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BA3472F 데이터시트(PDF) 5 Page - Rohm |
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BA3472F 데이터시트(HTML) 5 Page - Rohm |
5 / 10 page BA3472F,BA3472FV,BA3472FVM Technical Note 5/9 www.rohm.com 2009.11 - Rev.B © 2009 ROHM Co., Ltd. All rights reserved. ●Schematic diagram ●Test circuit1 NULL method VCC,VEE,EK,Vicm Unit : [V] Parameter VF S1 S2 S3 BA3472 family Calculation VCC VEE EK Vicm Input Offset Voltage VF1 ON ON OFF 15 -15 0 0 1 Input Offset Current VF2 OFF OFF OFF 15 -15 0 0 2 Input Bias Current VF3 OFF ON OFF 15 -15 0 0 3 VF4 ON OFF Large Signal Voltage Gain VF5 ON ON ON 15 -15 +10 0 4 VF6 15 -15 -10 0 Common-mode Rejection Ratio (Input Common-mode Voltage Range) VF7 ON ON OFF 15 -15 0 -15 5 VF8 15 -15 0 13 Power Supply Rejection Ratio VF9 ON ON OFF 2 -2 0 0 6 VF10 18 -18 0 0 -Calculation- 1. Input Offset Voltage (Vio) 2. Input Offset Current (Iio) 3. Input Bias Current (Ib) 4. Large Signal Voltage Gain (Av) 5. Common-mode Rejection Ratio (CMRR) 6. Power Supply Rejection Ratio (PSRR) VCC VIN- VIN+ VEE VOUT Fig24. Schematic diagram (one channel only) Fig.25 Test circuit 1 (one channel only) | VF1 | Vio = 1 + Rf / Rs [V] | VF2 -VF1 | Iio = Ri ×(1 + Rf / Rs) [A] | VF4 -VF3 | Ib = 2×Ri× (1 + Rf / Rs) [A] ΔEK×(1+Rf /Rs) Av = 20×Log |VF5-VF6| [dB] ΔVicm×(1+Rf /Rs) CMRR = 20×Log |VF8-VF7| [dB] ΔVcc×(1+Rf /Rs) PSRR = 20×Log |VF10-VF9| [dB] VCC C2 0.1[ μF] Rf 50[k Ω] S1 Ri Rs 10[k Ω] 50[ Ω] 10[k Ω] 50[ Ω] Ri Rs S2 RL S3 1000[pF] C3 500[k Ω] 500[k Ω] 0.1[ μF] RK EK RK C1 +15[V] -15[V] NULL V VF DUT VEE Vicm |
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