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AD7476ARTZ-REEL3 データシート(PDF) 1 Page - Analog Devices |
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AD7476ARTZ-REEL3 データシート(HTML) 1 Page - Analog Devices |
1 / 24 page 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SOT-23 AD7476/AD7477/AD7478 Rev. F Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. 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 ©2000–2009 Analog Devices, Inc. All rights reserved. FEATURES Fast throughput rate: 1 MSPS Specified for VDD of 2.35 V to 5.25 V Low power 3.6 mW at 1 MSPS with 3 V supplies 15 mW at 1 MSPS with 5 V supplies Wide input bandwidth 70 dB SNR at 100 kHz input frequency Flexible power/serial clock speed management No pipeline delays High speed serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible Standby mode: 1 μA maximum 6-lead SOT-23 package APPLICATIONS Battery-powered systems Personal digital assistants Medical instruments Mobile communications Instrumentation and control systems Data acquisition systems High speed modems Optical sensors FUNCTIONAL BLOCK DIAGRAM CONTROL LOGIC 12-/10-/8-BIT SUCCESSIVE- APPROXIMATION ADC VIN SCLK SDATA CS VDD GND AD7476/AD7477/AD7478 Figure 1. GENERAL DESCRIPTION The AD7476/AD7477/AD74781 are, respectively, 12-bit, 10-bit, and 8-bit, high speed, low power, successive approximation ADCs. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. Each part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 6 MHz. The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is initiated at this point. There are no pipeline delays associated with these parts. The AD7476/AD7477/AD7478 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the parts is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus, the analog input range for the parts are 0 V to VDD. The conversion rate is determined by the SCLK. 1 Protected by U.S. Patent No. 6,681,332. PRODUCT HIGHLIGHTS 1. First 12-/10-/8-Bit ADCs in SOT-23 Packages. 2. High Throughput with Low Power Consumption. 3. Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock speed increase. This allows the average power consumption to be reduced while not converting. The parts also feature a shutdown mode to maximize power efficiency at lower throughput rates. Current consumption is 1 μA maximum when in shutdown mode. 4. Reference Derived from the Power Supply. 5. No Pipeline Delay. The parts feature a standard successive- approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control. |
同様の部品番号 - AD7476ARTZ-REEL3 |
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同様の説明 - AD7476ARTZ-REEL3 |
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