MAX4080FAUV MAXIM [Maxim Integrated Products], MAX4080FAUV Datasheet

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MAX4080FAUV

Manufacturer Part Number
MAX4080FAUV
Description
76V, High-Side, Current-Sense Amplifiers with Voltage Output
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
1.MAX4080FAUV.pdf (14 pages)
The MAX4080/MAX4081 are high-side, current-sense
amplifiers with an input voltage range that extends from
4.5V to 76V making them ideal for telecom, automotive,
backplane, and other systems where high-voltage cur-
rent monitoring is critical. The MAX4080 is designed for
unidirectional current-sense applications and the
MAX4081 allows bidirectional current sensing. The
MAX4081 single output pin continuously monitors the
transition from charge to discharge and avoids the
need for a separate polarity output. The MAX4081
requires an external reference to set the zero-current
output level (V
resented by an output voltage from V
discharge current is given from V
For maximum versatility, the 76V input voltage range
applies independently to both supply voltage (V
and common-mode input voltage (V
current monitoring does not interfere with the ground
path of the load being measured, making the
MAX4080/MAX4081 particularly useful in a wide range
of high-voltage systems.
The combination of three gain versions (5V/V, 20V/V,
60V/V = F, T, S suffix) and a user-selectable, external
sense resistor sets the full-scale current reading and its
proportional output voltage. The MAX4080/MAX4081
offer a high level of integration, resulting in a simple,
accurate, and compact current-sense solution.
The MAX4080/MAX4081 operate from a 4.5V to 76V sin-
gle supply and draw only 75µA of supply current. These
devices are specified over the automotive operating
temperature range (-40°C to +125°C) and are available
in a space-saving 8-pin µMAX
19-2562; Rev 4; 7/11
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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.
76V, High-Side, Current-Sense Amplifiers with
Automotive (12V, 24V, or 42V Batteries)
48V Telecom and Backplane Current
Measurement
Bidirectional Motor Control
Power-Management Systems
Avalanche Photodiode and PIN-Diode Current
Monitoring
General System/Board-Level Current Sensing
Precision High-Voltage Current Sources
SENSE
________________________________________________________________ Maxim Integrated Products
= 0V). The charging current is rep-
General Description
®
or SO package.
REF
Applications
to GND.
REF
RS+
to V
). High-side
CC
, while
CC
)
o Wide 4.5V to 76V Input Common-Mode Range
o Bidirectional or Unidirectional I
o Low-Cost, Compact, Current-Sense Solution
o Three Gain Versions Available
o ±0.1% Full-Scale Accuracy
o Low 100µV Input Offset Voltage
o Independent Operating Supply Voltage
o 75µA Supply Current (MAX4080)
o Reference Input for Bidirectional OUT (MAX4081)
o Available in a Space-Saving, 8-Pin µMAX Package
Ordering Information continued at end of data sheet.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Selector Guide appears at end of data sheet.
MAX4080FAUA+
MAX4080FAUA/V+
MAX4080FASA+
MAX4080TAUA+
MAX4080TAUA/V+
MAX4080TASA+
MAX4080SAUA+
MAX4080SAUA/V+
MAX4080SASA+
TOP VIEW
GND
N.C.
RS+
V
CC
5V/V (MAX4080F/MAX4081F)
20V/V (MAX4080T/MAX4081T)
60V/V (MAX4080S/MAX4081S)
1
2
4
3
PART
+
µMAX/SO
MAX4080
Voltage Output
6
8
7
5
Ordering Information
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
RS-
N.C.
N.C.
OUT
Pin Configurations
GND
N.C.
RS+
V
CC
1
2
4
3
+
SENSE
µMAX/SO
MAX4081
Features
PIN-PACKAGE
8 µMAX
8 µMAX
8 SO
8 µMAX
8 µMAX
8 SO
8 µMAX
8 µMAX
8 SO
6
8
7
5
RS-
REF1A
REF1B
OUT
1

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MAX4080FAUV Summary of contents

Page 1

Rev 4; 7/11 76V, High-Side, Current-Sense Amplifiers with General Description The MAX4080/MAX4081 are high-side, current-sense amplifiers with an input voltage range that extends from 4.5V to 76V making them ideal for telecom, automotive, backplane, and other systems where high-voltage ...

