AD7890ANZ-10

AD7890ANZ-10 is an LC²MOS 8-channel, 12bit serial data acquisition system. The multiplexer on the part is independently accessible. This allows the user to insert an antialiasing filter or signal conditioning, if required, between the multiplexer and the ADC. This means that one antialiasing filter can be used for all eight channels. The connection of an external capacitor allows the user to adjust the time given to the multiplexer settling to include any external delays in the filter or signal conditioning circuitry. Output data from the AD7890 is provided via a high-speed bidirectional serial interface port. The part contains an on-chip control register, allowing control of channel selection, conversion start, and power-down via the serial port. Versatile, high-speed logic ensures easy interfacing to serial ports on microcontrollers and digital signal processors.

• Input voltage range from 0V to 4.096V
• Allows separate access to multiplexer and ADC, on-chip track/hold amplifier
• On-chip reference, high-speed, flexible, serial interface
• Single supply, low-power operation is 50mW maximum at (VDD = 5V, AGND = DGND = 0V)
• Signal to (noise + distortion) ratio is 70dB minimum at (fIN = 10KHz sine wave, fSAMPLE = 100KHz)
• Relative accuracy is ±1LSB maximum at (VDD = 5V, AGND = DGND = 0V, REF IN = 2.5V)
• Differential nonlinearity is ±1LSB maximum at (VDD = 5V, AGND = DGND = 0V, REF IN = 2.5V)
• Conversion time is 5.9μs maximum at (VDD = 5V, AGND = DGND = 0V, REF IN = 2.5V)
• Track/hold acquisition time is 2μs maximum at (VDD = 5V, AGND = DGND = 0V, REF IN = 2.5V)
• Operating temperature range from -40°C to +85°C, 24-lead PDIP package

บันทึก

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