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Analog Devices Inc. AD7887ARMZ-REEL

Part No.:: AD7887ARMZ-REEL

Manufacturer:: Analog Devices Inc.

Package:: 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

Datasheet:

Description:: IC ADC 12BIT SAR 8MSOP

In Stock:: 1938

Quantity:: Add To Cart

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AD7887ARMZ-REEL Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
Product Status:
Active
Number of Bits:
12
Sampling Rate(PerSecond):
125k
Number of Inputs:
1, 2
Input Type:
Single Ended
Data Interface:
SPI, DSP
Configuration:
MUX-S/H-ADC
Ratio-S/H:ADC:
1:1
Number of A/D Converters:
1
Architecture:
SAR
Reference Type:
External, Internal
Voltage-Supply Analog:
2.7V ~ 5.25V
Voltage-Supply Digital:
2.7V ~ 5.25V
Features:
-
Operating Temperature:
-40°C ~ 125°C

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AD7887ARMZ-REEL information

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AD7887ARMZ-REEL Typical application Circuitry

AD7887ARMZ-REEL

The AD7887ARMZ-REEL is a dual-channel, 12-bit analog-to-digital converter (ADC) with a serial interface, designed for applications requiring precise and simultaneous conversion of two analog signals to digital data. The "REEL" suffix indicates that the chip is provided in a reel package, suitable for automated assembly processes.

Application Scenarios:

1. Portable Medical Devices: Used in battery-powered medical devices for monitoring physiological signals such as heart rate and blood pressure.

2. Remote Sensing: Employed in remote sensing systems for environmental monitoring, such as soil moisture and temperature measurement.

3. Industrial Control Systems: Utilized in industrial automation for simultaneous sampling of two process variables, such as temperature and pressure.

Parameter Features:

1. Dual-Channel ADC: Provides two independent 12-bit ADC channels, enabling simultaneous sampling of two analog signals.

2. Low Power Consumption: Designed for efficient power usage, suitable for battery-powered and energy-sensitive applications.

3. Serial Interface: Features a serial interface (SPI or MICROWIRE) for communication with microcontrollers or digital processors, enabling compact system designs.

4. Wide Input Voltage Range: Supports a broad range of input voltages, providing flexibility in signal measurement and processing.

Circuit Design Example: Portable Medical Device for Heart Rate and Blood Pressure Monitoring

In this example, we'll design a circuit using the AD7887ARMZ-REEL for a portable medical device monitoring heart rate and blood pressure.

1. Analog Input Connection:

- Connect Sensors: Connect the output of a heart rate sensor to the IN1 pin and a blood pressure sensor to the IN2 pin of the AD7887ARMZ-REEL.

2. Reference Voltage Configuration:

- Set Input Voltage Range: Connect a stable reference voltage to the VREF pin to define the maximum input voltage range of the ADC, ensuring accurate signal measurement.

3. Power Supply Arrangement:

- Supply Power: Connect a battery to the VDD pin and a ground connection to the GND pin to power the AD7887ARMZ-REEL.

4. Digital Interface:

- Connect to Microcontroller: Interface the serial data output (SDO), serial clock (SCLK), and chip select (CS) pins of the AD7887ARMZ-REEL with a microcontroller or digital processor for data communication.

5. Clock Source:

- Provide Clock Signal: Connect a stable clock source to the SCLK pin to control the timing of the ADC conversions.

6. Start Conversion:

- Trigger Sampling: Connect a digital control signal from the microcontroller to the CONVST pin to initiate the conversion process.

Design Considerations:

1. Sensor Compatibility: Ensure that the sensors connected to the ADC are compatible with the input voltage range and provide signals within the ADC's measurement range.

2. Signal Integrity: Minimize noise and interference in the analog input signals to maintain the precision of the ADC conversions.

3. Power Efficiency: Optimize the power consumption of the system, especially for portable medical devices, to ensure long battery life.

4. Reference Voltage Stability: Use a precise and stable reference voltage source to set the input voltage range accurately, crucial for accurate signal measurement.

5. Data Communication: Ensure reliable communication between the AD7887ARMZ-REEL and the microcontroller, especially in portable devices where power fluctuations may occur.

By carefully implementing the AD7887ARMZ-REEL in your portable medical device circuit with these considerations, you can achieve precise and simultaneous measurement of heart rate and blood pressure with energy efficiency.

AD7887ARMZ-REEL FAQ

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6. What is the process for return or replacement of AD7887ARMZ-REEL?

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 AD7887ARMZ-REEL we delivered, we will accept the replacement or return of the AD7887ARMZ-REEL 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 AD7887ARMZ-REEL.

(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