MAX9610HEXK+ [MAXIM]
Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, PDSO5, ROHS COMPLIANT, MO-203, SC-70, 5 PIN;
| 型号： | MAX9610HEXK+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, PDSO5, ROHS COMPLIANT, MO-203, SC-70, 5 PIN 电池 放大器 |
| 文件： | 总11页 (文件大小：225K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4342; Rev 0; 10/08
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
MAX9610
General Description
Features
♦ Ultra-Low Supply Current of 1µA (max)
The MAX9610 high-side current-sense amplifier offers
precision accuracy specifications of V less than
OS
♦ Low 500µV (max) Input Offset Voltage
♦ Low < 0.5% (max) Gain Error
♦ Input Common Mode: +1.6V to +5.5V
♦ Voltage Output
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.
♦ Three Gain Versions Available
25V/V (MAX9610T)
50V/V (MAX9610F)
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).
100V/V (MAX9610H)
♦ Tiny µDFN (1mm x 1.5mm x 0.8mm) and
SC70 Packages
Ordering Information
PIN-
PACKAGE
GAIN
(V/V)
PART*
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
50
OU
OS
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
100
25
OT
ATG
ATE
ATF
full-scale V
voltage for very low voltage drop at
SENSE
50
full-load current measurement.
100
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.
*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.
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.
Typical Operating Circuit
I
Applications
LOAD
R
SENSE
Cell Phones
RS+
RS-
Cameras
LOAD
Portable Li+ Battery Powered Systems
R
R
1
1
3.3V and 5V Power Management Systems
V
=
BATT
1.6V to 5.5V
PDAs
USB Ports
V
DD
= 3.3V
P
μC
OUT
ADC
Pin Configurations appear at end of data sheet.
R
UCSP is a trademark of Maxim Integrated Products, Inc.
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.
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
ABSOLUTE MAXIMUM RATINGS
RS+, RS- to GND......................................................-0.3V to +6V
OUT to GND .............................................................-0.3V to +6V
RS+ to RS- ............................................................................. 6V
Short-Circuit Duration: OUT to GND or RS+ ..............Continuous
Continuous Input Current (Any Pin).................................. 20mA
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Package Reflow Soldering Temperature .........................+260°C
Continuous Power Dissipation (T = +70°C)
A
5-Pin SC70 (derate 3.1mW/°C above +70°C)..............247mW
6-Pin μDFN (derate 2.1mW/°C above +70°C) .............168mW
MAX9610
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
RS+
= V
= 3.6V, V
= (V
- V ) = 0, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.)
RS+ RS- A A
RS-
SENSE
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
= 3.6V, T = +25°C
MIN
TYP
MAX
1.0
UNITS
V
0.6
RS+
RS+
RS+
RS+
A
V
V
V
= 3.6V, -40°C < T < +85°C
1.4
Supply Current
(Note 2)
A
I
μA
CC
= 5.5V, T = +25°C
0.75
1.2
A
= 5.5V, -40°C < T < +85°C
1.6
A
Guaranteed by CMRR,
-40°C < T < +85°C
Common-Mode Input Range
V
1.6
80
5.5
V
CM
A
Common-Mode Rejection Ratio
Input Offset Voltage
CMRR
1.6V < V
< 5.5V, -40°C < T < +85°C
104
100
dB
RS+
A
T
= +25°C, gain = 25, 50, 100 (Note 3)
500
600
700
A
V
Gain = 25, 50
μV
OS
-40°C < T < +85°C
A
Gain = 100
MAX9610T
MAX9610F
MAX9610H
25
50
Gain
G
V/V
100
0.1
T
= +25°C, gain = 25, 50, 100 (Note 4)
0.5
0.8
1
A
Gain Error
GE
%
kΩ
mV
V
Gain = 25, 50
Gain = 100
-40°C < T < +85°C
A
Output Resistance
OUT Low Voltage
OUT High Voltage
R
T
= +25°C (Note 5)
A
7.0
10
2.5
5
13.2
15
OUT
G = 25
G = 50
G = 100
V
30
OL
10
0.1
70
V
V
= V
- V (Note 6)
OUT
0.2
OH
OH
RS-
2
_______________________________________________________________________________________
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
MAX9610
ELECTRICAL CHARACTERISTICS (continued)
(V
RS+
= V
= 3.6V, V
= (V
- V ) = 0, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.)
