MAX4081TASA-T Maxim Integrated, MAX4081TASA-T Datasheet

no-image

MAX4081TASA-T

Manufacturer Part Number
MAX4081TASA-T
Description
Special Purpose Amplifiers
Manufacturer
Maxim Integrated
Series
MAX4080, MAX4081r
Datasheet

Specifications of MAX4081TASA-T

Number Of Channels
Single
Common Mode Rejection Ratio (min)
100 dB
Input Offset Voltage
0.6 mV
Operating Supply Voltage
5 V, 9 V, 12 V, 15 V
Supply Current
0.103 mA
Maximum Power Dissipation
471 mW
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Supply Voltage - Max
76 V
Supply Voltage - Min
4.5 V
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
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
UCSP is a 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.maximintegrated.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
= 0V). The charging current is rep-
Functional Diagrams
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
MAX4080/MAX4081
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
EVALUATION KIT AVAILABLE
Pin Configurations
GND
RS+
N.C.
V
CC
1
2
4
3
+
SENSE
µMAX/SO
MAX4081
19-2562; Rev 4; 7/11
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

Related parts for MAX4081TASA-T

MAX4081TASA-T Summary of contents

Page 1

... Precision High-Voltage Current Sources Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...

Page 2

... MIN MAX ±0.1 = +25°C = -40°C to +85° MIN MAX 100 124 100 122 = 1000mV 0.15 = 250mV = 100mV = MIN MAX UNITS 190 µA 190 2 µA 12 µA mV V/V ±0.6 ±1 % ±1.2 ±0.6 ±1 mV ±1 0.27 V Maxim Integrated ...

Page 3

... OUT Low Voltage REF1A = REF1B Input Voltage Range (MAX4081 Only) REF1A Input Voltage Range (MAX4081 Only) REF1A Rejection Ratio (MAX4081 Only) REF/REF1A Ratio (MAX4081 Only) REF1A Input Impedance (MAX4081 Only) Maxim Integrated = (MAX4081 only), V REF1B SENSE = +25°C.) (Notes SYMBOL CONDITIONS ...

Page 4

... V . REF1B is usually connected to REF1A or GND. REF1A REF1B . RS 0V 100kΩ, C RS+ RS- LOAD MIN TYP 250 150 20 20 500 0.1 = 100mV ( Note )/ OUT REF V = 20pF, LOAD MAX UNITS kHz µs pF Ω µs µs = 0V, for the SENSE Maxim Integrated ...

Page 5

... REFERENCE REJECTION RATIO vs. FREQUENCY 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 1 10 100 1k 10k FREQUENCY (Hz) Maxim Integrated Typical Operating Characteristics = ∞ 20pF +25°C, unless otherwise noted.) LOAD A INPUT OFFSET VOLTAGE vs. TEMPERATURE 300 250 200 150 100 50 0 -50 -100 -150 -200 -250 ...

Page 6

... 100 150 200 250 0.8 0.9 1.0 I (SINKING) (µA) OUT MAX4080S SMALL-SIGNAL TRANSIENT RESPONSE MAX4080 toc17 INPUT 5mV/div OUTPUT 300mV/div 20µs/div 50 75 100 125 (SINKING +125° 0° -40°C A 300 350 400 450 500 MAX4080 toc18 Maxim Integrated ...

Page 7

... INPUT 400mV/div OUTPUT 2V/div 20µs/div MAX4081F LARGE-SIGNAL TRANSIENT RESPONSE MAX4080 toc25 INPUT 400mV/div OUTPUT 2V/div 20µs/div Maxim Integrated Typical Operating Characteristics (continued) = ∞ 20pF +25°C, unless otherwise noted.) LOAD LOAD A MAX4081T SMALL-SIGNAL TRANSIENT RESPONSE INPUT 2.5mV/div OUTPUT 50mV/div 20µ ...

Page 8

... LOAD A MAX4080F SATURATION RECOVERY RESPONSE (V = 4.5V 5V/div INPUT 500mV/div V OUT 1V/div OUTPUT 2V/div 20µs/div MAX4080T STARTUP DELAY (V = 250mV) SENSE MAX4080 toc29 10V) 5V/div OUTPUT 2.5V/div 100µs/div MAX4080 toc30 Maxim Integrated ...

Page 9

... while discharge current is given from V CC GND. Measurements of OUT with respect positive and negative voltage during charge and dis- charge, as illustrated in Figure 1 for the MAX4081T. Maxim Integrated NAME RS+ Power connection to the external-sense resistor. Supply Voltage Input. Decouple bypass line transients ...

Page 10

... OUT V SENSE 250mV -5V GND REF1A REF1B V SENSE RS- RS MAX4081 CURRENT CURRENT MIRROR MIRROR GND For Gain = 20 (T 60k. For Gain = 60 (S 20k . = OUT 125kΩ REF1B 125kΩ REF1A V REF Maxim Integrated ...

Page 11

... V REF two. V equals V /2 when V OUT REF1A In either mode, the output swings above the reference voltage for positive current-sensing (V output swings below the reference voltage for negative current-sensing (V < RS+ RS- Maxim Integrated GAIN (V/V) 1000 5 1000 20 1000 60 100 5 100 20 100 60 ...

Page 12

... GND Dynamic Range Consideration input capability, the output voltage range SENSE and lower from REF CC Power-Supply Bypassing and Grounding to GND with a 0.1µ independent of the monitored CC can be connected to a separate regulated CC will be subject to fast-line transients, a series , SENSE can be CC Maxim Integrated ...

Page 13

... MAX4080/MAX4081 V = 4.5V TO 76V CC 1.8V BATTERY PROCESS: Bipolar Ordering Information (continued) PART MAX4081FAUA+ MAX4081FASA+ MAX4081TAUA+ MAX4081TASA+ MAX4081SAUA+ MAX4081SASA+ I SENSE + Denotes a lead(Pb)-free/RoHS-compliant package. Unidirectional Unidirectional Unidirectional Unidirectional For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a Unidirectional “ ...

Page 14

... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 14 © 2011 Maxim Integrated DESCRIPTION Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc. Revision History PAGES CHANGED — 10 ...

Related keywords