Overview
The AD654JR, produced by Analog Devices Inc., is a low-cost monolithic voltage-to-frequency (V/F) converter. It integrates an input amplifier, a precision oscillator system, and a high current output stage, making it a versatile component for various applications. The AD654JR can operate with a single supply voltage ranging from 5 V to 36 V and consumes only 2.0 mA of quiescent current. This converter is known for its high linearity, low drift, and stable operation over a wide range of operating conditions, including temperatures from -40°C to 85°C.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Frequency Range | 0 | - | 500 kHz | - |
| Nonlinearity (fMAX = 250 kHz) | 0.06% | 0.1% | - | - |
| Nonlinearity (fMAX = 500 kHz) | 0.20% | 0.4% | - | - |
| Full-Scale Calibration Error | -10% | - | 10% | - |
| Supply Voltage Range | 5 V | - | 36 V | - |
| Quiescent Current | - | 2.0 mA | - | - |
| Input Resistance | - | - | 250 MΩ | - |
| Operating Temperature Range | -40°C | - | 85°C | - |
Key Features
- High Linearity and Low Drift: The AD654JR offers excellent linearity with a nonlinearity error of 0.03% for a 250 kHz full-scale frequency and low drift of 4 µV/°C, making it suitable for high-precision applications.
- Versatile Input Amplifier: The input amplifier can handle both positive and negative voltage inputs and has a high input resistance of 250 MΩ, allowing direct connection to small signal sources like thermocouples or strain gauges.[
- Single Supply Operation: Operates from a single supply voltage ranging from 5 V to 36 V, making it versatile for various power supply conditions.
- Low Power Consumption: Consumes only 2.0 mA of quiescent current, which is beneficial for power-sensitive applications.[
- High Current Output Stage: The open-collector output stage can sink more than 10 mA with a saturation voltage less than 0.4 V, enabling it to drive up to 12 TTL loads, optocouplers, or long cables.[
- Compact Packaging: Available in both 8-lead mini-DIP and 8-lead SOIC packages, facilitating easy integration into various circuit designs.[
Applications
- Industrial Process Control: Suitable for monitoring and controlling industrial processes due to its high precision and reliability.
- Instrumentation and Measurement Systems: Used in various measurement systems where accurate voltage-to-frequency conversion is required.
- Data Acquisition Systems: Can be integrated into data acquisition systems for converting analog signals to digital signals.
- Analog-to-Digital Conversion: Can serve as an analog-to-digital converter when used with a single-component microcomputer.[
- Isolated Signal Transmission: Useful for transmitting signals over long distances or through isolation barriers.[
Q & A
- What is the AD654JR used for?
The AD654JR is a voltage-to-frequency (V/F) converter used for converting analog voltage signals into digital frequency signals. It can also serve as a frequency-to-voltage (F/V) converter and an analog-to-digital converter when paired with a microcomputer.
- What is the operating voltage range of the AD654JR?
The AD654JR operates from a single supply voltage ranging from 5 V to 36 V.
- What is the maximum frequency output of the AD654JR?
The AD654JR can produce a maximum frequency output of up to 500 kHz.
- What is the nonlinearity error of the AD654JR at 250 kHz full-scale frequency?
The nonlinearity error at 250 kHz full-scale frequency is 0.03%.[
- How much quiescent current does the AD654JR consume?
The AD654JR consumes 2.0 mA of quiescent current.[
- What is the input resistance of the AD654JR?
The input resistance of the AD654JR is 250 MΩ.[
- Can the AD654JR drive TTL loads directly?
Yes, the AD654JR can drive up to 12 TTL loads, optocouplers, or long cables directly from its open-collector output stage.[
- What are the packaging options for the AD654JR?
The AD654JR is available in both 8-lead mini-DIP and 8-lead SOIC packages.[
- What is the operating temperature range of the AD654JR?
The AD654JR operates over a temperature range of -40°C to 85°C.[
- Is the AD654JR RoHS compliant?
No, the AD654JR is not RoHS compliant.[
- What are some common applications of the AD654JR?
The AD654JR is commonly used in industrial process control, instrumentation and measurement systems, data acquisition systems, and analog-to-digital conversion.[
