AD654 Monolithic V/F Converter
A versatile V/F converter offering precision and high performance.
- Supply Voltage: 5 V to 36 V
- Input Voltage Range: ±30 V
- Full-Scale Frequency: Up to 500 kHz
- Quiescent Current: 2.0 mA
- Input Resistance: 250 M?
- Output: Square-wave output
- Max Output Load: 12 TTL loads
- Operational Range: 80 dB dynamic range
Features:
- Low Cost
- Single or Dual Supply, 5 V to 36 V, 65 V to 618 V
- Full-Scale Frequency Up to 500 kHz
- Versatile Input Amplifier
The AD654 is a monolithic V/F converter that includes an input amplifier, a precision oscillator system, and a high current output stage. It requires only a single RC network to set up any full-scale frequency up to 500 kHz and any full-scale input voltage up to ±30 V. The linearity error is just 0.03% for a 250 kHz full-scale frequency with an operational guarantee over an 80 dB dynamic range.
The overall temperature coefficient is typically ±50 ppm/°C, excluding the effects of external components. The input amplifier with low drift (4 µV/°C typ) allows operation directly from small signals such as thermocouples or strain gauges, offering a high 250 M? input resistance. The AD654 provides a square-wave output and can drive up to 12 TTL loads, optocouplers, long cables, or similar loads.
Specifications:
- Supply Voltage: 36 V Maximum
- Input Voltage Range: -300 mV to +VS
- Maximum Output Current: ±18 V Instantaneous 50 mA, Sustained 25 mA
- Logic Common to ±VS: 500 mV to (+VS –4)
- Storage Temperature Range: -65°C to +150°C
Related Document: AD654 IC Data Sheet
* Images are for illustration only; actual product may vary.