Overview
The AD7864ASZ-3 is a high-speed, low-power, 4-channel simultaneous sampling 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component operates from a single 5 V supply and is designed for applications requiring simultaneous sampling of multiple analog inputs. It features four track-and-hold amplifiers, a fast successive approximation ADC, and a high-speed parallel interface, making it ideal for various data acquisition and signal processing tasks.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Resolution | 12-bit |
| Analog Input Range | ±2.5 V (AD7864-3) |
| Conversion Time per Channel | 1.65 μs |
| Track-and-Hold Acquisition Time | 0.35 μs |
| Throughput Rate (all four channels) | 130 kSPS |
| Supply Voltage | 5 V ± 5% |
| Power Consumption (Normal Mode) | 90 mW typical |
| Power Consumption (Standby Mode) | 20 μW typical |
| Package Type | 44-Lead MQFP (13.9mm x 10mm) |
Key Features
- Simultaneous sampling of four analog inputs preserving relative phase information.
- Single 5 V supply operation with low power consumption (90 mW typical in normal mode and 20 μW typical in standby mode).
- High-speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
- Selection of input ranges: ±10 V, ±5 V, 0 V to 2.5 V, 0 V to 5 V, and ±2.5 V depending on the model variant.
- Hardware or software selectable channel sequence for conversion.
- Overvoltage protection on analog inputs.
- Tight aperture delay matching between the four input sample-and-hold amplifiers.
Applications
- AC motor control.
- Uninterrupted power supplies.
- Data acquisition systems.
- Communications systems.
Q & A
- What is the resolution of the AD7864ASZ-3 ADC?
The AD7864ASZ-3 has a resolution of 12 bits. - How many channels does the AD7864ASZ-3 support?
The AD7864ASZ-3 supports 4 channels. - What is the conversion time per channel for the AD7864ASZ-3?
The conversion time per channel is 1.65 μs. - What is the typical power consumption of the AD7864ASZ-3 in normal mode?
The typical power consumption in normal mode is 90 mW. - What is the package type of the AD7864ASZ-3?
The package type is a 44-Lead MQFP (13.9mm x 10mm). - Can the AD7864ASZ-3 be used in low-power applications?
- How does the AD7864ASZ-3 handle overvoltage on analog inputs?
The AD7864ASZ-3 features overvoltage protection on analog inputs.- What is the maximum throughput rate for all four channels of the AD7864ASZ-3?
The maximum throughput rate for all four channels is 130 kSPS.- Can the channel sequence for conversion be selected via hardware or software?
- What are some common applications of the AD7864ASZ-3?
- How does the AD7864ASZ-3 handle overvoltage on analog inputs?
