Overview
The AD652JP-REEL7, produced by Analog Devices Inc., is a synchronous voltage-to-frequency converter (SVFC) designed for precision analog-to-digital conversion. This monolithic device is a powerful building block for various applications requiring accurate and stable frequency output based on input voltage. The AD652 uses a charge-balancing technique and an external clock to define the full-scale output frequency, ensuring high linearity and stability. It is particularly useful in both single- and multichannel systems due to its inherent monotonicity and wide range of clock frequencies.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Error (fCLOCK = 200 kHz) | ±0.5 | ±1 | ±0.25 | % |
| Gain Error (fCLOCK = 1 MHz) | ±0.5 | ±1 | ±0.25 | % |
| Gain Error (fCLOCK = 4 MHz) | ±0.5 | ±1.5 | ±0.25 | % |
| Gain Temperature Coefficient (fCLOCK = 200 kHz) | ±25 | ±50 | ±15 | ppm/°C |
| Reference Output Voltage | 4.950 | 5.0 | 5.050 | V |
| Reference Output Drift | 100 | 50 | ppm/°C | |
| Power Supply Rated Voltage | ±15 | ±15 | V | |
| Operating Range (Dual Supply) | ±6 | ±18 | V | |
| Quiescent Current | ±11 | ±15 | mA | |
| Temperature Range | 0°C | +70°C | °C |
Key Features
- External Clock for Full-Scale Frequency: The AD652 uses an external clock to set the full-scale output frequency, ensuring high linearity and stability.
- Low Linearity Error: Typical nonlinearity of 0.002% (0.005% maximum) at a 100 kHz output frequency.
- No Critical External Components: Requires only one noncritical external integrator capacitor for operation.
- Accurate 5 V Reference Voltage: Includes a buffered, accurate 5 V reference voltage with low drift (25 ppm/°C max).
- Dual- or Single-Supply Operation: Can operate from a single-ended power source or dual supplies, simplifying use with isolated power supplies.
- MIL-STD-883 Compliant Versions: Available in versions compliant with MIL-STD-883 for military and high-reliability applications.
Applications
- Precision Analog-to-Digital Conversion: Ideal for applications requiring precise analog-to-digital conversion, such as in data acquisition systems and precision measurement instruments.
- Single- and Multichannel Systems: Suitable for both single- and multichannel systems due to its inherent monotonicity and wide range of clock frequencies.
- Industrial and Military Applications: With versions compliant with MIL-STD-883, it is suitable for high-reliability and military applications.
- Isolated Power Supplies: Can be used with isolated power supplies, making it versatile for various industrial and medical applications).
Q & A
- What is the primary function of the AD652JP-REEL7?
The AD652JP-REEL7 is a synchronous voltage-to-frequency converter (SVFC) designed for precision analog-to-digital conversion.
- How does the AD652JP-REEL7 achieve its high linearity and stability?
The device uses an external clock to set the full-scale output frequency, ensuring high linearity and stability.
- What is the typical nonlinearity of the AD652JP-REEL7 at a 100 kHz output frequency?
The typical nonlinearity is 0.002% (0.005% maximum) at a 100 kHz output frequency).
- Does the AD652JP-REEL7 require any critical external components?
No, it requires only one noncritical external integrator capacitor for operation).
- What is the range of the reference output voltage of the AD652JP-REEL7?
The reference output voltage ranges from 4.950 V to 5.050 V).
- Can the AD652JP-REEL7 operate on a single power supply?
Yes, it can operate from a single-ended power source or dual supplies).
- What are the temperature ranges for the different grades of the AD652JP-REEL7?
The JP and KP grades operate from 0°C to +70°C, the AQ and BQ grades from −40°C to +85°C, and the SQ grade from −55°C to +125°C).
- Is the AD652JP-REEL7 compliant with any military standards?
Yes, it is available in versions compliant with MIL-STD-883 for military and high-reliability applications).
- What are some common applications of the AD652JP-REEL7?
Common applications include precision analog-to-digital conversion, single- and multichannel systems, industrial, and military applications.
- How does the AD652JP-REEL7 minimize gain drift?
The device minimizes gain drift using a precision low-drift reference and low TC, on-chip, thin-film scaling resistors).
