Zakładka z wyszukiwarką danych komponentów |
|
ADE7761AARSZ-RL Arkusz danych(PDF) 11 Page - Analog Devices |
|
ADE7761AARSZ-RL Arkusz danych(HTML) 11 Page - Analog Devices |
11 / 24 page ADE7761A Rev. 0 | Page 11 of 24 OPERATION POWER SUPPLY MONITOR The ADE7761A continuously monitors the power supply (VDD) with its on-chip, power supply monitor. If the supply is less than 4 V ± 5%, the ADE7761A goes into an inactive state, that is, no energy is accumulated and the CF, F1, and F2 outputs are disabled. This is useful to ensure correct device operation at power-up and during power-down. The power supply monitor has built-in hysteresis and filtering, which provides a high degree of immunity to false triggering due to noisy supplies. The power supply and decoupling for the part should be such that the ripple at VDD does not exceed 5 V ± 5% as specified for normal operation. ADE7761A REVP - FAULT - CF - F1 - F2 OUTPUTS INACTIVE ACTIVE TIME INACTIVE VDD 5V 4V 0V Figure 11. On-Chip, Power Supply Monitoring ANALOG INPUTS Channel V1 (Current Channel) The voltage outputs from the current transducers are connected to the ADE7761A at Channel V1. It has two voltage inputs, V1A and V1B. These inputs are fully differential with respect to V1N. However, at any one time, only one is selected to perform the power calculation (see the Fault Detection section). The maximum peak differential signal on V1A − V1N and V1B − V1N is ±660 mV. However, Channel 1 has a programmable gain amplifier (PGA) with user-selectable gains of 1 or 16 (see Table 5). This gain facilitates easy transducer interfacing. Table 5. Channel 1 Dynamic Range PGA Gain Maximum Differential Signal (mV) 0 1 660 1 16 41 Figure 12 shows the maximum signal levels on V1A, V1B, and V1N. The maximum differential voltage is ±660 mV divided by the gain selection. The differential voltage signal on the inputs must be referenced to a common mode (usually AGND). VCM DIFFERENTIAL INPUT B ±660mV MAX PEAK V1B V1N V1A V1 V1 VCM COMMON MODE ±100mV MAX DIFFERENTIAL INPUT A ±660mV MAX PEAK AGND V1A, V1B +660mV GAIN –660mV GAIN + VCM + VCM Figure 12. Maximum Signal Levels, Channel 1 Channel V2 (Voltage Channel) The output of the line voltage transducer is connected to the ADE7761A at this analog input. Channel V2 is a single-ended, voltage input. The maximum peak differential signal on Channel 2 is ±660 mV with respect to V2N. Figure 13 shows the maximum signal levels that can be connected to Channel 2. VCM +660mV + VCM –660mV + VCM COMMON MODE ±100mV MAX V2N V2P VCM V2 DIFFERENTIAL INPUT ±660mV MAX PEAK V2 Figure 13. Maximum Signal Levels, Channel 2 The differential voltage V2P − V2N must be referenced to a common mode (usually AGND). The analog inputs of the ADE7761A can be driven with common-mode voltages of up to 100 mV with respect to AGND. However, the best results are achieved using a common mode equal to AGND. MISCAL Input The input for the power calibration in missing neutral mode is connected to the ADE7761A at this analog input. MISCAL is a single-ended, voltage input. It is recommended to use a dc signal derived from the voltage reference to drive this pin. The maximum peak differential signal on MISCAL is 660 mV with respect to V2N. Figure 14 shows the maximum signal levels that can be connected to the MISCAL pin. VCM +660mV + VCM COMMON MODE ±100mV MAX V2N MISCAL VCM MISCAL DIFFERENTIAL INPUT ±660mV MAX PEAK MISCAL AGND Figure 14. Maximum Signal Levels, MISCAL |
Podobny numer części - ADE7761AARSZ-RL |
|
Podobny opis - ADE7761AARSZ-RL |
|
|
Link URL |
Polityka prywatności |
ALLDATASHEET.PL |
Czy Alldatasheet okazała się pomocna? [ DONATE ] |
O Alldatasheet | Reklama | Kontakt | Polityka prywatności | Linki | Lista producentów All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |