Overview
The AD7721AN is a 16-bit, sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed for low power consumption and high performance, making it suitable for a variety of applications requiring precise analog-to-digital conversion. The AD7721AN operates from a single +5 V supply and features a differential analog input range of 0 V to 2.5 V or ±1.25 V. It includes on-chip filtering that reduces the need for external antialiasing circuitry and provides a high-speed serial interface for data transfer.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 16-bit | |
| Output Word Rate (OWR) | 468.75 kHz | |
| Input Bandwidth | 229.2 kHz | |
| Supply Voltage | +5 V ± 5% | |
| Operating Temperature Range | –40°C to +85°C | |
| Power Consumption (Standby) | 70 µW | |
| Clock Frequency (Serial Mode) | Up to 15 MHz | |
| Package Type | 28-Pin PDIP |
Key Features
- 16-bit sigma-delta ADC with no missing codes
- High-speed serial interface with internal clocking capability
- Low-pass digital filter reducing external antialias requirements
- Linear phase response
- Power-down mode reducing power consumption to 70 µW
- CMOS construction ensuring low power dissipation
- Continuous sampling by an analog modulator at twice the clock frequency
- On-chip filtering reducing the need for external sample-and-hold circuitry
Applications
- Data acquisition systems
- Industrial control systems
- Medical devices requiring precise analog-to-digital conversion
- Aerospace and defense applications where low power and high accuracy are crucial
- Automotive systems needing robust and reliable ADCs
Q & A
- What is the resolution of the AD7721AN ADC?
The AD7721AN has a resolution of 16 bits.
- What is the output word rate of the AD7721AN?
The output word rate of the AD7721AN is 468.75 kHz.
- What is the input bandwidth of the AD7721AN?
The input bandwidth of the AD7721AN is up to 229.2 kHz.
- What is the supply voltage requirement for the AD7721AN?
The AD7721AN operates from a single +5 V supply with ±5% tolerance.
- What is the operating temperature range of the AD7721AN?
The operating temperature range of the AD7721AN is –40°C to +85°C.
- How much power does the AD7721AN consume in standby mode?
The AD7721AN consumes 70 µW in standby mode.
- What is the maximum clock frequency for the serial mode of the AD7721AN?
The maximum clock frequency for the serial mode is up to 15 MHz.
- What type of package is the AD7721AN available in?
The AD7721AN is available in a 28-Pin PDIP package.
- Does the AD7721AN require external sample-and-hold circuitry?
No, the AD7721AN does not require external sample-and-hold circuitry due to its on-chip filtering and continuous sampling by the analog modulator.
- What are some typical applications of the AD7721AN?
The AD7721AN is typically used in data acquisition systems, industrial control systems, medical devices, aerospace and defense applications, and automotive systems.
