12-Bit, 2.7 V To 5.25 V, 1.5 MSPS Low Power ADCThe AD7470 AD7472 are 10-bit/12-bit high speed, low power,
successive approximation ADCs The parts operate from a single
2.7 V to 5.25 V power supply and feature throughput rates up to
1.5 MSPS for the 12-bit AD7472 and up to 1.75 MSPS for the
10-bit AD7470. The parts contain a low noise, wide bandwidth
track-and-hold Amplifier that CAN handle input frequencies in
excess of 1 MHz.
The conversion process and data acquisition are controlled
using standard control inputs, allowing easy interfacing to
Microprocessors or DSPs The input signal is sampled on the
falling edge of CONVST, and conversion is also initiated at
this point. BUSY goes high at the start of conversion and
goes low 531.66 ns after falling edge of CONVST AD7472
with a Clock frequency of 26MHz) to indicate that the con-
version is complete. There are no pipeline delays associated
with the parts. The conversion result is accessed via standard
CS and RD signals over a high speed parallel Interface
The AD7470 AD7472 use advanced design techniques to
achieve very low power dissipation at high throughput rates. With
3 V supplies and 1.5 MSPS throughput rates, the AD7470
typically consumes, on average, just 1.1 mA. With 5 V supplies
and 1.75 MSPS, the average current consumption is typically
1.6 mA. The part also offers flexible power/throughput rate
management. Operating the AD7470 with 3 V supplies and
500 kSPS throughput reduces the current consumption to 713
At 5 V supplies and 500 kSPS, the part consumes 944 . By Analog Devices, Inc.
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