The ADS131A02 and ADS131A04 are two- and four-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converters (ADCs). The wide dynamic range, scalable data rates, and internal fault monitors make the ADS131A02 and ADS131A04 ideally-suited for energy monitoring, protection, and control applications. The ADC inputs can be independently and directly interfaced to a resistor-divider network, a transformer to measure voltage or current, or a Rogowski coil to measure current. Flexible power-supply options, including an internal negative charge pump, are available to maximize the effective resolution for high dynamic range applications.
●Asynchronous and synchronous master and slave interface options are available, providing ADC configuration flexibility when chaining multiple devices in a single system. Several interface checks, ADC startup checks, and data integrity checks can be enabled on the interface to report errors in the ADC and during data transfer.
●The ADS131A02 and ADS131A04 support data rates up to 128 kSPS. The complete analog front-end (AFE) solutions are packaged in a 32-pin TQFP package and are specified over the industrial temperature range of –40°C to +125°C.
● 2 or 4 Simultaneously-Sampling Differential Inputs
● Data Rates Up to 128 kSPS
● Noise Performance:
● Single-Channel Accuracy: Better Than 0.1% at 10,000:1 Dynamic Range
● Effective Resolution: 19.1 Bits at 8 kSPS
● THD: –100 dB at 50 Hz and 60 Hz
● Integrated Negative Charge Pump
● Flexible Analog Power-Supply Operation:
● 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 Supply: 1.65 V to 3.6 V
● Low-Drift Internal Voltage Reference: 4 ppm/°C
● ADC Self Checks
● Cyclic Redundancy Check (CRC) and Hamming Code Error Correction on Communications
● Multiple SPI™ Data Interface Modes:
● Asynchronous Interrupt
● Synchronous Master and Slave
● Package: 32-Pin TQFP
● Operating Temperature Range:
●–40°C to +125°C
