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The ADHV4702-1 is a high voltage (220 V), unity gain stable precision operational amplifier. ADI's next generation proprietary semiconductor process and innovative architecture enable this precision operational amplifier to operate from ±110 V symmetrical dual supplies, asymmetrical dual supplies, or a 220 V single supply.
The ADHV4702-1 has a typical open-loop gain (A
OL
) of 170 dB and a typical common-mode rejection ratio (CMRR) of 160 dB. The maximum input offset voltage (V
OS
) drift of the ADHV4702-1 is 2 µV/°C, and the input voltage noise is 8 nV/√Hz. The excellent DC precision of the ADHV4702-1 is complemented by excellent dynamic performance, with a small signal bandwidth of 10 MHz and a slew rate of 74 V/µs. The output current of the ADHV4702-1 is typically 20 mA. In addition, it has some unique features, such as adjustable supply current, boost circuit, and EPAD pad, which can flexibly add bias voltage due to internal isolation, making it an ideal high-voltage solution for various applications.
Figure 1. ADHV4702-1 output swing circuit and capabilities.
The ADHV4702-1 is the first amplifier on the market to provide high voltage and precision performance in a small footprint. The ADHV4702-1 solves several design challenges and can be used in a variety of different applications such as automatic test equipment, life sciences, LiDAR, and healthcare. In automatic test equipment applications, this device can be used to measure current on the high voltage side and generate a precise high voltage power supply. In the field of life sciences, the ADHV4702-1 can implement precise high voltage control for mass spectrometry systems. In LiDAR applications, it can be used to accurately control the APD bias voltage. In medical applications, this product can be used to accurately control the bias point of silicon photomultipliers.
Figure 2. ADHV4702-1 precision performance.
The ADHV4702-1 is available in a 12-lead, 7mm × 7mm lead frame chip scale package (LFCSP) with an exposed pad that complies with the International Electrotechnical Commission IEC 61010-1 creepage and clearance standards. This package eliminates the need for supporting components such as dc-to-dc converters and floating supplies, significantly reducing solution size and simplifying system architecture.
Figure 3. ADHV4702-1 functional block diagram.
Figure 4. ADHV4702-1 pin configuration.
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Wide operating voltage range
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Dual supply: ±12 V to ±110 V
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Asymmetrical power supply: 24 V to 220 V
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Wide input common-mode voltage range: rail 3 V
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High common mode rejection ratio: 160 dB (typical)
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High AOL : 170 dB (typical)
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High slew rate
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74 V/μs (typical)
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24 V/μs typical with external input clamping diode
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Low input bias current: 2 pA (max)
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Low input offset voltage: 1 mV maximum
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Low input offset voltage drift: 2μV/°C maximum
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Low input voltage noise: 8 nV/√Hz (typical) at 10 kHz
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Wide small signal bandwidth: 10 MHz (typical)
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Resistor-Adjustable Quiescent Current: 0.6 mA to 3 mA (V S = ±110 V)
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Unity-gain stable
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Thermal monitoring
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Small size: 12-lead 7 mm × 7 mm LFCSP, compliant with IEC 61010-1 pitch standards
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Shutdown Mode
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