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Name: AD7195BCPZ
Brand: Analog Devices Inc.
SKU: AD7195BCPZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Analog Devices Inc. AD7195BCPZ

Part No.:: AD7195BCPZ

Manufacturer:: Analog Devices Inc.

Package:: 32-WFQFN Exposed Pad, CSP

Datasheet:

Description:: IC AFE 1 CHAN 24BIT 32LFCSP

In Stock:: 2060

Quantity:: Add To Cart

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AD7195BCPZ Typical application Circuitry

AD7195BCPZ

The AD7195BCPZ is a high-performance, low-noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA). It is designed for high-precision measurement applications.

Function: The AD7195BCPZ is primarily used for converting analog signals into high-resolution digital data. Its 24-bit Σ-Δ ADC and low-noise characteristics make it suitable for applications requiring accurate and stable measurements.

Application Scenarios: This chip is commonly employed in industrial and medical instrumentation, including weigh scales, pressure sensors, temperature monitoring systems, and electrochemical analysis.

Parameter Features: The AD7195BCPZ features a 24-bit resolution, a low noise PGA with gain settings from 1 to 128, a maximum output data rate of 4.8 kHz, and a power consumption of 4.65 mW at a 4.8 kHz output data rate.

Circuit Design for a Weigh Scale System:

1. Power Supply: Connect a stable +5V power supply to the AVDD and DVDD pins (pins 24 and 23, respectively) for analog and digital power. Use 10 µF and 0.1 µF capacitors for decoupling these pins to ensure a stable power supply.

2. Reference Voltage: Connect a 2.5V precision reference voltage to the REFIN+/REFIN- pins (pins 5 and 6) to set the full-scale range of the ADC.

3. Load Cell Connection: Connect the AD7195BCPZ positive and negative terminals of a load cell to the AIN1+ and AIN1- pins (pins 9 and 10) for differential input.

4. Clock Source: Connect an external 4.9152 MHz crystal oscillator between the MCLK1 and MCLK2 pins (pins 11 and 12) to provide a clock source for the ADC.

5. Digital Interface: Connect the SPI interface pins (CS, SCLK, DIN, and DOUT/RDY) to the microcontroller for data communication. CS is pin 22, SCLK is pin 2, DIN is pin 3, and DOUT/RDY is pin 4.

6. Configuration: Configure the ADC through the SPI interface to set the desired gain, channel, and filter settings for the weigh scale application.

7. Data Acquisition: Monitor the DOUT/RDY pin for data ready indication and read the 24-bit conversion result through the SPI interface.

Design Considerations:

- Ensure that the power supply and reference voltage are stable and free from noise to maintain the accuracy of the ADC.

- Implement proper filtering and shielding techniques to minimize noise and interference in the load cell signal.

- Calibrate the system to account for the non-linearity and temperature sensitivity of the load cell.

- Use error checking and handling mechanisms in the software to address communication errors or ADC overrange conditions.

By following these guidelines, a precise and reliable weigh scale system can be developed using the AD7195BCPZ ADC.

AD7195BCPZ information

AD7195BCPZ Specifications

Package/Case:
32-WFQFN Exposed Pad, CSP
Packaging:
Tray
Series:
-
ProductStatus:
Active
NumberofBits:
24
NumberofChannels:
1
Power(Watts):
-
Voltage-SupplyAnalog:
5V
Voltage-SupplyDigital:
2.7V ~ 5.25V
MountingType:
Surface Mount

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6. What is the process for return or replacement of AD7195BCPZ?

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 AD7195BCPZ we delivered, we will accept the replacement or return of the AD7195BCPZ 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 AD7195BCPZ.

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

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations