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ADS1120IRVAT bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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ADS1120IRVAT bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 60 page Low Drift Oscillator Reference Mux Precision Temp Sensor AIN0/REFP1 AIN1 AIN2 AIN3/REFN1 SCLK CS AVDD AVSS DOUT/DRDY DIN ADS1120 DRDY DGND REFP0 REFN0 Internal Reference CLK 50 A to 1.5 mA Mux DVDD PGA 16-bit ûADC Digital Filter and SPI Interface ADS1120 www.ti.com SBAS535A – AUGUST 2013 – REVISED JANUARY 2014 Low-Power, Low-Noise, 16-Bit, Analog-to-Digital Converter for Small-Signal Sensors Check for Samples: ADS1120 1 FEATURES DESCRIPTION The ADS1120 is a precision, 16-bit, analog-to-digital 23 • Low Current Consumption: converter (ADC) that offers many integrated features As Low as 120 μA (typ) in Duty-Cycle Mode to reduce system cost and component count in • Wide Supply Range: 2.3 V to 5.5 V applications measuring small sensor signals. The • Programmable Gain: 1 V/V to 128 V/V device features two differential or four single-ended inputs through a flexible input multiplexer (mux), a • Programmable Data Rates: Up to 2 kSPS low-noise, programmable gain amplifier (PGA), two • 16-Bit Noise-Free Resolution at 20 SPS programmable excitation current sources, a voltage • Simultaneous 50-Hz and 60-Hz Rejection at reference, an oscillator, a low-side switch, and a 20 SPS with Single-Cycle Settling Digital Filter precision temperature sensor. • Dual-Matched Programmable Current Sources: The device can perform conversions at data rates up 50 μA to 1500 μA to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift simultaneous 50-Hz and 60-Hz rejection for noisy • Internal 2% Accurate Oscillator industrial applications. The internal PGA offers gains • Internal Temperature Sensor: up to 128 V/V. This PGA makes the ADS1120 ideally- 0.5°C (typ) Accuracy suited for applications measuring small sensor signals, such as resistance temperature detectors • Two Differential or Four Single-Ended Inputs (RTDs), thermocouples, thermistors, and bridge • SPI™-Compatible Interface sensors. The device supports measurements of • Package: 3,5-mm × 3,5-mm × 0,9-mm QFN pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to APPLICATIONS bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for • Temperature Sensors: single-ended measurements. – Thermocouples The power consumption is as low as 120 µA when – Resistance Temperature Detectors (RTDs) operating in duty-cycle mode with the PGA disabled. 2-, 3-, or 4-Wire Types Communication to the device is established through a • Bridge Sensors mode 1 SPI-compatible interface. The ADS1120 is offered in a leadless QFN-16 or a TSSOP-16 • Portable Instrumentation package and is specified over a temperature range of • Factory Automation and Process Controls –40°C to +125°C. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 SPI is a trademark of Motorola, Inc. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2013–2014, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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