LTC1040 데이터 시트보기 (PDF) - Linear Technology
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LTC1040 Datasheet PDF : 12 Pages
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TYPICAL APPLICATIO S
Complete Heating/Cooling Automatic Thermostat
5V AT 0.85µA
LTC1040
17
18
20M
4.32k 4.99k
†
LTC1040
5
6
7
8
+
–
+
COMP A
–
4
82k*
† THERMISTOR # 44007
YELLOW SPRINGS INSTRUMENT CO., INC.
*HYSTERESIS = 5V •
82k
20M
= 20mV
5k
TEMP
ADJUST
6.81k
82k*
SEPARATION
(20mV)
14 +
13 –
12
11
+ COMP B
–
9
20M
3
15
16
10
HEAT
COOL
10M
0.1µF
LTC1040 • TA03
28°C
SEPARATION
27°C
AIRCONDITIONING ON
HYSTERESIS
AIRCONDITIONING OFF
HEATER OFF
HYSTERESIS
HEATER ON
HEAT
COOL
TIME
Window Comparator with Independent Window Limits and
Fully Floating Differential Input
LTC1040
VIN
+
–
+ COMP A
VU
–
+
–
VL
+ COMP B
–
AOUT = “1” WHEN
VIN > VU
A+B = “1” WHEN
VU ≥ VIN ≥ VL
BOUT = “1” WHEN
VIN < VL
LTC1040 • TA05
LTC1040 • TA04
Hysteresis Comparator with Fully Floating Differential Input
V+
VIN
VTRIP
+
–
+1/2 LTC1040
OUT
R1 * –
10k
R2
2.49MΩ
OUT = “0” WHEN VIN > VU = VTRIP R2 + (5V) R1 = 0.996 VTRIP + 20mV
R1 + R2
OUT = “1” WHEN VIN < V1 = VTRIP R2 = 0.996VTRIP
R1 + R2
* TO CENTER HYSTERESIS ABOUT VTRIP, FORCE THIS INPUT TO
HYSTERESIS/2 (10mV)
LTC1040 • TA06
1040fa
9
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