LTC6943 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC6943
Linear Technology
'LTC6943' PDF : 16 Pages View PDF
TYPICAL APPLICATIO S
LTC6943
Battery Powered Relative Humidity Sensor Signal Conditioner
+9
4.7k 2.32k* 10k
5%
TRIM
LT1004
1.2V
1.8k*
500Ω
90%
TRIM
SENSOR RESPONSE
RH%
5
25
50
75
90
CAPACITANCE
379.3pF
413.3pF
455.8pF
498.3pF
523.8pF
0.1
100pF≤
+9
2
3 15
16
0.1
11
13
LTC6943
12
10
0.1µF
0.1
SENSOR
22M
9
6
7
4
5
1
10pF≤
+9
–
A1
LT1006
+
OUTPUT
0-1.00V =
0-100% RH
* = 1% FILM RESISTOR
≤ = POLYPROPYLENE
SENSOR = PANAMETRICS TYPE RHS
500pF AT RH = 76% 1.7pF/RH
6943 TA17
5V Powered, Frequency Output, Relative Humidity Sensor Signal Conditioner
125kHz
1N4148
80.6k*
OUT
RSET
5V
LTC1799
O1
GND
VIN
5V
LTC6943
14
13.3k*
4V
6
7
0.1µF
9
SENSOR
10
1k*
CHARGE
PUMP
1µF
11
12
15
4V
3
5V
200Ω
TO ALL 4V
POINTS
562k*
100k
RH = 25% TRIM
(204.5pF)
4V
10k
BAT85
10k
4V
S
D
Q1
VN2222L
1000pF†
5V
–
A1
LTC1050
+
INTEGRATOR
4V
300k*
CLOCK
RESET
COMPARATOR
L 5V
+
C1 +V Q
LT1671
–
Q
1µF
LT1634
4V
4V
1N5712
OUT
0% TO 100% RH =
110k*
300pF
0Hz TO 1kHz
* = 1% METAL FILM RESISTOR
† = WIMA, TYPE MKP-2
SENSOR = PANAMETRICS MC-2
0% RH = 196.7pF
100% RH = 227.8pF
0.31pF/RH
20k
RH = 100% TRIM
(227.8pF)
6943 TA20
6943f
13
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