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AD7667 Folha de dados(PDF) 1 Page - Analog Devices |
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AD7667 Folha de dados(HTML) 1 Page - Analog Devices |
1 / 28 page 16-Bit 1 MSPS PulSAR® Unipolar ADC with Reference AD7667 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: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES 2.5 V internal reference: typical drift 3 ppm/°C Guaranteed max drift 15 ppm/°C Throughput: 1 MSPS (Warp mode) 800 kSPS (Normal mode) 666 kSPS (Impulse mode) INL: ±2.0 LSB max (±0.0038% of full scale) 16-bit resolution with no missing codes S/(N+D): 88 dB min @ 20 kHz THD: –96 dB max @ 20 kHz Analog input voltage range: 0 V to 2.5 V No pipeline delay Parallel and serial 5 V/3 V interface SPI ®/QSPITM/MICROWIRETM/DSP compatible Single 5 V supply operation Power dissipation 87 mW typ @ 666 kSPS, 130 µW @ 1 kSPS without REF 133 mW typ @1 MSPS with REF 48-lead LQFP and 48-lead LFCSP packages Pin-to-pin compatible with AD7671, AD7677 APPLICATIONS Data acquisition Medical instruments Digital signal processing Battery-powered systems Process control GENERAL DESCRIPTION The AD7667 is a 16-bit, 1 MSPS, charge redistribution SAR analog-to-digital converter that operates from a single 5 V power supply. The part contains a high speed 16-bit sampling ADC, an internal conversion clock, internal reference, error correction circuits, and both serial and parallel system inter- face ports. It features a very high sampling rate mode (Warp), a fast mode (Normal) for asynchronous applications, and a reduced power mode (Impulse) for low power applications where power is scaled with the throughput. The AD7667 is hardware factory-calibrated and comprehensively tested to ensure ac parameters such as signal-to-noise ratio (SNR) and total harmonic distortion (THD) in addition to the more traditional dc parameters of gain, offset, and linearity. Operation is specified from –40°C to +85°C. FUNCTIONAL BLOCK DIAGRAM SWITCHED CAP DAC 16 CONTROL LOGIC AND CALIBRATION CIRCUITRY CLOCK AD7667 DATA[15:0] BUSY RD CS SER/PAR OB/2C OGND OVDD DGND DVDD AVDD AGND REF REFGND IN INGND PD RESET SERIAL PORT PARALLEL INTERFACE CNVST WARP IMPULSE REF REFBUFIN PDBUF PDREF BYTESWAP Figure 1. Table 1. PulSAR Selection Type/kSPS 100–250 500–570 800– 1000 Pseudo- Differential AD7651 AD7660/AD7661 AD7650/AD7652 AD7664/AD7666 AD7653 AD7667 True Bipolar AD7663 AD7665 AD7671 True Differential AD7675 AD7676 AD7677 18-Bit AD7678 AD7679 AD7674 Multichannel/ Simultaneous AD7654 AD7655 PRODUCT HIGHLIGHTS 1. Fast Throughput. The AD7667 is a 1 MSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. 2. Superior INL. The AD7667 has a maximum integral nonlinearity of 2.0 LSBs with no missing 16-bit codes. 3. Internal Reference. The AD7667 has an internal reference with a typical temperature drift of 3 ppm/°C. 4. Single-Supply Operation. The AD7667 operates from a single 5 V supply. In Impulse mode, its power dissipation decreases with throughput. 5. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangement is compatible with both 3 V and 5 V logic. |
Nº de peça semelhante - AD7667_15 |
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Descrição semelhante - AD7667_15 |
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