AD7864ASZ-3

AD7864ASZ-3 is a high speed, low power, 4-channel, simultaneous sampling 12-bit analogue-to-digital converter (ADC) that operates from a single 5V supply. The part contains a 1.65μs successive approximation ADC, four track-and-hold amplifiers, a 2.5V reference, an on-chip clock oscillator, signal conditioning circuitry, and a high speed parallel interface. A single conversion start signal active-low CONVST simultaneously places all the track-and-holds into hold and initiates a conversion sequence for the selected channels. The active-low EOC signal indicates the end of each individual conversion in the selected conversion sequence. The BUSY signal indicates the end of the conversion sequence. It is used in applications such as AC motor control, uninterrupted power supplies, data acquisition systems, communications.

• High speed (1.65μs) 12bit ADC, HW/SW select of channel sequence for conversion
• 4 simultaneously sampled inputs, 4 track-and-hold amplifiers
• Overvoltage protection on analogue inputs, conversion time is 1.65μs maximum
• Track-and-hold acquisition time is 0.35μs maximum at (VDD = 5V ± 5%, AGND = DGND = 0V)
• Conversion time 1.65μs maximum at (VDD = 5V ± 5%, AGND = DGND = 0V)
• 3MHz typical -3dB full power bandwidth at (VDD = 5V ± 5%, AGND = DGND = 0V)
• Signal-to-(noise + distortion) ratio is 70dB minimum at (VDD = 5V ± 5%, AGND = DGND = 0V)
• Relative accuracy is ±1LSB maximum at (VDD = 5V ± 5%, AGND = DGND = 0V)
• Throughput time is 130kSPS maximum at (VDD = 5V ± 5%, AGND = DGND = 0V)
• Operating temperature range from -40°C to +85°C, 44-lead MQFP package

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