Datenblatt-Suchmaschine für elektronische Bauteile |
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AD7777AR Datenblatt(PDF) 11 Page - Analog Devices |
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AD7777AR Datenblatt(HTML) 11 Page - Analog Devices |
11 / 12 page AD7776/AD7777/AD7778 –11– REV. 0 RTN is tied to REFOUT then the analog input range becomes 0 V to 2 V. The fixed 2 V analog input voltage span of the ADC can range from 1 V to 3 V (RTN = 0 V) to 0 V to 2 V (RTN = 2 V), i.e., with proper biasing, an input signal range from 0.3 V to 2.3 V can be covered. Both the relative accuracy and differen- tial nonlinearity performance remains essentially unchanged in this mode while the SNR and THD performance are typically 2 dB to 3 dB worse than standard. Changing the Analog Input Voltage Range By biasing the RTN pin above AGND it is possible to change the analog input voltage range from its VBIAS ± V SWING format to a more traditional 0 V to VREF range. The new input range can be described as VOFFSET to (VOFFSET + REFIN) where 0 V ≤ V OFFSET ≤ 1 V. To produce this range the RTN pin must be biased to (REFIN – 2 VOFFSET). For instance if OUTLINE DIMENSIONS Dimensions shown in inches and (mm). R-24 24-Lead Wide-Body SOIC PIN 1 0.299 (7.6) 0.291 (7.4) 13 12 1 24 0.419 (10.65) 0.394 (10.00) 0.013 (0.32) 0.009 (0.23) 0.005 (1.27) 0.015 (0.40) 0.614 (15.6) 0.598 (15.2) 0.104 (2.65) 0.093 (2.35) 0.012 (0.3) 0.004 (0.1) 0.019 (0.49) 0.014 (0.35) 0.050 (1.27) BSC R-28 28-Lead Wide-Body SOIC PIN 1 0.299 (7.60) 0.291 (7.39) 15 14 1 28 0.414 (10.52) 0.398 (10.10) 0.03 (0.76) 0.02 (0.51) 0.013 (0.32) 0.009 (0.23) 0.042 (1.067) 0.018 (0.457) 0.708 (18.02) 0.696 (17.67) 0.096 (2.44) 0.089 (2.26) 0.01 (0.254) 0.006 (0.15) 0.019 (0.49) 0.014 (0.35) 0.050 (1.27) BSC 1. LEAD NO. 1 IDENTIFIED BY A DOT. 2. SOIC LEADS WILL BE EITHER TIN PLATED OF SOLDER DIPPED IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS. |
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Ähnliche Beschreibung - AD7777AR |
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