Overview
The ADS131A04IPBS is a 4-channel, simultaneous-sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS131A04 series, which includes both 2-channel and 4-channel variants. The ADS131A04 is designed for high-performance applications, particularly in energy monitoring, grid protection, and control systems. It features a wide dynamic range and scalable data rates up to 128 kSPS, making it suitable for various industrial and power monitoring tasks.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 4 (simultaneous-sampling differential inputs) |
| Resolution | 24 bits |
| Data Rates | 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 | Using negative charge pump: 3.0 V to 3.45 V, Unipolar supply: 3.3 V to 5.5 V, Bipolar supply: ±2.5 V |
| Digital Power Supply | 1.65 V to 3.6 V |
| Internal Voltage Reference | Low-drift, 6 ppm/°C |
| Operating Temperature Range | –40°C to +125°C |
| Package | 32-pin TQFP (5x5) |
Key Features
- High performance with single-channel accuracy better than 0.1% at 10,000:1 dynamic range
- Integrated negative charge pump allows absolute input voltages below ground
- Flexible analog power-supply operation with various supply options
- Low-drift internal voltage reference: 6 ppm/°C
- 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
- ADC inputs can be independently and directly interfaced to a resistor-divider network, a current transformer, or a Rogowski coil
Applications
The ADS131A04IPBS is particularly suited for energy monitoring, grid protection, and control applications. Its high dynamic range and scalable data rates make it ideal for measuring voltage or current in various industrial settings. It can be used in systems that require precise and reliable analog-to-digital conversion, such as smart grid systems, power quality monitoring, and industrial automation.
Q & A
- What is the resolution of the ADS131A04IPBS?
The ADS131A04IPBS has a resolution of 24 bits.
- What are the data rates supported by the ADS131A04IPBS?
The data rates supported by the ADS131A04IPBS are up to 128 kSPS.
- What is the operating temperature range of the ADS131A04IPBS?
The operating temperature range is –40°C to +125°C.
- What types of power supplies can the ADS131A04IPBS use?
The device can use a negative charge pump (3.0 V to 3.45 V), unipolar supply (3.3 V to 5.5 V), bipolar supply (±2.5 V), and digital supply (1.65 V to 3.6 V).
- What interface modes are available for the ADS131A04IPBS?
The device supports asynchronous interrupt, synchronous master, and synchronous slave SPI data interface modes.
- How does the ADS131A04IPBS ensure data integrity?
The device includes cyclic redundancy check (CRC) and Hamming code error correction on communications.
- What is the package type of the ADS131A04IPBS?
The package type is a 32-pin TQFP (5x5).
- Can the ADS131A04IPBS measure voltages below ground?
Yes, the integrated negative charge pump allows the device to measure absolute input voltages below ground.
- What are some typical applications of the ADS131A04IPBS?
Typical applications include energy monitoring, grid protection, and control systems, as well as power quality monitoring and industrial automation.
- How accurate is the single-channel accuracy of the ADS131A04IPBS?
The single-channel accuracy is better than 0.1% at a 10,000:1 dynamic range.
