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AD7730L Datasheet(PDF) 11 Page - Analog Devices |
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AD7730L Datasheet(HTML) 11 Page - Analog Devices |
11 / 52 page AD7730/AD7730L REV. A –11– Table III. Output Noise vs. Input Range and Update Rate (CHP = 0) Typical Output RMS Noise in nV Output –3 dB SF Settling Time Settling Time Input Range Input Range Input Range Input Range Data Rate Frequency Word Normal Mode Fast Mode = 80 mV = 40 mV = 20 mV = 10 mV 150 Hz 5.85 Hz 2048 166 ms 26.6 ms 160 110 80 60 200 Hz 7.8 Hz 1536 125 ms 20 ms 190 130 95 75 300 Hz 11.7 Hz 1024 83.3 ms 13.3 ms 235 145 100 80 600 Hz 23.4 Hz 512 41.6 ms 6.6 ms 300 225 135 110 1200 Hz 46.8 Hz 256 20.8 ms 3.3 ms 435 315 210 150 Table IV. Peak-to-Peak Resolution vs. Input Range and Update Rate (CHP = 0) Peak-to-Peak Resolution in Counts (Bits) Output –3 dB SF Settling Time Settling Time Input Range Input Range Input Range Input Range Data Rate Frequency Word Normal Mode Fast Mode = 80 mV = 40 mV = 20 mV = 10 mV 150 Hz 5.85 Hz 2048 166 ms 26.6 ms 165k (17.5) 120k (17) 80k (16.5) 55k (16) 200 Hz 7.8 Hz 1536 125 ms 20 ms 140k (17) 100k (16.5) 70k (16) 45k (15.5) 300 Hz 11.7 Hz 1024 83.3 ms 13.3 ms 115k (17) 90k (16.5) 65k (16) 40k (15.5) 600 Hz 23.4 Hz 512 41.6 ms 6.6 ms 90k (16.5) 60k (16) 50k (15.5) 30k (15) 1200 Hz 46.8 Hz 256 20.8 ms 3.3 ms 60k (16) 43k (15.5) 32k (15) 20k (14.5) ON-CHIP REGISTERS The AD7730 contains thirteen on-chip registers which can be accessed via the serial port of the part. These registers are summarized in Figure 4 and in Table V and described in detail in the following sections. COMMUNICATIONS REGISTER STATUS REGISTER DATA REGISTER MODE REGISTER FILTER REGISTER DAC REGISTER OFFSET REGISTER (x3) GAIN REGISTER (x3) TEST REGISTER RS2 RS1 RS0 DIN DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DIN DIN DIN DIN DIN DIN DIN DOUT REGISTER SELECT DECODER Figure 4. Register Overview |
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