поискавой системы для электроныых деталей |
|
AD7863BR-10REEL7 датащи(PDF) 1 Page - Analog Devices |
|
AD7863BR-10REEL7 датащи(HTML) 1 Page - Analog Devices |
1 / 24 page Simultaneous Sampling Dual 175 kSPS 14-Bit ADC AD7863 Rev. B 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 ©2006 Analog Devices, Inc. All rights reserved. FEATURES Two fast 14-bit ADCs Four input channels Simultaneous sampling and conversion 5.2 μs conversion time Single supply operation Selection of input ranges ±10 V for AD7863-10 ±2.5 V for AD7863-3 0 V to 2.5 V for AD7863-2 High speed parallel interface Low power, 70 mW typical Power saving mode, 105 μW maximum Overvoltage protection on analog inputs 14-bit lead compatible upgrade to AD7862 GENERAL DESCRIPTION The AD7863 is a high speed, low power, dual 14-bit analog-to- digital converter that operates from a single 5 V supply. FUNCTIONAL BLOCK DIAGRAM DGND DB0 BUSY CS CONVST AD7863 2kΩ AGND AGND VDD VREF DB13 A0 TRACK/ HOLD TRACK/ HOLD MUX 2.5V REFERENCE OUTPUT LATCH RD CONVERSION CONTROL LOGIC SIGNAL SCALING SIGNAL SCALING SIGNAL SCALING MUX 14-BIT ADC 14-BIT ADC CLOCK VA2 VB2 VA1 VB1 SIGNAL SCALING Figure 1. The part contains two 5.2 μs successive approximation ADCs, two track/hold amplifiers, an internal 2.5 V reference and a high speed parallel interface. Four analog inputs are grouped into two channels (A and B) selected by the A0 input. Each channel has two inputs (VA1 and VA2 or VB1 and VB2) that can be sampled and converted simultaneously, thus preserving the relative phase information of the signals on both analog inputs. The part accepts an analog input range of ±10 V (AD7863-10), ±2.5 V (AD7863-3), and 0 V to 2.5 V (AD7863-2). Overvoltage protection on the analog inputs for the part allows the input voltage to go to ±17 V, ±7 V, or +7 V respectively, without causing damage. A single conversion start signal (CONVST) simultaneously places both track/holds into hold and initiates conversion on both channels. The BUSY signal indicates the end of conversion and at this time the conversion results for both channels are available to be read. The first read after a conversion accesses the result from VA1 or VB1, and the second read accesses the result from VA2 or VB2, depending on whether the multiplexer select (A0) is low or high, respectively. Data is read from the part via a 14-bit parallel data bus with standard CS and RD signals. In addition to the traditional dc accuracy specifications such as linearity, gain, and offset errors, the part is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio. The AD7863 is fabricated in the Analog Devices, Inc. linear compatible CMOS (LC2MOS) process, a mixed technology process that combines precision bipolar circuits with low power CMOS logic. It is available in 28-lead SOIC_W and SSOP. PRODUCT HIGHLIGHTS 1. The AD7863 features two complete ADC functions allowing simultaneous sampling and conversion of two channels. Each ADC has a two-channel input mux. The conversion result for both channels is available 5.2 μs after initiating conversion. 2. The AD7863 operates from a single 5 V supply and consumes 70 mW typical. The automatic power-down mode, where the part goes into power-down once conversion is complete and wakes up before the next conversion cycle, makes the AD7863 ideal for battery- powered or portable applications. 3. The part offers a high speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors. 4. The part is offered in three versions with different analog input ranges. The AD7863-10 offers the standard industrial input range of ±10 V; the AD7863-3 offers the common signal processing input range of ±2.5 V, while the AD7863-2 can be used in unipolar 0 V to 2.5 V applications. 5. The part features very tight aperture delay matching between the two input sample and hold amplifiers. |
Аналогичный номер детали - AD7863BR-10REEL7 |
|
Аналогичное описание - AD7863BR-10REEL7 |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |