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AD9040APWB Datasheet(PDF) 9 Page - Analog Devices |
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AD9040APWB Datasheet(HTML) 9 Page - Analog Devices |
9 / 12 page AD9040A REV. B –9– Figure 9. PCB Bottom View Table II. Digital Coding Analog Voltage Out-of- Input Level Range Digital Output MSB . . . LSB +1.002 V Positive Full Scale + 1 LSB 1 1111111111 +1 V Positive Full Scale 0 1111111111 Full Scale – 1 LSB 0 1111111110 +1/2 V Positive 1/2 Scale 0 1100000000 1/2 Scale – 1 LSB 0 1011111111 0 V Bipolar Zero 0 10000000000 0 01111111111 –1/2 V 1/2 Scale + 1 LSB 0 0100000000 Negative 1/2 Scale 0 0011111111 –1 V Full Scale + 1 LSB 0 0000000001 Negative Full Scale 0 0000000000 –1.002 V Negative Full Scale – 1 LSB 1 0000000000 Figure 8. PCB Top View DAC Reconstruction The AD9040A evaluation board provides an onboard AD9721 reconstruction DAC for observing the digitized analog input signal. The AD9721 is terminated into 51 ohms to provide a 1 V p-p signal at the output (RC OUTPUT). Output Data The output data bits are latched with a CMOS 74AC574 which drives a 40-pin connector (AMP p/n 102153-9). The data and clock signals are available on the connector per the pin assign- ments shown on the schematic of the evaluation board. Output data are available on the falling edge of the clock. |
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