Datasheet NJU7890 (New Japan Radio) - 5
| Hersteller | New Japan Radio |
| Beschreibung | 1000V High Voltage Monitor IC |
| Seiten / Seite | 19 / 5 — NJU7890. PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE. ■ Calculation of … |
| Dateiformat / Größe | PDF / 2.8 Mb |
| Dokumentensprache | Englisch |
NJU7890. PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE. ■ Calculation of output voltage. V-HVIN. -HVIN. +200V. 200V. OUT. VOUT. OP OUT
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NJU7890 PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE ■ Calculation of output voltage
ห5V - V+ห |V V +HVIN| OUT = (V+HVIN - VିHVIN) × ATT + VREF + VOS-RTO + +
SVR1 CMR1
Calculation example V+HVIN = −100V, V−HVIN = 200V, VREF = 4V, V+ = 5.2V, ATT = 1/205±0.7% (Ta = 25°C), VOS-RTO = 0.3mV, SVR1 = 70dB, CMR1 = 85dB 1 |-0.2V| |-100V| VOUT = (-100V - 200V) × ൬ ±0.7%൰ + 4V + 0.3mV + + 205 70dB 85dB 1 VOUT = -300V × ൬ ±0.7%൰ + 4V + 0.3mV + 0.06mV + 5.6mV = 2.553V 205 Without the error component of the calculation example above, the output voltage is 2.537V. The error 0.016V obtained from the calculation example is 0.016V × (1 ÷ ATT) = 3.280 V by calculating the input conversion. The error rate obtained from the input conversion value can be calculated as 1.09% from 3.280V ÷ 300V. In addition to the above formula, please be aware that there is a VREF error (accuracy influence). Evaluation circuit example
V-HVIN -HVIN V- +200V 200V OUT VOUT V+ V OP OUT -OPIN 5V Δ300 +OPIN 100V V- REF V V REF -+HVIN V- 4V -100V +HVIN
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ห5V - V+ห |V V +HVIN| OUT = (V+HVIN - VିHVIN) × ATT + VREF + VOS-RTO + +
SVR1 CMR1
Calculation example V+HVIN = −100V, V−HVIN = 200V, VREF = 4V, V+ = 5.2V, ATT = 1/205±0.7% (Ta = 25°C), VOS-RTO = 0.3mV, SVR1 = 70dB, CMR1 = 85dB 1 |-0.2V| |-100V| VOUT = (-100V - 200V) × ൬ ±0.7%൰ + 4V + 0.3mV + + 205 70dB 85dB 1 VOUT = -300V × ൬ ±0.7%൰ + 4V + 0.3mV + 0.06mV + 5.6mV = 2.553V 205 Without the error component of the calculation example above, the output voltage is 2.537V. The error 0.016V obtained from the calculation example is 0.016V × (1 ÷ ATT) = 3.280 V by calculating the input conversion. The error rate obtained from the input conversion value can be calculated as 1.09% from 3.280V ÷ 300V. In addition to the above formula, please be aware that there is a VREF error (accuracy influence). Evaluation circuit example
V-HVIN -HVIN V- +200V 200V OUT VOUT V+ V OP OUT -OPIN 5V Δ300 +OPIN 100V V- REF V V REF -+HVIN V- 4V -100V +HVIN
Ver.0.0 - 5 - www.njr.com