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AD7274BRMZ-REEL2 Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD7274BRMZ-REEL2 Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 29 page 3 MSPS,10-/12-Bit ADCs in 8-Lead TSOT AD7273/AD7274 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 © 2005 Analog Devices, Inc. All rights reserved. FEATURES Throughput rate: 3 MSPS Specified for VDD of 2.35 V to 3.6 V Power consumption 11.4 mW at 3 MSPS with 3 V supplies Wide input bandwidth 70 dB SNR at 1 MHz input frequency Flexible power/serial clock speed management No pipeline delays High speed serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible Temperature range: −40°C to +125°C Power-down mode: 0.1 μA typ 8-lead TSOT package 8-lead MSOP package GENERAL DESCRIPTION The AD7273/AD7274 are 10-/12-bit, high speed, low power, successive approximation ADCs, respectively. The parts operate from a single 2.35 V to 3.6 V power supply and feature throughput rates of up to 3 MSPS. Each part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 55 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 also initiated at this point. The conversion rate is determined by the SCLK. There are no pipeline delays associated with these parts. The AD7273/AD7274 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the parts is applied externally and can be in the range of 1.4 V to VDD. This allows the widest dynamic input range to the ADC. FUNCTIONAL BLOCK DIAGRAM T/H CONTROL LOGIC 10-/12-BIT SUCCESSIVE APPROXIMATION ADC DGND VDD AD7273/AD7274 VIN AGND SCLK SDATA CS VREF Figure 1. Table 1. Part Number Resolution Package AD72731 10 8-lead MSOP 8-Lead TSOT AD72741 12 8-lead MSOP 8-Lead TSOT AD7276 12 8-lead MSOP 6-Lead TSOT AD7277 10 8-lead MSOP 6-Lead TSOT AD7278 8 8-lead MSOP 6-Lead TSOT 1 Parts contain external reference pin. PRODUCT HIGHLIGHTS 1. 3 MSPS ADCs in an 8-lead TSOT package. 2. High throughput with low power consumption. 3. Flexible power/serial clock speed management. Allows maximum power efficiency at low throughput rates. 4. Reference can be driven up to the power supply. 5. No pipeline delay. 6. The parts feature a standard successive approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control. |
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