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PADS122U04IPWR Datasheet(PDF) 1 Page - Texas Instruments |
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PADS122U04IPWR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 67 page  3.3 V 3.3 V Thermocouple 0.1 F 3.3 V 0.1 F Reference Mux Precision Temperature Sensor AIN0 AIN1 AIN2 AIN3 RX TX AVDD AVSS GPIO1 GPIO0 ADS122U04 DGND REFP REFN 2.048-V Reference 10 A to 1.5 mA Mux DVDD PGA 24-Bit û ADC Digital Filter and UART Interface Low Drift Oscillator GPIO2/ RESET DRDY Copyright © 2017, Texas Instruments Incorporated Product Folder Order Now 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. ADVANCE INFORMATION for pre-production products; subject to change without notice. ADS122U04 SBAS752 – MAY 2017 ADS122U04 24-Bit, 4-Channel, 2-kSPS, Delta-Sigma ADC With UART Interface 1 1 Features 1 • Current Consumption as Low as 315 μA (typ) • Wide Supply Range: 2.3 V to 5.5 V • Programmable Gain: 1 to 128 • Programmable Data Rates: Up to 2 kSPS • Up to 20-Bits Effective Resolution • Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS with Single-Cycle Settling Digital Filter • Two Differential or Four Single-Ended Inputs • Dual-Matched Programmable Current Sources: 10 μA to 1.5 mA • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift • Internal 2% Accurate Oscillator • Internal Temperature Sensor: 0.5°C (typ) Accuracy • Three General-Purpose Inputs/Outputs • 2-Wire UART Compatible Interface (8-N-1 Format) With Baud Rates up to 120 kBaud and Auto- Baud-Rate Detection • Package: 3.0-mm × 3.0-mm × 0.75-mm WQFN 2 Applications • Temperature Sensor Measurements: – Thermistors – Thermocouples – Resistance Temperature Detectors (RTDs): 2-, 3-, or 4-Wire Types • Resistive Bridge Sensor Measurements: – Pressure Sensors – Strain Gauges – Weigh Scales 3 Description The ADS122U04 is a precision, 24-bit, analog-to- digital converter (ADC) that offers many integrated features to reduce system cost and component count in applications measuring small sensor signals. The device features two differential or four single-ended inputs through a flexible input multiplexer (MUX), a low-noise, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, and a precision temperature sensor. The device can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hz and 60-Hz rejection for noisy industrial applications. The internal PGA offers gains up to 128. This PGA makes the ADS122U04 ideally suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors. The ADS122U04 features a 2-wire, UART-compatible interface. In applications that require galvanic isolation this universal asynchronous receiver/transmitter (UART) interface minimizes the number of digital isolation channels, thus saving cost, board space, and power. The ADS122U04 is offered in a leadless 16-pin WQFN or a 16-pin TSSOP package and is specified over a temperature range of –40°C to +125°C. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) ADS122U04 WQFN (16) 3.00 mm × 3.00 mm TSSOP (16) 5.00 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. K-Type Thermocouple Measurement |
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