MAX4071ATA+T Maxim Integrated Products, MAX4071ATA+T Datasheet

IC AMP CURRENT SENSE 8-TDFN

MAX4071ATA+T

Manufacturer Part Number
MAX4071ATA+T
Description
IC AMP CURRENT SENSE 8-TDFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX4071ATAT.pdf (18 pages)

Specifications of MAX4071ATA+T

Amplifier Type
Current Sense
Number Of Circuits
1
-3db Bandwidth
100kHz
Current - Input Bias
2.4µA
Voltage - Input Offset
80µV
Current - Supply
100µA
Voltage - Supply, Single/dual (±)
2.7 V ~ 24 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-TDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Output Type
-
Current - Output / Channel
-
Slew Rate
-
Gain Bandwidth Product
-
Other names
MAX4071ATA+T
MAX4071ATA+TTR
The MAX4069–MAX4072 low-cost, bidirectional, high-
side, current-sense amplifiers are ideal for monitoring
battery charge and discharge currents in notebooks,
cell phones, and other portable equipment. They fea-
ture up to 24V input common-mode voltage range, low
100µA supply current (which drops to only 10µA in
shutdown), and a total output error of less than 1.5%.
The wide 1.35V to 24V input common-mode range is
independent of the supply voltage, ensuring that the
current-sense feedback remains accurate even when
connected to a battery pack in deep discharge.
To achieve maximum flexibility, an external current-sense
resistor is used along with a Gain Select pin to choose
either 50V/V or 100V/V. A single output pin continuously
monitors the transition from charge to discharge and
avoids the need for a separate polarity output. The
MAX4070 contains an internal 2.5V reference. The
charging current is represented by an output voltage
from 2.5V to V
2.5V to GND. The MAX4071 is similar, but with a refer-
ence voltage of 1.5V. The MAX4069 has an adjustable
reference voltage, set by two external resistors. The
MAX4072 has an input for an external reference.
The MAX4069/MAX4071/MAX4072 operate from a 2.7V to
24V single supply. The MAX4070 operates from a 3.6V to
24V single supply. All devices are specified over the
automotive operating temperature range, -40°C to
+125°C. The MAX4070/MAX4071/MAX4072 are available
in 8-pin µMAX and 8-pin thin QFN packages. The
MAX4069 is available in a 10-pin µMAX
19-2423; Rev 3; 11/08
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configurations and Selector Guide appear at end of
data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Notebook Fuel Gauging
Smart-Battery Packs/Chargers
Motor Control
Power-Management Systems
Cell-Phone Battery-Current Monitoring
CC
, while discharge current is given from
________________________________________________________________ Maxim Integrated Products
Bidirectional, High-Side, Current-Sense
General Description
Applications
®
package.
Amplifiers with Reference
♦ Bidirectional, Compact, Current-Sense Solution
♦ Total Output Error Less than 1.5%
♦ Selectable Gain of 50V/V or 100V/V
♦ Wide 1.35V to 24V Common-Mode Range
♦ 2.7V to 24V Single-Supply Operation
♦ Internal Precision Reference
♦ Low 100µA Supply Current
♦ 10µA Supply Current in Shutdown
♦ Available in Space-Saving Packages
* EP = Exposed pad.
MAX4069AUB
MAX4070AUA
MAX4070ATA
MAX4071AUA
MAX4071ATA
MAX4072AUA
MAX4072ATA
Independent of Supply Voltage
V
Adjustable (MAX4069)
2.50V (MAX4070)
1.50V (MAX4071)
8-Pin Thin QFN (MAX4070/MAX4071/MAX4072)
8-Pin µMAX (MAX4070/MAX4071MAX4072)
10-Pin µMAX (MAX4069)
PART
BATT
V
CC
= 1.35V TO 24V
= 3.6V TO 24V
Typical Operating Circuit
-40°C to +125°C 10 µMAX
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 Thin QFN-EP*
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 Thin QFN-EP*
-40°C to +125°C 8 µMAX
-40°C to +125°C 8 Thin QFN-EP*
TEMP RANGE
V
GSEL
SHDN
Ordering Information
CC
RS-
MAX4070
R
SENSE
GND
RS+
FROM BATTERY
PIN-PACKAGE
REFOUT
CHARGER
OUT
Features
LOAD
TO ADC
2.5V
MARK
TOP
ABN
ABO
ABP
—
—
—
—
1

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MAX4071ATA+T Summary of contents

Page 1

... Notebook Fuel Gauging Smart-Battery Packs/Chargers Motor Control Power-Management Systems Cell-Phone Battery-Current Monitoring µMAX is a registered trademark of Maxim Integrated Products, Inc. Pin Configurations and Selector Guide appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’ ...

