Overview
The AD9221AR is a high-performance, single-supply 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD9221/AD9223/AD9220 family, which offers a range of sampling rates and power consumption options, allowing system designers to select components based on their specific performance, sample rate, and power requirements. The AD9221AR features a multistage differential pipelined architecture with digital output error correction logic, ensuring 12-bit accuracy and no missing codes over the full operating temperature range. It includes an on-chip, high-performance, low-noise sample-and-hold amplifier and a programmable voltage reference, with the option to use an external reference for enhanced dc accuracy and temperature drift performance.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | 1.5 MSPS |
| Number of Analog In Channels | 1 |
| Input Type | Differential, Single Ended |
| Data Interface | Parallel |
| Architecture | Pipelined |
| Reference Type | Internal (with external option) |
| Voltage - Supply, Analog | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V |
| Package | 28-SOIC (0.295", 7.50mm Width) |
| Operating Temperature Range | –40°C to +85°C |
| Signal to Noise Ratio (SNR) | 11.5 bits or better ac performance |
| Differential Nonlinearity (DNL) | 0.75 LSB |
Key Features
- High-Performance ADC: The AD9221AR features a multistage differential pipelined architecture with digital output error correction logic, ensuring 12-bit accuracy and no missing codes over the full operating temperature range.
- Flexible Input Structure: The device supports both single-ended and differential inputs of varying amplitudes, which can be ac or dc coupled.
- On-Chip Sample-and-Hold Amplifier: A high-performance, low-noise sample-and-hold amplifier is integrated on-chip, suitable for both multiplexed systems and single-channel inputs.
- Programmable Voltage Reference: The device includes a programmable voltage reference, with the option to use an external reference for enhanced dc accuracy and temperature drift performance.[
- Low Power Consumption: The AD9221AR combines high speed with low power consumption, making it cost-effective and efficient.[
- Compatibility with Various Logic Families: The output drivers can be configured to interface with 5 V or 3.3 V logic families.[
Applications
- Imaging Systems: The flexible input structure and high dynamic performance make the AD9221AR suitable for imaging applications.
- Communication Systems: The device is well-suited for communication systems, particularly those employing IF Down Conversion, due to its excellent dynamic performance beyond the specified Nyquist frequency.[
- Medical Systems: The high accuracy and reliability of the AD9221AR make it a good choice for medical data-acquisition systems.[
- Data-Acquisition Systems: The device is ideal for various data-acquisition applications requiring high-speed and high-resolution analog-to-digital conversion.[
Q & A
- What is the sampling rate of the AD9221AR?
The AD9221AR has a sampling rate of 1.5 MSPS (Mega Samples Per Second).[
- What is the resolution of the AD9221AR?
The AD9221AR is a 12-bit analog-to-digital converter.[
- What types of input does the AD9221AR support?
The device supports both single-ended and differential inputs of varying amplitudes.[
- Can the AD9221AR use an external voltage reference?
- What is the operating temperature range of the AD9221AR?
- What is the package type of the AD9221AR?
- What is the signal to noise ratio (SNR) of the AD9221AR?
- Can the AD9221AR interface with different logic families?
- What is the differential nonlinearity (DNL) of the AD9221AR?
- In what applications is the AD9221AR commonly used?
