поискавой системы для электроныых деталей |
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AD8250ARZ-R7 датащи(PDF) 7 Page - Analog Devices |
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AD8250ARZ-R7 датащи(HTML) 7 Page - Analog Devices |
7 / 8 page Preliminary Technical Data AD8250 Rev. PrB| Page 7 of 8 PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS AD8250 TOP VIEW (Not to Scale) -IN 1 DGND 2 -VS 3 A0 4 A1 5 +IN VREF +VS VOUT WR 10 9 8 7 6 Figure 4. 10-Lead MSOP Table 3. Pin Function Descriptions— 10-Lead MSOP(ARM PACKAGE) Pin No. Name Description 1 -IN Inverting Input Terminal (True differential input) 2 DGND Digital Ground. 3 -Vs Negative Supply Terminal 4 A0 Gain Setting Pin (LSB) 5 A1 Gain Setting Pin (MSB) 6 WR Write Enable 7 VOUT Output Terminal 8 +Vs Positive Supply Terminal 9 VREF Reference Voltage Terminal (drive this pin with a low impedance voltage source to level shift the output signal) 10 +IN Non-inverting Input Terminal (True differential input) GAIN SETTING The AD8250’s gains are set digitally. The A0 and A1 pins must be set either HIGH or LOW with respect to digital ground, DGND. The WR pin is a tri-state switch. It may be set to one of three levels, HIGH, LOW or to –VS. A HIGH signal is typically greater than 4V but less than 6V and a LOW signal is typically less than 1V but higher than DGND, 0V. Gains can be programmed using the following methods: TRANSPARENT GAIN SETTING MODE: In this mode, the gain is set by toggling A0 and A1 to HIGH or LOW. To enable transparent mode, tie WR to –Vs. This configures the AD8250 to change gains when A0 and A1 are set according to Table 4. Table 4. . Transparent Mode Gain Settings G WR A1 A0 1 -Vs LO LO 2 -Vs LO HI 5 -Vs HI LO 10 -Vs HI HI WRITE ENABLE GAIN SETTING MODE: In this mode, the gains are changed only during the negative edge of the WR strobe. So for instance, the gain is determined by the two bit value held on A0 and A1 at the time the WR strobe transitions from HIGH to LOW. tWR-LO tWR-HI tSU tHD WR A0, A1 Table 5. : Write Enable Mode Gain Settings Gain (changes to) WR A1 A0 1 HI -> LO LO LO 2 HI -> LO LO HI 5 HI -> LO HI LO 10 HI -> LO HI HI No Change LO->LO X X No Change LO->HI X X No Change HI-> HI X X X = don’t care . |
Аналогичный номер детали - AD8250ARZ-R7 |
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Аналогичное описание - AD8250ARZ-R7 |
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