ADI AD7492ARUZ-4REEL7

The AD7492, AD7492 - 4, and AD7492 - 5 are 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 1.25 MSPS. They contain a low noise, wide bandwidth track/hold amplifier that can handle bandwidths up to 10 MHz. The conversion process and data acquisition are controlled using standard control inputs allowing for easy interface to microprocessors or DSPs. The input signal is sampled on the falling edge of CONVST and conversion is also initiated at this point. The BUSY pin goes high at the start of conversion and goes low 880 ns (AD7492/AD7492 - 4) or 680 ns (AD7492 - 5) later to indicate that the conversion is complete. There are no pipeline delays associated with the part. The conversion result is accessed via standard CS and RD signals over a high speed parallel interface. The AD7492 uses advanced design techniques to achieve very low power dissipation at high throughput rates. With 5 V supplies and 1.25 MSPS, the average current consumption AD7492 - 5 is typically 2.75 mA. The part also offers flexible power/throughput rate management. It is also possible to operate the part in a full sleep mode and a partial sleep mode, where the part wakes up to do a conversion and automatically enters a sleep mode at the end of conversion.

• Specified for VDD of 2.7 V to 5.25 V
• Throughput rate of 1 MSPS (AD7492)
• Throughput rate of 1.25 MSPS (AD7492 - 5)
• Throughput rate of 400 kSPS (AD7492 - 4)
• Low power
• 4 mW typ at 1 MSPS with 3 V supplies
• 11 mW typ at 1 MSPS with 5 V supplies
• Wide input bandwidth
• 70 dB typ SNR at 100 kHz input frequency
• 2.5 V internal reference
• On - chip CLK oscillator
• Flexible power/throughput rate management
• No pipeline delays
• High speed parallel interface
• Sleep mode: 50 nA typ
• 24 - lead SOIC and TSSOP packages