Overview
The AD7676AST is a 16-bit, high-performance analog-to-digital converter (ADC) produced by Analog Devices Inc. This successive-approximation register (SAR) ADC operates at a sampling rate of 500 kSPS and features a fully differential input structure. It is designed to provide excellent linearity and dynamic performance, making it suitable for a wide range of applications. The AD7676AST is fabricated using Analog Devices’ high-performance 0.6 micron CMOS process and is available in both 48-lead LQFP and 48-lead LFCSP packages, ensuring flexibility and space savings. The device operates from a single 5 V power supply and is specified to function over a temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| Sampling Rate | - | 500 | - | kSPS |
| Integral Nonlinearity (INL) | - | - | 1.0 | LSB |
| Signal-to-Noise Ratio (SNR) | 92 | 94 | - | dB |
| Total Harmonic Distortion (THD) | - | - | - | dB |
| Power Supply | - | 5 | - | V |
| Power Consumption (Typical) | - | 67 | - | mW |
| Power Consumption (Power-Down) | - | - | 7 | µW |
| Operating Temperature | -40 | - | 85 | °C |
| Package Type | - | - | - | 48-lead LQFP or 48-lead LFCSP |
Key Features
- Excellent Linearity: The AD7676AST has a maximum integral nonlinearity of 1.0 LSB with no missing 16-bit code.
- Superior AC Performance: It offers a minimum dynamic range of 92 dB, with a typical value of 94 dB.
- Fast Throughput: The ADC operates at a sampling rate of 500 kSPS, utilizing a charge redistribution SAR architecture with internal error correction circuitry.
- Single-Supply Operation: The device operates from a single 5 V supply, dissipating only 67 mW typically and consuming a maximum of 7 µW in power-down mode.
- Versatile Interface: It features both serial and parallel interface options, compatible with either 3 V or 5 V logic.
Applications
- CT Scanners: Suitable for high-resolution imaging applications.
- Data Acquisition and Instrumentation: Ideal for precision data acquisition systems.
- Spectrum Analysis: Used in various spectrum analysis applications due to its high dynamic range.
- Medical Instruments: Applied in medical devices requiring high accuracy and reliability.
- Battery-Powered Systems: Suitable for battery-powered systems due to its low power consumption.
- Process Control: Used in industrial process control systems for precise measurement and control.
Q & A
- What is the resolution of the AD7676AST ADC?
The AD7676AST has a resolution of 16 bits.
- What is the sampling rate of the AD7676AST?
The AD7676AST operates at a sampling rate of 500 kSPS.
- What is the maximum integral nonlinearity (INL) of the AD7676AST?
The maximum INL of the AD7676AST is 1.0 LSB.
- What is the typical power consumption of the AD7676AST?
The typical power consumption is 67 mW, with a maximum of 7 µW in power-down mode.
- What are the available package types for the AD7676AST?
The AD7676AST is available in both 48-lead LQFP and 48-lead LFCSP packages.
- What is the operating temperature range of the AD7676AST?
The operating temperature range is from –40°C to +85°C.
- Does the AD7676AST support both serial and parallel interfaces?
Yes, the AD7676AST supports both serial and parallel interface options, compatible with either 3 V or 5 V logic.
- What are some typical applications of the AD7676AST?
Typical applications include CT scanners, data acquisition and instrumentation, spectrum analysis, medical instruments, battery-powered systems, and process control.
- How is the AD7676AST calibrated?
The AD7676AST is hardware factory-calibrated to ensure accurate performance parameters such as SNR, THD, gain, offset, and linearity.
- What is the fabrication process used for the AD7676AST?
The AD7676AST is fabricated using Analog Devices’ high-performance 0.6 micron CMOS process.
