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AD7763 Datasheet(PDF) 8 Page - Analog Devices |
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AD7763 Datasheet(HTML) 8 Page - Analog Devices |
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8 / 32 page  AD7763 Rev. 0 | Page 8 of 32 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 47 ADR1 46 ADR2 45 SH0 42 DGND 43 DGND 44 VDRIVE 48 ADR0 41 DVDD 40 SH1 39 SH2 37 RESET 36 SYNC 35 DGND 34 AGND1 33 AVDD1 38 DRDY 2 MCLKGND 3 MCLK 4 AVDD2 7 AGND1 6 AVDD1 5 AGND2 1 DGND 8 DECAPA 9 REFGND 10 VREF+ 12 AVDD4 13 AGND2 14 AVDD2 15 AVDD2 16 AGND2 11 AGND4 PIN 1 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 AD7763 TOP VIEW (Not to Scale) Figure 5. Pin Configuration Table 5. Pin Function Descriptions Pin No. Mnemonic Description 6, 33 AVDD1 Power Supply for Modulator, 2.5 V. These pins should be decoupled to AGND1 with 100 nF and 10 μF capacitors on each pin. 4, 14, 15, 27 AVDD2 Power Supply, 5 V. These pins should be decoupled to AGND2 with 100 nF capacitors on each of Pin 4, Pin 14, and Pin 15. Pin 27 should be connected to Pin 14 via an 8.2 nH inductor. 24 AVDD3 Power Supply for Differential Amplifier, 3.3 V to 5 V. This pin should be decoupled to AGND3 with a 100 nF capacitor. 12 AVDD4 Power Supply for Reference Buffer, 3.3 V to 5 V. This pin should be decoupled to AGND4 with a 10 nF capacitor in series with a 10 Ω resistor. 7, 34 AGND1 Power Supply Ground for Analog Circuitry Powered by AVDD1. 5, 13, 16, 18, 28 AGND2 Power Supply Ground for Analog Circuitry Powered by AVDD2. 23, 29, 31, 32 AGND3 Power Supply Ground for Analog Circuitry Powered by AVDD3. 11 AGND4 Power Supply Ground for Analog Circuitry Powered by AVDD4. 9 REFGND Reference Ground. Ground connection for the reference voltage. 41 DVDD Power Supply for Digital Circuitry and FIR Filter, 2.5 V. This pin should be decoupled to DGND with a 100 nF capacitor. 44, 63 VDRIVE Logic Power Supply Input, 1.8 V to 2.5 V. The voltage supplied at these pins determines the operating voltage of the logic interface. These pins must be connected together and tied to the same supply. Each pin should also be decoupled to DGND with a 100 nF capacitor. 1, 35, 42, 43, 53, 57, 59, 62, 64 DGND Ground Reference for Digital Circuitry. 19 VINA+ Positive Input to Differential Amplifier. 20 VINA− Negative Input to Differential Amplifier. 21 VOUTA− Negative Output from Differential Amplifier. 22 VOUTA+ Positive Output from Differential Amplifier. 25 VIN+ Positive Input to the Modulator. 26 VIN− Negative Input to the Modulator. 10 VREF+ Reference Input. The input range of this pin is determined by the reference buffer supply voltage (AVDD4). See the Reference Voltage Filtering section for more details. 8 DECAPA Decoupling Pin. A 100 nF capacitor must be inserted between this pin and AGND1. 30 DECAPB Decoupling Pin. A 33 pF capacitor must be inserted between this pin and AGND3. |
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