ADS1293CISQX/NOPB

Product Overview

• Category: Integrated Circuit
• Use: Analog Front-End for Biopotential Measurements
• Characteristics:
  • High-resolution, low-power analog front-end
  • Designed for biopotential measurements such as ECG, EEG, and EMG
  • Provides high accuracy and noise performance
  • Supports simultaneous sampling of up to three biopotential channels
• Package: QFN (Quad Flat No-Lead)
• Essence: Analog front-end for biopotential measurements
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Resolution: 24 bits
• Input Voltage Range: ±4.5 mV to ±2.048 V
• Sampling Rate: Up to 32 kSPS (Samples per Second)
• Power Supply: 2.7 V to 5.25 V
• Operating Temperature Range: -40°C to +85°C
• Interface: SPI (Serial Peripheral Interface)

Detailed Pin Configuration

The ADS1293CISQX/NOPB has a total of 32 pins. The pin configuration is as follows:

1. AVDD: Analog power supply
2. DVDD: Digital power supply
3. AGND: Analog ground
4. DGND: Digital ground
5. CLK: Clock input
6. CS: Chip select input
7. DIN: Serial data input
8. DOUT: Serial data output
9. DRDY: Data ready output
10. RESET: Reset input
11. START: Start conversion input
12. PWDN: Power-down input
13. TEST: Test mode input
14. GPIO1: General-purpose input/output 1
15. GPIO2: General-purpose input/output 2
16. GPIO3: General-purpose input/output 3
17. GPIO4: General-purpose input/output 4 18-25. CH1P, CH1N, CH2P, CH2N, CH3P, CH3N: Biopotential channel inputs 26-32. NC: No connect pins

Functional Features

• High-resolution ADC for accurate biopotential measurements
• Low-power consumption for extended battery life
• Integrated lead-off detection for electrode status monitoring
• Built-in right-leg drive circuitry for common-mode noise rejection
• Flexible input multiplexer for channel selection
• Programmable gain amplifier for signal amplification
• On-chip reference voltage generator for precise measurements
• SPI interface for easy integration with microcontrollers

Advantages and Disadvantages

Advantages: - High resolution and accuracy for reliable biopotential measurements - Low power consumption for portable and battery-powered applications - Integrated lead-off detection enhances patient safety - Flexible input multiplexer allows for versatile channel configurations - On-chip reference voltage generator ensures precise measurements

Disadvantages: - Limited to three biopotential channels - Requires external microcontroller for data processing and analysis - Relatively small package size may require careful PCB layout design

Working Principles

The ADS1293CISQX/NOPB is an analog front-end designed for biopotential measurements. It utilizes a high-resolution ADC to convert the analog signals from biopotential electrodes into digital data. The integrated lead-off detection circuitry monitors the electrode connection status to ensure accurate measurements and patient safety.

The device features a flexible input multiplexer that allows the selection of up to three biopotential channels. A programmable gain amplifier amplifies the weak biopotential signals before digitization. The on-chip reference voltage generator provides a stable reference for precise measurements.

The ADS1293CISQX/NOPB communicates with an external microcontroller through the SPI interface, enabling seamless integration into various medical and healthcare applications.

Detailed Application Field Plans

The ADS1293CISQX/NOPB is widely used in the following application fields:

1. Electrocardiography (ECG) monitoring systems
2. Electroencephalography (EEG) devices for brain activity measurement
3. Electromyography (EMG) equipment for muscle activity analysis
4. Wearable health and fitness trackers
5. Portable medical devices for remote patient monitoring

Detailed and Complete Alternative Models

1. ADS1292R: Similar to ADS1293CISQX/NOPB but with two biopotential channels instead of three.
2. ADS1299: Offers eight biopotential channels for multi-channel measurements.
3. ADS1278: Provides high-resolution ADCs for general-purpose data acquisition applications.
4. ADS131A04: Designed specifically for industrial process control and automation systems.

These alternative models offer different channel configurations and features to cater to specific application requirements.

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