Maxim's MAX44284 is a high-side, current-sense amplifier that operates with a 1.7 V to 5.5 V single supply and is optimized for very low power operation with only 21 µA of quiescent current.
The MAX44284 offers precision accuracy specifications of 2 µV VOS and gain error of 0.05%. The device features an input common-mode voltage range from -0.1 V to 36 V. This current-sense amplifier has a voltage output and is offered in four different gain versions.
The MAX44284 is offered in small 6-bump, 0.4 mm-pitch WLP (1.3 mm x 0.9 mm) and 6-pin SOT23 packages and is specified for operation over the -40°C to 125°C automotive temperature range.
| Features |
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- Supports use of small current-sense resistors to improve power-supply conversion efficiency and measurement accuracy
- Input bias current of 80 nA (max)
- Very-low 2 µV input offset voltage (MAX44284F/H)
- Extremely-low 50 nV/°C input offset tempco coefficient
- -0.1 V to 36 V wide-input common-mode range
- Low 0.05% gain error
- Extends battery life
- Low-supply current of 21 µA
- 1.7 V to 5.5 V single-supply
- Shutdown input (independent of VDD)
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- Four fixed gain options simplify design
- Base-stations
- DC-DC current sensing in power management
- Medical pulse oximeters and infusion pumps
- Notebook computers
- Portable-/battery-powered systems
- Smartphones and tablets
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| Applications |
|
- Base-stations
- DC-DC current sensing in power management
- Medical pulse oximeters and infusion pumps
|
- Notebook computers
- Portable-/battery-powered systems
- Smartphones and tablets
|
