MAX471ESA-T Maxim Integrated, MAX471ESA-T Datasheet - Page 2
![no-image](/images/no-image-200.jpg)
MAX471ESA-T
Manufacturer Part Number
MAX471ESA-T
Description
Special Purpose Amplifiers
Manufacturer
Maxim Integrated
Series
MAX471, MAX472r
Datasheet
1.MAX472CSAT.pdf
(13 pages)
Specifications of MAX471ESA-T
Number Of Channels
Single
Operating Supply Voltage
5 V, 9 V, 12 V, 15 V
Supply Current
0.05 mA
Maximum Power Dissipation
791 mW
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Supply Voltage - Max
36 V
Supply Voltage - Min
3 V
The MAX471/MAX472 are complete, bidirectional, high-
side current-sense amplifiers for portable PCs, tele-
phones, and other systems where battery/DC
power-line monitoring is critical. High-side power-line
monitoring is especially useful in battery-powered sys-
tems, since it does not interfere with the ground paths
of the battery chargers or monitors often found in
“smart” batteries.
The MAX471 has an internal 35mΩ current-sense resis-
tor and measures battery currents up to ±3A. For appli-
cations requiring higher current or increased flexibility,
the MAX472 functions with external sense and gain-set-
ting resistors. Both devices have a current output that
can be converted to a ground-referred voltage with a
single resistor, allowing a wide range of battery volt-
ages and currents.
An open-collector SIGN output indicates current-flow
direction, so the user can monitor whether a battery is
being charged or discharged. Both devices operate
from 3V to 36V, draw less than 100µA over tempera-
ture, and include a 18µA max shutdown mode.
________________________Applications
19-0335; Rev 2; 12/96
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
__________Typical Operating Circuit
_______________General Description
3V
TO
36V
Portable PCs:
Smart Battery Packs
Cellular Phones
Portable Phones
Portable Test/Measurement Systems
Battery-Operated Systems
Energy Management Systems
Notebooks/Subnotebooks/Palmtops
RS+
RS+
SHDN
MAX471
GND
________________________________________________________________ Maxim Integrated Products
SIGN
OUT
RS-
RS-
I
2000
LOAD
100k
2k
I
LOAD or CHARGER
LOGIC
SUPPLY
DISCHARGE/CHARGE
V
LOAD
OUT
(1V/A)
TO
Current-Sense Amplifiers
____________________________Features
_________________Pin Configurations
______________Ordering Information
MAX471CPA
MAX471CSA
MAX471EPA
MAX471ESA
MAX472CPA
MAX472CSA
MAX472EPA
MAX472ESA
Complete High-Side Current Sensing
Precision Internal Sense Resistor (MAX471)
2% Accuracy Over Temperature
Monitors Both Charge and Discharge
3A Sense Capability with Internal Sense Resistor
(MAX471)
Higher Current-Sense Capability with External
Sense Resistor (MAX472)
100µA Max Supply Current
18µA Max Shutdown Mode
3V to 36V Supply Operation
8-Pin DIP/SO Packages
MAX472 Pin Configuration continued on last page.
TOP VIEW
PART
Precision, High-Side
SHDN
GND
RS+
RS+
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
1
2
3
4
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
DIP/SO
MAX471
8
7
6
5
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
PIN-PACKAGE
SIGN
OUT
RS-
RS-
1