MAX9610 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – 1μA, μDFN/SC70, Lithium-Ion Battery, Precision Current-Sense Amplifier

19-4342; Rev 0; 10/08
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
General Description
The MAX9610 high-side current-sense amplifier offers
precision accuracy specifications of V_OS less than
500μV (max) and gain error less than 0.5% (max). This
device features an ultra-low 1μA quiescent supply cur-
rent. 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 battery-
operated portable devices where accuracy, low quies-
cent current, and small size are critical.
The MAX9610 features an input voltage range (com-
mon mode) from 1.6V to 5.5V. This input range is excel-
lent for monitoring the current of a single-cell,
lithium-ion battery (Li+), 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 ver-
sions: 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 V_SENSE 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 temper-
ature 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.
Applications
Cell Phones
Cameras
Portable Li+ Battery Powered Systems
3.3V and 5V Power Management Systems
PDAs
USB Ports
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
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
Ordering Information
PART*
PIN-
PACKAGE
GAIN
(V/V)
TOP MARK
MAX9610TELT+T
MAX9610FELT+T
MAX9610HELT+T
MAX9610TEXK+T
MAX9610FEXK+T
MAX9610HEXK+T
6 μDFN
6 μDFN
6 μDFN
5 SC70
5 SC70
5 SC70
25
OU
50
OS
100
OT
25
ATG
50
ATE
100
ATF
*All devices are specified over the -40°C to +85°C extended
temperature range.
+Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit
I_LOAD
R_SENSE
RS+
RS-
R₁
R₁
LOAD
V_BATT =
1.6V to 5.5V
P
V_DD = 3.3V
μC
OUT
ADC
R_OUT
10kΩ
MAX9610
GND
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.