Overview
The AD7651AST is a 16-bit, 100 kSPS (kilosamples per second) analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the PulSAR™ family and is known for its high-speed, low-power, and high-performance characteristics. The AD7651 operates from a single 5 V power supply and features an internal reference, error correction circuits, and both serial and parallel system interface ports. It is fabricated using Analog Devices’ high-performance successive approximation register (SAR) architecture.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | 16 | 16 | 16 | Bits | |
| Analog Input Voltage Range | VIN - VINGND | 0 | VREF | V | |
| Throughput Speed | 100 kSPS | kSPS | |||
| Power Dissipation | Without REF | 16 mW | 160 µW @ 1 kSPS | mW/µW | |
| With REF | 38 mW | mW | |||
| Integral Linearity Error | -6 | +6 | LSB | ||
| Differential Linearity Error | -2 | +3 | LSB | ||
| Input Current | 100 kSPS | 1.1 µA | µA | ||
| Input Impedance | 10 µs | µs |
Key Features
- Fast Throughput: The AD7651 offers a throughput rate of 100 kSPS, making it suitable for high-speed data acquisition applications.
- Internal Reference: The ADC includes an internal reference with a typical temperature drift of 7 ppm/°C, ensuring stable and accurate conversions.
- Single-Supply Operation: It operates from a single 5 V power supply, reducing the complexity of the power supply design.
- Flexible Interface: The component features both parallel and serial interface options, compatible with both 3 V and 5 V logic, enhancing its versatility in various system designs.
- Low Power Consumption: The power dissipation decreases with throughput, making it energy-efficient, especially in battery-powered systems.
Applications
- Data Acquisition: Ideal for high-speed data acquisition systems due to its fast throughput and low power consumption.
- Instrumentation: Suitable for various instrumentation applications requiring precise and fast analog-to-digital conversions.
- Digital Signal Processing: Used in DSP applications where high-speed and accurate data conversion is critical.
- Spectrum Analysis: Applicable in spectrum analysis due to its high performance and low noise characteristics.
- Medical Instruments: Used in medical devices where precision and reliability are paramount.
- Battery-Powered Systems: Suitable for battery-powered systems due to its low power consumption.
- Process Control: Employed in process control systems requiring accurate and fast data conversion.
Q & A
- What is the resolution of the AD7651AST?
The AD7651AST has a resolution of 16 bits. - What is the throughput rate of the AD7651AST?
The throughput rate of the AD7651AST is 100 kSPS. - What is the operating voltage range of the AD7651AST?
The AD7651AST operates from a single 5 V power supply. - Does the AD7651AST have an internal reference?
Yes, the AD7651AST includes an internal reference with a typical temperature drift of 7 ppm/°C. - What types of interfaces does the AD7651AST support?
The AD7651AST supports both parallel and serial interfaces, compatible with both 3 V and 5 V logic. - What is the typical power dissipation of the AD7651AST?
The typical power dissipation is 16 mW without the reference and 38 mW with the reference. - What are the common applications of the AD7651AST?
The AD7651AST is commonly used in data acquisition, instrumentation, digital signal processing, spectrum analysis, medical instruments, battery-powered systems, and process control. - What is the input voltage range of the AD7651AST?
The analog input voltage range is from 0 V to VREF (typically 2.5 V). - Is the AD7651AST suitable for low-power applications?
Yes, the AD7651AST is suitable for low-power applications as its power dissipation decreases with throughput. - What package types are available for the AD7651AST?
The AD7651AST is available in 48-lead LQFP and 48-lead LFCSP packages.
