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AD654 Voltage to Frequency Converter IC
The AD654 is a high-performance, voltage-to-frequency converter (V/F converter) from Analog Devices, designed to convert an analog input voltage into a frequency output that is linearly proportional to the input. It offers excellent linearity, low drift, and wide operating range, making it ideal for data conversion, telemetry, and frequency-based analog signal transmission.
The AD654 integrates all the necessary functional blocks — precision reference, comparator, current source, and oscillator — into a single monolithic chip. It requires very few external components and operates from single or dual power supplies, making it a compact and cost-effective solution for analog-to-digital conversion using frequency output.
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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:-
| Parameter | Specification |
| Supply Voltage | 36 V |
| Maximum Input Voltage | ?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 |
Applications:
- Analog-to-digital conversion via frequency output
- Voltage-to-frequency or frequency-to-voltage conversion systems
- Data transmission in noisy or isolated environments
- Telemetry and remote monitoring
- Process control and measurement instrumentation
- Digital panel meters and sensor interfaces
- Frequency-based signal processing and control systems
*Product image for illustration purposes only, actual product may vary.
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