Page 2

High-Side, Current-Sense Amplifiers with Voltage Output ABSOLUTE MAXIMUM RATINGS V to GND ............................................................-0.3V to +80V CC RS+, RS- to GND....................................................-0.3V to +80V OUT to GND.............-0.3V to the lesser of +18V or (V REF1A, REF1B to GND (MAX4081 Only)....-0.3V to ...

Page 3

High-Side, Current-Sense Amplifiers with DC ELECTRICAL CHARACTERISTICS (continued 4.5V to 76V RS+ REF1A T , unless otherwise noted. Typical values are at T MAX PARAMETER SYMBOL OUT Low Voltage REF1A = ...

Page 4

High-Side, Current-Sense Amplifiers with Voltage Output AC ELECTRICAL CHARACTERISTICS ( 4.5V to 76V RS+ REF1A unless otherwise noted. Typical values are MIN MAX ...

Page 5

High-Side, Current-Sense Amplifiers with ( 48V 0V RS+ SENSE LOAD INPUT OFFSET VOLTAGE HISTOGRAM -125 -100 -75 -50 - 100 ...

Page 6

High-Side, Current-Sense Amplifiers with Voltage Output ( 48V 0V RS+ SENSE LOAD MAX4080 SUPPLY CURRENT vs LOAD SENSE ...

Page 7

High-Side, Current-Sense Amplifiers with ( 48V 0V RS+ SENSE LOAD MAX4081F SMALL-SIGNAL TRANSIENT RESPONSE MAX4080 toc19 INPUT 10mV/div OUTPUT 50mV/div 20µs/div MAX4080F LARGE-SIGNAL TRANSIENT RESPONSE MAX4080 toc22 INPUT 400mV/div OUTPUT 2V/div 20µs/div ...

Page 8

High-Side, Current-Sense Amplifiers with Voltage Output ( 48V 0V RS+ SENSE LOAD V -TRANSIENT RESPONSE CC MAX4080 toc28 V = 20V RS 40V 20V STEP ...

Page 9

High-Side, Current-Sense Amplifiers with PIN NAME MAX4080 MAX4081 — 6 REF1B — 7 REF1A Detailed Description The MAX4080/MAX4081 unidirectional and bidirectional high-side, current-sense amplifiers feature ...

Page 10

High-Side, Current-Sense Amplifiers with Voltage Output I LOAD 4.5V TO 76V V SENSE BATTERY R SENSE RS MAX4081T Figure 1. MAX4081T OUT Transfer Curve V SENSE I LOAD R SENSE RS+ RS MAX4080 ...

Page 11

High-Side, Current-Sense Amplifiers with Table 1. Typical Component Values FULL-SCALE LOAD CURRENT-SENSE CURRENT, I (A) RESISTOR (mΩ) LOAD 0.500 0.125 0.050 5.000 1.250 0.500 50.000 12.500 5.000 FULL-SCALE LOAD CURRENT-SENSE CURRENT, I (A) RESISTOR (mΩ) LOAD 1.000 0.250 0.100 ...

Page 12

High-Side, Current-Sense Amplifiers with Voltage Output LOAD R SENSE RS+ RS REF1A MAX4081 REF1B GND Figure 4. MAX4081 Reference Inputs The full-scale output voltage is V OUT  A , for the MAX4080 and ...

Page 13

High-Side, Current-Sense Amplifiers with Power Management The bidirectional capability of the MAX4081 makes it an excellent candidate for use in smart battery packs. In the application diagram (Figure 5), the MAX4081 moni- tors the charging current into the battery ...

Page 14

High-Side, Current-Sense Amplifiers with Voltage Output REVISION REVISION NUMBER DATE 0 10/02 Initial release 1 11/08 Added values for RG1 and RG2 2 5/09 Added lead-free and automotive parts to Ordering Information 3 5/10 Removed automotive part and added ...

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