CSA250LCSOIC8
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-6V to 80V, bidirectional, ultra-precision current sense amplifier with enhanced PWM suppression
Product details
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Parameters
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Characteristics
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Package
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Description
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Supply voltage
2.7V-5.5V
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Common-mode input voltage range
-6V-80V
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Bandwidth
450kHz
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Supports PWM suppression functionality
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Gain
10
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Current sensing direction
Bidirection
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Number of channels
1
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• Enhanced PWM suppression
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• Excellent CMRR
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160dB DC CMRR (typ)
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106dB AC CMRR at 50kHz (typ)
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• Wide common-mode voltage range
−6V ~ 80V
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• Accuracy
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Gain:
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• Gain error: 0.15% (max)
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• Gain drift: 16ppm/°C (max)
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Offset:
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• Offset voltage: ±15μV (max)
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• Offset drift: 340nV/°C (max)
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• Available gain options
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CSA250K: 10V/V
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CSA250L: 20V/V
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CSA250M: 50V/V
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CSA250N: 100V/V
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• Quiescent current
1.4mA (typ)
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SOIC-8 4.9mm ×3.9mm
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The CSA250 is a current sense amplifier with voltage output. It features enhanced PWM suppression, allowing it to detect the voltage drop across a shunt resistor over a wide common-mode voltage range from -6V to 80V. The -6V common-mode voltage capability of the CSA250 enables the device to operate below ground potential. For example, in applications such as detecting the flyback period of a solenoid, enhanced PWM suppression provides high-level attenuation of large common-mode transients in systems controlled by PWM signals. This feature allows for precise current measurement without significant transients and associated recovery ripple on the output voltage.The device operates from a single supply voltage ranging from 2.7V to 5.5V, with a typical supply current of 1.4mA and a typical bandwidth of 450kHz. The CSA250 offers three fixed gain options: 10V/V, 20V/V, 50V/V, and 100V/V. Its zero-drift architecture enables low full-scale current sensing down to 10mV across the shunt (typical value). All versions are specified to operate over an extended temperature range of -40°C to 125°C and are available in SOIC-8, TSSOP-8, and MSOP-8 packages.
