Overview
The AD7864ASZ-1REEL is a high-speed, low-power, 4-channel simultaneous sampling 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This device operates from a single 5 V supply and is designed for applications requiring high accuracy and simultaneous sampling of multiple analog inputs.
The AD7864 features four track-and-hold amplifiers and a successive approximation ADC, allowing for the simultaneous sampling and conversion of any subset of the four channels. This makes it ideal for various applications, including AC motor control, uninterrupted power supplies, data acquisition systems, and communications.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | AD7864ASZ-1REEL |
| Manufacturer | Analog Devices Inc. |
| Package | 44-Lead MQFP (13.9mm x 10mm) |
| Number of Channels | 4 |
| Number of Bits | 12 |
| Sampling Rate | 520 ksps (per channel), 130 ksps (for all four channels) |
| Polarity | Bipolar |
| Integral Nonlinearity (INL) | 1 LSB |
| Differential Nonlinearity | 0.9 LSB |
| Supply Voltage | 5 V |
| Min Supply Voltage | 4.75 V |
| Power Dissipation | 90 mW typical, 20 μW in power saving mode |
| Track-and-Hold Acquisition Time | 0.35 μs |
| Conversion Time per Channel | 1.65 μs |
Key Features
- Simultaneous sampling of four analog inputs with tight aperture delay matching.
- Single 5 V supply operation with low power consumption (90 mW typical) and a power saving mode (20 μW typical).
- 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, and 0 V to 5 V.
- Hardware or software selectable channel sequence for conversion.
- Overvoltage protection on analog inputs.
- Compact 44-lead MQFP package.
Applications
- AC motor control
- Uninterrupted power supplies
- Data acquisition systems
- Communications
Q & A
- What is the AD7864ASZ-1REEL used for?
The AD7864ASZ-1REEL is a 4-channel simultaneous sampling 12-bit ADC used in applications such as AC motor control, uninterrupted power supplies, data acquisition systems, and communications.
- What is the sampling rate of the AD7864ASZ-1REEL?
The sampling rate is 520 ksps per channel and 130 ksps for all four channels when using the read-during-conversion sequence operation.
- What are the input voltage ranges for the AD7864ASZ-1REEL?
The input voltage ranges include ±10 V, ±5 V, 0 V to 2.5 V, and 0 V to 5 V.
- How does the AD7864ASZ-1REEL manage power consumption?
The device operates with a single 5 V supply and has a typical power consumption of 90 mW, with a power saving mode of 20 μW.
- What is the package type of the AD7864ASZ-1REEL?
The device is packaged in a 44-lead MQFP (13.9mm x 10mm).
- How are the channels selected for conversion in the AD7864ASZ-1REEL?
Channels can be selected for conversion via hardware (using channel select input pins) or software (programming the channel select register).
- What is the track-and-hold acquisition time of the AD7864ASZ-1REEL?
The track-and-hold acquisition time is 0.35 μs.
- What is the conversion time per channel for the AD7864ASZ-1REEL?
The conversion time per channel is 1.65 μs.
- Does the AD7864ASZ-1REEL have overvoltage protection?
Yes, the device has overvoltage protection on the analog inputs.
- How does the AD7864ASZ-1REEL interface with other components?
The device features a high-speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
