Overview
The AD7864ASZ-1, produced by Analog Devices Inc., is a high-speed, low-power, 4-channel simultaneous sampling 12-bit analog-to-digital converter (ADC). This component operates from a single 5 V supply and is designed for applications requiring simultaneous sampling of multiple analog inputs while preserving the relative phase information of the signals. The AD7864ASZ-1 features four track-and-hold amplifiers, a fast successive approximation ADC, and a high-speed parallel interface, making it suitable for various industrial and signal processing applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Resolution | 12 bits |
| Supply Voltage | 5 V (nominal), 4.75 V to 5.25 V |
| Input Ranges | ±10 V, ±5 V, ±2.5 V, 0 V to 2.5 V, 0 V to 5 V |
| Conversion Time | 1.65 μs per channel |
| Track-and-Hold Acquisition Time | 0.35 μs |
| Throughput Rate | Up to 500 kSPS for a single channel, up to 130 kSPS for all four channels |
| Power Consumption | Typically 90 mW in normal mode, 20 μW in standby mode |
| Package | 44-Lead MQFP (13.9mm x 10mm) |
| Operating Temperature | −40°C to +85°C |
| Differential Nonlinearity (DNL) | 0.9 LSB |
| Integral Nonlinearity (INL) | 1 LSB |
Key Features
- Simultaneous sampling of four analog inputs with tight aperture delay matching.
- High-speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
- Low power consumption with a typical power dissipation of 90 mW in normal mode and 20 μW in standby mode.
- Selection of input ranges: ±10 V, ±5 V, ±2.5 V, 0 V to 2.5 V, and 0 V to 5 V.
- Hardware or software selectable channel sequence for conversion.
- Overvoltage protection on analog inputs.
Applications
- AC motor control.
- Uninterrupted power supplies.
- Data acquisition systems.
- Communications.
Q & A
- What is the resolution of the AD7864ASZ-1 ADC?
The AD7864ASZ-1 has a resolution of 12 bits. - How many channels does the AD7864ASZ-1 support?
The AD7864ASZ-1 supports 4 channels. - What are the input voltage ranges for the AD7864ASZ-1?
The input voltage ranges include ±10 V, ±5 V, ±2.5 V, 0 V to 2.5 V, and 0 V to 5 V. - What is the conversion time per channel for the AD7864ASZ-1?
The conversion time per channel is 1.65 μs. - How is the channel sequence for conversion selected?
The channel sequence can be selected via hardware (channel select input pins) or software (programming the channel select register). - What is the typical power consumption of the AD7864ASZ-1 in normal mode?
The typical power consumption in normal mode is 90 mW. - What is the package type of the AD7864ASZ-1?
The package type is a 44-Lead MQFP (13.9mm x 10mm). - What is the operating temperature range of the AD7864ASZ-1?
The operating temperature range is −40°C to +85°C. - Does the AD7864ASZ-1 have overvoltage protection on analog inputs?
Yes, the AD7864ASZ-1 has overvoltage protection on analog inputs. - What are some typical applications of the AD7864ASZ-1?
Typical applications include AC motor control, uninterrupted power supplies, data acquisition systems, and communications.
