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ADS1259 Arkusz danych(PDF) 1 Page - Texas Instruments |
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ADS1259 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 49 page Programmable DigitalFilter 2.5V Reference DS Modulator VREFP VREFN REFOUT AVDD DVDD DGND AVSS AINP AINN XTAL2 XTAL1/CLKIN Control and Serial Interface Clock Generator Out-of-Range Detection RESETPWDN / DRDY SCLK DIN START CS DOUT Calibration Engine f /8 CLK SYNCOUT ADS1259 ADS1259 www.ti.com SBAS424C – JUNE 2009 – REVISED MARCH 2010 Industrial, 14kSPS, 24-Bit Analog-to-Digital Converter with Low-Drift Reference Check for Samples: ADS1259 1 FEATURES DESCRIPTION 23 • 24 Bits, No Missing Codes The ADS1259 is a high-linearity, low-drift, 24-bit, analog-to-digital converter (ADC) designed for the • Output Data Rates From 10 To 14kSPS needs of industrial process control, precision • High Performance: instrumentation, and other exacting applications. – INL: 0.4ppm Combined with a signal amplifier (such as the – Reference Drift: 2ppm/°C PGA280), a high-resolution, high-accuracy measurement system is formed that is capable of – Gain Drift: 0.5ppm/°C digitizing a wide range of signals. – Offset Drift: 0.05mV/°C The converter uses a fourth-order, inherently stable, – Noise: 0.7mVRMS at 60SPS delta-sigma ( ΔΣ) modulator that provides outstanding • Simultaneous 50/60Hz Rejection at 10SPS noise and linearity performance. The data rates are • Single-Cycle Settling programmable up to 14kSPS including 10SPS, 50SPS, and 60SPS that provide excellent normal • Internal Oscillator mode line-cycle rejection. The digital filter can be • Out-of-Range Detection programmed for a fast settling mode where the • Readback Data Integrity by Checksum and conversions settle in a single cycle, or programmed for a high line-cycle rejection mode. A fast responding Redundant Data Read Capability input over-range detector flags the conversion data if • SPI™-Compatible Interface an input over-range should occur. • Analog Supply: +5V or ±2.5V The ADS1259 also provides an integrated low-noise, • Digital Supply: +2.7V to +5V very low drift 2.5V reference. The on-chip oscillator, • Low Power: 13mW an external crystal, or an external clock can by used as the ADC clock source. APPLICATIONS Data and control communication are handled over a • Industrial Process Control 4MHz, SPI-compatible interface capable of operating • Scientific Instrumentation with a minimum of three wires. Data integrity is • Test and Measurement augmented by data bytes checksum and redundant data read capability. Conversions are synchronized either by command or by pin. Dissipating only 13mW in operation, the ADS1259 can be powered down, dissipating less than 25mW. The ADS1259 is offered in a TSSOP-20 package and is fully specified from –40°C to +105°C. RELATED PRODUCTS FEATURES PRODUCT 24-bit ADC with integrated PGA ADS1256 Wide-range PGA PGA280 High-precision PGA; G = 1, 10, 100, 1000 PGA204 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. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2009–2010, 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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