AD652:  Monolithic Synchronous Voltage-to-Frequency Converter

The AD652 Synchronous Voltage-to-Frequency Converter (SVFC) is a powerful building block for precision analog-to-digital conversion, offering typical nonlinearity of 0.002% (0.005% maximum) at a ...More

AD652:  Monolithic Synchronous Voltage-to-Frequency Converter

Product Description

The AD652 Synchronous Voltage-to-Frequency Converter (SVFC) is a powerful building block for precision analog-to-digital conversion, offering typical nonlinearity of 0.002% (0.005% maximum) at a 100 kHz output frequency. The inherent monotonicity of the transfer function and wide range of clock frequencies allows the conversion time and resolution to be optimized for specific applications.

The AD652 uses a variation of the popular charge-balancing technique to perform the conversion function. The AD652 uses an external clock to define the full-scale output frequency, rather than relying on the stability of an external capacitor. The result is a more stable, more linear transfer function, with significant application benefits in both single and multichannel systems.

Gain drift is minimized using a precision low drift reference and low TC on-chip thin-film scaling resistors. Furthermore, the initial gain error is reduced to less than 0.5% by the use of laser-wafer-trimming.

The analog and digital sections of the AD652 have been designed to allow operation from a single-ended power source, simplifying its use with isolated power supplies.

The AD652 is available in five performance grades. The 20-pin PLCC packaged JP and KP grades are specified for operation over the 0°C to +70°C commercial temperature range. The 16- pin cerdip-packaged AQ and BQ grades are specified for operation over the -40°C to +85°C industrial temperature range, and the AD652SQ is available for operation over the full -55°C to +125°C extended temperature range.

Features

  • Full-Scale Frequency (up to 2 MHz) set by external system clock
  • Extremely low linearity error (0.005% max at 1 MHz FS, 0.02% max at 2 MHz FS)
  • No critical external components required
  • Accurate 5V reference voltage
  • Low drift (25 ppm/°C max)
  • Dual- or single-supply operation
  • Voltage or current input
  • MIL-STD-883 compliant versions available

Diagrams

AD652 Diagram
Functional Block Diagram for AD652
价格、封装以及购买

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这是指该器件允许的工作温度范围。以下为所规定的三种温度范围：
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*这里所列出的美国报价单仅供预算参考，指美元报价（规定订量的每片美元，美国离岸价），如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因，国际报价可能不同。对于特殊批量报价，请与您当地的ADI公司办事处或代理商联络。对于评估板和套件的报价是指一个单位价格。
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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