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ADA4941-1YRZ-R7 データシート(PDF) 19 Page - Analog Devices |
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ADA4941-1YRZ-R7 データシート(HTML) 19 Page - Analog Devices |
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19 / 24 page ![]() ADA4941-1 Data Sheet Rev. D | Page 18 of 23 Table 10. Output Voltage Noise, G = 2.4 Differential Amplifier Shown in Figure 49 Noise Source Typical Value VOP Contribution (nV√Hz) VON Contribution (nV√Hz) VO, dm Contribution (nV√Hz) vn_A1 2.1 nV/√Hz 2.5 2.5 5 ip_A1 1 pA/√Hz 1 1 2 in_A1 1 pA/√Hz 1 1 2 √4 kTRF 4 nV/√Hz 4 4 8 √4 kTRG 9 nV/√Hz 1.8 1.8 3.6 √4 kTRS 3.6 nV/√Hz 4.4 4.4 8.8 vn_inverter 9.2 nV/√Hz 0 9.2 9.2 √RS_REF 0 0 0 0 ip_A2 × RS_REF 0 0 0 0 Totals 6.8 11.4 16.5 RF = 1.0 kΩ, RG = 4.99 kΩ, RS = 825 Ω, RS_REF = 0 Ω. vn_inverter = noise contributions from A2 and its associated internal 1 kΩ feedback resistors and 500 Ω offset current balancing resistor. Table 11. Output Voltage Noise, G = 2 Differential Amplifier Shown in Figure 50 Noise Source Typical Value VOP Contribution (nV√Hz) VON Contribution (nV√Hz) VO, dm Contribution (nV√Hz) vn_A1 2.1 nV/√Hz 2.1 2.1 4.2 ip_A1 0 0 0 0 in_A1 0 0 0 0 √4 kTRF 0 0 0 0 √4 kTRG 0 0 0 0 √4 kTRS 0 0 0 0 vn_inverter 9.2 nV/√Hz 0 9.2 9.2 √RS_REF 0 0 0 0 ip_A2 × RS_REF 0 0 0 0 Totals 2.1 9.4 10 RF = 0 Ω, RG = ∞, RS = 0 Ω, RS_REF = 0 Ω. Table 12. Output Voltage Noise, G = 5 Differential Amplifier Shown in Figure 51 Noise Source Typical Value VOP Contribution (nV√Hz) VON Contribution (nV√Hz) VO, dm Contribution (nV√Hz) vn_A1 2.1 nV/√Hz 5.25 5.25 10.5 ip_A1 1 pA/√Hz 1 1 2 in_A1 1 pA/√Hz 1 1 2 √4 kTRF 4 nV/√Hz 4 4 8 √4 kTRG 3.26 nV/√Hz 4.9 4.9 9.8 √4 kTRS 2.54 nV/√Hz 6.54 6.54 13.1 vn_inverter 9.2 nV/√Hz 0 9.2 9.2 √RS_REF 0 0 0 0 ip_A2 × RS_REF 0 0 0 0 Totals 10.7 14.1 23.1 RF = 1.02 kΩ, RG = 665 Ω, RS = 402 Ω, RS_REF = 0 Ω. |
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