Overview

 


Suggested Components

 
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Battery Monitors: 1 Li+ Cell Battery Packs (< 4.4V Battery Voltage)



DATA SHEETS
Part Number Description Key Advantages
MAX9634 1µA, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier

Industry's Smallest Current-Sense Amp: 1mm x 1mm with ICC < 1µA, VOS < 250µV, Gain Error < 0.5%
DS2746 Low-Cost, 2-Wire Battery Monitor with Ratiometric A/D Inputs

2-Wire Fuel Gauge Measures Battery Current and Voltage and Includes Ratiometric Voltage Inputs that Can Be Used to Sample Thermistor, Pack ID, or Another Voltage Source
DS2756 High-Accuracy Battery Fuel Gauge with Programmable Suspend Mode

Provides Key Hardware Components Required to Accurately Estimate Remaining Capacity by Integrating Low-Power Precision Measurements of Temperature, Voltage, Current, Current Accumulation, and Nonvolatile Data Storage
DS2745 Low-Cost I²C Battery Monitor

Low-cost battery fuel gauge that monitors current, voltage, and temperature
DS2740 High-Precision Coulomb Counter

High-Precision Battery Fuel Gauge Costs Less than $1.00 Ideal for Handheld Products



Key Specifications:

Battery Protectors, Selectors and Monitors
Part Number Functions Battery Type Interface User Data Storage
(Bytes)
Parameters Measured VSUPPLY
(V)
VSUPPLY
(V)
Package/Pins Smallest Available Pckg.
(mm2)
Oper. Temp.
(°C)
min max max w/pins
DS2746  Fuel Gauge
1 Cell Li-Ion
3-Cell NiMH
2-Wire -
Current
Voltage
2.5 5.5
TDFN-EP/10
9.6 -40 to +85
DS2756  1-Wire
8 SRAM
96 EEPROM
Current
Temperature
Voltage
3
TSSOP/8
20.3
DS2745  2-Wire -
Current
Temperature
Voltage
2.5
µMAX/8
15.6
DS2740  1-Wire - Current 2.7
µMAX/8
15.6
See All Battery Protectors, Selectors and Monitors (34)

Current Sense Amplifiers
Part Number CMVR
(V)
CMVR
(V)
VCC
(V)
VCC
(V)
ICC
(µA)
Bi-Dir. Curr. Sense VSENSE_FS
(mV)
VOS @25°C
(µV)
Gain Gain Accuracy @25°C
(%)
BW
(kHz)
Comp-
arators
Oper. Temp.
(°C)
Package/Pins
min max min max typ recomm. max max @ -3dB
MAX9634  1.6 28 1.6 28 1 No
25
50
100
250
25 V/V
50 V/V
100 V/V
200 V/V
0.5
15
30
60
125
0 -40 to +85
SOT/5
UCSP(R)/4
See All Current Sense Amplifiers (36)





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