SBOA097B June   2004  – May 2015 INA132 , INA146 , INA152 , OPA2205 , OPA2277 , OPA277 , OPA301 , OPA335 , OPA364 , OPA4205 , OPA725 , TLV2341

 

  1.   High-Voltage Signal Conditioning for Low-Voltage ADCs
    1.     Trademarks
    2. 1 Introduction
    3. 2 Circuit 1: The Modular Approach
    4. 3 Circuit 2: Single-Supply/Single-Port Approach
    5. 4 Circuit 3: Difference Amp Approach
    6. 5 Circuit 4: Differential Input with INA146
    7. 6 Circuit 5: Differential Input Modular
    8. 7 Voltage References and Ranges
    9. 8 References
  2.   Revision History

6 Circuit 5: Differential Input Modular

Circuit 1 can also be adapted for differential input. The changes require more effort, though; additionally, the attenuation stages are inverting, and the overall circuit looks more like a classic differential audio input. Note the use of matched components in this circuit. Figure 8 shows Circuit 5.

circuit_5_INA146_sboa097.gifFigure 8. Circuit 5 (Circuit 1 with Differential Input)
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