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1µA, µDFN/SC70, Lithium-Ion Battery, Precision Current-Sense Amplifier

Precision Current-Sense Amp with VOS < 500µV, Gain Error < 0.5%, Ideal for a Li+ Battery

Product Details

Key Features

Parametric specs for Current Sense Amplifiers
VOS @25°C (µV) (max) 500
Output Format Voltage
CMVR (V) (min) 1.6
CMVR (V) (max) 5.5
VCC (V) (min) 1.6
VCC (V) (max) 5.5
ICC (µA) (typ) 0.6
Bi-Dir. Curr. Sense No
Gain 100 V/V
25 V/V
50 V/V
Gain Accuracy @25°C (%) (max) 0.5
Oper. Temp. (°C) -40 to +85
Package/Pins SC70/5
UDFN/6
Budgetary
Price (See Notes)
1
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Simplified Block Diagram

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Parameters

Parametric specs for Current Sense Amplifiers
VOS @25°C (µV) (max) 500
Output Format Voltage
CMVR (V) (min) 1.6
CMVR (V) (max) 5.5
VCC (V) (min) 1.6
VCC (V) (max) 5.5
ICC (µA) (typ) 0.6
Bi-Dir. Curr. Sense No
Gain 100 V/V
25 V/V
50 V/V
Gain Accuracy @25°C (%) (max) 0.5
Oper. Temp. (°C) -40 to +85
Package/Pins SC70/5
UDFN/6
Budgetary
Price (See Notes)
1

Key Features

  • Ultra-Low Supply Current of 1µA (max)
  • Low 500µV (max) Input Offset Voltage
  • Low < 0.5% (max) Gain Error
  • Input Common Mode: +1.6V to +5.5V
  • Voltage Output
  • Three Gain Versions Available
    • 25V/V (MAX9610T)
    • 50V/V (MAX9610F)
    • 100V/V (MAX9610H)
  • Tiny µDFN (1mm x 1.5mm x 0.8mm) and SC70 Packages

Applications/Uses

  • 3.3V and 5V Power Management Systems
  • Cameras
  • Cell Phones
  • PDAs
  • Portable Li+ Battery Powered Systems
  • USB Ports

Description

The MAX9610 high-side current-sense amplifier offers precision accuracy specifications of VOS less than 500µV (max) and gain error less than 0.5% (max). This device features an ultra-low 1µA quiescent supply current. The MAX9610 fits in a tiny, 1mm x 1.5mm µDFN package or a 5-pin SC70 package, making this part ideal for applications in notebook computers, cell phones, cameras, PDAs, and all lithium-ion (Li+) battery-operated portable devices where accuracy, low quiescent current, and small size are critical.

The MAX9610 features an input voltage range (common mode) from 1.6V to 5.5V. This input range is excellent for monitoring the current of a single-cell, lithium-ion battery, which at full charge is 4.2V, typically 3.6V in normal use, and less than 2.9V when ready to be recharged. These current-sense amplifiers have a voltage output and are offered in three gain versions: 25V/V (MAX9610T), 50V/V (MAX9610F), and 100V/V (MAX9610H).

The three gain versions offer flexibility in the choice of the external current-sense resistor. The very low 500µV (max) input offset voltage allows small 25mV to 50mV full-scale VSENSE voltage for very low voltage drop at full-load current measurement.

The MAX9610 is offered in tiny 6-pin µDFN, (1mm x 1.5mm x 0.8mm footprint) and 5-pin SC70 packages, specified for operation over the -40°C to +85°C temperature range.

For a very similar 1.6V to 28V input voltage device in a 4-bump UCSP™ package (1mm x 1mm x 0.6mm), refer to the MAX9938 data sheet.

Simplified Block Diagram

MAX9610: Typical Operating Circuit MAX9610: Typical Operating Circuit Zoom icon

Technical Docs

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 .