ADC12040_06 Datasheet, PDF (1/19 Pages) National Semiconductor (TI) – 12-Bit, 40 MSPS, 340mW A/D Converter with Internal Sample-and-Hold

January 2006
ADC12040
12-Bit, 40 MSPS, 340mW A/D Converter with Internal
Sample-and-Hold
General Description
The ADC12040 is a monolithic CMOS analog-to-digital con-
verter capable of converting analog input signals into 12-bit
digital words at 40 Megasamples per second (MSPS), mini-
mum. 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 2V_REF 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.
Features
n Single +5V supply operation
n Internal sample-and-hold
n Outputs 2.35V to 5V compatible
n Pin Compatible with ADC12010, ADC12020,
ADC12L063, ADC12L066
n Power down mode
n On-chip reference buffer
Key Specifications
n Supply Voltage
n DNL
n SNR (f_IN = 10MHz)
n ENOB (f_IN = 10MHz)
n Power Consumption, 40 MHz
+5V ±5%
±0.4 LSB (typ)
69 dB (typ)
11.2 bits (typ)
340 mW (typ)
Applications
n Ultrasound and Imaging
n Instrumentation
n Cellular Base Stations/Communications Receivers
n Sonar/Radar
n xDSL
n Wireless Local Loops/Cable Modems
n HDTV/DTV
n DSP Front Ends
Connection Diagram
© 2006 National Semiconductor Corporation DS200148
20014801
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