TYPICAL APPLICATIONS
DUAL LIMIT WINDOW COMPARATOR
DUAL LIMIT PHOTO DETECTOR MONITOR
V
External
V+
1/2 ALD2321
V
REF(HIGH)
R
LOAD
V+
BUZZER
1/2 ALD2321
LED
+
-
V
LIMIT2
+
V
OUT
-
V
LIMIT 1
V
IN
V
REF(LOW)
+
-
1/2 ALD2321
LIGHT
PHOTO-
DETECTOR
+
-
1/2 ALD2321
R
LOAD
= 1.5KΩ
OUTPUT HIGH FOR V
IN
<V
REF(HIGH)
AND V
IN
> V
REF(LOW)
LED turns on as photo-detector
voltage reaches VLIMIT1.
Both LED and horn turns on as photo-
detector voltage reachesVLIMIT2.
VEXTERNAL= +12V, V+ = +5V
RESPONSE TIME MEASUREMENT CIRCUIT
Response time is defined as the internal between the application
of an input step function and the instant when the output reaches
50% of its maximum value as measured by the following test circuit:
+5V
5.1KΩ
10X INPUT STEP
9KΩ
V
IN
1KΩ
PINS OUT1, OUT1H, OUT2, OUT2H,
INTERNAL CIRCUIT CONFIGURATIONS
V+
V+
OUT
1
OUT
1H
OUT
1
OUT
OUT
2
OUT
2H
OUT
2
-
+
E-TRIM CIRCUIT
-IN
+IN
Level
Shift/
Scaling
Input
Offset
Trim
Circuit
-
+
OUT
H
OUT
VE
1x
*
VE
2x
*
Level
Shift/
Scaling
Input
Offset
Trim
Circuit
* These pins should be isolated by surrounding them with ground trace in user's applications.
ALD2321A/ALD2321B
ALD2321
Advanced Linear Devices
8
ALD [ ADVANCED LINEAR DEVICES ]
