參數(shù)資料
型號(hào): US3881LSO
廠商: Electronic Theatre Controls, Inc.
英文描述: CMOS Low Voltage Hall Effect Latch
中文描述: CMOS低電壓霍爾效應(yīng)鎖存
文件頁數(shù): 1/6頁
文件大小: 117K
代理商: US3881LSO
US3881
CMOS Low Voltage Hall Effect Latch
US3881 CMOS Low Voltage Hall Effect Latch 3901003881 Rev 4.2 7/23/01 Page 1
Features and Benefits
Chopper stabilized amplifier stage
Optimized for BDC motor applications
New miniature package / thin, high reliability package
Operation down to 2.2V
CMOS for optimum stability, quality, and cost
Applications
Solid state switch
Brushless DC motor commutation
Speed sensing
Linear position sensing
Angular position sensing
Current sensing
Ordering Information
Part No. Temperature Suffix Package Temperature Range
US3881 E SO or UA -40
o
C to 85
o
C Commercial
US3881 L SO or UA -40
o
C to 150
o
C Automotive
* Contact factory or Sale Representative for legacy temperature options
Description
The US3881 is a bipolar Hall effect sensor IC fabri-
cated from mixed signal CMOS technology. It in-
corporates advanced chopper stabilization tech-
niques to provide accurate and stable magnetic
switch points. There are many applications for this
sensor in addition to those listed above. The de-
sign, specifications, and performance have been
optimized for commutation applications in 5V and
12V brushless DC motors.
The output transistor will be latched on (B
OP
) in the
presence of a sufficiently strong South pole mag-
netic field facing the marked side of the package.
Similarly, the output will be latched off (B
RP
) in the
presence of a North field.
The SOT-23 device is reversed from the UA pack-
age. The SOT-23 output transistor will be latched
on in the presence of a sufficiently strong North
pole magnetic field subjected to the marked face.
Functional Diagram
Note:
Static sensitive device; please observe ESD precautions. Re-
verse V
protection is not included. For reverse voltage protec-
tion, a 100
W
resistor in series with V
DD
is recommended.
Output
GND
V
DD
Voltage
Regulator
Chopper
SO Package
Pin 1 - V
DD
Pin 2 - Output
Pin 3 - GND
UA Package
Pin 1 - V
DD
Pin 2 - GND
Pin 3 - Output
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