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AD7674 Arkusz danych(PDF) 1 Page - Analog Devices |
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AD7674 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 20 page REV. B 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. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD7676 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2002 16-Bit, 1 LSB INL, 500 kSPS, Differential ADC FUNCTIONAL BLOCK DIAGRAM CONTROL LOGIC AND CALIBRATION CIRCUITRY CLOCK OB/ 2C 16 D[15:0] BUSY CS SER/ PAR OGND OVDD DGND DVDD SERIAL PORT PARALLEL INTERFACE BYTESWAP RD AVDD AGND REF REFGND PD RESET CNVST IN– SWITCHED CAP DAC AD7676 IN+ Table I. PulSAR Selection Type/kSPS 100–250 500–570 800–1000 Pseudo Differential AD7660 AD7650 AD7664 True Bipolar AD7663 AD7665 AD7671 True Differential AD7675 AD7676 AD7677 18-Bit AD7678 AD7679 AD7674 Simultaneous/ AD7654 Multichannel FEATURES Throughput: 500 kSPS INL: 1 LSB Max ( 0.0015% of Full Scale) 16-Bit Resolution with No Missing Codes S/(N+D): 94 dB Typ @ 45 kHz THD: –110 dB Typ @ 45 kHz Differential Input Range: 2.5 V Both AC and DC Specifications No Pipeline Delay Parallel (8 Bits/16 Bits) and Serial 5 V/3 V Interface SPI™/QSPI™/MICROWIRE™/DSP Compatible Single 5 V Supply Operation 67 mW Typical Power Dissipation, 15 W @ 100 SPS Power-Down Mode: 7 W Max Packages: 48-Lead Quad Flatpack (LQFP) 48-Lead Frame Chip Scale (LFCSP) Pin-to-Pin Compatible with the AD7675 APPLICATIONS CT Scanners Data Acquisition Instrumentation Spectrum Analysis Medical Instruments Battery-Powered Systems Process Control GENERAL DESCRIPTION The AD7676 is a 16-bit, 500 kSPS, charge redistribution SAR, fully differential analog-to-digital converter (ADC) that oper- ates from a single 5 V power supply. The part contains a high speed 16-bit sampling ADC, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports. The AD7676 is hardware factory-calibrated and is comprehen- sively tested to ensure such ac parameters as signal-to-noise ratio (SNR) and total harmonic distortion (THD), in addition to the more traditional dc parameters of gain, offset, and linearity. It is fabricated using Analog Devices’ high performance, 0.6 micron CMOS process and is available in a 48-lead LQFP or a tiny 48-lead LFCSP with operation specified from –40 °C to +85°C. PRODUCT HIGHLIGHTS 1. Excellent INL The AD7676 has a maximum integral nonlinearity of 1.0 LSB with no missing 16-bit code. 2. Superior AC Performances The AD7676 has a minimum dynamic of 92 dB, 94 dB typical. 3. Fast Throughput The AD7676 is a 500 kSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. 4. Single-Supply Operation The AD7676 operates from a single 5 V supply and typically dissipates only 67 mW. It consumes 7 µW maximum when in power-down. 5. Serial or Parallel Interface Versatile parallel (8 bits or 16 bits) or 2-wire serial interface arrangement compatible with either 3 V or 5 V logic. SPI and QSPI are trademarks of Motorola, Inc. MIRCOWIRE is a trademark of National Semiconductor Corporation. |
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