MAX9938HEUK+ [MAXIM]
1μA, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier; 1μA ， 4焊球UCSP / SOT23封装，高精度电流检测放大器
| 型号： | MAX9938HEUK+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 1μA, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier |
| 文件： | 总14页 (文件大小：471K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4110; Rev 3; 10/09
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
MAX938
General Description
Features
The MAX9938 high-side current-sense amplifier offers
o Ultra-Low Supply Current of 1µA (max)
precision accuracy specifications of V
less than
OS
o Low 500µV (max) Input Offset Voltage
o Low < 0.5% (max) Gain Error
o Input Common Mode: +1.6V to +28V
o Voltage Output
500µV (max) and gain error less than 0.5% (max).
Quiescent supply current is an ultra-low 1µA. The
MAX9938 fits in a tiny, 1mm x 1mm UCSP™ package
size or a 5-pin SOT23 package, making the part ideal for
applications in notebook computers, cell phones, PDAs,
and all battery-operated portable devices where accura-
cy, low quiescent current, and small size are critical.
o Three Gain Versions Available
25V/V (MAX9938T)
50V/V (MAX9938F)
The MAX9938 features an input common-mode voltage
range from 1.6V to 28V. These current-sense amplifiers
have a voltage output and are offered in four gain versions:
25V/V (MAX9938T), 50V/V (MAX9938F), 100V/V
(MAX9938H), and 200V/V (MAX9938W).
100V/V (MAX9938H)
200V/V (MAX9938W)
o Tiny 1mm x 1mm x 0.6mm, 4-Bump UCSP,
5-Pin SOT23, or 2mm x 2mm x 0.8mm, 6-Pin
µDFN Packages
The three gain selections offer flexibility in the choice of
the external current-sense resistor. The very low 500µV
(max) input offset voltage allows small 25mV to 50mV
voltage for very low voltage drop at
full-current measurement.
Ordering Information
PIN-
PACKAGE
GAIN
(V/V)
TOP
MARK
full-scale V
SENSE
PART
MAX9938TEBS+G45
MAX9938FEBS+G45
MAX9938HEBS+G45
MAX9938WEBS+G45
MAX9938TEUK+
4 UCSP
4 UCSP
4 UCSP
4 UCSP
5 SOT23
5 SOT23
5 SOT23
5 SOT23
6 µDFN
25
50
+AGD
+AGE
+AGF
The MAX9938 is offered in tiny 4-bump, UCSP (1mm x
1mm x 0.6mm footprint), 5-pin SOT23, and 6-pin µDFN
(2mm x 2mm x 0.8mm) packages specified for operation
over the -40°C to +85°C extended temperature range.
100
200
25
+AGI
+AFFB
+AFFC
+AFFD
+AFGZ
+ACM
Applications
MAX9938FEUK+
50
Cell Phones
MAX9938HEUK+
MAX9938WEUK+
MAX9938FELT+
100
200
50
PDAs
Power Management Systems
Portable/Battery-Powered Systems
Notebook Computers
+Denotes a lead(Pb)-free/RoHS-compliant package.
G45 indicates protective die coating.
Note: All devices are specified over the -40°C to +85°C
extended temperature range.
UCSP is a trademark of Maxim Integrated Products, Inc.
Pin Configurations
TOP VIEW
(BUMPS ON BOTTOM)
TOP VIEW
(PADS ON BOTTOM)
RS+
5
RS-
4
RS+
A1
A2
RS-
RS-
6
1
OUT
N.C.
GND
MAX9938T/F/H/W
MAX9938T/F/H/W
5
4
N.C.
