HCPL-7840-000E - Brand New AVAGO Isolation Amplifiers
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Description
The HCPL-7840 isolation amplifier is a member of the HCPL-7840 family which has been designed specifically for current sensing in electronic motor drives. In typical implementation, motor currents flow through an external resistor, and the resulting analog voltage drop is sensed by the HCPL-7840. The isolation barrier then creates a differential output voltage. This voltage is proportional to the motor current and can be converted to a single-ended signal using an op-amp as indicated in the recommended application circuit.
Due to the swings of several hundred volts in modern switching inverter motor drives, the HCPL-7840 is designed to ignore common mode transitions with high slew rates of at least 10 kV/μs. With a high common-mode rejection capability, the HCPL-7840 can deliver the accuracy and stability necessary for accurately monitoring motor current across diverse types of motor control applications, hence providing for smoother control with less “torque ripple”.
Specifications and features
- 15 kV/μs common-mode rejection at VCM = 1000 V
- Compact, auto-insertable standard 8-pin DIP package
- 0.00025 V/V/°C gain drift vs. temperature
- 0.3 mV input offset voltage
- 100 kHz bandwidth
- 0.004% nonlinearity
- Worldwide safety approvals: UL 1577 (3750 Vrms/1 min.), CSA, IEC/EN/DIN EN 60747-5-2
- Advanced sigma-delta (∑-Δ) A/D converter technology
- Fully differential circuit topology
- 0.8 μm CMOS IC technology
Application Scenarios
- Motor phase and rail current sensing
- Inverter current sensing
- Switched mode power supply signal isolation
- General purpose current sensing and monitoring
- General purpose analog signal isolation
Comparison
Advantages- High common-mode rejection capability of at least 10 kV/μs
- Accurate monitoring of current across diverse types of motor control applications to deliver smoother control with less “torque ripple”.
- 0.004% non-linearity ensures precision in motor current monitoring.
- Fully differential circuit topology for noise immunity.
Disadvantages- The HCPL-7840 is not ideal for higher current applications since it has a limited input range of 50 mA.
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Datasheet
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Shopping guide
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- Datasheet: Download HCPL-7840-000E
- Chipdatas Part: CD84-HCPL-7840-000E
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/05/20 20:23 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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