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AD7739BRU-REEL 数据表(PDF) 11 Page - Analog Devices |
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AD7739BRU-REEL 数据表(HTML) 11 Page - Analog Devices |
11 / 32 page AD7739 Rev. 0 | Page 11 of 32 CHOPPING DISABLED The second mode, in which the AD7739 is configured with chopping disabled (CHOP = 0), provides faster conversion time while maintaining high resolution. Table 7 to Table 9 show the –3 dB frequencies and typical performance versus the channel conversion time and equivalent output data rate, respectively. Table 7 shows the typical output rms noise. Table 8 shows the typical effective resolution based on the rms noise. Table 9 shows the typical output peak-to-peak resolution, representing values for which there will be no code flicker within a 6-sigma limit. The peak-to-peak resolutions are not calculated based on rms noise but on peak-to-peak noise. These typical numbers are generated from 4096 data samples acquired in continuous conversion mode with an analog input voltage set to 0 V and MCLK = 6.144 MHz. The conversion time is selected via the channel conversion time register. Table 7. Typical Output RMS Noise in µV vs. Conversion Time and Input Range with Chopping Disabled Input Range / RMS Noise (µV) FW Conversion Time Register Conversion Time (µs) Output Data Rate (Hz) –3 dB Frequency (Hz) ±2.5 V, +2.5 V ±1.25 V, +1.25 V, ±0.625 V, +0.625 V 127 0x7F 1358 737 675 2.4 1.5 92 0x5C 993 1007 950 3.0 1.8 35 0x23 399 2504 2500 4.5 2.7 16 0x10 201 4963 5400 6.9 4.1 12 0x0C 160 6257 7250 9.6 5.3 11 0x0B 149 6693 7900 11.4 6.9 3 0x03 66 15133 29000 200 90 Table 8. Typical Effective Resolution in Bits vs. Conversion Time and Input Range with Chopping Disabled Input Range / Effective Resolution (Bits) FW Conversion Time Register Conversion Time (µs) Output Data Rate (Hz) –3 dB Frequency (Hz) ±2.5 V +2.5 V ±1.25 V +1.25 V ±0.625 V +0.625 V 127 0x7F 1358 737 675 21.0 20.0 20.6 19.6 19.6 18.6 92 0x5C 993 1007 950 20.7 19.7 20.4 19.4 19.4 18.4 35 0x23 399 2504 2500 20.1 19.1 19.8 18.8 18.8 17.8 16 0x10 201 4963 5400 19.4 18.4 19.2 18.2 18.2 17.2 12 0x0C 160 6257 7250 18.9 17.9 18.8 17.8 17.8 16.8 11 0x0B 149 6693 7900 18.8 17.8 18.5 17.5 17.5 16.5 3 0x03 66 15133 29000 14.6 13.6 14.7 13.7 13.7 12.7 Table 9. Typical Peak-to-Peak Resolution in Bits vs. Conversion Time and Input Range with Chopping Disabled Input Range / Peak-to-Peak Resolution (Bits) FW Conversion Time Register Conversion Time (µs) Output Data Rate (Hz) –3 dB Frequency (Hz) ±2.5 V +2.5 V ±1.25 V +1.25 V ±0.625 V +0.625 V 127 0x7F 1358 737 675 18.2 17.2 17.8 16.8 16.8 15.8 92 0x5C 993 1007 950 17.8 16.8 17.6 16.6 16.6 15.6 35 0x23 399 2504 2500 17.2 16.2 17.0 16.0 16.0 15.0 16 0x10 201 4963 5400 16.6 15.6 16.4 15.4 15.4 14.4 12 0x0C 160 6257 7250 16.1 15.1 16.0 15.0 15.0 14.0 11 0x0B 149 6693 7900 16.0 15.0 15.7 14.7 14.7 13.7 3 0x03 66 15133 29000 11.7 10.7 12.0 11.0 11.0 10.0 |
类似零件编号 - AD7739BRU-REEL |
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类似说明 - AD7739BRU-REEL |
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