Overview
The AD537KH is a monolithic voltage-to-frequency (V-F) converter produced by Analog Devices Inc. This integrated circuit combines an input amplifier, a precision oscillator system, and an accurate internal reference generator to convert an analog input voltage into a proportional frequency output. The AD537KH is designed to operate over a wide range of supply voltages and temperatures, making it versatile for various industrial and commercial applications.
Key Specifications
| Parameter | Typical Value | Maximum Value |
|---|---|---|
| Frequency Range | 0 kHz to 150 kHz | |
| Nonlinearity (fMAX = 10 kHz) | ±0.1% | ±0.15% |
| Nonlinearity (fMAX = 100 kHz) | ±0.15% | ±0.25% |
| Full-Scale Calibration Error | ±5% | ±10% |
| Voltage Input Range (Single Supply) | 0 to (+VS – 4) Volts | |
| Voltage Input Range (Dual Supply) | –VS to (+VS – 4) Volts | |
| Input Bias Current | 100 nA | |
| Input Resistance (Noninverting) | 250 MΩ | |
| Input Offset Voltage | 5 mV max | |
| Reference Output Voltage | 1.00 Volt ± 5% | |
| Temperature Range (Rated Performance) | 0°C to +70°C | |
| Temperature Range (Storage) | –65°C to +150°C | |
| Quiescent Current | 1.2 mA (2.5 mA max) |
Key Features
- High accuracy and linearity in voltage-to-frequency conversion.
- Wide supply voltage range: 5 V to 36 V.
- Low input bias current and high input resistance.
- Internal reference generator with high stability.
- Temperature compensation for stable operation over a wide temperature range.
- 100% overrange capability up to 2000 µA input current.
- Available in various package options, including D-14 Ceramic DIP and H-10A Header.
Applications
The AD537KH is suitable for a variety of applications, including:
- Industrial control systems where precise analog-to-digital conversion is required.
- Medical devices that need accurate and reliable signal conversion.
- Aerospace and defense systems requiring high reliability and stability.
- Automotive systems for sensor signal processing.
- Energy metering and monitoring systems.
Q & A
- What is the primary function of the AD537KH?
The AD537KH is a voltage-to-frequency converter that converts an analog input voltage into a proportional frequency output. - What is the typical nonlinearity of the AD537KH at 10 kHz full-scale frequency?
The typical nonlinearity is ±0.1% at 10 kHz full-scale frequency. - What is the input bias current of the AD537KH?
The input bias current is 100 nA. - What is the temperature range for rated performance of the AD537KH?
The rated performance temperature range is 0°C to +70°C. - Can the AD537KH handle overrange input currents?
Yes, it has 100% overrange capability up to 2000 µA input current with slightly reduced linearity. - What are the available package options for the AD537KH?
The AD537KH is available in D-14 Ceramic DIP and H-10A Header packages. - What is the quiescent current of the AD537KH?
The quiescent current is 1.2 mA (2.5 mA max). - How stable is the internal reference generator of the AD537KH?
The internal reference generator has high stability, with a temperature coefficient of 50 ppm/°C. - Can the AD537KH operate with dual supply voltages?
Yes, it can operate with dual supply voltages ranging from –VS to (+VS – 4) Volts. - What is the maximum safe input voltage for the AD537KH?
The maximum safe input voltage is equal to the supply voltage on either input terminal.
