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High-Side Power and Current Monitors

Product Details

Key Features

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 100
150
Output Format Voltage
CMVR (V) (min) 4
CMVR (V) (max) 28
VCC (V) (min) 2.7
VCC (V) (max) 5.5
ICC (µA) (typ) 380
Bi-Dir. Curr. Sense No
Gain 16.67 V/V
25 V/V
40.96 V/V
Gain Accuracy @25°C (%) (max) 1.5
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/6
UMAX/8
Budgetary
Price (See Notes)
1.26
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Simplified Block Diagram

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Parameters

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 100
150
Output Format Voltage
CMVR (V) (min) 4
CMVR (V) (max) 28
VCC (V) (min) 2.7
VCC (V) (max) 5.5
ICC (µA) (typ) 380
Bi-Dir. Curr. Sense No
Gain 16.67 V/V
25 V/V
40.96 V/V
Gain Accuracy @25°C (%) (max) 1.5
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/6
UMAX/8
Budgetary
Price (See Notes)
1.26

Key Features

  • Real-Time Current and Power Monitoring
  • ±1.5% (max) Current-Sense Accuracy
  • ±1.5% (max) Power-Sense Accuracy
  • Two Uncommitted Comparators (MAX4211)
  • 1.21V Reference Output (MAX4211)
  • Three Current/Power Gain Options
  • 100mV/150mV Current-Sense Full-Scale Voltage
  • +4V to +28V Input Source Voltage Range
  • +2.7V to +5.5V Power-Supply Voltage Range
  • Low Supply Current: 380µA (MAX4210)
  • 220kHz Bandwidth
  • Small 6-Pin TDFN and 8-Pin µMAX Packages (MAX4210)

Applications/Uses

  • Baseband Analog Multipliers
  • Measurement Instrumentation
  • Overpower Circuit Breakers
  • Power-Level Detectors
  • Power-Supply Displays
  • Short-Circuit Protection
  • Smart Battery Packs/Chargers
  • Smart Peripheral Control
  • VGA Circuits

Description

The MAX4210/MAX4211 low-cost, low-power, high-side power/current monitors provide an analog output voltage proportional to the power consumed by a load by multiplying load current and source voltage. The MAX4210/MAX4211 measure load current by using a high-side current-sense amplifier, making them especially useful in battery-powered systems by not interfering with the ground path of the load.

The MAX4210 is a small, simple 6-pin power monitor intended for limited board space applications. The MAX4210A/B/C integrate an internal 25:1 resistor-divider network to reduce component count. The MAX4210D/E/F use an external resistor-divider network for greater design flexibility.

The MAX4211 is a full-featured current and power monitor. The device combines a high-side current-sense amplifier, 1.21V bandgap reference, and two comparators with open-drain outputs to make detector circuits for overpower, overcurrent, and/or overvoltage conditions. The open-drain outputs can be connected to potentials as high as 28V, suitable for driving high-side switches for circuit-breaker applications.

Both the MAX4210/MAX4211 feature three different current- sense amplifier gain options: 16.67V/V, 25.00V/V, and 40.96V/V. The MAX4210 is available in 3mm x 3mm, 6-pin TDFN and 8-pin µMAX® packages and the MAX4211 is available in 4mm x 4mm, 16-pin thin QFN and 16-pin TSSOP packages. Both parts are specified for the -40°C to +85°C extended operating temperature range.

Simplified Block Diagram

MAX4210, MAX4211: Typical Operating Circuit MAX4210, MAX4211: Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .