The ADHV4702-1 is a high voltage (220 V), unity-gain stabilized precision operational amplifier. Analog Devices' next-generation proprietary semiconductor process and innovative architecture enable this precision op amp to operate from a 110 V symmetrical dual supply, an asymmetric dual supply, or a single 220 V supply.
The ADHV4702-1 has a typical open-loop gain (AOL) of 170 dB and a typical common-mode rejection ratio (CMRR) of 160 dB. The ADHV4702-1 has a maximum input offset voltage (VOS) drift of 2 V °C and an input voltage noise of 8 NV Hz. The ADHV4702-1's excellent dc accuracy is complemented by excellent dynamic performance, with a small signal bandwidth of 10 MHz and a slew rate of 74 V s. The output current of the ADHV4702-1 is typically 20 mA. In addition, it has unique features such as adjustable supply current, boost circuitry, and the flexibility to add bias voltage to the EPAD pad due to internal isolation, making it an ideal high-voltage solution for a wide range of applications.
Figure 1ADHV4702-1 output swing circuit and capability.
The ADHV4702-1 is the only small form factor amplifier on the market that offers high voltage and precision performance. The ADHV4702-1 solves several design challenges and can be used in many different applications, such as automated test equipment, life sciences, lidar, and healthcare. In automatic test equipment applications, this device can be used to measure currents on the high side and to generate accurate high voltage power supplies. In the life sciences, the ADHV4702-1 provides precise high-pressure control of mass spectrometry systems. In LiDAR applications, it can be used to precisely control APD bias. In medical applications, this product can be used to accurately control the bias point of silicon photomultiplier tubes.
Figure 2ADHV4702-1 precision performance.
The ADHV4702-1 is available in a 12-lead, 7mm, 7mm leadframe chip scale package (LFCSP) with exposed pads and is compliant with the IEC 61010-1 creepage and clearance standards. This package eliminates the need for supporting components such as dc-to-dc converters and floating power supplies, significantly reducing the size of the solution and simplifying the system architecture.
Figure 3Functional block diagram of the ADHV4702-1.
Figure 4ADHV4702-1 pin configuration.
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