RS+
2
3
MAX9938FELT
GND
B1
B2
OUT
1
2
3
UCSP
GND
GND
OUT
µDFN
SOT23
DRAWINGS NOT TO SCALE
________________________________________________________________ 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, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
ABSOLUTE MAXIMUM RATINGS
RS+, RS- to GND....................................................-0.3V to +30V
OUT to GND .............................................................-0.3V to +6V
RS+ to RS- ........................................................................... 30V
Short-Circuit Duration: OUT to GND ..........................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
Bump Temperature (soldering) Reflow............................+260°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Continuous Power Dissipation (T = +70°C)
A
4-Bump UCSP (derate 3.0mW/°C above +70°C).........238mW
5-Pin SOT23 (derate 3.9mW/°C above +70°C)............312mW
6-Pin µDFN (derate 4.5mW/°C above +70°C) .............358mW
MAX938
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 ) = 0V, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
RS-
SENSE
RS+
RS-
A
A
PARAMETER
SYMBOL
CONDITIONS
= 5V, T = +25°C
MIN
TYP
MAX
0.85
1.1
UNITS
V
V
V
V
0.5
RS+
RS+
RS+
RS+
A
= 5V, -40°C < T < +85°C
A
Supply Current (Note 2)
I
µA
CC
= 28V, T = +25°C
1.1
1.8
A
= 28V, -40°C < T < +85°C
2.5
A
Common-Mode Input Range
Common-Mode Rejection Ratio
V
Guaranteed by CMRR , -40°C < T < +85°C
1.6
94
28
V
CM
A
CMRR
1.6V < V
< 28V, -40°C < T < +85°C
130
100
dB
RS+
A
T
A
= +25°C
500
600
Input Offset Voltage (Note 3)
V
µV
OS
-40°C < T < +85°C
A
MAX9938T
MAX9938F
MAX9938H
MAX9938W
25
50
Gain
G
V/V
100
200
0.1
T
A
= +25°C
0.5
0.6
13.2
26.4
15
Gain Error (Note 4)
Output Resistance
GE
%
-40°C < T < +85°C
A
MAX9938T/F/H
MAX9938W
7.0
10
20
1.5
3
R
(Note 5)
kΩ
OUT
14.0
Gain = 25
Gain = 50
Gain = 100
Gain = 200
30
OUT Low Voltage
OUT High Voltage
V
mV
V
OL
6
60
12
0.1
125
60
30
15
100
200
120
0.2
V
V
V
V
V
V
= V
- V
(Note 6)
OH
OH
RS-
OUT
= 50mV, gain = 25
= 50mV, gain = 50
= 50mV, gain = 100
= 50mV, gain = 200
SENSE
SENSE
SENSE
SENSE
Small-Signal Bandwidth
(Note 5)
BW
kHz
Output Settling Time
Power-Up Time
t
1% final value, V
1% final value, V
= 50mV
= 50mV
µs
µs
S
SENSE
SENSE
t
ON
Note 1: All devices are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.
A
Note 2: V
= 0. I
is the total current into RS+ plus RS- pins.
OUT
CC
2
_______________________________________________________________________________________
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
MAX938
ELECTRICAL CHARACTERISTICS (continued)
(V
RS+
= V
= 3.6V, V
= (V - V ) = 0V, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
RS+ RS- A A
RS-
SENSE
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
Gain = 25, V
Gain = 50, V
is 20mV and 120mV.
is 10mV and 60mV.
SENSE
SENSE
Gain = 100, V
Gain = 200, V
is 5mV and 30mV.
is 2.5mV and 15mV.
SENSE
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
= V
= 3.6V, T = +25°C, unless otherwise noted.)
A
RS+
RS-
SUPPLY CURRENT
vs. TEMPERATURE
GAIN ERROR HISTOGRAM
INPUT OFFSET VOLTAGE HISTOGRAM
30
25
20
15
10
5
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
30
25
20
15
10
5
28V
3.6V
1.8V
0
0
-0.4 -0.3 -0.2 -0.1
0
0.1 0.2 0.3 0.4
-40
-15
10
35
60
85
-0.4 -0.3 -0.2 -0.1
0
0.1 0.2 0.3 0.4
GAIN ERROR (%)
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (mV)
INPUT OFFSET
vs. COMMON-MODE VOLTAGE
INPUT OFFSET
vs. TEMPERATURE
SUPPLY CURRENT
vs. COMMON-MODE VOLTAGE
-30
-35
-40
-45
-50
-55
60
50
40
30
20
10
0
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
5
10
15
20
25
30
-40
-15
10
35
60
85
0
5
10
15
20
25
30
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
3
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
Typical Operating Characteristics (continued)
(V
= V
= 3.6V, T = +25°C, unless otherwise noted.)
