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ADS1222IPWRG4 bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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ADS1222IPWRG4 bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 27 page SBAS314B − APRIL 2004 − REVISED JANUARY 2009 24Bit AnalogtoDigital Converter with 2Channel Differential Input Multiplexer ADS1222 FEATURES D 240SPS Data Rate with 4MHz Clock D 20-Bit Effective Resolution D Input Multiplexer with Two Differential Channels D Pin-Selectable, High-Impedance Input Buffer D ±5V Differential Input Range D 0.0003% INL (typ), 0.0015% INL (max) D Self-Calibrating D Simple 2-Wire Serial Interface D On-Chip Temperature Sensor D Single Conversions with Standby Mode D Low Current Consumption: 300µA D Analog Supply: 2.7V to 5.5V APPLICATIONS D Hand-Held Instrumentation D Portable Medical Equipment D Industrial Process Control D Weigh Scales DESCRIPTION The ADS1222 is a 2-channel, 24-bit, delta-sigma ana- log-to-digital (A/D) converter. It offers excellent perfor- mance and low power in a TSSOP-14 package. The ADS1222 is well-suited for demanding, high-resolution measurements, especially in portable systems and oth- er space-saving and power-constrained applications. A delta-sigma ( ∆Σ) modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. An input multiplexer (MUX) is used to select between two separate differential input channels. A buffer can be selected to increase the input impedance of the measurement. A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Standby mode are handled with a few simple waveforms. When only single conversions are needed, the ADS1222 can be quickly shut down (Standby mode) while idle between measurements to dramatically reduce the overall power consumption. Multiple ADS1222s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1222 is designed to easily connect to microcontrollers, such as the MSP430. The ADS1222 supports 2.7V to 5.5V supplies. Power is typically less than 1mW in 3V operation and less than 1 µW during Standby mode. Mux Digital Filter and Serial Interface ∆Σ Modulator VREFP VREFN Buffer VDD GND MUX AINP1 AINN1 AINP2 AINN2 CLK DRDY/DOUT SCLK TEMPEN BUFEN www.ti.com www.ti.com Copyright 2004−2008, Texas Instruments Incorporated 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. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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Mô tả tương tự - ADS1222IPWRG4 |
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