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AD9712BBP Datasheet(PDF) 4 Page - Analog Devices |
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AD9712BBP Datasheet(HTML) 4 Page - Analog Devices |
4 / 12 page AD9712B/AD9713B REV. B –4– PIN DESCRIPTIONS Pin # Name Function 1–10 D2–D11 Ten bits of twelve-bit digital input word. 11 D12 (LSB) Least Significant Bit (LSB) of digital input word. Input Coding vs. Current Output Input Code D1–D12 IOUT (mA) IOUT (mA) 1111111111 –20.475 0 0000000000 0 –20.475 12 DIGITAL –VS One of two negative digital supply pins; nominally –5.2 V. 13 ANALOG RETURN Analog ground return. This point and the reference side of the DAC load resistors should be connected to the same potential (nominally ground). 14 IOUT Analog current output; full-scale output occurs with digital inputs at all “1.” 15 ANALOG –VS One of two negative analog supply pins; nominally –5.2 V. 16 IOUT Complementary analog current output; zero scale output occurs with digital inputs at all “1.” 17 REFERENCE IN Normally connected to CONTROL AMP OUT (Pin 18). Direct line to DAC current source network. Voltage changes at this point have a direct effect on the full-scale output value of unit. Full-scale current output = 128 (Reference voltage/RSET) when using internal amplifier. 18 CONTROL AMP OUT Normally connected to REFERENCE INPUT (Pin 17). Output of internal control amplifier, which provides a temperature-compensated drive level to the current switch network. 19 CONTROL AMP IN Normally connected to REFERENCE OUT (Pin 20) if not connected to external reference. 20 REFERENCE OUT Normally connected to CONTROL AMP IN (Pin 19). Internal voltage reference, nominally –1.18 V. 21 DIGITAL –VS One of two negative digital supply pins; nominally –5.2 V. 22 REFERENCE GROUND Ground return for the internal voltage reference and amplifier. 23 DIGITAL +VS Positive digital supply pin, used only on the AD9713B; nominally +5 V. No connection to this pin on AD9712B. 24 RSET Connection for external resistance reference. Full-scale current out = 128 (Reference voltage/ RSET) when using internal amplifier. Nominally 7.5 k Ω. 25 ANALOG –VS One of two negative analog supply pins; nominally –5.2 V. 26 LATCH ENABLE Transparent latch control line. Register is transparent when LATCH ENABLE is LOW. 27 DIGITAL GROUND Digital ground return. 28 D1 (MSB) Most Significant Bit (MSB) of digital input word. PIN CONFIGURATIONS PLCC/LCC ANALOG –VS R SET DIGITAL +VS REFERENCE GROUND DIGITAL –VS REFERENCE OUT CONTROL AMP IN D 6 D 9 D 8 D 7 D11 D10 AD9712B AD9713B (Not to Scale) TOP VIEW 5 6 7 8 9 10 11 28 27 26 1 2 3 4 25 24 23 22 21 20 19 12 13 14 15 16 17 18 D (LSB) 12 DIP D 6 D9 D8 D7 D11 D10 D12 (LSB) D 5 D3 D4 D 2 ANALOG RETURN IOUT DIGITAL –VS D1 (MSB0) DIGITAL GROUND LATCH ENABLE RSET REFERENCE GROUND REFERENCE OUT CONTROL AMP IN I OUT REFERENCE IN CONTROL AMP OUT ANALOG –VS DIGITAL +VS DIGITAL –VS ANALOG –VS 1 2 3 7 28 27 26 22 8 9 10 21 20 19 11 12 18 17 4 5 25 24 6 23 TOP VIEW (Not to Scale) 13 14 16 15 AD9712B AD9713B |
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