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Name: AD7731BRZ
Brand: Analog Devices Inc.
SKU: AD7731BRZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Analog Devices Inc. AD7731BRZ

Part No.:: AD7731BRZ

Manufacturer:: Analog Devices Inc.

Package:: 24-SOIC (0.295, 7.50mm Width)

Datasheet:: AD7731BRZ.pdf

Description:: IC ADC 24BIT SIGMA-DELTA 24SOIC

In Stock:: 3414

Quantity:: Add To Cart

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AD7731BRZ Specifications

Packaging:
Bulk,Tube
Series:
-
Product Status:
Active
Number of Bits:
24
Sampling Rate(PerSecond):
6.4k
Number of Inputs:
3, 5
Input Type:
Differential
Data Interface:
SPI, DSP
Configuration:
MUX-PGA-ADC
Ratio-S/H:ADC:
-
Number of A/D Converters:
1
Architecture:
Sigma-Delta
Reference Type:
External
Voltage-Supply Analog:
5V
Voltage-Supply Digital:
5V
Features:
PGA
Operating Temperature:
-40°C ~ 85°C

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AD7731BRZ information

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AD7731BRZ Typical application Circuitry

AD7731BRZ

The AD7731BRZ is a 24-bit analog-to-digital converter (ADC) with sigma-delta (Σ-Δ) modulation, designed for precision measurement applications. It is known for its high resolution, low noise, and excellent linearity, making it ideal for applications such as industrial process control, weigh scales, and other instrumentation where accurate analog-to-digital conversion is critical.

Application Scenarios

One of the primary applications of the AD7731BRZ is in industrial process control systems, where it can be used to convert analog sensor outputs (such as pressure, temperature, or flow rate) into digital signals for further processing and analysis.

Features of Parameters

Some of the AD7731BRZ's primary characteristics are:

- High precision measurements with a resolution of 24 bits.

- A programmable gain amplifier (PGA) that can amplify signals and has a range of 1 to 128.

- Internal or external reference voltage options for flexibility in system design.

- On-chip calibration features for offset and gain errors, ensuring accurate measurements.

- Low power consumption, making it suitable for battery-powered or energy-efficient systems.

Industrial Process Control System Circuit Design

The AD7731BRZ is a sensor interface that can be utilized in an industrial process control system. This is a thorough circuit design:

1. Interface Sensor: For differential measurement, connect the industrial sensor's output (such as a pressure sensor) to the AD7731BRZ's analog input pins AIN1(+) and AIN1(-). Measurement accuracy is increased and noise is decreased with this arrangement.

2. Setup of Reference Voltage: The REF IN(+) and REF IN(-) pins of the AD7731BRZ should be connected to a precise and steady 2.5V reference voltage source. For the ADC conversions to remain accurate, this reference voltage is essential.

3. Digital Communication: Interface the serial data output (DOUT), serial data input (DIN), and serial clock (SCLK) pins of the AD7731BRZ with the corresponding SPI pins of a microcontroller or a digital processor. This setup allows for efficient data transfer between the ADC and the processing unit.

4. Power Supply Considerations: Provide a clean and stable 5V supply to the AVDD and DVDD pins of the AD7731BRZ. Employ decoupling capacitors near these pins to filter out any power supply noise, ensuring smooth operation of the ADC.

5. Gain Configuration: If necessary, adjust the PGA gain through the SPI interface by writing to the gain register of the AD7731BRZ. This feature allows for the amplification of weak signals from the sensor, enhancing the resolution of the measurement.

6. Calibration Routine: Implement an on-chip calibration routine by sending appropriate commands to the AD7731BRZ via the SPI interface. This step is crucial for correcting any offset and gain errors, thereby improving the overall accuracy of the system.

Considerations for Design

The following factors should be considered while building a circuit utilizing the AD7731BRZ:

- Signal Integrity: Make sure that the appropriate grounding and shielding methods are used to reduce interference and noise in the analog signal line.

Stable Power source: Accurate ADC conversions require a power source that is both stable and noise-free. To do this, use filtering capacitors and linear regulators.

- Accurate Reference Voltage: The accuracy of the ADC is directly impacted by the reference voltage's precision. Select a voltage reference of the highest caliber, and buffer it if needed.

- Regular Calibration: To take drift and changes in system parameters over time into account, periodic calibration is required.

By carefully considering these aspects and following the detailed circuit design, you can effectively utilize the AD7731BRZ in an industrial process control system, ensuring accurate and reliable analog-to-digital conversion.

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6. What is the process for return or replacement of AD7731BRZ?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the AD7731BRZ we delivered, we will accept the replacement or return of the AD7731BRZ only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of AD7731BRZ.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations