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ADS1220IRVAT Arkusz danych(PDF) 1 Page - Texas Instruments |
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ADS1220IRVAT Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 71 page 3.3 V 3.3 V Thermocouple 0.1 2F 3.3 V 0.1 2F Low Drift Oscillator Reference Mux Precision Temp Sensor AIN0 AIN1 AIN2 AIN3 SCLK CS AVDD AVSS DOUT/DRDY DIN ADS1220 DRDY DGND REFP0 REFN0 Internal Reference CLK 10 A to 1.5 mA Mux DVDD PGA 24-bit ûADC Digital Filter and SPI Interface Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design ADS1220 SBAS501B – MAY 2013 – REVISED FEBRUARY 2015 ADS1220 Low-Power, Low-Noise, 24-Bit, ADC for Small-Signal Sensors 1 Features 3 Description The ADS1220 is a precision, 24-bit, analog-to-digital 1 • 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 • Up to 20-Bits Effective Resolution 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. • Two Differential or Four Single-Ended Inputs The device can perform conversions at data rates up • Dual Matched Programmable Current Sources: to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers 10 μA to 1.5 mA simultaneous 50-Hz and 60-Hz rejection for noisy • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift industrial applications. The internal PGA offers gains • Internal 2% Accurate Oscillator up to 128 V/V. This PGA makes the ADS1220 ideally- • Internal Temperature Sensor: suited for applications measuring small sensor signals, such as resistance temperature detectors 0.5°C (typ) Accuracy (RTDs), thermocouples, thermistors, and resistive • SPI™-Compatible Interface (Mode 1) bridge sensors. The device supports measurements • Package: 3.5-mm × 3.5-mm × 0.9-mm VQFN of pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to 2 Applications bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for • Temperature Sensor Measurements: single-ended measurements. – Thermistors Power consumption is as low as 120 µA when – Thermocouples operating in duty-cycle mode with the PGA disabled. – Resistance Temperature Detectors (RTDs): The ADS1220 is offered in a leadless VQFN-16 or a 2-, 3-, or 4-Wire Types TSSOP-16 package and is specified over a temperature range of –40°C to +125°C. • Resistive Bridge Sensor Measurements: – Pressure Sensors Device Information(1) – Strain Gauges PART NUMBER PACKAGE BODY SIZE (NOM) – Weigh Scales VQFN (16) 3.50 mm × 3.50 mm ADS1220 • Portable Instrumentation TSSOP (16) 5.00 mm × 4.40 mm • Factory Automation and Process Control (1) For all available packages, see the orderable addendum at the end of the data sheet. K-Type Thermocouple Measurement 1 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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA. |
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