Honeywell SS340RT, SS440R User Manual
SS340RT and SS440R
Series
Unipolar Hall-Effect Digital
Position Sensors
DESCRIPTION |
These sensors are available in two package styles. The |
The SS340RT Series and SS440R Series sensors are small, |
SS340RT Series is available in the miniature SOT-23 surface |
versatile digital Hall-effect devices that are operated by the |
mount package; the SS440R is available in the leaded, flat TO- |
magnetic field from a permanent magnet or an electromagnet. |
92-style package. The SS340RT’s small size requires less PC |
They are designed to respond to a single pole: North |
board space, allowing it to be used in smaller assemblies. Its |
(SS340RT Series) or South (SS440R Series). |
3 V capability allows for use in low voltage applications, |
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promoting energy efficiency. |
These unipolar sensors are supplied in three different magnetic |
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sensitivities to meet a wide range of potential applications. The
SS341RT and SS441R offer the highest sensitivity, with a
typical operating point of 85 G at 25 °C [77 °F]; the SS343RT
and SS443R offer medium sensitivity with 125 G typical at
25 °C [77 °F]; the SS349RT and SS449R offer the lowest
sensitivity, requiring 350 G typical to operate at 25 °C [77 °F].
FEATURES/BENEFITS
•Subminiature package size (SS340RT Series) supplied on tape and reel allows for a compact design with automated component placement, helping to reduce manufacturing costs
•Simple activation from a single pole and multiple magnetic sensitivities (high, medium and low) make this product suitable in a variety of potential motion control, lid closure detection, and displacement sensing applications
•Low voltage 3 V capability helps reduce power consumption
•Built-in reverse polarity protection protects the device from potential damage during installation
•Thermally balanced integrated circuit provides for stable operation over a wide temperature range, from -40 °C to 150 °C [-40 °F to 302 °F]
•RoHS-compliant materials meet Directive 2002/95/EC
The SS340RT Series is available on tape and reel (3000 units
per reel); the SS440R Series is available in a bulk package
(1000 units per bag).
POTENTIAL APPLICATIONS
•Door or lid closure detection
•Speed and RPM (revolutions per minute) sensing in fitness equipment
•Flow rate sensing in industrial processes, appliances, or water softeners
•Damper or valve position control in industrial, HVAC or residential or commercial applications
•Robotic control (cylinder position monitoring)
•Float-based fluid level sensing
•Displacement sensor in hospital beds or medical equipment
•Medication bin monitor on portable drug carts
•Printer head position sensing
SS340RT and SS440R Series
Table 1. SS340RT and SS440R Series Specifications (At Vs=3.0 to 24 Vdc, 20 mA load, TA = -40 ºC to 150 ºC [-40 ºF to 257 ºF])
|
Characteristic |
Condition |
Minimum |
Typical |
Maximum |
Unit |
|
Supply voltage:1 |
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|
|
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SS440R Series |
-40 °C to 150 °C [-40 °F to 302 °F] |
3 |
– |
24 |
Vdc |
|
SS340RT Series |
-40 °C to 125 °C [-40 °F to 257 °F] |
3 |
– |
24 |
|
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SS340RT Series |
150 °C [302 °F] |
3 |
– |
12 |
|
|
Supply current |
Vsupply = 5 V at 25 °C [77 °F] |
– |
4 |
6 |
mA |
|
|
Vsupply = 3 V at 25 °C [77 °F] |
– |
3.5 |
5 |
|
|
|
|
– |
– |
8 |
|
|
Vsat |
at 20 mA, gauss >Bop |
– |
– |
0.4 |
Vdc |
|
Output leakage current |
gauss >Bop |
– |
– |
10 |
µA |
|
Output switching time: |
Vsupply = 12 V at 25 °C [77 °F], |
|
|
|
|
|
rise |
– |
– |
1.5 |
µs |
|
|
RL =1.6 kOhm, CL = 20 pF |
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|
fall |
– |
– |
1.5 |
|
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|
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Thermal resistance: |
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|
|
|
|
|
SS440R Series |
– |
– |
233 |
– |
°C/W |
|
SS340RT Series |
|
|
303 |
|
|
|
Operate: |
|
|
|
|
|
|
SS341RT/SS441R |
– |
35 |
85 |
135 |
gauss |
|
SS343RT/SS443R |
45 |
125 |
205 |
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SS349RT/SS449R |
|
240 |
350 |
460 |
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Release: |
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|
|
|
|
|
SS341RT/SS441R |
– |
10 |
50 |
120 |
gauss |
|
SS343RT/SS443R |
40 |
90 |
180 |
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SS349RT/SS449R |
|
135 |
250 |
370 |
|
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Differential: |
|
|
|
|
|
|
SS341RT/SS441R |
– |
5 |
35 |
80 |
gauss |
|
SS343RT/SS443R |
5 |
35 |
120 |
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|
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SS349RT/SS449R |
|
30 |
100 |
170 |
|
|
Operating temperature |
– |
-40 [-40] |
– |
150 [302] |
°C [°F] |
|
Storage temperature |
– |
-40 [-40] |
– |
150 [302] |
°C [°F] |
Note 1. See Figure 1.
Table 2. SS340RT and SS440R Series Absolute Maximum Ratings1
Characteristic |
Minimum |
Typical |
Maximum |
Unit |
Supply voltage |
-28.0 |
– |
28.0 |
V |
Applied output voltage |
-0.5 |
– |
28.0 |
V |
Output current |
– |
– |
20 |
mA |
Magnetic flux |
– |
– |
no limit |
gauss |
Note 1: The magnetic field strength (gauss) required to cause the switch to change state (operate and release) will be as specified in the magnetic characteristics. To test the switch against the specified magnetic characteristics, the switch must be placed in a uniform magnetic field.
NOTICE
Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device. However, the electrical and mechanical characteristics are not guaranteed as the maximum limits (above recommended operating conditions) are approached, nor will the device necessarily operate at absolute maximum ratings.
Figure 1. SS340RT Series Rated Supply Voltage |
Figure 2. Current Sinking Output Block Diagram |
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2 www.honeywell.com/sensing
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