Bidirectional, Zero-Drift, Current Sense Amplifier
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18 /6 — AD8418A. Data Sheet. TYPICAL PERFORMANCE CHARACTERISTICS. 100. ) V. (µ E. …
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AD8418A. Data Sheet. TYPICAL PERFORMANCE CHARACTERISTICS. 100. ) V. (µ E. LTAG. ( –10. GA –20. SET F F O. –30. –40. –50. –60. –40 –25 –10. 110 125. 10k
AD8418AData SheetTYPICAL PERFORMANCE CHARACTERISTICS1004090308020) V7010(µ E60)0dBLTAG50( –10INVO40GA –20SET F F O30–3020–4010–500 3 –60 6 –40 –25 –105203550658095110 125 0 00 1k10k100k1M10M -0 3- 3 TEMPERATURE (°C)FREQUENCY (Hz) 88 1188 11 Figure 4. Typical Offset Drift vs. Temperature Figure 7. Typical Small Signal Bandwidth (VOUT = 200 mV p-p) 110201810016) (% 1490R12B)RRO(dE 10R80UTRP T8CMU O670L TA4TO602050 4 –2101001k10k100k1M -00 0510152025303540 007 83- FREQUENCY (Hz) 11883 DIFFERENTIAL INPUT VOLTAGE (mV) 118 Figure 5. Typical CMRR vs. Frequency Figure 8. Total Output Error vs. Differential Input Voltage 4000.5NORMALIZED AT 25°CVS = 5V0.4300A)0.3(m200IN)P0.2+IN/V V 100UT(µP0.1RIN R–IN0E0RROPE NNT –0.1–100EAI G–0.2URR–200C–0.3AS BI–300–0.4–400 5 –0.5–40 –25 –105203550658095110 125 0 08 0 –4 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 1 3- 3- TEMPERATURE (°C) 88 V 88 11 CM (V) 11 Figure 6. Typical Gain Error vs. Temperature Figure 9. Bias Current per Input Pin vs. Common-Mode Voltage (VCM) Rev. E | Page 6 of 18 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OUTPUT OFFSET ADJUSTMENT UNIDIRECTIONAL OPERATION Ground Referenced Output Mode VS Referenced Output Mode BIDIRECTIONAL OPERATION EXTERNAL REFERENCED OUTPUT SPLITTING THE SUPPLY SPLITTING AN EXTERNAL REFERENCE APPLICATIONS INFORMATION MOTOR CONTROL 3-Phase Motor Control H-Bridge Motor Control SOLENOID CONTROL High-Side Current Sense with a Low-Side Switch High-Side Current Sense with a High-Side Switch High Rail Current Sensing PINOUT OPTION ENGINEERED FOR FMEA OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS