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LDC0851 Datasheet(PDF) 7 Page - Texas Instruments |
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LDC0851 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 39 page Target Distance to LSENSE Coil (% of coil diameter) 0 20 40 60 80 100 100 120 140 160 180 200 220 240 D005 dcoil = 29 mm dcoil = 15 mm dcoil = 6 mm Target Distance to LSENSE Coil (% of coil diameter) 0 20 40 60 80 100 0 10 20 30 40 50 60 70 80 90 100 D006 dcoil = 29 mm dcoil = 15 mm dcoil = 6 mm Target Distance to LREF Coil (% of coil diameter) 0 20 40 60 80 0 20 40 60 80 100 120 D003 Switch ON (dcoil = 6 mm) Switch ON (dcoil = 15 mm) Switch ON (dcoil = 29 mm) Switch OFF (dcoil = 6 mm) Switch OFF (dcoil = 15 mm) Switch OFF (dcoil = 29 mm) ADJ Code 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 10 20 30 40 50 60 70 80 D004 Switch ON (dcoil = 6 mm) Switch ON (dcoil = 15 mm) Switch ON (dcoil = 29 mm) Switch OFF (dcoil = 6 mm) Switch OFF (dcoil = 15 mm) Switch OFF (dcoil = 29 mm) Target Distance to LREF Coil (mm) 1 2 3 4 5 6 7 8 0 2 4 6 8 10 12 D001 Switch ON Switch OFF ADJ Code 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0.5 1 1.5 2 2.5 3 3.5 4 D002 Switch ON Switch OFF 7 LDC0851 www.ti.com SNOSCZ7A – DECEMBER 2015 – REVISED JANUARY 2016 Product Folder Links: LDC0851 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated 7.8 Typical Characteristics Common test conditions (unless specified otherwise): VDD = 3.3 V, Sense coil diameter = reference coil diameter, Target: Aluminum, 1.5 mm thickness, Target area / Coil area > 100% Basic Operation Mode ADJ Code = 0 Coil diameter = 10 mm Figure 3. Switching Distance vs. LREF Target Distance Threshold Adjust Mode No reference target Coil diameter = 10 mm Figure 4. Switching Distance vs. ADJ code Basic Operation Mode ADJ Code = 0 Coil diameter = 6 mm, 15 mm, 29 mm Figure 5. Normalized Switching Distance vs. LREF Target Distance Threshold Adjust Mode No reference target Coil diameter = 6 mm, 15 mm, 29 mm Figure 6. Normalized Switching Distance vs. ADJ Code LSENSE frequency (fs) varied LREF frequency (fr) fixed Figure 7. Frequency vs. Distance LSENSE inductance (Ls) varied LREF inductance (Lr) fixed Figure 8. Inductance vs. Distance |
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