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AD677BD Datasheet(PDF) 1 Page - Analog Devices |
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AD677BD Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page FUNCTIONAL BLOCK DIAGRAM AGND V RE F V IN CLK SAMPLE D CHIP AD677 RAM ALU SAR AGND SENSE CAL BUSY MICROCODED CONTROLLER A CHIP LEVEL TRANSLATORS LOGIC TIMING INPUT BUFFERS COMP DAC CAL 16-BIT DAC 10 9 11 8 16 2 1 15 3 14 SCLK SDATA REV. A 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. a 16-Bit 100 kSPS Sampling ADC AD677 FEATURES Autocalibrating On-Chip Sample-Hold Function Serial Output 16 Bits No Missing Codes 1 LSB INL –99 dB THD 92 dB S/(N+D) 1 MHz Full Power Bandwidth One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 PRODUCT HIGHLIGHTS 1. Autocalibration provides excellent dc performance while eliminating the need for user adjustments or additional exter- nal circuitry. 2. ±5 V to ±10 V input range (±V REF). 3. Available in 16-pin 0.3" skinny DIP or 28-lead SOIC. 4. Easy serial interface to standard ADI DSPs. 5. TTL compatible inputs/outputs. 6. Excellent ac performance: –99 dB THD, 92 dB S/(N+D) peak spurious –101 dB. 7. Industry leading dc performance: 1.0 LSB INL, ±1 LSB full scale and offset. PRODUCT DESCRIPTION The AD677 is a multipurpose 16-bit serial output analog-to- digital converter which utilizes a switched-capacitor/charge redistribution architecture to achieve a 100 kSPS conversion rate (10 µs total conversion time). Overall performance is opti- mized by digitally correcting internal nonlinearities through on-chip autocalibration. The AD677 circuitry is segmented onto two monolithic chips— a digital control chip fabricated on Analog Devices DSP CMOS process and an analog ADC chip fabricated on our BiMOS II process. Both chips are contained in a single package. The AD677 is specified for ac (or “dynamic”) parameters such as S/(N+D) Ratio, THD and IMD which are important in sig- nal processing applications. In addition, dc parameters are specified which are important in measurement applications. The AD677 operates from +5 V and ±12 V supplies and typi- cally consumes 450 mW using a 10 V reference (360 mW with 5 V reference) during conversion. The digital supply (VDD) is separated from the analog supplies (VCC, VEE) for reduced digi- tal crosstalk. An analog ground sense is provided to remotely sense the ground potential of the signal source. This can be use- ful if the signal has to be carried some distance to the A/D con- verter. Separate analog and digital grounds are also provided. The AD677 is available in a 16-pin narrow plastic DIP, 16-pin narrow side-brazed ceramic package, or 28-lead SOIC. A paral- lel output version, the AD676, is available in a 28-pin ceramic or plastic DIP. All models operate over a commercial tempera- ture range of 0 °C to +70°C or an industrial range of –40°C to +85 °C. |
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