ADC12020 Datasheet | National Semiconductor

Description The ADC12020 is a monolithic CMOS analog-to-digital converter capable of converting analog input signals into 12-bit digital words at 20 Megasamples per second (MSPS), minimum. This converter uses a differential, pipeline architecture with digital error correction and an on-chip sample-and-hold circuit to minimize die size and power consumption while providing excellent dynamic performance. Operating on a single 5V power supply, this device consumes just 185 m W at 20 MSPS, including the reference current. The Power Down feature reduces power consumption to 40 m W. The differential inputs provide a full scale input swing equal to 2VREF with the possibility of a single-ended input. Full use of the differential input is remended for optimum performance. For ease of use, the buffered, high impedance, single-ended reference input is converted on-chip to a differential reference for use by the processing circuitry. Output data format is 12-bit offset binary. This device is available in the 32-lead LQFP package and will operate over the industrial temperature range of - 40˚C to +85˚C. Features n n n n n Internal sample-and-hold Outputs 2.5V to 5V patible TTL/CMOS patible input/outputs Power down mode On-chip reference buffer Key Specifications n n n n n n n n n Resolution Conversion Rate DNL INL SNR (f IN = 10.1 MHz) ENOB (f IN = 10.1 MHz) Data Latency Supply Voltage Power Consumption, 20 MHz 12 Bits 20 MSPS (min) ± 0.35 LSB (typ) ± 0.55 LSB (typ) 70 d B (typ) 11.3 bits (typ) 6 Clock Cycles +5V ± 5% 185 m W (typ) Applications n n n n n n n Image Processing Front End Instrumentation PC-Based Data Acquisition Fax Machines Waveform Digitizers Sonar/Radar DSP Front Ends Connection Diagram TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 2003 National Semiconductor Corporation DS200517 .national. Ordering Information Industrial (- 40˚C ≤ TA ≤ +85˚C) ADC12020CIVY ADC12020CIVYX ADC12020EVAL Package 32 Pin LQFP 32...