Overview
The AD652JPZ-REEL, produced by Analog Devices Inc., is a monolithic synchronous voltage-to-frequency converter (SVFC) designed for precision analog-to-digital conversion. This component 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 available in several performance grades and package types, making it versatile for different operational environments.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Voltage-to-Frequency Mode Gain Error (fCLOCK = 200 kHz) | ±0.5% | ±1% | ±0.25% | % |
| Voltage-to-Frequency Mode Gain Error (fCLOCK = 1 MHz) | ±0.5% | ±1% | ±0.25% | % |
| Voltage-to-Frequency Mode Gain Error (fCLOCK = 4 MHz) | ±0.5% | ±1.5% | ±0.75% | % |
| Gain Temperature Coefficient (fCLOCK = 200 kHz) | ±25 ppm/°C | ±50 ppm/°C | ±15 ppm/°C | ppm/°C |
| Reference Output Voltage | 4.950 V | 5.0 V | 5.050 V | V |
| Reference Output Drift | 100 ppm/°C | 50 ppm/°C | ppm/°C | |
| Power Supply Rated Voltage | ±15 V | V | ||
| Operating Range (Dual Supply) | ±6 V to ±18 V | V | ||
| Operating Range (Single Supply) | +12 V to +36 V | V | ||
| Quiescent Current | ±11 mA | ±15 mA | mA | |
| Temperature Range (JP, KP Grade) | 0°C to +70°C | °C | ||
| Temperature Range (AQ, BQ Grade) | −40°C to +85°C | °C | ||
| Temperature Range (SQ Grade) | −55°C to +125°C | °C |
Key Features
- High Linearity and Stability: The AD652 achieves superior linearity and stability using an external clock to set the full-scale frequency, ensuring conversion accuracy independent of clock frequency variations.
- Minimal External Components: The AD652 requires only one noncritical external component (an integrator capacitor) for operation, simplifying the design process.
- Accurate 5 V Reference Voltage: Includes a buffered, accurate 5 V reference voltage with low drift (50 ppm/°C max).
- Dual- or Single-Supply Operation: Can operate from either dual or single power supplies, making it versatile for various system designs).
- TTL and CMOS Compatible Clock Input: The clock input is compatible with both TTL and CMOS logic levels, enhancing its usability in different digital systems).
- Low Drift and High Precision: Features low drift (25 ppm/°C max) and high precision due to the use of laser-wafer-trimming and on-chip thin-film scaling resistors).
Applications
- Precision Analog-to-Digital Conversion: Ideal for applications requiring high accuracy and stability in converting analog signals to digital frequencies.
- Industrial and Commercial Systems: Suitable for use in industrial and commercial environments due to its wide temperature range and robust design).
- Multi-Channel Systems: Can be used in both single- and multi-channel systems, offering benefits in terms of linearity and stability).
- Isolated Power Supplies: Designed to operate with isolated power supplies, making it suitable for applications requiring electrical isolation).
Q & A
- What is the primary function of the AD652JPZ-REEL?
The AD652JPZ-REEL is a synchronous voltage-to-frequency converter (SVFC) that converts an analog voltage input into a proportional digital frequency output.
- What is the significance of using an external clock in the AD652JPZ-REEL?
The external clock allows the AD652JPZ-REEL to achieve superior linearity and stability by defining the full-scale output frequency, independent of variations in clock frequency.
- How many external components are required for the AD652JPZ-REEL to operate?
The AD652JPZ-REEL requires only one noncritical external component, an integrator capacitor, for operation.
- What is the temperature range for the different grades of the AD652JPZ-REEL?
The temperature ranges are: 0°C to +70°C for JP and KP grades, −40°C to +85°C for AQ and BQ grades, and −55°C to +125°C for the SQ grade.
- Can the AD652JPZ-REEL operate with both dual and single power supplies?
Yes, the AD652JPZ-REEL can operate with both dual and single power supplies, enhancing its versatility in different system designs.
- What is the typical nonlinearity of the AD652JPZ-REEL at a 100 kHz output frequency?
The typical nonlinearity is 0.002% (0.005% maximum) at a 100 kHz output frequency.
- Is the AD652JPZ-REEL compatible with TTL and CMOS logic levels?
Yes, the clock input of the AD652JPZ-REEL is TTL and CMOS compatible.
- What is the maximum gain temperature coefficient for the AD652JPZ-REEL?
The maximum gain temperature coefficient is ±50 ppm/°C.
- What is the reference output voltage and drift of the AD652JPZ-REEL?
The reference output voltage is 5.0 V with a drift of 50 ppm/°C.
- What are the absolute maximum ratings for the total supply voltage and maximum input voltage?
The absolute maximum ratings are 36 V for both the total supply voltage and the maximum input voltage.
