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Name: AD7797BRUZ
Brand: Analog Devices Inc.
SKU: AD7797BRUZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Analog Devices Inc. AD7797BRUZ

Part No.:: AD7797BRUZ

Manufacturer:: Analog Devices Inc.

Package:: 16-TSSOP (0.173, 4.40mm Width)

Datasheet:: AD7797BRUZ.pdf

Description:: IC ADC 24BIT SIGMA-DELTA 16TSSOP

In Stock:: 3871

Quantity:: Add To Cart

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AD7797BRUZ Specifications

Packaging:
Tube
Series:
-
Product Status:
Active
Number of Bits:
24
Sampling Rate(PerSecond):
123
Number of Inputs:
1
Input Type:
Differential
Data Interface:
SPI, DSP
Configuration:
MUX-ADC
Ratio-S/H:ADC:
-
Number of A/D Converters:
1
Architecture:
Sigma-Delta
Reference Type:
External
Voltage-Supply Analog:
2.7V ~ 5.25V
Voltage-Supply Digital:
2.7V ~ 5.25V
Features:
Temperature Sensor
Operating Temperature:
-40°C ~ 85°C

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AD7797BRUZ information

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AD7797BRUZ Typical application Circuitry

AD7797BRUZ

An analog-to-digital converter (ADC) with 24 bits of sigma-delta precision and low power consumption, the AD7797BRUZ is intended for high-precision measurements in control and instrumentation systems. Applications requiring high accuracy and low noise, such temperature monitoring systems, pressure sensors, and weigh scales, are especially well suited for this ADC.

Application Scenarios:

1. Weigh Scales: The AD7797BRUZ can be used in electronic scales for precise weight measurements.

2. Temperature Sensing: It is suitable for high-resolution temperature sensing applications, such as RTD (Resistance Temperature Detector) or thermocouple interfacing.

3. Pressure Measurement: The ADC can be used in pressure sensing applications for industrial control systems.

Features of the parameter:

1. Resolution: With a 24-bit resolution, the AD7797BRUZ allows for excellent measurement precision.

2. Input Channels: Three differential analog input channels are available.

3. Low Power Consumption: The ADC is appropriate for battery-powered devices because it is built for low power operation.

4. On-Chip Reference: In many applications, the integrated 1.17V reference eliminates the requirement for an external reference.

5. Interface: To communicate with microcontrollers or digital systems, the gadget has a serial peripheral interface (SPI).

Detailed Circuit Design for Temperature Measurement:

In this application scenario, we'll design a circuit for temperature measurement using the AD7797BRUZ and a Pt100 RTD sensor.

1. Sensor Connection: Connect the Pt100 RTD sensor to the differential analog input channels AIN1(+) and AIN1(-) of the AD7797BRUZ. This allows for differential measurement, which helps reduce noise and increase accuracy.

2. Reference Voltage: To set the reference voltage of the ADC, use the inbuilt 1.17V reference of the AD7797BRUZ. This removes the requirement for an external reference, simplifying the circuit.

3. Power source: Give the AD7797BRUZ's AVDD and DVDD pins a steady 3.3V power source. In order to keep the ADC's precision, make sure the power supply produces little noise.

4. Interface SPI: For SPI connection, connect the AD7797BRUZ's serial clock (SCLK), master-out slave-in (MOSI), and master-in slave-out (MISO) pins to the equivalent pins of a microcontroller. To allow communication with the ADC, the microcontroller's GPIO pin must also be linked to the chip select (CS) pin.

5. Filtering: To remove high-frequency noise, insert a low-pass filter in between the RTD sensor and the ADC input. If the resistor and capacitor are set appropriately, this may be a straightforward RC filter.

6. Calibration: Implement a calibration procedure in the microcontroller's firmware to compensate for any offsets or errors in the ADC readings. This ensures accurate temperature measurements.

Design Considerations:

1. Noise Reduction: Careful layout and shielding techniques should be used to minimize noise in the analog signal path.

2. Temperature Drift: Consider the temperature coefficient of the reference voltage and other components to minimize temperature-induced errors.

3. Sensor Excitation: Ensure that the excitation current for the RTD sensor is stable and accurate, as variations can affect the measurement accuracy.

By following these design guidelines and using the AD7797BRUZ ADC, a high-precision temperature measurement system can be implemented.

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6. What is the process for return or replacement of AD7797BRUZ?

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 AD7797BRUZ we delivered, we will accept the replacement or return of the AD7797BRUZ 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 AD7797BRUZ.

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

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(1)Inform us within 90 days

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