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ADE7758 数据表(PDF) 9 Page - Analog Devices |
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ADE7758 数据表(HTML) 9 Page - Analog Devices |
9 / 72 page Data Sheet ADE7758 Rev. E | Page 9 of 72 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS APCF 1 DGND 2 DVDD 3 AVDD 4 DOUT 24 SCLK 23 DIN 22 CS 21 IAP 5 CLKOUT 20 IAN 6 CLKIN 19 IBP 7 IRQ 18 IBN 8 VARCF 17 ICP 9 VAP 16 ICN 10 VBP 15 AGND 11 VCP 14 REFIN/OUT 12 VN 13 ADE7758 TOP VIEW (Not to Scale) Figure 5. Pin Configuration Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 APCF Active Power Calibration Frequency (APCF) Logic Output. It provides active power information. This output is used for operational and calibration purposes. The full-scale output frequency can be scaled by writing to the APCFNUM and APCFDEN registers (see the Active Power Frequency Output section). 2 DGND This provides the ground reference for the digital circuitry in the ADE7758, that is, the multiplier, filters, and digital-to-frequency converter. Because the digital return currents in the ADE7758 are small, it is acceptable to connect this pin to the analog ground plane of the whole system. However, high bus capacitance on the DOUT pin can result in noisy digital current that could affect performance. 3 DVDD Digital Power Supply. This pin provides the supply voltage for the digital circuitry in the ADE7758. The supply voltage should be maintained at 5 V ± 5% for specified operation. This pin should be decoupled to DGND with a 10 μF capacitor in parallel with a ceramic 100 nF capacitor. 4 AVDD Analog Power Supply. This pin provides the supply voltage for the analog circuitry in the ADE7758. The supply should be maintained at 5 V ± 5% for specified operation. Every effort should be made to minimize power supply ripple and noise at this pin by the use of proper decoupling. The Typical Performance Characteristics show the power supply rejection performance. This pin should be decoupled to AGND with a 10 μF capacitor in parallel with a ceramic 100 nF capacitor. 5, 6, 7, 8, 9, 10 IAP, IAN, IBP, IBN, ICP, ICN Analog Inputs for Current Channel. This channel is used with the current transducer and is referenced in this document as the current channel. These inputs are fully differential voltage inputs with maximum differential input signal levels of ±0.5 V, ±0.25 V, and ±0.125 V, depending on the gain selections of the internal PGA (see the Analog Inputs section). All inputs have internal ESD protection circuitry. In addition, an overvoltage of ±6 V can be sustained on these inputs without risk of permanent damage. 11 AGND This pin provides the ground reference for the analog circuitry in the ADE7758, that is, ADCs, temperature sensor, and reference. This pin should be tied to the analog ground plane or the quietest ground reference in the system. This quiet ground reference should be used for all analog circuitry, for example, antialiasing filters, current, and voltage transducers. To keep ground noise around the ADE7758 to a minimum, the quiet ground plane should be connected to the digital ground plane at only one point. It is acceptable to place the entire device on the analog ground plane. 12 REFIN/OUT This pin provides access to the on-chip voltage reference. The on-chip reference has a nominal value of 2.4 V ± 8% and a typical temperature coefficient of 30 ppm/°C. An external reference source can also be connected at this pin. In either case, this pin should be decoupled to AGND with a 1 μF ceramic capacitor. 13, 14, 15, 16 VN, VCP, VBP, VAP Analog Inputs for the Voltage Channel. This channel is used with the voltage transducer and is referenced as the voltage channels in this document. These inputs are single-ended voltage inputs with the maximum signal level of ±0.5 V with respect to VN for specified operation. These inputs are voltage inputs with maximum input signal levels of ±0.5 V, ±0.25 V, and ±0.125 V, depending on the gain selections of the internal PGA (see the Analog Inputs section). All inputs have internal ESD protection circuitry, and in addition, an overvoltage of ±6 V can be sustained on these inputs without risk of permanent damage. |
类似零件编号 - ADE7758_15 |
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类似说明 - ADE7758_15 |
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