Overview
The AD7484BST is a 14-bit, high-speed, low-power successive-approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This component is designed to provide excellent AC and DC performance specifications, making it suitable for a variety of high-speed data acquisition applications. The AD7484 features a parallel interface with throughput rates up to 3 million samples per second (MSPS) and includes a low noise, wide bandwidth track-and-hold circuit that can handle input frequencies in excess of 40 MHz.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Sampling Rate | Up to 3 MSPS |
| Analog Input Range | 0 V to 2.5 V (nominal), –200 mV to +2.7 V with offset shift |
| Reference Voltage | 2.5 V (internal or external) |
| Power Consumption | 90 mW (normal mode), 2.5 mW (NAP mode), 10 µW (STANDBY mode) |
| Conversion Time | 300 ns |
| Interface | Parallel |
| Package | Various packages available (e.g., TSSOP, LFCSP) |
Key Features
- High-speed successive-approximation ADC with up to 3 MSPS throughput rate.
- Low noise, wide bandwidth track-and-hold circuit capable of handling input frequencies over 40 MHz.
- On-board 2.5 V reference with the option to use an external reference source.
- Offset shift capability allowing analog input range adjustment from –200 mV to +2.7 V.
- Low power consumption with normal, NAP, and STANDBY power-saving modes.
- Parallel interface compatible with microcontrollers and DSPs.
- Factory trimming for high DC accuracy, resulting in low INL, offset, and gain errors.
Applications
- High-speed data acquisition systems.
- Medical imaging and diagnostic equipment.
- Aerospace and defense applications requiring high-speed ADCs.
- Industrial control and automation systems.
- Test and measurement instruments.
Q & A
- What is the resolution of the AD7484BST ADC?
The AD7484BST has a resolution of 14 bits. - What is the maximum sampling rate of the AD7484BST?
The maximum sampling rate is up to 3 million samples per second (MSPS). - What is the nominal analog input range of the AD7484BST?
The nominal analog input range is 0 V to 2.5 V, but it can be offset to –200 mV to +2.7 V. - Can the AD7484BST use an external reference voltage?
Yes, the AD7484BST can use either its internal 2.5 V reference or an external 2.5 V reference source. - What are the power consumption modes of the AD7484BST?
The AD7484BST has three power consumption modes: normal mode (90 mW), NAP mode (2.5 mW), and STANDBY mode (10 µW). - How long does the conversion process take for the AD7484BST?
The conversion time is 300 ns. - What type of interface does the AD7484BST use?
The AD7484BST uses a parallel interface. - Is the AD7484BST compatible with microcontrollers and DSPs?
Yes, the AD7484BST is directly compatible with microcontrollers and DSPs. - What are some common applications of the AD7484BST?
Common applications include high-speed data acquisition systems, medical imaging, aerospace and defense, industrial control, and test and measurement instruments. - How does the AD7484BST achieve low power dissipation?
The AD7484BST uses advanced design techniques to achieve very low power dissipation at high throughput rates.
