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AD7705BRU Datasheet(PDF) 9 Page - Analog Devices |
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AD7705BRU Datasheet(HTML) 9 Page - Analog Devices |
9 / 32 page AD7705/AD7706 –9– REV. A Typical Performance Characteristics– READING NO. 32763 0 100 32764 32765 32766 32767 32768 32769 32770 32771 200 300 400 500 600 700 800 900 1000 VDD = 5V VREF = 2.5V GAIN = 128 50Hz UPDATE RATE TA = +25 C RMS NOISE = 600nV Figure 2. Typical Noise Plot @ Gain = 128 with 50 Hz Update Rate FREQUENCY – MHz 0.4 VDD = 3V TA = +25 C 1.2 1.0 0.8 0.6 0.4 0.2 0 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 BUFFERED MODE, GAIN = 128 UNBUFFERED MODE, GAIN = 1 UNBUFFERED MODE, GAIN = 128 BUFFERED MODE, GAIN = 1 Figure 3. Typical IDD vs. MCLKIN Frequency @ 3 V GAIN 1 VDD = 3V EXTERNAL MCLK CLKDIS = 1 TA = +25 C 1.0 0.8 0.6 0.4 0.2 0 0.1 0.3 0.5 0.7 0.9 2 4 8 16 32 64 128 BUFFERED MODE fCLK = 5MHz, CLKDIV = 1 BUFFERED MODE fCLK = 1MHz, CLKDIV = 0 BUFFERED MODE fCLK = 2.4576MHz, CLKDIV = 0 UNBUFFERED MODE fCLK = 2.84MHz, CLKDIV = 0 UNBUFFERED MODE fCLK = 1MHz, CLKDIV = 0 UNBUFFERED MODE fCLK = 5MHz, CLKDIV = 1 Figure 4. Typical IDD vs. Gain and Clock Frequency @ 3 V CODE 32764 400 0 32765 32766 32767 32768 32769 32770 300 200 100 Figure 5. Histogram of Data in Figure 2 FREQUENCY – MHz 0.4 VDD = 5V TA = +25 C 1.2 1.0 0.8 0.6 0.4 0.2 0 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 BUFFERED MODE, GAIN = 128 UNBUFFERED MODE, GAIN = 1 UNBUFFERED MODE, GAIN = 128 BUFFERED MODE, GAIN = 1 Figure 6. Typical IDD vs. MCLKIN Frequency @ 5 V GAIN 1 VDD = 5V EXTERNAL MCLK CLKDIS = 1 TA = +25 C 1.2 0.8 0.6 0.4 0.2 0 1.0 24 8 16 32 64 128 BUFFERED MODE fCLK = 5MHz, CLKDIV = 1 BUFFERED MODE fCLK = 1MHz, CLKDIV = 0 BUFFERED MODE fCLK = 2.4576MHz, CLKDIV = 0 UNBUFFERED MODE fCLK = 2.4576MHz, CLKDIV = 0 UNBUFFERED MODE fCLK = 1MHz, CLKDIV = 0 UNBUFFERED MODE fCLK = 5MHz, CLKDIV = 1 Figure 7. Typical IDD vs. Gain and Clock Frequency @ 5 V |
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