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OPA4277PAG4 Datasheet(PDF) 10 Page - Burr-Brown (TI) |
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OPA4277PAG4 Datasheet(HTML) 10 Page - Burr-Brown (TI) |
10 / 25 page OPA277, OPA2277, OPA4277 10 SBOS079A www.ti.com R 1 V– 1/2 OPA2277 R 2 1/2 OPA2277 V OUT = (V1 – V2)(1 + ) R 2 R 1 V+ V+ V– R 2 For integrated solution see: INA126, INA2126 (dual) INA125 (on-board reference) INA122 (single-supply) R 1 Load Cell R+ ∆R V 2 R– ∆R R– ∆R R+ ∆R V 1 14 1 12 5V 11 13 I REG ∼ 1mA 4 3 2 6 R G 1250 Ω XTR105 1/2 OPA2277 7 R G R G V IN – V IN + V REG I R2 V+ I RET I O E B 8 I O = 4mA + (VIN – VIN) + – 40 R G 9 10 R F 10k Ω R 412 Ω 1/2 OPA2277 V+ V– Type J 25 Ω (G = 1 + = 50) 2R F R 50 Ω 1k Ω R F 10k Ω I R1 V LIN R CM = 1250Ω 0.01µF FIGURE 3. Load Cell Amplifier. FIGURE 4. Thermocouple Low Offset, Low Drift Loop Measurement with Diode Cold Junction Compensation. |
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