AFE1124E/1K

Product Overview

Category: Analog Front-End (AFE) IC
Use: Signal conditioning and processing in medical applications
Characteristics: High precision, low power consumption, compact size
Package: QFN-32
Essence: Analog front-end for medical signal acquisition
Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Input Voltage Range: ±5V
• Supply Voltage: 2.7V to 5.5V
• Power Consumption: 3.5mW
• Resolution: 24 bits
• Sampling Rate: Up to 128 kSPS
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The AFE1124E/1K features a total of 32 pins. The pin configuration is as follows:

1. VDDA: Analog power supply
2. VDDD: Digital power supply
3. AVSS: Analog ground
4. DVSS: Digital ground
5. REFOUT: Reference voltage output
6. REFIN: Reference voltage input
7. CLK: Clock input
8. CS: Chip select input
9. DIN: Serial data input
10. DOUT: Serial data output
11. DRDY: Data ready output
12. RESET: Reset input 13-20. AIN0-AIN7: Analog input channels 21-28. AGND0-AGND7: Analog ground channels 29-32. NC: No connection

Functional Features

• Programmable gain amplifier (PGA)
• Low-pass filter (LPF)
• Digital-to-analog converter (DAC)
• Analog-to-digital converter (ADC)
• Integrated reference voltage source
• SPI interface for communication with microcontrollers

Advantages and Disadvantages

Advantages: - High precision signal conditioning - Low power consumption - Compact size for space-constrained applications - Wide operating temperature range

Disadvantages: - Limited number of analog input channels (8) - Requires external microcontroller for complete functionality

Working Principles

The AFE1124E/1K is designed to condition and process analog signals in medical applications. It utilizes a programmable gain amplifier (PGA) to amplify weak signals, followed by a low-pass filter (LPF) to remove unwanted noise. The digital-to-analog converter (DAC) converts the filtered signal back to analog form, which is then digitized by the integrated analog-to-digital converter (ADC). The resulting digital data can be accessed through the SPI interface.

Detailed Application Field Plans

The AFE1124E/1K is primarily used in medical devices that require precise signal acquisition and processing. Some specific application fields include:

1. Electrocardiography (ECG) monitors
2. Pulse oximeters
3. Blood pressure monitors
4. Electromyography (EMG) devices
5. Electroencephalography (EEG) systems

Detailed and Complete Alternative Models

1. AFE4400: Analog front-end for optical heart rate monitoring
2. ADS1299: Multi-channel analog front-end for bio-potential measurements
3. AD8232: Single-lead heart rate monitor front-end
4. MAX30003: Ultra-low power, single-channel bio-sensor front-end

These alternative models offer similar functionalities and can be considered as alternatives to the AFE1124E/1K depending on specific requirements.

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