ADC12191 Datasheet | National Semiconductor

Description The ADC12191 is a monolithic CMOS analog-to-digital converter capable of converting analog input signals into 12-bit digital words at 10 megasamples per second (MSPS). The ADC12191 utilizes an innovative pipeline architecture to minimize die size and power consumption. The ADC12191 uses self-calibration and error correction to maintain accuracy and performance over temperature. The ADC12191 converter operates on a 5V power supply and can digitize analog input signals in the range of 0 to 2V. A single convert clock controls the conversion operation. All digital I/O is TTL patible. The ADC12191 is designed to minimize external ponents necessary for the analog input interface. An internal sample-and-hold circuit samples the analog input and an internal amplifier buffers the reference voltage input. The ADC12191 is available in the 32-lead TQFP package and is designed to operate over the extended mercial temperature range of -40˚C to +85˚C. Features n n n n n Single 5V power supply Simple analog input interface Internal Sample-and-hold Internal Reference buffer amplifier Low power consumption Key Specifications n Resolution n Conversion Rate n DNL n SNR n ENOB n Analog Input Range n Supply Voltage n Power Consumption, 10 MHz 12 Bits 10 Msps (min) ± 0.5 LSB (typ) 63 d B (typ) 10 Bits (typ) 2 Vpp (min) +5V ± 5% 235 m W (typ) Applications n n n n n Image processing front end PC-based data acquisition Scanners Fax machines Waveform digitizer Connection Diagram DS101040-1 © 2000 National Semiconductor Corporation DS101040 .national. Ordering Information Industrial (- 40˚C ≤ TA ≤ +85˚C) ADC12191CIVT ADC12181 EVAL Package 32 pin TQFP Evaluation Board Simplified Block Diagram DS101040-2 .national. Pin Descriptions and Equivalent Circuits #2 No. 2 Symbol VIN Equivalent Circuit Description Analog signal input. With a 2.0V reference voltage, input signal voltages in the range of 0 to 2.0 Volts will be converted. See section 1.2....