Overview
The AD7725BS, produced by Analog Devices Inc., is a comprehensive 16-bit analog-to-digital converter (ADC) with integrated, user-programmable signal conditioning. This device is designed to provide high-performance conversion of analog signals into digital signals, making it suitable for a variety of applications that require precise and flexible signal processing.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 Bits |
| Sampling Rate | Up to 900 kSPS |
| Input Range | 0 V to +4 V (Single-Ended) or ±2 V (Differential) |
| Power Supplies | AVDD, DVDD: 5 V ± 5% |
| On-Chip Reference | 2.5 V Voltage Reference |
| Package | 44-Lead MQFP |
| Temperature Range | –40°C to +85°C |
| Differential Nonlinearity (DNL) | ±0.5 LSB |
| Integral Nonlinearity (INL) | ±2 LSB |
| DC CMRR | 80 dB |
| Offset Error | ±20 mV |
| Gain Error | ±0.5 %FSR |
Key Features
- User-programmable postprocessor with up to 130 million accumulates (MAC) per second.
- Three cascaded finite impulse response (FIR) filters.
- Parallel or serial interface for programming the postprocessor.
- Internal default filter for evaluation purposes.
- Accurate on-chip 2.5 V reference for the modulator.
- Reference input/output function allowing use of internal or external system reference.
- Crystal oscillator or external clock for setting the input sample rate.
Applications
- Radar and sonar systems.
- Auxiliary car functions.
- Medical devices.
- Communications systems.
Q & A
- What is the resolution of the AD7725BS ADC?
The AD7725BS has a resolution of 16 bits. - What is the maximum sampling rate of the AD7725BS?
The maximum sampling rate is up to 900 kSPS. - What is the input range of the AD7725BS?
The input range is 0 V to +4 V (single-ended) or ±2 V (differential). - What type of package does the AD7725BS come in?
The AD7725BS comes in a 44-lead MQFP package. - What is the temperature range for the AD7725BS?
The temperature range is –40°C to +85°C. - How is the postprocessor programmed in the AD7725BS?
The postprocessor can be programmed through a parallel or serial interface using a configuration file generated by the Filter Wizard tool. - What is the purpose of the Filter Wizard tool?
The Filter Wizard tool allows users to design different filter types and generates the appropriate configuration file for the postprocessor. - Does the AD7725BS have an internal reference voltage?
Yes, the AD7725BS has an accurate on-chip 2.5 V voltage reference for the modulator. - Can the AD7725BS use an external reference voltage?
Yes, the device allows either the internal reference or an external system reference to be used. - What are some typical applications of the AD7725BS?
Typical applications include radar, sonar, auxiliary car functions, medical devices, and communications systems.
