SP Amp Current Sense Amp Single 5.5V 8-Pin uMAX

The MAX9928F/MAX9929F low-cost, uni-/bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. These devices feature a wide -0.1V to +28V input common-mode voltage range, low 20µA supply current with VOS less than 0.4mV, and a gain accuracy better than 1.0%. The input common-mode range is independent of the supply voltage, ensuring that the current-sense information remains accurate even when the measurement rail is shorted to ground. The MAX9928F features a current output with a transconductance ratio of 5µA/mV. An external resistor converts the output current to a voltage, allowing adjustable gain so that the input sense voltage can be matched to the maximum ADC input swing. The MAX9929F has a voltage output and integrates a 10kO output resistor for a fixed voltage gain of 50V/V. A digital SIGN output indicates direction of current flow, so the user can utilize the full ADC input range for measuring both charging and discharging currents. The MAX9928F/MAX9929F are fully specified over the -40°C to +125°C automotive temperature range, and available in 6-bump UCSP (1mm x 1.5mm) and 8-pin µMAX packages. The UCSP package is bump-to-bump compatible with the MAX4372_EBT.

• Wide -0.1V to +28V Common-Mode Range, Independent of Supply Voltage
• 2.5V to 5.5V Operating Supply Voltage
• 20µA Quiescent Supply Current
• 0.4mV (max) Input Offset Voltage
• Gain Accuracy Better than 1% (max)
• SIGN Output Indicates Current Polarity
• Transconductance and Gain Versions Available
  • 5µA/mV (MAX9928F)
  • 50V/V (MAX9929F)

Pin Compatible with the MAX4372 in UCSP

Available in Ultra-Small, 3x2 UCSP (1mm x 1.5mm) and 8-Pin µMAX Packages