RS+ RS- A A
RS-
SENSE
(Note 1)
PARAMETER
SYMBOL
CONDITIONS
= 50mV, G = 25
MIN
TYP
170
110
60
MAX
UNITS
V
SENSE
SENSE
SENSE
Small-Signal Bandwidth
BW
V
V
= 50mV, G = 50
= 50mV, G = 100
kHz
Output Settling Time
Power-Up Time
t
1% final value, V
= 25mV
= 25mV
35
μs
μs
S
SENSE
SENSE
t
1% final value, V
100
ON
Note 1: All devices are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.
A
Note 2: V
= 0V. I
is the total current into RS+ plus RS-.
OUT
CC
Note 3: V is extrapolated from measurements for the Gain Error test.
OS
Note 4: Gain Error is calculated by applying two values of V
and calculating the error of the slope, vs. the ideal:
SENSE
G = 25: V
G = 50: V
20mV and 120mV
10mV and 60mV
SENSE
SENSE
G = 100: V
5mV and 30mV
SENSE
Note 5: The device is stable for any external capacitance value.
Note 6: V
is the voltage from V
to V
with V
= 3.6V/Gain.
OH
RS-
OUT
SENSE
Typical Operating Characteristics
(V
RS+
= V
= 3.6V, T = +25°C.)
A
RS-
MAX9610F
OFFSET VOLTAGE HISTOGRAM
MAX9610F
GAIN ACCURACY HISTOGRAM
SUPPLY CURRENT
vs. TEMPERATURE
1000
900
800
700
600
500
400
300
200
100
0
20
15
10
5
30
25
20
5.5V
3.6V
15
10
1.6V
5
0
0
-200-150-100 -50
0
-0.15 -0.1 -0.05
0
-250
50 100 150 200 250
-0.2
0.05 0.1 0.15 0.2
-40
-15
10
35
60
85
OFFSET VOLTAGE (μV)
GAIN ACCURACY (%)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
Typical Operating Characteristics (continued)
(V
RS+
= V = 3.6V, T = +25°C.)
RS- A
SUPPLY CURRENT
vs. COMMON-MODE VOLTAGE
OFFSET VOLTAGE
vs. TEMPERATURE
OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
100
90
80
70
60
50
40
30
20
10
0
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0
60
50
40
30
20
10
0
MAX9610
1.6 2.1
2.6
3.1 3.6
4.1 4.6 5.5
-40
-15
10
35
60
85
5.5
1.6 2.1 2.6 3.1 3.6 4.1 4.6 5.1
COMMON-MODE VOLTAGE (V)
COMMON-MODE VOLTAGE (V)
TEMPERATURE (°C)
GAIN ERROR
vs. COMMON-MODE VOLTAGE
V
vs. V
OUT SENSE
V
= 5.5V
GAIN ERROR vs. TEMPERATURE
RS+
0%
-0.02%
-0.04%
-0.06%
-0.08%
-0.10%
-0.12%
-0.14%
-0.16%
-0.18%
-0.20%
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.25%
0.23%
0.21%
0.19%
0.17%
0.15%
0.13%
0.11%
0.09%
0.07%
0.05%
G = 25
G = 50
G = 100
1.6 2.1 2.6 3.1 3.6 4.1 4.6 5.1 5.5
COMMON-MODE VOLTAGE (V)
0
50
100
150
(mV)
200
250
-40
-15
10
35
60
85
V
TEMPERATURE (°C)
SENSE
V
vs. V
NORMALIZED GAIN
vs. FREQUENCY
OUT
V
SENSE
CMRR vs. FREQUENCY
= 1.6V
RS+
-20
-40
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
5
0
G = 100
G = 50
-60
-5
G = 25
-80
-10
-15
-20
-25
G = 25
G = 50
-100
-120
-140
G = 100
10
100
1k
10k
100k
0
10 20 30 40 50 60 70 80
(mV)
0.1
1
10
100
1000
FREQUENCY (Hz)
V
FREQUENCY (kHz)
SENSE
4
_______________________________________________________________________________________
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
MAX9610
Typical Operating Characteristics (continued)
(V
RS+
= V = 3.6V, T = +25°C.)
