1FEATURES
2• Single +5V Supply Operation
• Internal Sample-and-Hold
• Outputs 2.35V to 5V Compatible
• Pin Compatible with ADC12010, ADC12020,
ADC12L063, ADC12L066
• Power Down Mode
• On-Chip Reference Buffer

APPLICATIONS
• Ultrasound and Imaging
• Instrumentation
• Cellular Base Stations/Communications
Receivers
• Sonar/Radar
• xDSL
• Wireless Local Loops/Cable Modems
• HDTV/DTV
• DSP Front Ends

KEY SPECIFICATIONS
• Supply Voltage: +5V ±5%
• DNL: ±0.4 LSB (typ)
• SNR (fIN = 10MHz): 69 dB (typ)
• ENOB (fIN = 10MHz): 11.2 bits (typ)
• Power Consumption, 40 MHz: 340 mW (typ)

DESCRIPTION
The ADC12040 is a monolithic CMOS analog-to-
digital converter capable of converting analog input
signals into 12-bit digital words at 40 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 340 mW at 40 MSPS, including the reference
current. The Power Down feature reduces power
consumption to 40 mW.
The differential inputs provide a full scale differential
input swing equal to 2VREF with the possibility of a
single-ended input, although full use of the differential
input is required 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.