MAX44284
36V, Input Common-Mode, High-Precision, Low-Power Current-Sense Amplifier
Measure Four Decades of Dynamic Range without Increasing Measurement Errors
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Key Features
Applications/Uses
| VSENSE_FS (mV) (recomm.) | 10 25 50 100 |
| VOS @25°C (µV) (max) | 10 |
| Output Format | Voltage |
| CMVR (V) (min) | -0.1 |
| CMVR (V) (max) | 36 |
| VCC (V) (min) | 1.7 |
| VCC (V) (max) | 5.5 |
| ICC (µA) (typ) | 21 |
| Bi-Dir. Curr. Sense | No |
| Gain | 100 V/V 200 V/V 50 V/V 500 V/V |
| Gain Accuracy @25°C (%) (max) | 0.15 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | SOT23/6 WLP/6 |
| Budgetary Price (See Notes) | 0.98 |
Simplified Block Diagram
Technical Docs
Essential Analog Toolkit: Current-Sense Amplifiers
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Parameters
| VSENSE_FS (mV) (recomm.) | 10 25 50 100 |
| VOS @25°C (µV) (max) | 10 |
| Output Format | Voltage |
| CMVR (V) (min) | -0.1 |
| CMVR (V) (max) | 36 |
| VCC (V) (min) | 1.7 |
| VCC (V) (max) | 5.5 |
| ICC (µA) (typ) | 21 |
| Bi-Dir. Curr. Sense | No |
| Gain | 100 V/V 200 V/V 50 V/V 500 V/V |
| Gain Accuracy @25°C (%) (max) | 0.15 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | SOT23/6 WLP/6 |
| Budgetary Price (See Notes) | 0.98 |
Key Features
- Supports Use of Small Current-Sense Resistors to Improve Power-Supply Conversion Efficiency and Measurement Accuracy
- Input Bias Current of 80nA (max)
- Very Low 2µV Input Offset Voltage (MAX44284F/H)
- Extremely Low 50nV/°C Input Offset Tempco Coefficient
- -0.1V to +36V Wide Input Common-Mode Range
- Low 0.05% Gain Error
- Extends Battery Life
- Low Supply Current of 21µA
- 1.7V to 5.5V Single Supply
- Shutdown Input (Independent of VDD)
- Four Fixed Gain Options Simplify Design
- 50V/V – MAX44284F
- 100V/V – MAX44284H
- 200V/V – MAX44284W
- 500V/V – MAX44284E
Applications/Uses
- Base-Stations
- DC-DC Current Sensing in Power Management
- Medical Pulse Oximeters and Infusion Pumps
- Notebook Computers
- Portable-/Battery-Powered Systems
- Smartphones and Tablets
Description
The MAX44284 is a high-side, current-sense amplifier that operates with a 1.7V to 5.5V single supply and is optimized for very low power operation with only 21µA of quiescent current.
The MAX44284 offers precision accuracy specifications of 2µV VOS and gain error of 0.05%. The device features an input common-mode voltage range from -0.1V to +36V. This current-sense amplifier has a voltage output and is offered in four different gain versions.
The MAX44284 is offered in small 6-bump, 0.4mm-pitch WLP (1.3mm x 0.9mm) and 6-pin SOT23 packages and is specified for operation over the -40°C to +125°C automotive temperature range.
Technical Docs
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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