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BA2904YF-C Datasheet(PDF) 9 Page - Rohm |
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BA2904YF-C Datasheet(HTML) 9 Page - Rohm |
9 / 17 page Technical Note 9/16 BA2904YF-C,BA2904YFVM-C,BA2902YF-C,BA2902YFV-C www.rohm.com 2011.08 - Rev.B © 2011 ROHM Co., Ltd. All rights reserved. ● Circuit Diagram ● Test circuit1 NULL method VCC,VEE,EK,Vicm Unit:[V] Parameter VF S1 S2 S3 BA2904Y family BA2902Y family calculation Vcc VEE EK Vicm Input Offset Voltage VF1 ON ON OFF 5~30 0 -1.4 0 1 Input Offset Current VF2 OFF OFF OFF 5 0 -1.4 0 2 Input Bias Current VF3 OFF ON OFF 5 0 -1.4 0 3 VF4 ON OFF Large Signal Voltage Gain VF5 ON ON ON 15 0 -1.4 0 4 VF6 15 0 -11.4 0 Common-mode Rejection Ratio (Input common-mode Voltage Range) VF7 ON ON OFF 5 0 -1.4 0 5 VF8 5 0 -1.4 3.5 Power Supply Rejection Ratio VF9 ON ON OFF 5 0 -1.4 0 6 VF10 30 0 -1.4 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 Ration (CMRR) 6. Power supply rejection ratio (PSRR) Fig. 49 Schematic Diagram (one channel only) Fig. 50 Test circuit1 (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[kΩ] S1 Ri Rs 10[kΩ] 50[Ω] 10[kΩ] 50[Ω] Ri Rs S2 RL S3 1000[pF] C3 500[kΩ] 500[kΩ] 0.1[μF] RK EK RK C1 +15[V] -15[V] NULL V VF DUT VEE Vicm BA2904Y / BA2902Y Schematic Diagram +IN -IN VOUT VCC VEE |
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