RS+
RS-
A
GAIN ERROR
vs. COMMON-MODE VOLTAGE
V
vs. V
GAIN ERROR
vs. TEMPERATURE
OUT SENSE
(SUPPLY = 3.6V)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
MAX938
G = 100
G = 50
G = 25
0
5
10
15
20
25
30
0
50
100
150
-40
-15
10
35
60
85
VOLTAGE (V)
V
(mV)
SENSE
TEMPERATURE (°C)
V
vs. V
SMALL SIGNAL GAIN
vs. FREQUENCY
CMRR
vs. FREQUENCY
OUT
SENSE
(SUPPLY = 1.6V)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
5
0
0
-20
A
= 25V/V
V
G = 25
-40
A
= 100V/V
V
-5
G = 50
-60
G = 100
G = 50
A
= 50V/V
V
-10
-15
-20
-25
-30
-80
G = 100
-100
-120
-140
-160
G = 25
0
20
40
60
80
100
1Hz 10Hz 100Hz 1kHz 10kHz 100kHz 1MHz
FREQUENCY (kHz)
1Hz 10Hz 100Hz 1kHz 10kHz 100kHz 1MHz
FREQUENCY (kHz)
V
(mV)
SENSE
SMALL-SIGNAL PULSE RESPONSE
(GAIN = 50)
SMALL-SIGNAL PULSE RESPONSE
(GAIN = 100)
MAX9938 toc13b
MAX9938 toc13a
30mV
15mV
V
SENSE
10mV
1.5V
V
SENSE
20mV
1.5V
V
OUT
V
OUT
1V
1V
25µs/div
20µs/div
4
_______________________________________________________________________________________
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
MAX938
Typical Operating Characteristics (continued)
(V
= V
= 3.6V, T = +25°C, unless otherwise noted.)
RS+
RS-
A
SMALL-SIGNAL PULSE RESPONSE
(GAIN = 25)
LARGE-SIGNAL PULSE RESPONSE
(GAIN = 100)
MAX9938 toc13c
MAX9938 toc14a
30mV
10mV
60mV
V
SENSE
V
SENSE
40mV
1.5V
3V
1V
V
OUT
V
OUT
1V
25µs/div
20µs/div
LARGE-SIGNAL PULSE RESPONSE
(GAIN = 25)
LARGE-SIGNAL PULSE RESPONSE
(GAIN = 50)
MAX9938 toc14c
MAX9938 toc14b
120mV
60mV
V
SENSE
V
SENSE
20mV
3V
10mV
3V
V
OUT
V
OUT
0.5V
0.5V
25µs/div
25µs/div
Pin Description
PIN
NAME
FUNCTION
UCSP
A1
SOT23
µDFN
5
4
4
6
RS+
RS-
External Sense Resistor Power-Side Connection
External Sense Resistor Load-Side Connection
Ground
A2
B1
1, 2
3
3
GND
OUT
N.C.
B2
1
Output Voltage. V
is proportional to V
= V
- V
.
OUT
SENSE
RS+
RS-
—
—
2, 5
No Connection. Not internally connected.
_______________________________________________________________________________________
5
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
Typical Operating Circuit
I
LOAD
R
SENSE
V
BATT
= 1.6V TO 28V
RS+
RS-
9
R
1
R
1
V
DD
= 3.3V
LOAD
µC
P
MAX9938
OUT
ADC
R
OUT
10kΩ
GND
same value as R to minimize offset voltage. The cur-
1
Detailed Description
rent through R is sourced by a high-voltage p-channel
1
The MAX9938 unidirectional high-side, current-sense
amplifier features a 1.6V to 28V input common-mode
range. This feature allows the monitoring of current out
of a battery with a voltage as low as 1.6V. The
MAX9938 monitors current through a current-sense
resistor and amplifies the voltage across that resistor.
FET. Its source current is the same as its drain current,
which flows through a second gain resistor, R
. This
OUT
produces an output voltage, V
, whose magnitude is
OUT
I
x R
x R
/R . The gain accuracy is
LOAD
SENSE
OUT 1
based on the matching of the two gain resistors R and
1
R
(see Table 1). Total gain = 25V/V for the
OUT
The MAX9938 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
MAX9938T, 50V/V for the MAX9938F, 100V/V for the
MAX9938H, and 200V/V for the MAX9938W. The output
is protected from input overdrive by use of an output
current limiting circuit of 7mA (typical) and a 6V clamp
protection circuit.
