ADC12D040
ADC12D040 is Dual 12-Bit 40MSPS 600mW A/D Converter manufactured by National Semiconductor.
Description
The ADC12D040 is a dual, low power 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, pipelined 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, the ADC12D040 achieves 10.9 effective bits at 10 MHz input and consumes just 600 m W at 40 MSPS, including the reference current. The Power Down feature reduces power consumption to 75 m W. The differential inputs provide a full scale input swing equal to VREF 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. The digital outputs for the two ADCs are available on separate 12-bit buses with an output data format choice of offset binary or 2’s plement. For ease of interface, the digital output driver power pins of the ADC12D040 can be connected to a separate supply voltage in the range of 2.5V to the digital supply voltage, making the outputs patible with low voltage systems. When not converting, power consumption can be reduced by pulling the PD pin high, placing the converter into the powerdown state where it typically consumes just 75 m W. The ADC12D040’s speed, resolution and single supply operation make it well suited for a variety of applications. This device is available in the 64-lead TQFP package and will operate over the industrial temperature range of
- 40˚C to +85˚C.
Features n n n n n n n n n Binary/2’s p output format Single supply operation Internal sample-and-hold Outputs 2.5V to 5V patible TTL/CMOS patible input/outputs Low power consumption Power down mode On-chip reference...
