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SPT7734SCS Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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SPT7734SCS Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 9 page SPT7734 8-BIT, 40 MSPS,175 mW A/D CONVERTER FEATURES • Monolithic 40 MSPS Converter • 175 mW Power Dissipation • On-Chip Track-and-Hold • Single +5 V Power Supply • TTL/CMOS Outputs • 5 pF Input Capacitance • Low Cost • Tri-State Output Buffers • High ESD Protection: 3,500 V Minimum • Selectable +3 V or +5 V Logic I/O APPLICATIONS • All High-Speed Applications Where Low Power Dissipation is Required • Video Imaging • Medical Imaging • Radar Receivers • IR Imaging • Digital Communications GENERAL DESCRIPTION The SPT7734 is a 8-bit monolithic, low cost, ultralow power analog-to-digital converter capable of minimum word rates of 40 MSPS. The on-chip track-and-hold function assures very good dynamic performance without the need for exter- nal components. The input drive requirements are mini- mized due to the SPT7734's low input capacitance of only 5 pF. Power dissipation is extremely low at only 175 mW typical at 40 MSPS with a power supply of +5.0 V. The digital outputs are +3 V or +5 V, and are user selectable. The SPT7734 has incorporated proprietary circuit design and CMOS process- ing technologies to achieve its advanced performance. In- puts and outputs are TTL/CMOS compatible to interface with TTL/CMOS logic systems. Output data format is straight binary. The SPT7734 is available in 28-lead SOIC and 32-lead small (7 mm square) TQFP packages over the commercial tem- perature range. .. . 9-Bit SAR DAC ADC Section 1 T/H 9 9-Bit SAR DAC ADC Section 16 Auto- Zero CMP Auto- Zero CMP T/H 9 VREF 1:16 Mux . . . 9 9 9 9 9-Bit 16:1 Mux/ Error Correction Timing and Control P1 P2 P15 P16 ADC Section 2 ADC Section 15 . . . Reference Ladder Ref In Enable CLK In Data Vali d AIN . . . D8 Overrange D7 (MSB) D6 D5 D4 D3 D2 D1 DØ (LSB) BLOCK DIAGRAM |
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