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ADS131A02 Datasheet(PDF) 1 Page - Texas Instruments |
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ADS131A02 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 85 page SCLK DOUT DIN Control and Serial Interface GND AVSS DRDY AVDD VNCP XTAL1/CLKIN CS Negative Charge Pump Voltage Reference Reference Mux REFEXT IOVDD CLK/XTAL XTAL2 M[2:0] RESET DONE '6 ADC '6 ADC '6 ADC '6 ADC AIN4N AIN4P AIN3N AIN3P AIN2N AIN2P AIN1N AIN1P REFN REFP Out-of-Range Detect Data Integrity Watchdog Timer Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. ADS131A02, ADS131A04 SBAS590A – MARCH 2016 – REVISED MARCH 2016 ADS131A0x 2- or 4-Channel, 24-Bit, Analog Front-Ends for Power Monitoring, Control, and Protection 1 1 Features 1 • 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 – ENOB: 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 2 Applications • Industrial Power Applications • Single-Phase and Polyphase Energy Monitoring • Protection Relays, Circuit Breakers • Power Quality Meters • Data Acquisition Systems 3 Description 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 number of bits (ENOB) 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. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) ADS131A0x TQFP (32) 5.00 mm × 5.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Block Diagram |
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