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Description
High CMR Isolation Amplifiers
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Description
The HCPL-7800(A) isolation amplifer family was designed for current sensing in electronic motor drives. In a typical implementation, motor currents flow through an external resistor and the resulting analog voltage drop is sensed by the HCPL-7800(A). A differential output voltage is created on the other side of the HCPL-7800(A) optical isolation barrier. This differential output voltage is proportional to the motor current and can be converted to a single-ended signal by using an op-amp as shown in the recommended application circuit. Since common-mode voltage swings of several hundred volts in tens of nanoseconds are common in modern switching inverter motor drives, the HCPL-7800(A) was designed to ignore very high common-mode transient slew rates (of at least 10KV/μs).
The high CMR capability of the HCPL-7800(A) isolation amplifier provides the precision and stability needed to accurately monitor motor current in high noise motor control environ-ments, providing for smoother control (less "torque ripple") in various types of motor control applications.
The product can also be used for general analog signal isolation applications requiring high accuracy, stability, and linearity under similarly severe noise conditions. For general applications, we recommend the HCPL-7800 (gain tolerance of ±3%). For precision applications Avago Technologies offers the HCPL-7800A with part-to-part gain tolerance of ±1%. The HCPL-7800(A) utilizes sigma delta (Σ-Δ) analog-to-digital converter technology, chopper stabilized amplifiers, and a fully differential circuit topology.
Together, these features deliver unequaled isolation-mode noise rejection, as well as excellent offset and gain accuracy and stability over time and temperature. This performance is delivered in a compact, auto-insert-able, industry standard 8-pin DIP package that meets worldwide regulatory safety standards. (A gull-wing surface mount option #300 is also available).
Features
● 15KV/μs Common-Mode Rejection at VCM= 1000V
● Compact, Auto-Insertable Standard 8-pin DIP Package
● 0.00025 V/V/℃ Gain Drift vs. Temperature
● 0.3mV Input Offset Voltage
● 100 kHz Bandwidth
● 0.004% Nonlinearity
● Worldwide Safety Approval:UL 1577 (3750Vrms/1 min.) and CSA, IEC/EN/DIN EN 60747-5-2
● Advanced Sigma-Delta (Σ-Δ) A/D Converter Technology
● Fully Differential Circuit Topology
Applications
● 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
Preview of the first 3 pages of the data sheet
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6 buyer reviews from Philippines
Joseph Scott
Length of registration:7 years
The HCPL-7800A-500E integrated circuit is a great choice for any project that requires a reliable and efficient circuit. It is easy to install and use, and its performance is excellent. The circuit is highly reliable and has a long life span. It is also very cost-effective, making it a great choice for any budget. I highly recommend this integrated circuit for anyone looking for a reliable and eff
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Reply0
03/17/2023
Miguel Sanchez
Length of registration:7 years
THANKS! Great Job!
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Reply0
03/07/2017
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HCPL-7800
HCPL-7800 has several brands around the world that may have alternate names for HCPL-7800 due to regional differences or acquisition. HCPL-7800 may also be known as the following names:
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