Overview
The AD7765BRUZ is a high-performance 24-bit Sigma-Delta Analog-to-Digital Converter (ADC) produced by Analog Devices Inc. This device is designed for high-speed data acquisition of AC signals while also providing excellent DC specifications. It is particularly useful in applications where both AC and DC data are required, simplifying the front-end antialias filtering requirements. The AD7765BRUZ is available in a 28-lead TSSOP package and operates over an industrial temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 24 bits |
| Maximum Sample Rate | 156 kSPS |
| Dynamic Range | 112 dB at 156 kHz output data rate, 115 dB at 78.125 kHz output data rate |
| Oversampling Rates | Pin-selectable: 128× and 256× |
| Analog Input Range | ±3.2768 V differential (with a 4.096 V reference), biased around a common mode of 2.048 V |
| Package Type | 28-Lead TSSOP (4.4mm x 9.7mm) |
| Operating Temperature Range | -40°C to +85°C |
| Supply Voltages | AVDD1 = DVDD = 2.5 V, AVDD2 = AVDD3 = AVDD4 = 5 V |
Key Features
- High performance 24-bit Sigma-Delta ADC with wide input bandwidth and excellent DC specifications.
- Integrated buffer to drive the reference and a fully differential amplifier to buffer and level shift the input to the modulator.
- Pin-selectable decimation rates of 128× and 256×.
- Overrange alert pin to indicate when an input signal exceeds the acceptable range.
- Internal gain and internal over-range registers for minimal peripheral components.
- Low power mode without reducing the output data rate or available input bandwidth.
- On-board FIR filter for increased protection from signals above the Nyquist frequency.
Applications
The AD7765BRUZ is suitable for various high-speed data acquisition applications, including:
- Industrial process control and monitoring.
- Medical devices requiring high precision and low noise.
- Aerospace and defense systems needing robust and reliable ADCs.
- Test and measurement equipment where high accuracy is crucial.
- Automotive systems that require high-performance data acquisition.
Q & A
- What is the resolution of the AD7765BRUZ ADC?
The AD7765BRUZ has a resolution of 24 bits.
- What is the maximum sample rate of the AD7765BRUZ?
The maximum sample rate is 156 kSPS.
- What are the available oversampling rates for the AD7765BRUZ?
The oversampling rates are pin-selectable at 128× and 256×.
- What is the analog input range of the AD7765BRUZ with a 4.096 V reference?
The analog input range is ±3.2768 V differential, biased around a common mode of 2.048 V.
- In what package type is the AD7765BRUZ available?
The AD7765BRUZ is available in a 28-Lead TSSOP package.
- What is the operating temperature range of the AD7765BRUZ?
The operating temperature range is -40°C to +85°C.
- Does the AD7765BRUZ have a low power mode?
Yes, the AD7765BRUZ has a low power mode that reduces power dissipation without affecting the output data rate or input bandwidth.
- What type of filter does the AD7765BRUZ have on-board?
The AD7765BRUZ has an on-board FIR filter.
- What is the purpose of the overrange alert pin on the AD7765BRUZ?
The overrange alert pin indicates when an input signal exceeds the acceptable range.
- What are some typical applications of the AD7765BRUZ?
Typical applications include industrial process control, medical devices, aerospace and defense systems, test and measurement equipment, and automotive systems.
