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Details, datasheet, quote on part number:US5781E
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Datasheet text preview:
3
eatures and Benefits
Chopper stabilized amplifier stage New miniature package / thin, high reliability package Operation down to 3.5V CMOS for optimum stability, quality, and cost
· · · · A · · · ·
pplications
Solid state switch Limit switch Current limit Interrupter
Part No. US5781 US5781 US5781 US5781
F
Ordering Information
Temperature Suffix E ( -40°C to 85°C ) E ( -40°C to 85°C ) L ( -40°C to 150°C ) L ( -40°C to 150°C ) Package Code SO (SOT-23) UA (TO-92 flat) SO (SOT-23) UA (TO-92 flat)
Functional Diagram
Description
The US5781 is a unipolar Hall effect sensor IC fabricated from mixed signal CMOS technology. It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There are many applications for this sensor in addition to those listed above. The design, specifications and performance have been optimized for applications of solid state switches. The output transistor will be switched on (BOP) in the presence of a sufficiently strong South pole magnetic field facing the marked side of the package. Similarly, the output will be switched off (BRP) in the presence of a weaker South field and remain off with "0" field. The SOT-23 device is magnetically reversed from the UA package. The SOT-23 output transistor will be switched on (BOP) in the presence of a sufficiently strong North pole magnetic field subjected to the marked face.
VDD
Output
Voltage Regulator
Cho ppe r
GND UA Package Pin 1 - VDD Pin 2 - GND Pin 3 - Output SO Package Pin 1 - VDD Pin 2 - Output Pin 3 - GND
Note: This is a static-sensitive device; please observe ESD precautions. Reverse VDD protection is not included. For reverse voltage protection, a 100W resistor in series with VDD is recommended.
901005781 Rev. 008
Page 1
Aug/02
U
S5781 Electrical Specifications
DC operating parameters: TA = 25oC, VDD = 12VDC (unless otherwise specified).
Parameter
Supply Voltage Supply Current Saturation Voltage Output Leakage Output Rise Time Output Fall Time
Symbol Test Conditions
V DD I DD VDS(on) IOFF tr tf Operating BBOP BMin
3.5 0.5
Typ
2.5 0.3 0.01 0.04
Max
24 5.0 0.5
Units
V mA V A
10.0
s s
0.18
U
S5781 Magnetic Specifications
Magnetic operating parameters: TA = 25oC, VDD =12 VDC (unless otherwise specified).
Parameter
Operating Point Release Point Hysteresis Note: 1 mT = 10 Gauss.
Symbol Test Conditions
BOP BRP Bhys
Min
7.0 3.5 2.0
Typ
12.0 7.0 5.0
Max
15.0 10.0 7.0
Units
mT mT mT
3901005781 Rev. 008
Page 2
Aug/02
3
Performance Graphs
Typical Magnetic Switch Points versus Temperature
5781
14
Flux Density (mT)
12
BOP
9
BRP
6
BHyS
3
0 -40 0 40 80 120 150
Temperature (ºC)
Min/Max Magnetic Sw it ch Ran g e Versus Tem p e r at u r e 16 14 F lu x Density mV/mT 12 10
BRP Max
5781
BOP Max
8 6 4 2 0
- 4 0 -2 0 0 20 4 0 6 0 8 0 10 0 12 0 14 0
BOP Min
BRP Min
T e m p e r at u r e C°
901005781 Rev. 008
Page 3
Aug/02
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