AD7880

a LC2MOS Single +5 V Supply, Low Power, 12-Bit Sampling ADC FEATURES 12-Bit Monolithic A/D Converter 66 kHz Throughput Rate 12 ␮s Conversion Time 3 ␮s On-Chip Track/Hold Amplifier Low Power Power Save Mode: 2 mW typ Normal Operation: 25 mW typ 70 dB SNR Fast Data Access Time: 57 ns Small 24-Lead SOIC and 0.3" DIP Packages APPLICATIONS Battery Powered Portable Systems Digital Signal Processing Speech Recognition and Synthesis High Speed Modems Control and Instrumentation AD7880 FUNCTIONAL BLOCK DIAGRAM VINA VINB VREF AGND CS CLKIN CONVST RD BUSY VDD R SAMPLING COMPARATOR LOW POWER MODE R + CONTROL CIRCUIT – 12-BIT DAC CONTROL LOGIC SAR + COUNTER THREE STATE BUFFERS DB11 DB0 AD7880 DGND GENERAL DESCRIPTION The AD7880 is a high speed, low power, 12-bit A/D converter which operates from a single +5 V supply. It consists of a 3 µs track/hold amplifier, a 12 µs successive-approximation ADC, versatile interface logic and a multiple-input-range circuit. The part also i...