AD7895ANZ-10

AD7895ANZ-10 is a fast 12-bit ADC that operates from a single +5V supply. The part contains a 3.8µs successive approximation A/D converter, an on-chip track/hold amplifier, an on-chip clock and a high speed serial interface. Output data from the AD7895 is provided via a high speed, serial interface port. This two-wire serial interface has a serial clock input and a serial data output with the external serial clock accessing the serial data from the part. In addition to the traditional dc accuracy specifications such as linearity and full-scale and offset errors, the AD7895 is specified for dynamic performance parameters, including harmonic distortion and signal-to-noise ratio. It features a high sampling rate mode and, for low power applications, a proprietary automatic power-down mode where the part automatically goes into power down once conversion is complete and “wakes up” before the next conversion cycle.

• Single 5V supply operation, high speed, easy-to-use, serial interface
• On-chip track/hold amplifier, high input impedance
• Signal to (noise + distortion) ratio is 70dB minimum at (fIN = 50KHz sine wave, fSAMPLE = 200KHz)
• Relative accuracy is ±1LSB maximum at (VDD = +5V, GND = 0V, REF IN = +2.5V)
• Differential nonlinearity is ±1LSB maximum at (VDD = +5V, GND = 0V, REF IN = +2.5V)
• Input voltage range is ±10V, input resistance 24Kohm minimum
• Track/hold acquisition time is 0.5µs maximum at (VDD = +5V, GND = 0V, REF IN = +2.5V)
• Bipolar zero error ±4LSB maximum at (VDD = +5V, GND = 0V, REF IN = +2.5V)
• Power dissipation is 25µW maximum at (+25°C, VDD = +5V, GND = 0V, REF IN = +2.5V)
• Operating temperature range from -40°C to +85°C, 8-lead plastic DIP package

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