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AD7324BRUZ Datenblatt(PDF) 1 Page - Analog Devices |
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AD7324BRUZ Datenblatt(HTML) 1 Page - Analog Devices |
1 / 36 page 4-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC AD7324 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 FUNCTIONAL BLOCK DIAGRAM 12-bit plus sign SAR ADC VIN0 DOUT SCLK CS DIN VDRIVE VIN1 VIN2 VIN3 VDD REFIN/OUT VCC AGND VSS DGND CONTROL LOGIC AND REGISTERS 13-BIT SUCCESSIVE APPROXIMATION ADC T/H 2.5V VREF I/P MUX CHANNEL SEQUENCER AD7324 True bipolar input ranges Software-selectable input ranges ±10 V, ±5 V, ±2.5 V, 0 V to +10 V 1 MSPS throughput rate Four analog input channels with channel sequencer Single-ended, true differential, and pseudo differential analog input capability High analog input impedance Low power: 21 mW Full power signal bandwidth: 22 MHz Internal 2.5 V reference High speed serial interface Power-down modes 16-lead TSSOP package iCMOS™ process technology Figure 1. GENERAL DESCRIPTION PRODUCT HIGHLIGHTS 1. The AD7324 can accept true bipolar analog input signals, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V unipolar signals. The AD73241 is a 4-channel, 12-bit plus sign, successive approximation ADC designed on the iCMOS (industrial CMOS) process. iCMOS is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies. It enables the development of a wide range of high performance analog ICs capable of 33 V operation in a footprint that no previous generation of high voltage parts could achieve. Unlike analog ICs using conventional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, dramatically reduced power consumption, and reduced package size. 2. The four analog inputs can be configured as four single- ended inputs, two true differential input pairs, two pseudo differential inputs, or three pseudo differential inputs. 3. 1 MSPS serial interface. SPI®-/QSPI™-/DSP-/MICROWIRE™- compatible interface. 4. Low power, 30 mW maximum, at 1 MSPS throughput rate. 5. Channel sequencer. The AD7324 can accept true bipolar analog input signals. The AD7324 has four software-selectable input ranges, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. Each analog input channel can be independently programmed to one of the four input ranges. The analog input channels on the AD7324 can be programmed to be single-ended, true differential, or pseudo differential. Table 1. Similar Products Selection Table Device Number Throughput Rate Number of Channels Number of bits AD7329 250 kSPS 12-bit plus sign 8 The ADC contains a 2.5 V internal reference. The AD7324 also allows for external reference operation. If a 3 V reference is applied to the REFIN/OUT pin, the AD7324 can accept a true bipolar ±12 V analog input. Minimum ±12 V VDD and VSS supplies are required for the ±12 V input range. The ADC has a high speed serial interface that can operate at throughput rates up to 1 MSPS. AD7328 1000 kSPS 12-bit plus sign 8 AD7327 500 kSPS 12-bit plus sign 8 AD7323 500 kSPS 12-bit plus sign 4 AD7322 1000 kSPS 12-bit plus sign 2 AD7321 500 kSPS 12-bit plus sign 2 1 Protected by U.S. Patent No. 6,731,232. |
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