描述 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 mW at 20 MSPS, including the reference current. The Power Down feature reduces power consumption to 40 mW.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 recommended 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.

特性 Features

? Internal sample-and-hold
? Outputs 2.35V to 5V compatible
? Pin compatible with ADC12010, ADC12040, ADC12L063 and ADC12L066
? TTL/CMOS compatible input/outputs
? Power down mode
? On-chip reference buffer
Key Specifications
? Resolution 12 Bits
? Conversion Rate 20 MSPS (min)
? DNL ±0.35 LSB (typ)
? ENOB (fIN = 10.1 MHz) 11.3 bits (typ)
? Supply Voltage +5 / ±5 V / %
? Power Consumption, 20 MHz 185 mW (typ)