RS- A
SMALL-SIGNAL RESPONSE
G = 50
SMALL-SIGNAL RESPONSE
G = 25
MAX9610 toc14
MAX9610 toc13
10mV/div
20mV/div
V
V
SENSE
SENSE
V
OUT
V
OUT
200mV/div
200mV/div
10μs/div
10μs/div
LARGE-SIGNAL RESPONSE
G = 25
SMALL-SIGNAL RESPONSE
G = 100
MAX9610 toc16
MAX9610 toc15
100mV/div
5mV/div
V
V
SENSE
SENSE
V
1V/div
V
OUT
200mV/div
OUT
10μs/div
10μs/div
LARGE-SIGNAL RESPONSE
G = 50
LARGE-SIGNAL RESPONSE
G = 100
MAX9610 toc17
MAX9610 toc18
50mV/div
20mV/div
V
V
SENSE
SENSE
V
1V/div
V
1V/div
OUT
OUT
10μs/div
10μs/div
_______________________________________________________________________________________
5
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
OUT Swing vs. V
and V
SENSE
RS+
Pin Description
The MAX9610 is unique since the supply voltage is the
input common-mode voltage (the average voltage at
PIN
NAME
GND
N.C.
OUT
RS-
FUNCTION
RS+ and RS-). There is no separate V
supply voltage
CC
µDFN
SC70
input. Therefore, the OUT voltage swing is limited by
the minimum voltage at RS+.
1
1, 2
Ground
No Connection. Not internally
connected.
2, 5
3
—
3
V
= V
- V
- V
SENSE(MAX) OH
OUT(MAX)
RS+(MAX)
and
Output
MAX9610
V
Load-Side Connection to
External Sense Resistor
OUT
R
=
4
4
SENSE
G × I
(max)
LOAD
Power-Side Connection to
External Sense Resistor
6
5
RS+
V
full scale should be less than V
/gain at the
OUT
SENSE
minimum RS+ voltage. For best performance with a
3.6V supply voltage, select R to provide approxi-
SENSE
Detailed Description
mately 120mV (gain of 25V/V), 60mV (gain of 50V/V), or
30mV (gain of 100V/V) of sense voltage for the full-
scale current in each application. These can be
increased by use of a higher minimum input voltage.
The MAX9610 family of unidirectional high-side, cur-
rent-sense amplifiers features a 1.6V to 5.5V input com-
mon-mode range. The input range is excellent for
monitoring the current of a single-cell lithium-ion battery
(Li+), which at full charge is 4.2V, typically 3.6V in nor-
mal use, and less than 2.9V when ready to be
recharged. The MAX9610 is ideal for many battery-
powered, handheld devices because it uses only 1μA
quiescent supply current to extend battery life. The
MAX9610 monitors current through a current-sense
resistor and amplifies the voltage across that resistor.
See the Typical Operating Circuit on page 1.
Accuracy
In the linear region (V
< V
), there are two
OUT
OUT(MAX)
components to accuracy: input offset voltage (V ) and
OS
Gain Error (GE). The MAX9610 has V
= 500μV (max)
OS
and Gain Error of 0.5% (max). Use the following linear
equation to calculate total error.
V
= (Gain GE) x V
(Gain x V
)
OS
OUT
SENSE
A high R
value allows lower currents to be mea-
SENSE
The MAX9610 is a unidirectional current-sense amplifier
that has a well-established history. An op amp is used
to force the current through an internal gain resistor at
sured more accurately because offsets are less signifi-
cant when the sense voltage is larger.
Efficiency and Power Dissipation
RS+ that has a value of R , such that its voltage drop
1
At high current levels, the I2R loss in R
significant. Take this into consideration when choosing
the resistor value and its power dissipation (wattage)
rating. Also, the sense resistor’s value might drift if it is
allowed to heat up excessively. The precision V
the MAX9610 allows the use of small sense resistors to
reduce power dissipation and reduce hot spots.
can be
SENSE
equals the voltage drop across an external sense resis-
tor, R
. There is an internal resistor at RS- with the
SENSE
same value as R to minimize offset voltage. The cur-
1
rent through R is sourced by a pFET. Its drain current
1
of
OS
is the same as its source current that flows through a
second gain resistor, R
voltage, V
OUT
. This produces an output
OUT
, whose magnitude is I
x R
x
SENSE
OUT
LOAD
R
/R . The gain accuracy is based on the matching
1
of the two gain resistors R and R
(see Table 1).
OUT
1
Total gain = 25V/V for the MAX9610T, 50V/V for the
MAX9610F, and 100V/V for the MAX9610H.
Table 1. MAX9610, Internal Gain Setting
Resistors (Typical Values)
Applications Information
GAIN (V/V)
R (Ω)
R
(Ω)
OUT
1
Choosing the Sense Resistor
Choose R
based on the following criteria.
