AD654 IC – Voltage to Frequency Converter IC

The AD654 is a monolithic V/F converter consisting of an input amplifier, a precision oscillator system, and a high current output stage. A single RC network is all that is required to set up any full scale (FS) frequency up to 500 kHz and any FS input voltage up to ? 30 V. Linearity error is only 0.03% for a 250 kHz FS, and operation is guaranteed over an 80 dB dynamic range. The overall temperature coefficient (excluding the effects of external components) is typically ?50 ppm/?C. The AD654 operates from a single supply of 5 V to 36 V and consumes only 2.0 mA quiescent current. The low drift (4 ?V/?C typ) input amplifier allows operation directly from small signals such as thermocouples or strain gauges while offering a high (250 M?) input resistance. Unlike most V/F converters, the AD654 provides a square-wave output, and can drive up to 12 TTL loads, optocouplers, long cables, or similar loads. 

Features:-

? Low Cost 

? Single or Dual Supply, 5 V to 36 V, 65 V to 618 V 

? Full-Scale Frequency Up to 500 kHz 

? Minimum Number of External Components Needed 

? Versatile Input Amplifier 

   -Positive or Negative Voltage Modes 

   -Negative Current Mode 

   -High Input Impedance, Low Drift 

? Low Power: 2.0 mA Quiescent Current 

? Low Offset: 1 mV  

Specification:-

Related Document:-

 AD654 IC Data Sheet