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SPT7835 Datasheet(PDF) 1 Page - Cadeka Microcircuits LLC. |
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SPT7835 Datasheet(HTML) 1 Page - Cadeka Microcircuits LLC. |
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1 / 12 page  SPT7835 10-BIT, 5 MSPS, 75 mW A/D CONVERTER TECHNICAL DATA JUNE 27, 2001 FEATURES • Monolithic 5 MSPS converter • 75 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 • IR imaging • Scanners • Digital communications GENERAL DESCRIPTION The SPT7835 is a 10-bit monolithic, low-cost, ultralow- power analog-to-digital converter capable of minimum word rates of 5 MSPS. The on-chip track-and-hold func- tion assures very good dynamic performance without the need for external components. The input drive require- ments are minimized due to the SPT7835’s low input capacitance of only 5 pF. Power dissipation is extremely low at only 75 mW typical at 5 MSPS with a power supply of +5.0 V. The digital out- puts are +3 V or +5 V, and are user selectable. The SPT7835 is pin-compatible with an entire family of 10-bit, CMOS converters (SPT7835/40/50/55/60/61), which sim- plifies upgrades. The SPT7835 has incorporated propri- etary circuit design* and CMOS processing technologies to achieve its advanced performance. Inputs and outputs are TTL/CMOS-compatible to interface with TTL/CMOS logic systems. Output data format is straight binary. The SPT7835 is available in a 28-lead SOIC package over the industrial temperature range, and a 32-lead small (7 mm square) TQFP package over the commercial temperature range. *Patent pending BLOCK DIAGRAM 11-Bit SAR DAC ADC Section 1 T/H 11 11-Bit SAR DAC ADC Section 8 Auto- Zero CMP Auto- Zero CMP T/H 11 VREF 1:8 Mux 11 11 11 11 11-Bit 8:1 Mux/ Error Correction Timing and Control P1 P2 P7 P8 ADC Section 2 ADC Section 7 Reference Ladder Ref In Enable CLK In Data Valid AIN D10 Overrange D9 (MSB) D8 D7 D6 D5 D4 D3 D2 D1 D0 (LSB) ... ... ... ... |
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