Overview
The AD9221ARS 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 AD9221ARS features true 12-bit linearity and temperature drift performance, along with 11.5-bit or better AC performance. It is a complete, monolithic ADC with an on-chip, high-performance, low-noise sample-and-hold amplifier and a programmable voltage reference. An external reference can also be used to suit the DC accuracy and temperature drift requirements of the application.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | 1.25 MSPS |
| Input Type | Differential, Single-Ended |
| Supply Voltage | 4.75 V to 5.25 V |
| Package | 28-Lead SSOP |
| Temperature Range | -40°C to +85°C |
| Integral Nonlinearity (INL) | ±1.25 LSB |
| Differential Nonlinearity (DNL) | ±0.75 LSB |
| Signal to Noise Ratio (SNR) | Not specified in the provided sources, but typically high for this family of ADCs |
Key Features
- High-Performance ADC: The AD9221ARS features a multistage differential pipelined architecture with digital output error correction logic to provide 12-bit accuracy and ensure no missing codes over the full operating temperature range.
- Flexible Input Structure: The device allows for both single-ended and differential input interfaces with varying input spans, making it suitable for a wide range of applications.
- Low Noise Sample-and-Hold Amplifier: The on-chip sample-and-hold amplifier is designed for low noise and high performance, suitable for sampling single-channel inputs at frequencies up to and beyond the Nyquist rate.
- Programmable Voltage Reference: The ADC includes a programmable voltage reference, and an external reference can also be used to meet specific DC accuracy and temperature drift requirements.
- Low Power Consumption: The device 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-performance characteristics make the AD9221ARS suitable for imaging applications.
- Communication Systems: The device is well-suited for communication systems, especially those employing IF Down Conversion, due to its excellent dynamic performance.
- Medical Systems: The high accuracy and reliability of the AD9221ARS make it a good choice for medical data acquisition systems).
- Data Acquisition Systems: The device is suitable for various data acquisition applications requiring high-speed and high-resolution analog-to-digital conversion).
Q & A
- What is the resolution of the AD9221ARS?
The AD9221ARS has a resolution of 12 bits.
- What is the sampling rate of the AD9221ARS?
The AD9221ARS has a sampling rate of 1.25 MSPS.
- What types of input can the AD9221ARS handle?
The device can handle both differential and single-ended inputs.
- What is the supply voltage range for the AD9221ARS?
The supply voltage range is from 4.75 V to 5.25 V.
- What is the temperature range for the AD9221ARS?
The temperature range is from -40°C to +85°C.
- Does the AD9221ARS have an on-chip sample-and-hold amplifier?
Yes, the AD9221ARS includes an on-chip, high-performance, low-noise sample-and-hold amplifier.
- Can the AD9221ARS use an external voltage reference?
Yes, an external voltage reference can be used to suit specific DC accuracy and temperature drift requirements.
- What logic families can the AD9221ARS interface with?
The output drivers can be configured to interface with 5 V or 3.3 V logic families.
- What is the package type for the AD9221ARS?
The AD9221ARS is available in a 28-Lead SSOP package.
- Is the AD9221ARS RoHS compliant?
Some versions of the AD9221ARS are RoHS compliant, while others are not. It is important to check the specific part number for compliance.
