A5348 查看數據表（PDF） - Allegro MicroSystems
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A5348 Datasheet PDF : 9 Pages
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A5348
Ionization Smoke Detector
with Interconnect and Timer
ELECTRICAL CHARACTERISTICS1,2 at TA = 25°C, VDD = 9.0 V, VSS = 0 V, COSCCAP = 0.1 μF,
RTIMINGRES = 8.2 MΩ (unless otherwise noted)
Characteristic
Symbol
Test Conditions
Test Pin
Min.
Typ.
Supply Voltage Range
Supply Current
Detector Input Current
Input Offset Voltage
Hysteresis
Common Mode Range
Active Guard Impedance
Oscillator Period
Oscillator Pulse Width
Timer Mode Duration
VDD Operating
IDD
VDD = 9.0 V, no alarm, no loads
VDD = 12 V, no alarm, no loads
IDETECTIN 0% to 40% RH, VIN = 0 to 9.0 V
VOS(GUARD1) Active GUARD1
VOS(GUARD2) Active GUARD2
VOS Detect comparator
VHYS No alarm to alarm
VCM(guard) Guard amplifier
VCM Smoke comparator
ZAG1 GUARD1 to VSS
ZAG2 GUARD2 to VSS
tosc
No alarm
tosc(alarm) Local or remote alarm
tw(osc)
ttimer
After TIMER START high-to-low,
no smoke
6
6
6
15
14, 15
16, 15
15, 13
13
14, 15
13, 15
14
16
12
12
12
4
6.0
—
—
—
—
—
—
90
2.0
0.5
—
—
1.34
37.50
8.0
8.0
9.0
5.0
—
—
—
—
—
130
—
—
10
500
1.67
41.67
10
10
Low-Battery Threshold
VDD(th)
TA = 0°C to 50°C,
LOW-V SET open circuit
6
7.2
—
Sensitivity Adjust Voltage
VSET
VSENSITIVITYSET / VDD,
SENSITIVITY SET open circuit
13
48.5
50
Horn Output Voltage
Horn Output On-Time
Horn Output Off-Time
TIMER START Logic Levels
TIMER START Input Current
TIMER OUT Pulldown Current
LED Output-On Current
LED Output On-Time
LED Output Off-Time
VOL
VOH
ton(horn)
tw(horn)
toff(horn)
thorn
VIH
VIL
IIN
IPD
ILED
tw(LED)
tLED1
tLED2
tLED3
IOUT = 16 mA, VDD = 9.0 V
IOUT = 16 mA, VDD = 7.2 V
IOUT = –16 mA, VDD = 9.0 V
IOUT = –16 mA, VDD = 7.2 V
Local or remote alarm
Low battery
Local or remote alarm
Low battery
VTIMERSTART = 9.0 V
VTIMEROUT = 0.5 V
VDD = 7.2 V, VLED = 1.0 V
No alarm, in standby
No alarm, timer mode
Local alarm or test alarm
10, 11
—
10, 11
—
10, 11
8.5
10, 11
6.3
10,11
120
10, 11
8
10, 11
60
10, 11
32
1
3.5
1
—
1
20
4
500
5
10
5
8.0
5
32
5
8.0
5
0.76
0.1
—
8.8
—
160
10
80
40
—
—
—
—
—
10
40
10
0.97
tLED4 Remote alarm, no local smoke
5
—
No LED
pulses
Max.
12
9.0
12
±1.0
±100
±100
±50
170
VDD – 0.5
VDD – 2.0
—
—
2.00
45.84
12
12
7.8
51.5
0.5
0.9
—
—
208
12
104
48
—
1.5
80
—
—
12
48
12
1.14
—
Units
V
μA
μA
pA
mV
mV
mV
mV
V
V
kΩ
kΩ
s
ms
ms
min
V
%VDD
V
V
V
V
ms
ms
ms
s
V
V
μA
μA
mA
ms
s
s
s
s
Continued on the next page…
Allegro MicroSystems, Inc.
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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