Overview
The AD7864ASZ-2, 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. It features four track-and-hold amplifiers, a fast successive approximation ADC, and a high-speed parallel interface, making it ideal for low power and portable applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Resolution | 12-bit |
| Input Ranges | 0 V to 2.5 V, 0 V to 5 V |
| Conversion Time per Channel | 1.65 μs max |
| Track-and-Hold Acquisition Time | 0.35 μs max |
| Throughput Rate (all four channels) | 130 kSPS max |
| 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) |
| Operating Temperature Range | −40°C to +85°C |
Key Features
- Simultaneous sampling of four analog inputs preserving relative phase information.
- Hardware or software selectable channel sequence for conversion.
- High-speed parallel interface compatible with 3 V processors.
- Low power consumption with a typical power dissipation of 90 mW in normal mode and 20 μW in standby mode.
- Overvoltage protection on analog inputs.
- Tight aperture delay matching between the four input sample-and-hold amplifiers.
- Single conversion start signal (CONVST) and end-of-conversion (EOC) and busy (BUSY) signals for sequence control.
Applications
- AC motor control.
- Uninterrupted power supplies.
- Data acquisition systems.
- Communications systems.
Q & A
- What is the resolution of the AD7864ASZ-2 ADC?
The AD7864ASZ-2 has a 12-bit resolution. - How many channels does the AD7864ASZ-2 support?
The AD7864ASZ-2 supports 4 channels. - What are the input voltage ranges for the AD7864ASZ-2?
The input voltage ranges for the AD7864ASZ-2 are 0 V to 2.5 V and 0 V to 5 V. - What is the conversion time per channel for the AD7864ASZ-2?
The conversion time per channel is 1.65 μs max. - What is the typical power consumption of the AD7864ASZ-2 in normal mode?
The typical power consumption in normal mode is 90 mW. - Does the AD7864ASZ-2 have overvoltage protection on analog inputs?
Yes, the AD7864ASZ-2 has overvoltage protection on analog inputs. - What is the package type of the AD7864ASZ-2?
The package type is a 44-Lead MQFP (13.9mm x 10mm). - What is the operating temperature range of the AD7864ASZ-2?
The operating temperature range is −40°C to +85°C. - Can the channel sequence for conversion be selected via hardware or software?
Yes, the channel sequence can be selected via either hardware (channel select input pins) or software (programming the channel select register). - What is the maximum throughput rate for all four channels?
The maximum throughput rate for all four channels is 130 kSPS.
