Overview
The AD7822BR-REEL, manufactured by Analog Devices Inc., is a high-speed, 8-bit analog-to-digital converter (ADC) designed for various data acquisition and signal processing applications. This component is part of the AD7822/AD7825/AD7829 family, known for their microprocessor compatibility and fast conversion times. The AD7822BR-REEL is particularly suited for systems requiring rapid and accurate analog-to-digital conversions.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 8 bits |
| Conversion Time | 420 ns |
| Sampling Rate | Up to 2 MSPS |
| Input Channels | 1 channel (single-ended) |
| Input Range | 0 V to 2 V p-p (VDD = 3 V ± 10%), 0 V to 2.5 V p-p (VDD = 5 V ± 10%) |
| Supply Voltage | 3 V ± 10%, 5 V ± 10% |
| Package Type | 20-lead SOIC (Small Outline IC) |
| Operating Temperature | -40°C to +85°C |
| Interface | Parallel interface with EOC pulse |
| On-chip Reference | 2.5 V (2% tolerance) |
| RoHS Compliance | Yes (for certain versions) |
Key Features
- Fast conversion time of 420 ns, maximizing DSP processing time in real-time systems.
- On-chip track-and-hold amplifier and 2.5 V reference.
- Flexible parallel interface with End-of-Conversion (EOC) pulse for standalone operation.
- Automatic power-down at the end of conversion to reduce power consumption.
- Analog input span adjustment via the VMID pin.
- High SNR performance for input frequencies up to 10 MHz.
Applications
- Data acquisition systems.
- DSP front ends.
- Disk drives.
- Mobile communication systems and subsampling applications.
Q & A
- What is the resolution of the AD7822BR-REEL ADC?
The AD7822BR-REEL has an 8-bit resolution.
- What is the maximum sampling rate of the AD7822BR-REEL?
The maximum sampling rate is up to 2 MSPS.
- What are the input voltage ranges for the AD7822BR-REEL?
The input voltage ranges are 0 V to 2 V p-p for VDD = 3 V ± 10% and 0 V to 2.5 V p-p for VDD = 5 V ± 10%.
- What is the conversion time of the AD7822BR-REEL?
The conversion time is 420 ns.
- Does the AD7822BR-REEL have an on-chip reference?
Yes, it has an on-chip 2.5 V reference with a 2% tolerance.
- What is the operating temperature range of the AD7822BR-REEL?
The operating temperature range is -40°C to +85°C.
- Is the AD7822BR-REEL RoHS compliant?
Yes, certain versions of the AD7822BR-REEL are RoHS compliant.
- What type of interface does the AD7822BR-REEL use?
The AD7822BR-REEL uses a parallel interface with an EOC pulse.
- Does the AD7822BR-REEL support automatic power-down?
Yes, it supports automatic power-down at the end of conversion.
- What are some common applications of the AD7822BR-REEL?
Common applications include data acquisition systems, DSP front ends, disk drives, and mobile communication systems.
