Overview
The AD9225ARZRL is a monolithic, single-supply, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. It operates at a sampling rate of 25 million samples per second (MSPS) and features an on-chip, high-performance sample-and-hold amplifier and voltage reference. The AD9225 uses a multi-stage differential pipelined architecture with output error correction logic to ensure 12-bit accuracy and guarantees no missing codes over the full operating temperature range. This ADC is fabricated on a cost-effective CMOS process, combining high-speed precision analog circuits with high-density logic circuits, making it a complete single-chip solution for sampling and analog-to-digital conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | 25 MSPS |
| Number of Inputs | 1 |
| Input Type | Differential, Single Ended |
| Data Interface | Parallel |
| Architecture | Pipelined |
| Reference Type | External, Internal |
| Voltage - Supply, Analog | 5 V |
| Voltage - Supply, Digital | 2.85 V ~ 5.25 V |
| Power Dissipation | 280 mW |
| Package | 28-Lead SOIC, 28-Lead SSOP |
| Operating Temperature Range | -40°C to +85°C |
| SNR | 71 dB |
| SFDR | -85 dB |
Key Features
- Low Power Dissipation: The AD9225 consumes only 280 mW, making it a power-efficient solution.
- Single +5V Supply: Simplifies system power supply design and includes a separate digital driven supply line to accommodate 3 V and 5 V logic families.
- No Missing Codes Guaranteed: Ensures 12-bit accuracy over the full operating temperature range.
- On-Chip Sample-and-Hold Amplifier (SHA): The SHA input can be configured for either single-ended or differential inputs.
- Out-of-Range Indicator: The OTR output bit indicates when the input signal is beyond the AD9225’s input range.
- Straight Binary Output Data: Compatible with both 3 V and 5 V logic families.
- High Performance: Features a signal-to-noise ratio (SNR) of 71 dB and a spurious free dynamic range (SFDR) of -85 dB.
Applications
The AD9225 is suitable for a variety of high-speed data acquisition applications, including:
- Medical Imaging: Such as MRI and CT scanners where high-speed and high-accuracy ADCs are required.
- Industrial Automation: For high-speed data acquisition in industrial control systems.
- Communications: In wireless and wired communication systems that require fast and accurate analog-to-digital conversion.
- Test and Measurement Equipment: For oscilloscopes, spectrum analyzers, and other test equipment that demand high-speed and high-resolution ADCs.
Q & A
- What is the sampling rate of the AD9225?
The AD9225 has a sampling rate of 25 million samples per second (MSPS).
- What is the resolution of the AD9225?
The AD9225 is a 12-bit analog-to-digital converter.
- What types of input can the AD9225 handle?
The AD9225 can handle both single-ended and differential inputs.
- What is the power supply requirement for the AD9225?
The AD9225 uses a single 5 V power supply and can accommodate 3 V and 5 V logic families.
- Does the AD9225 have an on-chip sample-and-hold amplifier?
Yes, the AD9225 features an on-chip, high-performance sample-and-hold amplifier.
- What is the significance of the out-of-range indicator in the AD9225?
The out-of-range indicator (OTR) signals when the input signal is beyond the AD9225’s input range.
- What is the power dissipation of the AD9225?
The AD9225 consumes 280 mW of power.
- What are the available package options for the AD9225?
The AD9225 is available in 28-lead SOIC and 28-lead SSOP packages.
- What is the operating temperature range of the AD9225?
The AD9225 operates over a temperature range of -40°C to +85°C.
- Is the AD9225 compatible with 3 V logic?
Yes, the AD9225 is compatible with both 3 V and 5 V logic families.