RS+, which has a value of R , such that its voltage drop
1
equals the voltage drop across an external sense resis-
tor, R
. There is an internal resistor at RS- with the
SENSE
Table 1. Internal Gain Setting Resistors (Typical Values)
GAIN (V/V)
R (Ω)
1
R
(kΩ)
OUT
200
100
50
100
100
200
400
20
10
10
10
25
6
_______________________________________________________________________________________
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
MAX938
Efficiency and Power Dissipation
Applications Information
Choosing the Sense Resistor
based on the following criteria:
At high current levels, the I2R losses in R
can be
SENSE
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
Choose R
SENSE
Voltage Loss
value causes the power-source voltage
allowed to heat up excessively. The precision V
of
OS
A high R
SENSE
the MAX9938 allows the use of small sense resistors to
reduce power dissipation and reduce hot spots.
to drop due to IR loss. For minimal voltage loss, use the
lowest R
value.
SENSE
Kelvin Connections
OUT Swing vs. V
and V
SENSE
RS+
Because of the high currents that flow through R
,
SENSE
The MAX9938 is unique since the supply voltage is the
input common-mode voltage (the average voltage at
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.
RS+ and RS-). There is no separate V
supply voltage
CC
pin. Therefore, the OUT voltage swing is limited by the
minimum voltage at RS+.
Optional Output Filter Capacitor
When designing a system that uses a sample-and-hold
stage in the ADC, 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 capacitor across OUT and
V
OUT
(max) = V
(min) - V
(max) - V
OH
RS+
SENSE
and
V
(max)
OUT
R
=
SENSE
G×I
(max)
LOAD
GND to hold V
constant during sampling. This also
OUT
decreases the small-signal bandwidth of the current-
sense amplifier and reduces noise at OUT.
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
Input Filters
Some applications of current-sense amplifiers need to
measure currents accurately even in the presence of both
differential and common-mode ripple, as well as a wide
variety of input transient conditions. For example, high-fre-
quency ripple at the output of a switching buck or boost
regulator results in a common-mode voltage at the inputs
of the MAX9938. Alternatively, fast load-current transients,
when measuring at the input of a switching buck or boost
regulator, can cause high-frequency differential sense
voltages to occur at the inputs of the MAX9938, although
the signal of interest is the average DC value. Such high-
frequency differential sense voltages may result in a volt-
age offset at the MAX9938 output.
mately 120mV (gain of 25V/V), 60mV (gain of 50V/V),
30mV (gain of 100V/V), or 15mV (gain of 200V/V) of
sense voltage for the full-scale current in each applica-
tion. These can be increased by use of a higher mini-
mum input voltage.
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). For the MAX9938, V
= 500µV (max)
OS
and gain error is 0.5% (max). Use the linear equation:
V
OUT
= (gain GE) x V (gain x V
)
OS
SENSE
to calculate total error. A high R
value allows lower
SENSE
currents to be measured more accurately because off-
sets are less significant when the sense voltage is larger.
_______________________________________________________________________________________
7
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
The MAX9938 allows two methods of filtering to help
improve performance in the presence of input common-
mode voltage and input differential voltage transients.
Figure 1 shows a differential input filter.
Placing RIN at the RS- input does not affect the gain
error of the device because the gain is given by the
ratio between R and R1 at RS+.
OUT
Figure 2 shows the input common-mode filter.
The capacitor CIN between RS+ and RS- along with the
resistor RIN between the sense resistor and RS- helps
filter against input differential voltages and prevents
them from reaching the MAX9938.
Again, the corner frequency of the filter is determined
by the choice of R , C and is affected by R1.
