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Name: AD7779ACPZ
Brand: Analog Devices Inc.
SKU: AD7779ACPZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Analog Devices Inc. AD7779ACPZ

Part No.:: AD7779ACPZ

Manufacturer:: Analog Devices Inc.

Package:: 64-WFQFN Exposed Pad, CSP

Datasheet:: AD7779ACPZ.pdf

Description:: IC ADC 24BIT SIGMA-DELTA 64LFCSP

In Stock:: 2418

Quantity:: Add To Cart

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AD7779ACPZ Specifications

Packaging:
Bulk,Tray
Series:
-
Product Status:
Active
Number of Bits:
24
Sampling Rate(PerSecond):
16k
Number of Inputs:
8
Input Type:
Differential, Single Ended
Data Interface:
Serial
Configuration:
PGA-ADC
Ratio-S/H:ADC:
1:1
Number of A/D Converters:
8
Architecture:
Sigma-Delta
Reference Type:
External, Internal
Voltage-Supply Analog:
±1.65V, 2.2V ~ 3.6V
Voltage-Supply Digital:
-
Features:
Simultaneous Sampling
Operating Temperature:
-40°C ~ 125°C

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AD7779ACPZ information

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AD7779ACPZ Typical application Circuitry

AD7779ACPZ

The AD7779ACPZ is a high-performance, 24-bit, 8-channel sigma-delta ADC designed for precision data acquisition systems. This ADC is well-suited for applications requiring high accuracy and multiple input channels, such as medical instrumentation, industrial process control, and multi-sensor monitoring systems.

Key Functions: The AD7779ACPZ offers eight independent input channels, each capable of operating in both single-ended and differential modes. It provides a wide dynamic range, low noise, and high accuracy, making it ideal for capturing and converting small signal amplitudes in noisy environments.

Application Scenarios: This ADC is commonly used in medical instrumentation such as electroencephalography (EEG) machines, industrial process control systems that monitor multiple sensors simultaneously, and multi-sensor monitoring systems in environmental and scientific research.

Parameter Features: The AD7779ACPZ boasts a maximum output data rate of 32 kSPS per channel, enabling high-speed data acquisition. It also features an integrated low-noise reference and programmable gain amplifiers, allowing for flexible signal conditioning.

Circuit Design for Medical Instrumentation:

1. Power Supply Connection: Connect a stable +5V power supply to the AVDD and DVDD pins (pins 5 and 6) of the AD7779ACPZ to ensure optimal performance.

2. Reference Voltage Setup: Connect a precision 2.5V reference voltage to the REF+ pin (pin 14) and ground the REF- pin (pin 15) to set the ADC's full-scale range accurately.

3. Input Channel Configuration: For EEG monitoring, connect the differential EEG sensor outputs to the AIN+ and AIN- pins (pins 16-23 and 24-31) of the AD7779ACPZ. This configuration allows for simultaneous monitoring of multiple EEG channels.

4. Digital Interface: Interface the AD7779ACPZ with a microcontroller or FPGA using the SPI protocol. Connect the SCLK (pin 2), SDI (pin 3), SDO (pin 4), and CS (pin 1) pins to the corresponding pins on the microcontroller/FPGA.

5. Clock Source: To find the sampling rate of the ADC, supply a steady clock source to pin 33, the MCLK pin. The required filtering and desired data rate should be taken into consideration while selecting the clock frequency.

6. Filter Selection: Program the digital filter settings in the AD7779ACPZ to optimize performance for the EEG signal bandwidth and noise levels. The ADC offers various filter options to suit different application needs.

7. Data Acquisition: Develop firmware for the microcontroller/FPGA to initiate conversions, read data from the AD7779ACPZ, and process the acquired EEG signals for medical analysis.

Design Considerations: When designing the circuit, it is crucial to minimize noise and maintain signal integrity. Use a dedicated ground plane for the analog section, keep analog signal traces short and shielded, and place decoupling capacitors close to the power supply pins. Additionally, consider the isolation and protection of sensitive EEG signals from electrical interference.

In summary, the AD7779ACPZ ADC is a versatile and precise component suitable for applications requiring high-accuracy measurements across multiple channels. By following the detailed circuit design guidelines, this ADC can be effectively utilized in medical instrumentation, such as EEG monitoring systems, to ensure reliable and accurate data acquisition.

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6. What is the process for return or replacement of AD7779ACPZ?

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 AD7779ACPZ we delivered, we will accept the replacement or return of the AD7779ACPZ 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 AD7779ACPZ.

(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