Overview
The ADS131A02IPBS is a 2-channel, simultaneous-sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS131A02 and ADS131A04 family, which are designed for high-performance applications requiring precise analog-to-digital conversion. The ADS131A02IPBS features a wide dynamic range and scalable data rates up to 128 kSPS, making it an excellent choice for energy monitoring, grid protection, and control applications.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 2 |
| Resolution | 24-bit |
| Data Rate | Up to 128 kSPS |
| Effective Resolution | 20.6 bits at 8 kSPS |
| Total Harmonic Distortion (THD) | –100 dB at 50 Hz and 60 Hz |
| Analog Power Supply | 3.0 V to 3.45 V (with negative charge pump), 3.3 V to 5.5 V (unipolar), ±2.5 V (bipolar) |
| Digital Power Supply | 1.65 V to 3.6 V |
| Internal Voltage Reference Drift | 6 ppm/°C |
| Operating Temperature Range | –40°C to +125°C |
| Package Type | 32-pin TQFP |
Key Features
- Simultaneous-sampling differential inputs
- High performance with single-channel accuracy better than 0.1% at 10,000:1 dynamic range
- Integrated negative charge pump for absolute input voltages below ground
- Flexible analog power-supply operation
- Low-drift internal voltage reference
- ADC self-checks and cyclic redundancy check (CRC) and hamming code error correction on communications
- Multiple SPI data interface modes: asynchronous interrupt, synchronous master and slave
- Interface checks, ADC startup checks, and data integrity checks
Applications
The ADS131A02IPBS is particularly suited for applications in energy monitoring, grid protection, and control. It can be used to measure voltage or current by interfacing the ADC inputs directly to a resistor-divider network, a current transformer, or a Rogowski coil. The device's high dynamic range and flexible power-supply options make it ideal for various industrial and power monitoring systems.
Q & A
- What is the resolution of the ADS131A02IPBS?
The ADS131A02IPBS has a 24-bit resolution. - What are the data rates supported by the ADS131A02IPBS?
The device supports data rates up to 128 kSPS. - What is the effective resolution of the ADS131A02IPBS at 8 kSPS?
The effective resolution is 20.6 bits at 8 kSPS. - What is the total harmonic distortion (THD) of the ADS131A02IPBS?
The THD is –100 dB at 50 Hz and 60 Hz. - What are the power supply options for the ADS131A02IPBS?
The device supports analog power supply options including 3.0 V to 3.45 V (with negative charge pump), 3.3 V to 5.5 V (unipolar), and ±2.5 V (bipolar), and digital power supply from 1.65 V to 3.6 V. - What is the operating temperature range of the ADS131A02IPBS?
The operating temperature range is –40°C to +125°C. - What package type is the ADS131A02IPBS available in?
The device is available in a 32-pin TQFP package. - Can the ADS131A02IPBS handle absolute input voltages below ground?
Yes, the integrated negative charge pump allows for absolute input voltages below ground. - What interface modes are supported by the ADS131A02IPBS?
The device supports multiple SPI data interface modes including asynchronous interrupt, synchronous master, and synchronous slave. - Does the ADS131A02IPBS have built-in error correction mechanisms?
Yes, it includes cyclic redundancy check (CRC) and hamming code error correction on communications.