Page 2

Bidirectional, High-Side, Current-Sense Amplifiers with Reference ABSOLUTE MAXIMUM RATINGS V , RS+, RS- to GND ...........................................-0.3V to +26V CC OUT to GND ....................-0.3V to Lesser of (V Differential Input Voltage ( ..............................±0. GSEL, ...

Page 3

Bidirectional, High-Side, Current-Sense ELECTRICAL CHARACTERISTICS (continued 2.7V to 24V SENSE unless otherwise noted. Typical values are MIN MAX PARAMETER ...

Page 4

Bidirectional, High-Side, Current-Sense Amplifiers with Reference ELECTRICAL CHARACTERISTICS (continued 2.7V to 24V SENSE unless otherwise noted. Typical values are ...

Page 5

Bidirectional, High-Side, Current-Sense ELECTRICAL CHARACTERISTICS (continued 2.7V to 24V SENSE unless otherwise noted. Typical values are MIN MAX PARAMETER ...

Page 6

Bidirectional, High-Side, Current-Sense Amplifiers with Reference ( 12V 50mV for gain of 100V/V and 75mV for gain of 50V/ RS+ SENSE INPUT OFFSET VOLTAGE DISTRIBUTION ...

Page 7

Bidirectional, High-Side, Current-Sense ( 12V 50mV for gain of 100V/V and 75mV for gain of 50V/ RS+ SENSE MAX4070 REFOUT vs. TEMPERATURE 2.540 2.525 2.510 2.495 2.480 2.465 2.450 -50 - ...

Page 8

Bidirectional, High-Side, Current-Sense Amplifiers with Reference ( 12V 50mV for gain of 100V/V and 75mV for gain of 50V/ RS+ SENSE SMALL-SIGNAL TRANSIENT RESPONSE MAX4069-72 toc19 GAIN = 50 INPUT 5mV/div OUTPUT 200mV/div ...

Page 9

Bidirectional, High-Side, Current-Sense PIN MAX4070/ MAX4069 MAX4072 MAX4071 — — — — — — — ...

Page 10

Bidirectional, High-Side, Current-Sense Amplifiers with Reference Detailed Description The MAX4069–MAX4072 bidirectional, high-side, cur- rent-sense amplifiers are ideal for portable equipment. The wide 1.35V to 24V input common-mode voltage range is independent of the supply voltage, ensuring that the current-sense feedback ...

Page 11

Bidirectional, High-Side, Current-Sense I DISCHARGE RS CELLS GSEL SHDN Figure 2. Bidirectional Current Monitor External Reference (MAX4072) The MAX4072 contains REFIN pin for external refer- ence voltage. The allowable voltage range on REFIN is ≥ 5.1V. 1V ...

Page 12

Bidirectional, High-Side, Current-Sense Amplifiers with Reference Table 1. Recommended Component Values FULL-SCALE CURRENT-SENSE CURRENT RESISTOR (mΩ) (A) 0.075 0.05 0.75 0.5 3.75 2.5 7.5 5.0 15.0 10.0 core metal-film or wire-wound resistors, they are a straight band of ...

Page 13

Bidirectional, High-Side, Current-Sense TOP VIEW SHDN 1 RS- 2 MAX4069 RS+ 3 N.C. 4 GND 5 In order to dissipate sense-resistor heat from large sense currents, solder the RS+ and the RS- pins to large copper traces. Keep the part ...

Page 14

Bidirectional, High-Side, Current-Sense Amplifiers with Reference For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 8 TQFN-EP 8 µMAX 10 µMAX 14 ______________________________________________________________________________________ Package Information PACKAGE CODE T833-2 U8-1 U10-2 DOCUMENT NO. 21-0137 21-0036 21-0061 ...

Page 15

Bidirectional, High-Side, Current-Sense For the latest package outline information and land patterns www.maxim-ic.com/packages. COMMON DIMENSIONS SYMBOL MIN. MAX. A 0.70 0.80 D 2.90 3.10 E 2.90 3.10 A1 0.00 0.05 L 0.20 0.40 k 0.25 MIN. A2 0.20 ...

Page 16

Bidirectional, High-Side, Current-Sense Amplifiers with Reference For the latest package outline information and land patterns www.maxim-ic.com/packages. 16 ______________________________________________________________________________________ Package Information (continued) α α ...

Page 17

Bidirectional, High-Side, Current-Sense For the latest package outline information and land patterns www.maxim-ic.com/packages. ______________________________________________________________________________________ Amplifiers with Reference Package Information (continued) α α 17 ...

Page 18

... 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 ____________________ 18 © 2008 Maxim Integrated Products ...

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