AD537:  Integrated Circuit Voltage-to-Frequency Converter

The AD537 is a monolithic V-F converter consisting of an input amplifier, a precision oscillator system, an accurate internal reference generator and a high current output stage. Only a single ...More

AD537:  Integrated Circuit Voltage-to-Frequency Converter

Product Description

The AD537 is a monolithic V-F converter consisting of an input amplifier, a precision oscillator system, an accurate internal reference generator and a high current output stage. Only a single external RC network is required to set up any full-scale (F.S.) frequency up to 100 kHz and any F.S. input voltage up to ±30 V. Linearity error is as low as ±0.05% for 10 kHz F.S., and operation is guaranteed over an 80 dB dynamic range. The overall temperature coefficient (excluding the effects of external components) is typically ±30 ppm/°C. The AD537 operates from a single supply of 5 V to 36 V and consumes only 1.2 mA quiescent current.

A temperature-proportional output, scaled to 1.00 mV/K, enables the circuit to be used as a reliable temperature-to-frequency converter; in combination with the fixed reference output of 1.00 V, offset scales such as 0°C or 0°F can be generated.

The low drift (1µV/°C typ) input amplifier allows operation directly from small signals (e.g., thermocouples or strain gages) while offering a high (250 M(Ohm) input resistance. Unlike most V-F converters, the AD537 provides a square-wave output, and can drive up to 12 TTL loads, LEDs, very long cables, etc.

The excellent temperature characteristics and long-term stability of the AD537 are guaranteed by the primary bandgap reference generator and the low T.C. silicon chromium thin film resistors used throughout.

The device is available in either a TO-116 ceramic DIP or a TO-100 metal can; both are hermetically sealed packages.

The AD537 is available in three performance/temperature grades; the J and K grades are specified for operation over the 0°C to +70°C range while the AD537S is specified for operation over the extended temperature range, -55°C to +125°C.

*Protected by Patent Nos. 3,88,963 and RE 20,586.

Features

  • Low Cost A-D Conversion
  • Versatile Input Amplifier
    - Positive or Negative Voltage Modes
    - Negative Current Mode
    - High Input Impedance, Low Drift
  • Single Supply, 5 V to 36 V
  • Linearity: ±0.05% FS
  • Low Power: 1.2 mA Quiescent Current
  • Full-Scale Frequency up to 100 kHz
  • 1.00 V Reference
  • Thermometer Output (1 mV/K)
  • F-V Applications
  • MIL-STD-883 Compliant Versions Available

Diagrams

AD537 Diagram
Pin Configuration for AD537
价格、封装以及购买

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温度范围
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：
  • 民用温度范围：0 ºC～＋70 ºC
  • 军用温度范围：－55ºC ～＋125ºC
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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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