Product Descriptions
The MAX4172 is a low-cost, precision, high-side currentsense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the battery charger’s ground path. Wide bandwidth and ground-sensing capability make the device suitable for closed-loop battery-charger and general-purpose currentsource applications. The 0 to 32V input common-mode range is independent of the supply voltage, which ensures that current-sense feedback remains viable, even when connected to a battery in deep discharge.
To provide a high level of flexibility, the MAX4172 functions with an external sense resistor to set the range of load current to be monitored. It has a current output that can be converted to a ground-referred voltage with a single resistor, accommodating a wide range of battery voltages and currents.
An open-collector power-good output (PG) indicates when the supply voltage reaches an adequate level to guarantee proper operation of the current-sense amplifier. The MAX4172 operates with a 3.0V to 32V supply voltage, and is available in a space-saving, 8-pin μMAX? or SO package.
Product Features
● Ideal for High-Side Monitoring
? 3V to 32V Supply Operation
? ±0.5% Typical Full-Scale Accuracy Over Temperature
? High Accuracy +2V to +32V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage
? 800kHz Bandwidth [VSENSE = 100mV (1C)]
? 200kHz Bandwidth [VSENSE = 6.25mV (C/16)]
● Minimizes Board Space Requirements
? μMAX and SO Packages
Product Applications
● Portable PCs: Notebooks/Subnotebooks/Palmtops
● Battery-Powered/Portable Equipment
● Closed-Loop Battery Chargers/Current Sources
● Smart-Battery Packs
● Portable/Cellular Phones
● Portable Test/Measurement Systems
● Energy Management Systems
Specifications
Part# | MAX4172ESA+ |
Category | Integrated Circuits (ICs) |
Linear | |
Amplifiers | |
Instrumentation, OP Amps, Buffer Amps | |
Mfr | Analog Devices Inc./Maxim Integrated |
Series | - |
Package | Tube |
Product Status | Active |
Amplifier Type | Current Sense |
Number of Circuits | 1 |
Output Type | - |
Slew Rate | - |
-3db Bandwidth | 800 kHz |
Current - Input Bias | 50 μA |
Voltage - Input Offset | 1 mV |
Current - Supply | 800μA |
Voltage - Supply Span (Min) | 3 V |
Voltage - Supply Span (Max) | 32 V |
Operating Temperature | -40°C ~ 85°C |
Mounting Type | Surface Mount |
Package / Case | 8-SOIC (0.154", 3.90mm Width) |
Supplier Device Package | 8-SOIC |
Base Product Number | MAX4172 |
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