AMC1211-Q1 Automotive High-Impedance, 2V Input, Basic Isolated Amplifier for Voltage Sensing |


Automotive High-Impedance, 2V Input, Basic Isolated Amplifier for Voltage Sensing


Learn about our reinforced isolated amplifier for voltage sensing  AMC1311-Q1.


The AMC1211A-Q1 is a precision, isolated amplifier with an output separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide basic galvanic isolation of up to 4.25 kVPEAK according to VDE V 0884-11 and UL1577. Used in conjunction with isolated power supplies, this isolated amplifier separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage.

The high-impedance input of the AMC1211A-Q1 is optimized for connection to high-voltage resistive dividers or other voltage signal sources with high output resistance. The excellent performance of the device supports accurate, low temperature drift voltage or temperature sensing and control in closed-loop systems. The integrated missing high-side supply voltage detection feature simplifies system-level design and diagnostics.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • 2-V, High-Impedance Input Voltage Range Optimized for Isolated Voltage Measurement
  • Low Offset Error and Drift:
    • ±1.5 mV (max), ±15 µV/°C (max)
  • Fixed Gain: 1
  • Very Low Gain Error and Drift:
    • ±0.3% (max), ±45 ppm/°C (max)
  • Low Nonlinearity and Drift: 0.01%, 1 ppm/°C (typ)
  • 3.3-V Operation on High-Side
  • Missing High-Side Supply Indication
  • Safety-Related Certifications:
    • 4250-VPK Basic Isolation per DIN V VDE V 0884-11 (VDE V 0884-11): 2017-01
    • 4250-VRMS Isolation for 1 Minute per UL1577
    • CAN/CSA No. 5A-Component Acceptance Service Notice

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Parametrics Compare all products in Isolated amplifiers

Input range (Vp-p)
Isolation working voltage VIOWM (rms) (V)
Isolation transient overvoltage VIOTM (peak) (V)
CMTI (Min) (kV/µs)
Input offset (+/-) (Max) (mV)
Input offset drift (+/-) (Typ) (uV/C)
Gain error (+/-) (Max) (%)
Gain error drift (+/-) (Typ) (ppm/°C)
Gain non-linearity (+/-) (Max) (%)
Small Signal Bandwidth (Typ) (kHz)
Operating temperature range (C)
AMC1211-Q1 AMC1311 AMC1311-Q1
2     2     2    
1000     1500     1500    
4250     7000     7000    
30     15     15    
1.5     9.9     9.9    
3     20     20    
0.3     1     1    
5     30     30    
0.04     0.04     0.04    
275     220     220    
Automotive     Catalog     Automotive    
-40 to 125     -40 to 125     -40 to 125