Moteur de recherche de fiches techniques de composants électroniques |
|
AD678AD Fiches technique(PDF) 1 Page - Analog Devices |
|
AD678AD Fiches technique(HTML) 1 Page - Analog Devices |
1 / 14 page FUNCTIONAL BLOCK DIAGRAM AD678 CS SC OE EOCEN SYNC 12/8 EOC DB11 DB2 DB1 (R/ L) DB0 (HBE) VCC VEE VDD DGND OUTPUT REGISTER 4-BIT FLASH A/D CONVERTER CONTROL LOGIC CONVERSION LOGIC SAMPLE/ HOLD GAIN STAGE 12-BIT D/A CONVERTER VOLTAGE REF. 12 12 4 REFOUT REFIN BIPOFF AIN AGND a 12-Bit 200 kSPS Complete Sampling ADC AD678* FEATURES AC and DC Characterized and Specified (K, B and T Grades) 200k Conversions per Second 1 MHz Full Power Bandwidth 500 kHz Full Linear Bandwidth 72 dB S/N+D (K, B, T Grades) Twos Complement Data Format (Bipolar Mode) Straight Binary Data Format (Unipolar Mode) 10 M Input Impedance 8-Bit or 16-Bit Bus Interface On-Board Reference and Clock 10 V Unipolar or Bipolar Input Range Commercial, Industrial and Military Temperature Range Grades MIL-STD-883 Compliant Versions Available PRODUCT DESCRIPTION The AD678 is a complete, multipurpose 12-bit monolithic analog-to-digital converter, consisting of a sample-hold ampli- fier (SHA), a microprocessor compatible bus interface, a voltage reference and clock generation circuitry. The AD678 is specified for ac (or “dynamic”) parameters such as S/N+D ratio, THD and IMD which are important in signal processing applications. In addition, the AD678K, B and T grades are fully specified for dc parameters which are important in measurement applications. The AD678 offers a choice of digital interface formats; the 12 data bits can be accessed by a 16-bit bus in a single read opera- tion or by an 8-bit bus in two read operations (8+4), with right or left justification. Data format is straight binary for unipolar mode and twos complement binary for bipolar mode. The input has a full-scale range of 10 V with a full power bandwidth of 1 MHz and a full linear bandwidth of 500 kHz. High input im- pedance (10 M Ω) allows direct connection to unbuffered sources without signal degradation. This product is fabricated on Analog Devices’ BiMOS process, combining low power CMOS logic with high precision, low noise bipolar circuits; laser-trimmed thin-film resistors provide high accuracy. The converter utilizes a recursive subranging algorithm which includes error correction and flash converter circuitry to achieve high speed and resolution. The AD678 operates from +5 V and ±12 V supplies and dissipates 560 mW (typ). The AD678 is available in 28-lead plastic DIP, ceramic DIP, and 44-lead J-leaded ceramic surface mount packages. Screening to MIL-STD-883C Class B is also available. *Protected by U.S. Patent Nos. 4,804,960; 4,814,767; 4,833,345; 4,250,445; 4,808,908; RE30,586. PRODUCT HIGHLIGHTS 1. COMPLETE INTEGRATION: The AD678 minimizes ex- ternal component requirements by combining a high speed sample-hold amplifier (SHA), ADC, 5 V reference, clock and digital interface on a single chip. This provides a fully speci- fied sampling A/D function unattainable with discrete designs. 2. SPECIFICATIONS: The AD678K, B and T grades provide fully specified and tested ac and dc parameters. The AD678J, A and S grades are specified and tested for ac parameters; dc accuracy specifications are shown as typicals. DC specifica- tions (such as INL, gain and offset) are important in control and measurement applications. AC specifications (such as S/N+D ratio, THD and IMD) are of value in signal process- ing applications. 3. EASE OF USE: The pinout is designed for easy board lay- out, and the choice of single or two read cycle output pro- vides compatibility with 16- or 8-bit buses. Factory trimming eliminates the need for calibration modes or external trim- ming to achieve rated performance. 4. RELIABILITY: The AD678 utilizes Analog Devices’ mono- lithic BiMOS technology. This ensures long-term reliability compared to multichip and hybrid designs. 5. UPGRADE PATH: The AD678 provides the same pinout as the 14-bit, 128 kSPS AD679 ADC. 6. The AD678 is available in versions compliant with MIL- STD-883. Refer to the Analog Devices Military Products Databook or current AD678/883B data sheet for detailed specifications. REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 |
Numéro de pièce similaire - AD678AD |
|
Description similaire - AD678AD |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |