JSD OI-MS series Analog mV isolation amplifier applications
2012-6-3 22:58:42 Clicks:4491
JSD OI-MS series Analog mV isolation amplifier applications
General Description:
Shenzhen Jie Shengda Technology JSD OI-MS series mV isolation amplifier is a hybrid integrated circuits witch make the mV analog signal proportionally converted into a standard isolation voltage signal,The chip integrates a set of multi-channel high-isolation DC-DC micro Converter and several high-performance signal isolation converter for 0-10mV/0-20mV/0-30mV/0-45mV/0-50mV/0-60mV/0-75mV/0-100mV such small signal amplification and conversion. In addition to the chip isolated power supply for the internal amplifier circuit, you can also outward (signal input/output terminal) provides two isolated DC power supply and two reference voltage source, for extended use of an external circuit, such as a bridge circuit , the reference circuit, and sensors to provide power. SMD technology design and new isolation technologies make the chip achieve three-port isolation(input, output and power supply),and the isolation voltage between them is up to 2500 VDC, and can meet the industrial temperature range, Operation in the wet and shaking harsh environments.
JSD OI-MS series isolation amplifier is easy to use, simply access external few components, you can achieve a small analog signal isolation and transmission, it's your ideal choice for designing .The series isolation amplifier using a standard DIP24 pin package and GB standards DIN35mm rail mounting. The former can be soldered directly to a variety of instrumentation and circuits inside, saving development costs, development cycle and improve the design space; latter is to install the control room and the control cabinet, users Wiring install to use without adjustment, saving time.
JSD OI-MS series isolation amplifier adopting imported chip design, optical isolation, have stronger anti-EMC electromagnetic interference characteristics.
Features:
◆ 0-10mV/0-20mV/0-30mV/0-40mV/0-50mV/0-60mV/0-75mV/0-100mV/0-150mV/0-200mV small signal isolation amplifier
◆ Accuracy class: 0.1 0.2
◆ full scale high linearity (non-linearity <0.1%)
◆ three-port isolation 2500VDCbetween power supply, signal input and signal output
◆ Power supply: 5VDC/12VDC/15VDC/24VDC single power supply can be
◆ provide two groups isolated power supply to user: 5VDC ~ 24VDC
◆ Provide reference voltage source:inputs 1.25VDC, output isolation 5VDC, accuracy 2%
◆ Ultra-small size, saving PCB board space
◆ Standard DIP 24PIN packages that meet UL94-V0 flame retardant standard
◆ Industrial temperature range: -45 ~ +85 ℃
Typical applications:
◆ Analog mV-level signal data isolation, acquisition and conversion
◆ industrial field signal isolation, transformation and monitoring
◆ PLC & FA motor control signal isolation
◆ ground interference suppression
◆ instrumentation and sensor signal transceiver and transform
◆ long-distance signal transmission without distortion
◆ power equipment monitoring, medical electronic equipment, safety isolating
Detailed data:
Simplified schematic：
mV isolation amplifier applications:
Small signal isolation amplifier application diagram:
1、when input 4-20mA , JSD OI-MS series isolation amplifier typical wiring diagram (Figure 2)
Figure 2 current input typical Wiring
2、when input mV-level voltage signal, JSD OI-MS series isolation amplifier typical wiring diagram (Figure 3)
Figure 3 mV-level voltage input typical wiring
3、mV-level isolation amplifier application examples
Application Example 1: (Figure 4)
Analog Isolation Amplifier measure small signal Vin: 0~30mVDC DC voltage signal; Vout: 1~5V DC isolated signal. Take W1=100K (multi-turn potentiometer), W2=50K (multi-turn potentiometer),when input 0mV, adjust W2 make the output voltage signal corresponding to 1V, when 30mV input, adjust W1 make the output voltage signal corresponding to 5V. Repeat adjustment can increase the output voltage accuracy, this method repeated 2 or 3 times to ahieve.
Figure 4 analog isolation amplifier measure small signal
Application Example 2 : (Figure 5)
Isolation Amplifier measure analog high voltage signal
Vin: 0~100VDC DC voltage signal ; Vout: 0~5VDC isolated signal . add resistor divider at the input port, taking R1=100K, R2=1K, W1=100K(multi-turn potentiometer), W2=20K (multi-turn potentiometer) when input 0V , adjust the output voltage signal corresponding to W2 0V, input 100V , adjust the output voltage signal corresponding to W1 5V. So repeatedly adjust the output voltage signal accuracy can be improved , this method repeatedly adjust 2~3 times.
Figure 5 isolation amplifier measuring high voltage analog signal
Application Example 3 : (Figure 6)
Isolation Amplifier amplification and conversion small signal isolation
Vin: 0~50mVDC DC voltage signal ; Iout :4-20mA isolated signal . Take W1=100K (multi-turn potentiometer), W2=50K ( multi-turn potentiometer ), R1=1K, R2=1K, R3=250Ω. Input is 0V , adjust the W2 (Vout at) output voltage signal corresponding to 1V, input 50mV , adjust the W1 (Vout at) output voltage signal corresponding to 5V. So repeatedly adjust the output current signal accuracy can be improved , this method repeatedly adjust 2~3 times. Accordingly, between Io+ and Io-will produce a standard 4-20mA current signal.
Figure 6 isolation amplifier achieve small signal isolation amplifier and transformation
Data details :
Note:
Debugging mV level isolation amplifier,multi-function high accuracy multimeter moniting the output of , usemultimeter (multi-function multimeter displays above thre- half ) is better so that the corrected isolator output accuracy is higher and more precise.
Dimensions and Layout diagram:
