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ADS1626IPAPR Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1626IPAPR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 37 page SBAS280E − JUNE 2003 − REVISED MAY 2007 18Bit, 1.25MSPS AnalogtoDigital Converter ADS1625 ADS1626 FEATURES D Data Rate: 1.25MSPS D Signal-to-Noise Ratio: 93dB D Total Harmonic Distortion: −101dB D Spurious-Free Dynamic Range: 103dB D Linear Phase with 615kHz Bandwidth D Passband Ripple: ±0.0025dB D Adjustable FIFO Output Buffer (ADS1626 only) D Selectable On-Chip Reference D Directly Connects to TMS320C6000 DSPs D Adjustable Power Dissipation: 150 to 515mW D Power Down Mode D Supplies: Analog +5V Digital +3V Digital I/O +2.7V to +5.25V APPLICATIONS D Scientific Instruments D Automated Test Equipment D Data Acquisition D Medical Imaging D Vibration Analysis DESCRIPTION The ADS1625 and ADS1626 are high-speed, high-precision, delta-sigma analog-to-digital converters (ADCs) with 18-bit resolution. The data rate is 1.25 mega samples per second (MSPS), the bandwidth (−3dB) is 615kHz, and passband ripple is less than ±0.0025dB (to 550kHz). Both devices offer the same outstanding performance at these speeds with a signal-to-noise ratio up to 93dB, total harmonic distortion down to −101dB, and a spurious-free dynamic range up to 103dB. The ADS1626 includes an adjustable first-in, first-out buffer (FIFO) for the output data. The input signal is measured against a voltage reference that can be generated on-chip or supplied externally. The digital output data are provided over a simple parallel interface that easily connects to digital signal processors (DSPs). An out-of-range monitor reports when the input range has been exceeded. The ADS1625/6 operate from a +5V analog supply (AVDD) and +3V digital supply (DVDD). The digital I/O supply (IOVDD) operates from +2.7 to +5.25V, enabling the digital interface to support a range of logic families. The analog power dissipation is set by an external resistor and can be reduced when operating at slower speeds. A power-down mode, activated by a digital I/O pin, shuts down all circuitry. The ADS1625/6 are offered in a TQFP-64 package using TI PowerPAD technology. The ADS1625 and ADS1626, along with their 16-bit, 5MSPS counterparts, the ADS1605 and ADS1606, are well-suited for the demanding measurement requirements of scientific instrumentation, automated test equipment, data acquisition, and medical imaging. REFEN Reference and Bias Circuits I/O Interface Digital Filter ∆Σ Modulator VREFP VREFN RBIAS VMID VCAP AVDD DVDD IOVDD DGND AGND AINP AINN PD CLK CS RESET RD DRDY DOUT[17:0] FIFO_LEV[2:0] OTR ADS1626 Only FIFO ADS1625 ADS1626 PowerPAD is a trademark of Texas Instruments. All other 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. www.ti.com Copyright 2003−2007, 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. |
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