Overview
The AD7621AST is a 16-bit, 3 MSPS (Mega Samples Per Second), charge redistribution Successive Approximation Register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single 2.5 V power supply and is known for its high speed and superior linearity. The AD7621AST features an internal reference, error correction circuits, and versatile interface options, making it suitable for a variety of high-performance applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Bits | 16 | |
| Sampling Rate | Up to 3 MSPS | |
| Power Supply | 2.5 V | V |
| Power Dissipation (Typical) | 65 mW | mW |
| Internal Reference Voltage | 2.048 V | V |
| Temperature Range | −40°C to +85°C | °C |
| Interface Options | Serial (2-wire) or Parallel (16- or 8-bit bus) | |
| Package Type | 48-Lead Low Profile Quad Flatpack (LQFP) |
Key Features
- Fast Throughput: The AD7621AST offers high-speed sampling rates up to 3 MSPS.
- Superior Linearity: No missing 16-bit codes ensure high accuracy.
- Internal Reference: A 2.048 V internal reference with a typical drift of ±7 ppm/°C.
- Single-Supply Operation: Operates from a single 2.5 V power supply.
- Flexible Interface: Supports both serial and parallel interface configurations compatible with 2.5 V, 3.3 V, or 5 V logic.
- Low Power Mode: An impulse mode reduces power dissipation with decreased throughput.
Applications
The AD7621AST is suitable for various high-performance applications, including:
- Medical imaging and diagnostics
- Industrial process control and automation
- Aerospace and defense systems
- High-speed data acquisition systems
- Test and measurement equipment
Q & A
- What is the sampling rate of the AD7621AST?
The AD7621AST has a sampling rate of up to 3 MSPS. - What is the power supply voltage for the AD7621AST?
The AD7621AST operates from a single 2.5 V power supply. - Does the AD7621AST have an internal reference?
Yes, the AD7621AST has a 2.048 V internal reference. - What are the interface options for the AD7621AST?
The AD7621AST supports both serial (2-wire) and parallel (16- or 8-bit bus) interfaces. - What is the temperature range for the AD7621AST?
The AD7621AST operates from −40°C to +85°C. - What is the typical power dissipation of the AD7621AST?
The typical power dissipation is 65 mW. - Does the AD7621AST have a low power mode?
Yes, the AD7621AST has an impulse mode that reduces power dissipation with decreased throughput. - What type of package does the AD7621AST come in?
The AD7621AST comes in a 48-Lead Low Profile Quad Flatpack (LQFP) package. - Is the AD7621AST suitable for high-speed applications?
Yes, the AD7621AST is designed for high-speed applications due to its fast throughput and superior linearity. - Can the AD7621AST be used in medical imaging?
Yes, the AD7621AST is suitable for medical imaging and diagnostics due to its high accuracy and speed.
