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AD7323BRUZ-REEL Arkusz danych(PDF) 1 Page - Analog Devices |
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AD7323BRUZ-REEL Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 37 page 500 kSPS, 4-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC Data Sheet AD7323 Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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 ©2006–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 12-bit plus sign SAR ADC True bipolar input ranges Software-selectable input ranges ±10 V, ±5 V, ±2.5 V, 0 V to +10 V 500 kSPS 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: 18 mW Full power signal bandwidth: 22 MHz Internal 2.5 V reference High speed serial interface Power-down modes 16-lead TSSOP package i CMOS process technology FUNCTIONAL BLOCK DIAGRAM 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 AD7323 Figure 1. GENERAL DESCRIPTION The AD73231 is a 4-channel, 12-bit plus sign successive approximation analog-to-digital converter (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 conven- tional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, dramati- cally reduced power consumption, and reduced package size. The AD7323 can accept true bipolar analog input signals. The AD7323 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 AD7323 can be programmed to be single-ended, true differential, or pseudo differential. The ADC contains a 2.5 V internal reference. The AD7323 also allows for external reference operation. If a 3 V reference is applied to the REFIN/OUT pin, the AD7323 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 500 kSPS. PRODUCT HIGHLIGHTS 1. The AD7323 can accept true bipolar analog input signals, ±10 V, ±5 V, and ±2.5 V, and 0 V to +10 V unipolar signals. 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. 500 kSPS serial interface. SPI-/QSPI™-/DSP-/MICROWIRE™- compatible interface. 4. Low power, 18 mW, at a maximum throughput rate of 500 kSPS. 5. Channel sequencer. Table 1. Similar Devices Device Number Throughput Rate Number of bits Number of Channels AD7329 1000 kSPS 12-bit plus sign 8 AD7328 1000 kSPS 12-bit plus sign 8 AD7327 500 kSPS 12-bit plus sign 8 AD7324 1000 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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