1Motorola Sensor Device Data
Based on a unique capacitive cell, this relative humidity sensor is designed for high
volume, low cost applications such as office automation, automotive air cabin monitoring,
home appliances and industrial process control systems.
Main Features
•Full Interchangeability with No Calibration Required
•Instantaneous Desaturation After Long Periods in Saturation Phase
•Compatible with Automated Assembly Processes, including water immersion
•Metal Package for Through Hole Applications
•High Reliability and Long Term Stability
•Patented Solid Polymer Structure
•Suitable for Linear Voltage or Frequency Output Circuitry
•Fast Response Time — 10 Seconds Typical
MAXIMUM RATINGS (TA = 23°C unless otherwise noted)
Rating Symbol Value Unit
Operating Temperature (See Chart 1) TA
*
40 to 100 °C
Storage Temperature Tstg
*
40 to +125 °C
Supply Voltage VS10 Vac
Humidity Operating Range (See Chart 1) RH 0 to 100 %RH
ELECTRICAL CHARACTERISTICS (TA = 23°C unless otherwise noted)
Characteristic Symbol Min Typ Max Unit
Humidity Measuring Range RH 5.0 — 97 %
Supply Voltage VS— 5.0 7.0 Vdc
Nominal Capacitance (at 55%RH) C 175 180 185 pF
Temperature Coefficient of Capacitance TCc — 0.04 — pF/°C
Sensitivity ∆%RH/∆C 2.19 2.21 2.23 %RH/pF
Recovery Time (after 150h in 100%RH) t — 10 — s
Humidity Hysteresis — — +/
*
1.5 — %RH
Long Term Stability — — 0.5 — %RH/yr
Response T ime (33 to 76%RH, flow rate 1m/sec) t — 10 — s
Linearity (10 to 97%RH), theoretical line, Fig. 1(2) — — +/
*
1 — %RH
Linearity (10 to 97%RH), straight line, Fig. 1(1) — — +/
*
3 — %RH
Leakage Current Ix— — 1.0 nA
NOTES:
1. Linearity output deviation from a straight line relationship with relative humidity, using end point method, with Figure 1 generated using
Circuit 1 “Schematic for Frequency Output’’.
2. Linearity output deviation utilizing least squares fit to the graph in Figure 1 generated using Circuit 1 “Schematic for Frequency Output’’.
Senseon is a trademark of Motorola, Inc.
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
Order this document
by XHS1100/D
SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1997
HUMIDITY SENSOR
(0 to 100% RH)
ÄÄ
ÄÄ
XHS1100
2 Motorola Sensor Device Data
TA (
_
C)
0
RH (%)
–40
20
40
60
80
100
120
140
160
–20
–10
0
10
20
30
40
50
60
70
80
90
100
% RH
g/m3
Chart 1. Operating Range
XHS1100
3Motorola Sensor Device Data
R1 = 470 K
R2 = 909 K
R1
MHS1100
FOUT
VCC
GND
R2
NC
8
6
51
3
2
4
7
555
Circuit 1. Schematic for Frequency Output
RELATIVE HUMIDITY (RH)
5900
5700
6100
6500
6300
6700
6900
7100
7300
10 20 30 40 50 60 70 80 90 100
FREQUENCY (Hz)
Theoretical Curve: F= 7298,9 – 14,579*RH + 0.07781*RH2 – 0,00007507*RH3
F: Frequency in Hz
RH: Relative Humidity in %
Reference point at 6600 Hz = 55% RH
LINEARITY – STRAIGHT LINE FIT
Figure 1. Frequency vs. Humidity
XHS1100
4 Motorola Sensor Device Data
Vout = 0,02*RH + 1,5
V in Volts, with RH in %
All resistors 1%
D1 = 1N4148 or similar
D2 = 1,4 V diode (BZV86 or
dual series BAV99)
R1 = 562 K
R2 = 49,9 K
R3 =
R4 = 90,9 K
R5 = 100 K
R6 = 51,1 K
R7 = 178 K
R8 = 49,9 K
R9 = 121 K
R10 = 562 K
R11 = 267 K
C1 = 120 pF (1%)
C2 = 0,1
µ
F
C3 = 2,2
η
F
C4 = 2,2
µ
F
IC = Cmos OP amp
(TLC2272)
R2
R1 D1
R5
C1
R3
R4
D2
MHS1100
R11
R6
R7
R8
R10
C3
C2 R9 C4
VOUT
VCC
GND
Circuit 2. Schematic for Linear Voltage Output with Rail–to–Rail Op Amp
50 1000
0
1
2
3
4
5
Figure 2.
RH in %
OUT
V IN VOLTS
XHS1100
5Motorola Sensor Device Data
Vout = 0,01*RH + 1,5
V in Volts, with RH in %
All resistors 1%
R1 = 383 K
R2 = 100 K
R3 = 66,5 K
R4 = 100 K
R5 = 499 K
R6 = 30,1 K
R7 = 1 M
R8 = 26,7 K
R9 = 20 K
R10 = 154 K
T1 = MMBT3904
C1 = 220 pF (1%)
C2 = 47
η
F
C3 = 4,7
η
F
C4 = 2,2
µ
F
IC = LM358 or eq
R1 R2 IC1 R5
R6 R7 R8
R4
R3
MHS1100
T1
C1 C2
R10
R9
IC1
C3
C4
GND
VOUT
VCC
Circuit 3. Schematic for Linear Voltage Output with Low Cost Op Amp
RH in %
50 1000
0
1
2
3
4
5
Figure 3.
OUT
V IN VOLTS
XHS1100
6 Motorola Sensor Device Data
DIM MIN MAX
A9.02 9.29
B8.01 8.50
C3.65 3.90
D12.70 19.05
E0.35 0.45
F0.50 0.90
G45 BSC
H0.74 1.01
J0.72 0.86
K5.08 BSC
E
G
HJ
K
D
C
B
F
A
_
DIMENSIONS IN MILLIMETERS
XHS1100
7Motorola Sensor Device Data
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
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applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
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arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
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Opportunity/Af firmative Action Employer.
XHS1100
8 Motorola Sensor Device Data
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XHS1100/D
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