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AD9049BRS Arkusz danych(PDF) 4 Page - Analog Devices |
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AD9049BRS Arkusz danych(HTML) 4 Page - Analog Devices |
4 / 12 page AD9049 REV. A –4– Table I. AD9049 Digital Coding (Single Ended Input AIN, AINB Bypassed to GND) Digital Output Analog Input Voltage Level MSB . . . LSB Digital Output 3.810 Positive Full Scale 111111111 3.300 Midscale 011111111 2.790 Negative Full Scale 000000000 PIN DESCRIPTIONS Pin No Name Function 1, 7, 12, 21, 23 GND Ground. 2, 8, 11 VD Analog +5 V ± 5% power supply. 3 VREFOUT Internal bandgap voltage reference (nominally +2.5 V). 4 VREFIN Input to reference amplifier. Voltage reference for ADC is connected here. 5 COMP Internal compensation pin, 0.1 µF bypass connected here to V D (+5 V). 6 REFBP External connection for (0.1 µF) reference bypass capacitor. 9 AINB Complementary analog input pin (Analog input bar). 10 AIN Analog input pin. 13 ENCODE Encode clock input to ADC. Internal T/H is placed in hold mode (ADC is encoding) on rising edge of encode signal. 14 NC Not internally connected. 15 D8 (MSB) Most significant bit of ADC output. 16–19 D7–D4 Digital output bits of ADC. 20, 22 VDD Digital output power supply (only used by digital outputs). 24–26 D3–D1 Digital output bits of ADC. 27 D0 (LSB) Least significant bit of ADC output. 28 NC Not internally connected. PIN CONNECTIONS 14 13 12 11 10 9 8 1 2 3 4 7 6 5 17 16 15 20 19 18 28 27 26 25 24 23 22 21 TOP VIEW (Not to Scale) AD9049 GND D2 D1 D0 (LSB) NC VD VREFOUT VREFIN VDD GND D3 COMP REFBP GND VD AINB AIN D4 VDD GND VD GND ENCODE NC D5 D8 (MSB) D7 D6 NC = NO CONNECT WARNING! ESD SENSITIVE DEVICE CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD9049 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. |
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