Overview
The AD7825BN is a high-performance, multi-channel analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD7822/AD7825/AD7829 family, known for their high speed and microprocessor compatibility. The AD7825BN is specifically designed with four input channels, making it suitable for various data acquisition and signal processing applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Resolution | 8-bit |
| Conversion Time | 420 ns |
| Throughput Rate | Up to 2 MSPS |
| Supply Voltage | 3 V ± 10%, 5 V ± 10% |
| 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%) |
| Operating Temperature | −40°C to +85°C |
| Package Type | 24-Lead PDIP, 24-Lead SOIC, 24-Lead TSSOP |
| On-Chip Reference | 2.5 V (2% tolerance) |
Key Features
- Fast conversion time of 420 ns, maximizing DSP processing time in real-time systems.
- Automatic power-down at the end of conversion to conserve power.
- Flexible parallel interface with End-of-Conversion (EOC) pulse for standalone operation.
- Analog input span adjustment via the VMID pin, allowing the user to offset the input span.
- On-chip reference of 2.5 V with a 2% tolerance.
- Track-and-hold amplifier and high-speed parallel interface.
Applications
- Data acquisition systems.
- DSP front ends.
- Disk drives.
- Mobile communication systems, including subsampling applications.
Q & A
- What is the resolution of the AD7825BN ADC?
The AD7825BN has an 8-bit resolution. - How many input channels does the AD7825BN have?
The AD7825BN has four input channels. - What is the maximum throughput rate of the AD7825BN?
The maximum throughput rate is up to 2 MSPS. - What are the supported supply voltages for the AD7825BN?
The AD7825BN can operate from a single 3 V ± 10% and 5 V ± 10% supply. - What is the conversion time of the AD7825BN?
The conversion time is 420 ns. - What types of packages are available for the AD7825BN?
The AD7825BN is available in 24-Lead PDIP, 24-Lead SOIC, and 24-Lead TSSOP packages. - Does the AD7825BN have an on-chip reference?
Yes, the AD7825BN has an on-chip reference of 2.5 V with a 2% tolerance. - What is the operating temperature range of the AD7825BN?
The operating temperature range is −40°C to +85°C. - Can the input span be adjusted on the AD7825BN?
Yes, the input span can be adjusted using the VMID pin. - What are some typical applications of the AD7825BN?
Typical applications include data acquisition systems, DSP front ends, disk drives, and mobile communication systems.
