MAX472EPA+ Maxim Integrated, MAX472EPA+ Datasheet - Page 2

• Manufacturer Part Number: MAX472EPA+
• Description: Special Purpose Amplifiers
• Manufacturer: Maxim Integrated
• Series: MAX471, MAX472r

Specifications of MAX472EPA+

• Rohs: yes
• Number Of Channels: Single
• Input Offset Voltage: 0.14 mV
• Operating Supply Voltage: 5 V, 9 V, 12 V, 15 V
• Supply Current: 0.02 mA
• Maximum Power Dissipation: 727 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 [phone]
__________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