G3001 Differential Amplifier & Excitation Module
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The G3001 is a simple signal conditioner/amplifier with DC Excitation used for
interfacing all bridge type sensors including: Straine Gage, Pressure sensors,
Thermocouples, Accelerometers, Photo Diodes, Piezo sensors etc. The module contains a low-noise instrumentation amplifier, Gain and DC Offset sections and a Low Pass Filter. The bridge excitation is symmetrical and is capable of driving most bridge type transducers. The module has internal bridge completion resistors and a shield driver for protecting the inputs from common mode noises. The unit features a high stability and low noise Excitation unit for driving the sensors. This module can be used as a Strain Gage Amplifier for Load Cells, RTD or Load and Force measurement with Strain gage bridges or other bridge based piezo-resistive transducers (as pressure sensors). It can also be interfaces to most Temperature transducers, Piezo Sensors, Photo sensitive devices and most sensors having a voltage output. It can also be used as a Strain Gage monitoring system with many channels (combining few mainframes together). Due to it's low noise and high gain, it is an ideal solution for a strain gage force balance with op to 6 channels in one mainframe. The amplifier can be operated by batteries and it's output signal can be transferred to the data acquisition system via the AFL-500 Analog Fiber optic Link for complete isolation of the system: AFL-500 Analog Fiber Optic Link |
Specifications
| Gain | 100-2000 Var.Gain |
Dif. Capacitance | 5pF |
Excitation Current (max) | 80mA |
| Gain Non-Linearity | +/-0.002% |
CMMR (DC-100Hz) | 110dB |
Excitation Drift | 15ppm/ºC ±10µV/ºC |
| Gain Temp. Coef. | 5ppm /ºC |
Bandwidth (Gain100-1000) | 20KHz min (-3dB) |
Excitation Noise (DC-100KHz) | 0.6mV@350Ohm Load |
| Input Offset Drift | 1µV/ºC |
Setting time to 0.01% | 80µSec |
Excitation Noise (DC-1KHz) | 0.2mV@350Ohm Load |
| Output Offset Drift | 25µV/ºC |
Input Noise Voltage(@1KHz) | 5nV/ |
Operating Temperature | 0-70ºC |
| Input Offset Vs. Supply |
85dB |
Output Noise |
100nV/ ±12V to ±18V |
Bridge Resistance Range |
50Ohm-20,000Ohm |
| Low Pass Filter |
One fixed Frequency (internally changed) |
Block Diagram
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