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SPT7861SCS Datasheet(PDF) 1 Page - Cadeka Microcircuits LLC. |
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SPT7861SCS Datasheet(HTML) 1 Page - Cadeka Microcircuits LLC. |
1 / 11 page SPT7861 10-BIT, 40 MSPS, 160 mW A/D CONVERTER TECHNICAL DATA JUNE 25, 2001 FEATURES • Monolithic 40 MSPS converter • 160 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 SPT7861 is a 10-bit monolithic, low-cost, ultralow- power analog-to-digital converter capable of minimum word rates of 40 MSPS. This is a pin-compatible improved version of the SPT7860. The on-chip track-and-hold func- tion assures excellent dynamic performance without the need for external components. The input drive require- ments are minimized due to the SPT7861’s low input capacitance of only 5 pF. Power dissipation is extremely low at only 160 mW typical at 40 MSPS with a power supply of +5.0 V. The digital out- puts are +3 V or +5 V, and are user selectable. The SPT7861 is pin-compatible with an entire family of 10-bit, CMOS converters (SPT7835/40/50/55/60/61), which sim- plifies upgrades. The SPT7861 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 SPT7861 is available in 28-lead SOIC and 32-lead small (7 mm square) TQFP packages over the commer- cial temperature range. 11-Bit SAR DAC ADC Section 1 T/H 11 11-Bit SAR DAC ADC Section 16 Auto- Zero CMP Auto- Zero CMP T/H 11 VREF 1:16 Mux 11 11 11 11 11-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 Valid AIN D10 Overrange D9 (MSB) D8 D7 D6 D5 D4 D3 D2 D1 D0 (LSB) ... ... ... ... BLOCK DIAGRAM |
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