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AD7623 Datasheet(PDF) 1 Page - Analog Devices |
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AD7623 Datasheet(HTML) 1 Page - Analog Devices |
1 / 28 page 16-Bit, 1.33 MSPS PulSAR® ADC AD7623 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved. FEATURES Throughput: 1.33 MSPS 2.048 V internal reference Differential input range: ±VREF (VREF up to 2.5 V) INL: ±1 LSB typical 16-bit resolution with no missing codes SINAD: 88 dB typical @ 100 kHz THD: −97 dB typical @ 100 kHz No pipeline delay (SAR architecture) Parallel (16- or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible 2.5 V single-supply operation Power dissipation: 45 mW typical @ 1.33 MSPS 48-lead LQFP and LFCSP_VQ packages Speed upgrade of the AD7677 APPLICATIONS Medical instruments High speed data acquisition Digital signal processing Communications Instrumentation Spectrum analysis ATE FUNCTIONAL BLOCK DIAGRAM 16 CONTROL LOGIC AND CALIBRATION CIRCUITRY CLOCK AD7623 DGND DVDD AVDD AGND REF REFGND IN+ IN– PD RESET CNVST PDBUF REFBUFIN PDREF REF TEMP D[15:0] BUSY RD CS OB/2C OGND OVDD BYTESWAP SER/PAR REF AMP SERIAL PORT PARALLEL INTERFACE SWITCHED CAP DAC Figure 1. Table 1. PulSAR Selection Type/kSPS 100 to 250 500 to 570 800 to 1000 >1000 Pseudo Differential AD7651 AD7660/61 AD7650/52 AD7664/66 AD7653 AD7667 True Bipolar AD7663 AD7665 AD7671 True Differential AD7675 AD7676 AD7677 AD7621 AD7623 18-Bit AD7678 AD7679 AD7674 AD7641 Multichannel/ Simultaneous AD7654 AD7655 GENERAL DESCRIPTION The AD7623 is a 16-bit, 1.33 MSPS, charge redistribution SAR, fully differential analog-to-digital converter (ADC) that operates from a single 2.5 V power supply. It contains a high speed 16-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. Power consump- tion is automatically scaled with throughput, making it ideal for battery-powered applications. It is available in 48-lead, low profile quad flat package (LQFP) and a lead frame chip-scale (LFCSP_VQ) package. Operation is specified from −40°C to +85°C. PRODUCT HIGHLIGHTS 1. Fast Throughput. The AD7623 is a 1.33 MSPS, charge redistribution, 16-bit SAR ADC. 2. Superior Linearity. The AD7623 has no missing 16-bit code. 3. Internal Reference. The AD7623 has a 2.048 V internal reference with a typical drift of ±7 ppm/°C. 4. Single-Supply Operation. The AD7623 operates from a 2.5 V single supply and typically dissipates 45 mW. Its power dissipation decreases with the throughput. 5. Serial or Parallel Interface. Versatile parallel (16- or 8-bit bus) or 2-wire serial interface arrangement compatible with 2.5 V, 3.3 V, or 5 V logic. |
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