MAX40056F/MAX40056T/ Bidirectional Current Sense MAX40056U Amplifier with PWM-Rejection Electrical Characteristics (continued) (VDD = 3.3V, VCM = 48V, VSENSE = 20mV, OUT loading = 10kΩ and 20pF to GND, COP loading = 5kΩ and 10pF to GND, TMIN = -40°C, TMAX = 125°C, (Note 1)) PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS Amplifier Small-Signal t Settling Time (1%) S ±200mV output step 2.5 µs PWM Edge Recovery 0V to 50V edges: 500V/μs rise/fall times, t 500 ns Settling Time S_PWM VSENSE = 0mV (VRS+ = VRS-) AC Common Mode AC CMRR 100mV Rejection Ratio AC Sine, f = 100kHz 70 dB AC Power Supply AC PSRR 100mV Rejection Ratio AC Sine, f = 100kHz 53 dB Voltage Noise Density en At 10kHz 150 nV/√Hz INTERNAL REFERENCE REF Output Voltage VREF No load; -40°C ≤ TA ≤ +125°C 1.485 1.5 1.515 V REF Thermal Drift TCVREF 30 ppm/°C REF Load Regulation ΔVREF/ΔIREF 0µA ≤ external load ≤ 500µA 30 70 µV/µA REF Line Regulation ΔVREF/ΔVDD 2.7V ≤ VDD ≤ 5.5V 0.1 0.5 mV/V REF Cap Loading No sustained oscillation 1 µF Internal\External External reference is enabled by Reference Switching VREF_TH 1.65 1.75 V overdriving Threshold Voltage INTERNAL COMPARATOR CIP Input Resistance RCIP Resistance appears to be to VREF 10 GΩ MIN (V CIP Input Common REF - V 0.08, V Mode Range CIP_IN 0.08 VDD - 1.25) 80mV ≤ VCIP ≤ min Input Offset Voltage VOS_CMP 10 mV (VREF - 80mV, VDD - 1.25V) 80mV ≤ VCIP ≤ min Hysteresis VHYS 40 mV (VREF - 80mV, VDD - 1.25V) COP Output Voltage V Swing High OH_CMP Sourcing 2mA; VOH_CMP = VDD - VCOP 0.12 0.3 V COP Output Voltage V Swing Low OL-CMP Sinking 4mA; VOL_CMP = VCOP - GND 0.12 0.3 V tPDL->H 200mV overdrive, low-to-high 14 Propagation Delay µs tPDH->L 200mV overdrive, high-to-low 12 Note 1: Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Note 2: Guaranteed by design and bench characterization. www.maximintegrated.com Maxim Integrated | 4 Document Outline General Description Applications Benefits and Features Typical Operating Characteristic and Simplified Block Diagram Absolute Maximum Ratings Package Information 8 µMAX 8 WLP Electrical Characteristics Typical Operating Characteristics Pin Configuration Pin Description Detailed Description Overview PWM Rejection Input Stage Low Input Offset Voltage and Low Gain Error CSA Output Voltage Reference Window Comparator and Hysteresis Applications Information Input Sense Voltage Range Choice of Reference Voltage Important Considerations Kelvin Connections Stray Inductance Typical Application Circuits Current Sensing in a 3-Phase Servo Motor Ordering Information Revision History
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