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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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AD7665AST Datenblatt(PDF) 1 Page - Analog Devices |
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AD7665AST Datenblatt(HTML) 1 Page - Analog Devices |
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1 / 24 page  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. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD7665* 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., 2001 16-Bit, 570 kSPS CMOS ADC FUNCTIONAL BLOCK DIAGRAM DGND DVDD AVDD AGND REF REFGND SWITCHED CAP DAC CNVST IMPULSE WARP OGND 16 CONTROL LOGIC AND CALIBRATION CIRCUITRY CLOCK IND(4R) 4R OVDD AD7665 INGND PD RESET BYTESWAP SER/ PAR DATA[15:0] BUSY CS RD OB/ 2C SERIAL PORT PARALLEL INTERFACE INA(R) R INC(4R) 4R INB(2R) 2R FEATURES Throughput: 570 kSPS (Warp Mode) 500 kSPS (Normal Mode) INL: 2.5 LSB Max ( 0.0038% of Full Scale) 16-Bit Resolution with No Missing Codes S/(N+D): 90 dB Typ @ 180 kHz THD: –100 dB Typ @ 180 kHz Analog Input Voltage Ranges: Bipolar: 10 V, 5 V, 2.5 V Unipolar: 0 V to 10 V, 0 V to 5 V, 0 V to 2.5 V Both AC and DC Specifications No Pipeline Delay Parallel (8/16 Bits) and Serial 5 V/3 V Interface Single 5 V Supply Operation Power Dissipation 64 mW Typical 15 W @ 100 SPS Power-Down Mode: 7 W Max Package: 48-Lead Quad Flatpack (LQFP) Pin-to-Pin Compatible Upgrade of the AD7664/AD7663 APPLICATIONS Data Acquisition Communication Instrumentation Spectrum Analysis Medical Instruments Process Control GENERAL DESCRIPTION The AD7665 is a 16-bit, 570 kSPS, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. It contains a high-speed 16-bit sampling ADC, a resistor input scaler which allows various input ranges, an internal con- version clock, error correction circuits, and both serial and parallel system interface ports. The AD7665 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 features a very high sampling rate mode (Warp) and, for asynchronous conversion rate applications, a fast mode (Nor- mal) and, for low power applications, a reduced power mode (Impulse) where the power is scaled with the throughput. It is fabricated using Analog Devices’ high-performance, 0.6 micron CMOS process and is available in a 48-lead LQFP with opera- tion specified from –40 °C to +85°C. *Patent pending. PRODUCT HIGHLIGHTS 1. Fast Throughput The AD7665 is a very high speed (570 kSPS in Warp mode and 500 kSPS in Normal mode), charge redistribution, 16-bit SAR ADC. 2. Single Supply Operation The AD7665 operates from a single 5 V supply, dissipates only 64 mW typical, even lower when a reduced throughput is used with the reduced power mode (Impulse) and a power- down mode. 3. Superior INL The AD7665 has a maximum integral nonlinearity of 2.5 LSB with no missing 16-bit code. 4. Serial or Parallel Interface Versatile parallel (8 or 16 bits) or 2-wire serial interface arrangement compatible with both 3 V or 5 V logic. |
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