRMS)
Maximum Linear Output Current 0.500 mA Pk/Pk
Frequency Response +5%, 5 Hz to 10 kHz Available (Refer to Filter Chart)
Residual Noise 5.0 mV RMS Max
Amplitude Linearity 1% Max.B.F.S.L.
Gain Stability Temperature:+2% Max over Operating Temperature
Input Capacity: <0.10%/1000pF
Total Harmonic Distortion 1% Max.
Warm-up Time 30 Seconds Max.
Case Ground Isolation Circuitry Isolated by 50 MΩ Min. @ 50 VDC

 

Environmental 5820
Temperature, Operating -55 to +85 °C
Temperature, Storage -55 to +125 °C
Vibration 20 G PK from 50 Hz to 2 kHz
Shock 100 G PK with 6.5 mS Sawtooth pulse
Humidity Hermetic Grade Epoxy Seal
Altitude 200,000 Ft Max.

 

Physical 5820
Weight 50 gms Max.
Size 1.575" L x 1.00" W x 1.00" H
(4 cm L x 2.5 cm W x 2.5 cm H)
Case Material Aluminum
Electrical Interface Output: Viking VR5-4AG15, 5-Pin Cylindrical
Input: Double Insulated #10-32 Coaxial
Case Mounting (3) #6 Thru Holes for #6-32 Socket Head Cap Screw

 

Standard Gain Ranges

Table 2. Source: Columbia Research Laboratories

SUFFIX CONVERSION GAIN RANGE
P1 0.2 TO 2.0 mV/pcmb
P2 0.5 TO 5.0 mV/pcmb
P3 1.0 TO 10.0 mV/pcmb
P4 2.0 TO 20.0 mV/pcmb
P5 5.0 TO 50.0 mV/pcmb
P6 10.0 TO 100.0 mV/pcmb

 

Low-pass Filters

Table 3. Source: Columbia Research Laboratories

SUFFIX ±5% RESPONSE ROLLOFF
Fl 5 Hz TO 10 0Hz -12 dB/OCT
F2 5 Hz TO 200 Hz -12 dB/OCT
F3 5 Hz TO 500 Hz -12 dB/OCT
F4 5 Hz TO 1000 Hz -12 dB/OCT
F5 5 Hz TO 2000 Hz -12 dB/OCT
F6 5 Hz TO 5000 Hz -12 dB/OCT
F7 5 Hz TO 10000 Hz -12 dB/OCT

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