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INA148 Datasheet(PDF) 11 Page - Texas Instruments |
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INA148 Datasheet(HTML) 11 Page - Texas Instruments |
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11 / 16 page ![]() 11 ® INA148 FIGURE 6. Quasi-AC-Coupled Differential Amplifier. FIGURE 7. Single-Supply Differential Amplifier. FIGURE 8. Battery Monitor Circuit. 1M Ω 50k Ω 52.6316k Ω 50k Ω 2.7778k Ω 1M Ω –V S V IN 4 3 2 6 A1 INA148 V O + V IN – 0.22 µF 1 V REF +V S –V S +V S 7 U2: OPA132 for V S = ±5V to ±15V OPA340 for V S = ±2.5 1M Ω U1 f C ≅ 0.75 Hz HPF 2 3 U2 4 7 6 V O = (VIN – VIN) + VREF – + 1M Ω 50k Ω 52.6316k Ω 50k Ω 2.7778k Ω 1M Ω V IN 3 2 6 41 A1 INA148 V O +5V + V IN – 7 0.1 µF +5V V CM = –23V to +56V V O = (VIN – VIN) + 1.235V REF1004-1.2 10 µF 5 Ω 34k Ω +– + 1M Ω 50k Ω 52.6316k Ω 50k Ω 2.7778k Ω 1M Ω 3 2 6 1 A1 INA148 REF1004-1.2 10 µF 5 Ω 7 0.1 µF 4 0.01 Ω + + – 28V Supply I C 271k Ω V O = 1.235V + (IC • RS) R S |
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