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INA240 Datasheet(PDF) 1 Page - Texas Instruments |
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INA240 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 36 page + Supply (2.7 V to 5.5 V) IN+ IN± REF2 REF1 OUT Time (2 µs/div) -30 -1.5 0 -1 30 -0.5 60 0 90 0.5 120 1 150 1.5 180 2 210 2.5 240 3 270 3.5 D004 270 Y1 240 210 180 150 3.50 Y1 3 2.5 2 1.5 Common-Mode Step INA240 OUT Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. INA240 SBOS662A – JULY 2016 – REVISED OCTOBER 2016 INA240 High- and Low-Side, Bidirectional, Zero-Drift, Current-Sense Amplifier with Enhanced PWM Rejection 1 1 Features 1 • Enhanced PWM Rejection • Excellent CMRR: – 132-dB DC CMRR – 93-dB AC CMRR at 50 kHz • Wide Common-Mode Range: –4 V to 80 V • Accuracy: – Gain: – Gain Error: 0.20% (max) – Gain Drift: 2.5 ppm/°C (max) – Offset: – Offset Voltage: ±25 μV (max) – Offset Drift: 250 nV/°C (max) • Available Gains: – INA240A1: 20 V/V – INA240A2: 50 V/V – INA240A3: 100 V/V – INA240A4: 200 V/V • Quiescent Current: 2.4 mA (max) 2 Applications • Motor Controls • Solenoid and Valve Controls • Power Management • Actuator Controls • Pressure Regulators • Telecom Equipment 3 Description The INA240 is a voltage-output, current-sense amplifier with enhanced PWM rejection that can sense drops across shunt resistors over a wide common-mode voltage range from –4 V to 80 V, independent of the supply voltage. The negative common-mode voltage allows the device to operate below ground, accommodating the flyback period of typical solenoid applications. Enhanced PWM rejection provides high levels of suppression for large common-mode transients (ΔV/Δt) in systems that use pulse width modulation (PWM) signals (such as motor drives and solenoid control systems). This feature allows for accurate current measurements without large transients and associated recovery ripple on the output voltage. This device operates from a single 2.7-V to 5.5-V power supply, drawing a maximum of 2.4 mA of supply current. Four fixed gains are available: 20 V/V, 50 V/V, 100 V/V, and 200 V/V. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10-mV full-scale. All versions are specified over the extended operating temperature range (–40°C to +125°C), and are offered in an 8-pin TSSOP package. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) INA240 TSSOP (8) 3.00 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Enhanced PWM Rejection |
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