IN IN
In this case R affects both gain error and input offset
IN
voltage. R should be smaller than R1 so that it has
IN
9
The corner frequency of this filter is determined by the
choice of RIN, CIN, and the value of the input resis-
tance at RS- (R1). See Table 1 for R1 values at the dif-
ferent gain options.
negligible effect on the device gain. If, for example, a fil-
ter with R = 10Ω and C = 1µF is built, then depend-
IN
IN
ing upon the gain selection, the gain error is affected by
either 2.5% (G = 25V/V, R1 = 400Ω) or 5% (G = 50V/V,
R1 = 200Ω) or 10% (G = 100V/V, R1 = 100Ω).
The value of RIN should be chosen to minimize its
effect on the input offset voltage due to the bias current
at RS-. RIN x I
contributes to the input voltage off-
BIAS
set. I
is typically 0.2µA.
BIAS
R
SENSE
R
SENSE
R
R
IN
IN
R
IN
LOAD
LOAD
C
IN
C
IN
C
IN
RS+
RS-
RS+
RS-
OUT
OUT
MAX9938
MAX9938
GND
GND
Figure 1. Differential Input Filter
Figure 2. Input Common-Mode Filter
8
_______________________________________________________________________________________
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
MAX938
Bidirectional Application
UCSP Applications Information
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 yields an accurate measure of the charge and
discharge currents respectively (Figure 3).
For the latest application details on UCSP construction,
dimensions, tape carrier information, PCB techniques,
bump-pad layout, and recommended reflow tempera-
ture profile, as well as the latest information on reliabili-
ty testing results, refer to the Application Note 1891:
Wafer-Level Packaging (WLP) and Its Applications
available on Maxim’s website at www.maxim-
ic.com/ucsp.
I
LOAD
R
SENSE
TO WALL-CUBE/
CHARGER
V
= 1.6V TO 28V
BATT
RS+
RS-
RS+
RS-
LOAD
R
1
R
R
1
R
1
1
P
P
V = 3.3V
DD
MAX9938
MAX9938
OUT
OUT
R
R
OUT
10kΩ
10kΩ
OUT
µC
GND
GND
ADC
ADC
Figure 3. Bidirectional Application
Chip Information
PROCESS: BiCMOS
_______________________________________________________________________________________
9
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
PACKAGE TYPE
2 x 2 UCSP
5 SOT23
PACKAGE CODE
B4+1
DOCUMENT NO.
21-0117
U5-2
21-0057
MAX938
6 µDFN
L622+1
21-0164
PACKAGE OUTLINE, 2x2 UCSP
1
21-0117
G
1
10 ______________________________________________________________________________________
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
MAX938
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
______________________________________________________________________________________ 11
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
A
b
D
e
N
MAX938
AAA
AAA
SOLDER
MASK
COVERAGE
E
PIN 1
0.10x45∞
L
L1
1
PIN 1
INDEX AREA
SAMPLE
MARKING
A
A
7
(N/2 -1) x e)
C
L
C
L
b
L
L
A
e
e
A2
EVEN TERMINAL
ODD TERMINAL
A1
PACKAGE OUTLINE,
6, 8, 10L uDFN, 2x2x0.80 mm
1
2
21-0164
B
12 ______________________________________________________________________________________
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
MAX938
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
COMMON DIMENSIONS
SYMBOL
MIN.
0.70
0.15
0.020
1.95
1.95
0.30
NOM.
0.75
0.20
0.025
2.00
2.00
0.40
MAX.
0.80
0.25
0.035
2.05
2.05
0.50
A
A1
A2
D
-
E
L
L1
0.10 REF.
PACKAGE VARIATIONS
PKG. CODE
L622-1
N
6
e
b
(N/2 -1) x e
0.65 BSC 0.30±0.05 1.30 REF.
0.50 BSC 0.25±0.05 1.50 REF.
0.40 BSC 0.20±0.03 1.60 REF.
L822-1
8
L1022-1
10
PACKAGE OUTLINE,
6, 8, 10L uDFN, 2x2x0.80 mm
2
2
21-0164
B
______________________________________________________________________________________ 13
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES CHANGED
0
1
2
4/08
9/08
2/09
Initial release
—
1, 2, 4, 5, 9
1
Added µDFN package information
Added G45 designation to part number
Added Input Filters section and MAX9938W to the data
sheet
MAX938
3
10/09
1, 2, 6–9
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.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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