SENSE
100
50
100
200
400
10k
10k
10k
Voltage Loss
value causes the power-source voltage
25
A high R
SENSE
to drop due to IR loss. For minimal voltage loss, use the
lowest R value.
SENSE
6
_______________________________________________________________________________________
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
MAX9610
Kelvin Connections
Typical Application Circuit
Because of the high currents that flow through R
,
SENSE
Bidirectional Application
Battery-powered systems may require a precise bidi-
rectional current-sense amplifier to accurately monitor
the battery’s charge and discharge currents.
Measurements of the two separate outputs with respect
to GND yield an accurate measure of the charge and
discharge currents, respectively (Figure 1).
take care to eliminate parasitic trace resistance from
causing errors in the sense voltage. Either use a four
terminal current-sense resistor or use Kelvin (force and
sense) PCB layout techniques.
Optional Output Filter Capacitor
When designing a system that uses a sample and hold
stage in the analog-to-digital converter, the sampling
capacitor momentarily loads OUT and causes a drop in
the output voltage. If sampling time is very short (less
than a microsecond), consider using a ceramic capaci-
tor across OUT and GND to hold V
constant during
OUT
sampling. This also decreases the small-signal band-
width of the current-sense amplifier and reduces noise
at OUT.
I
LOAD
R
SENSE
TO WALL-CUBE/
CHARGER
RS+
RS-
RS+
RS-
LOAD
R
1
R
1
R
1
R
1
V
DD
= 3.3V
V
= 1.6V TO 5.5V
BATT
P
P
MICRO-
CONTROLLER
OUT
OUT
ADC
R
OUT
R
OUT
MAX9610
MAX9610
GND
GND
ADC
Figure 1. Bidirectional Application
_______________________________________________________________________________________
7
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
Pin Configurations
Chip Information
PROCESS: BiCMOS
TOP VIEW
(PINS ON BOTTOM)
RS+
N.C.
5
RS-
4
6
MAX9610
MAX9610T/F/H
+
1
2
3
GND
N.C.
OUT
1mm x 1.5mm μDFN
TOP VIEW
RS+
5
RS-
4
MAX9610T/F/H
+
1
2
3
OUT
GND
GND
2mm x 2.2mm SC70
(DIAGRAMS NOT TO SCALE.)
8
_______________________________________________________________________________________
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
MAX9610
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE TYPE
6 μDFN
PACKAGE CODE
L611+1
DOCUMENT NO.
21-0147
5 SC70
X5+1
21-0076
TOPMARK
2
3
e
b
5
A
5
4
4
6
PIN 1
0.075x45
L
E
AA
3
2
1
1
A2
PIN 1
MARK
A
A
L2
L1
D
A1
TOP VIEW
SIDE VIEW
BOTTOM VIEW
COMMON DIMENSIONS
b
MIN.
0.65
--
0.00
1.45
0.95
0.30
0.00
0.05
0.17
NOM.
0.72
0.20
--
1.50
1.00
0.35
--
MAX.
0.80
--
0.05
1.55
1.05
0.40
0.08
0.10
0.23
A
A1
A2
D
E
L
L1
L2
b
SECTION A-A
--
0.20
0.50 BSC.
e
Pkg.
Code
L611-1, L611-2
TITLE:
PACKAGE OUTLINE, 6L uDFN, 1.5x1.0x0.8mm
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
-DRAWING NOT TO SCALE-
21-0147
E
2
_______________________________________________________________________________________
9
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
TABLE 1
Translation Table for Calendar Year Code
Calendar Year 2005 2006 2007 2008
2009
2010
2011
2012
2013
2014
MAX9610
Legend:
Marked with bar
Blank space - no bar required
TABLE 2
Translation Table for Payweek Binary Coding
Payweek 06-11 12-17 18-23 24-29 30-35
36-41 42-47
48-51 52-05
Legend:
Marked with bar
Blank space - no bar required
TITLE:
PACKAGE OUTLINE, 6L uDFN, 1.5x1.0x0.8mm
APPROVAL
DOCUMENT CONTROL NO.
REV.
2
-DRAWING NOT TO SCALE-
21-0147
E
2
10 ______________________________________________________________________________________
1µA, µDFN/SC70, Lithium-Ion Battery,
Precision Current-Sense Amplifier
MAX9610
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE OUTLINE, 5L SC70
1
21-0076
E
1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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