Overview
The AD7124-8BBCPZ-RL is a highly integrated, low power, and low noise analog-to-digital converter (ADC) produced by Analog Devices Inc. This 24-bit Sigma-Delta ADC is designed for high precision measurement applications and offers a high degree of signal chain integration. The device features 8 differential or 15 single-ended/pseudo differential inputs, making it versatile for various measurement scenarios. It is particularly suited for applications requiring low noise and high accuracy, such as industrial automation, medical devices, and automotive systems.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 24 bits |
| Number of Channels | 8 differential or 15 single-ended/pseudo differential |
| Power Modes | Low, Mid, Full Power |
| Analog Supply Voltage | 2.7 V to 3.6 V (single supply) or 1.8 V (dual supply) |
| Digital Supply Voltage | 1.65 V to 3.6 V |
| Operating Temperature Range | -40°C to +125°C |
| Package Type | 32-Lead LFCSP (5mm x 5mm x 0.95mm) |
| Maximum Output Data Rate | Up to 19.2 kHz |
| RMS Noise (Low Power Mode) | 24 nV rms at 1.17 SPS, gain = 128 |
| Internal Reference Accuracy | ±0.2% at 25°C |
Key Features
- Flexible Power Modes: The AD7124-8 offers three integrated power modes (low, mid, full power) allowing users to tailor current consumption, output data rates, and rms noise according to their application needs.
- High Signal Chain Integration: Includes a precision, low noise, low drift internal band gap reference, programmable low drift excitation current sources, burnout currents, and a bias voltage generator.
- Simultaneous 50 Hz and 60 Hz Rejection: Achieves rejection in excess of 80 dB at lower output data rates, ensuring high accuracy in noisy environments.
- Integrated Channel Sequencer: Allows several channels to be enabled simultaneously, simplifying communication with the device and enabling diagnostics to be interleaved with conversions.
- Low-Side Power Switch: Enables power-down of bridge sensors between conversions, minimizing power consumption.
- External and Internal Clock Options: Users can operate the device with either an internal or external clock.
Applications
- Industrial Automation: Suitable for precision measurement in industrial control systems and process automation.
- Medical Devices: Ideal for high accuracy and low noise requirements in medical equipment such as patient monitoring systems.
- Automotive Systems: The W grade of the AD7124-8 is AEC-Q100 qualified, making it suitable for automotive applications.
- Test and Measurement Equipment: Used in various test and measurement instruments requiring high precision and low noise.
Q & A
- Q: What is the resolution of the AD7124-8 ADC?
A: The AD7124-8 is a 24-bit Sigma-Delta ADC.
- Q: How many channels does the AD7124-8 support?
A: The device supports 8 differential or 15 single-ended/pseudo differential inputs.
- Q: What are the power modes available on the AD7124-8?
A: The AD7124-8 offers three power modes: low, mid, and full power.
- Q: What is the operating temperature range of the AD7124-8?
A: The device operates from -40°C to +125°C.
- Q: Can the AD7124-8 reject 50 Hz and 60 Hz noise simultaneously?
A: Yes, it can achieve simultaneous 50 Hz and 60 Hz rejection with rejection in excess of 80 dB at lower output data rates.
- Q: What is the maximum output data rate of the AD7124-8?
A: The maximum output data rate is up to 19.2 kHz.
- Q: Does the AD7124-8 support external and internal clock options?
A: Yes, users can operate the device with either an internal or external clock.
- Q: What is the purpose of the low-side power switch in the AD7124-8?
A: The low-side power switch enables the power-down of bridge sensors between conversions, ensuring minimal power consumption.
- Q: What diagnostics are available on the AD7124-8?
A: The device includes on-chip diagnostics to verify circuit connections, check internal blocks like PGA, reference, and ADC, and monitor serial interface integrity.
- Q: Is the AD7124-8 suitable for automotive applications?
A: Yes, the W grade of the AD7124-8 is AEC-Q100 qualified for automotive applications.
