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A7840 Isolation Amplifier IC
The A7840 is a precision isolation amplifier IC designed to accurately transmit small analog signals while providing high-voltage galvanic isolation between the input and output. It integrates an optical coupling system that ensures excellent linearity, low offset, and high common-mode transient immunity, making it ideal for noise-sensitive and high-voltage applications.
With its wide bandwidth (~100 kHz) and 3750 Vrms isolation voltage, the A7840 reliably measures current, voltage, or other analog signals in electrically harsh environments. It’s a direct equivalent to the Broadcom HCPL-7840, offering dependable performance and high accuracy in industrial and power control systems.
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Features:-
- • Low Frequency Drift with Temperature 250ppm/°C
- • Low Distortion 1% (Sine Wave Output)
- • High Linearity 0.1% (Triangle Wave Output)
- • Wide Frequency Range 0.001Hz to 300kHz
- • Variable Duty Cycle 2% to 98%
- • High Level Outputs TTL to 28V
- • Simultaneous Sine, Square, and Triangle Wave Outputs
- • Easy to Use – Just a Handful of External Components Required
Specification:-
| Parameter | Min | Max | Unit |
| Ambient Operating Temperature | -40 | 85 | °C |
| Supply Voltage | 4.5 | 5.5 | V |
| Input Voltage (accurate and linear) | -200 | 200 | m V |
| Input Voltage (functional) | -2 | 2 | V |
Applications:
- Current and voltage sensing in motor drives and inverters
- Switched-mode power supplies (SMPS)
- Battery management systems (BMS) and energy metering
- Industrial process control and data acquisition systems
- Feedback isolation in power amplifiers and signal monitoring
*Product image for illustration purposes only, actual product may vary.
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