BLOCK DIAGRAM
APPLICATIONS
MOSFET driver
High source impedance voltage
comparison circuits
Multiple limit window comparator
Power supply voltage monitor
Photo-detector sensor circuit
High speed LED driver
Oscillators
Battery operated instruments
Remote signal detection
Multiple relay drivers
FEATURES
Guaranteed to drive 200
loads
Fanout of 30 LS TTL loads
Low supply current of 150
A each comparator
Extremely low input bias currents -- 10pA
Virtually eliminates source impedance effects
Low operating supply voltage of 3V to 12V
Single +5V and dual supply
5V operation
High speed for both large and small signals -
120ns for TTL inputs and 400ns for 5mV overdrive
CMOS, NMOS and TTL compatible
Push-pull outputs
High output sinking current -- 60mA
Low supply current spikes
High gain -- 100V/mV
GENERAL DESCRIPTION
The ALD4302 is a monolithic high performance quad voltage comparator
built with advanced silicon gate CMOS technology. It features very high
typical input impedance of 10
12
; low input bias current of 10pA; fast
response time of 120ns; very low power dissipation of 150
A per compara-
tor; and single +5V or dual
5V power supply operation.
The input voltage range includes ground, making this comparator ideal for
single supply low level signal detection with high source impedance. The
outputs can source and sink current, allowing application flexibility, and can
be used in either wired-OR connection without pull up resistor or push-pull
configuration. The ALD4302 can be used in wired-OR connection with
other open drain circuits such as the ALD2301 and ALD2303 voltage
comparators.
The ALD4302 is ideal for a great variety of precision voltage comparator
applications, especially low level signal detection circuits requiring low
standby power, yet retaining high output current capability.
A
DVANCED
L
INEAR
D
EVICES,
I
NC.
QUAD PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER
ALD4302A/ALD4302
Operating Temperature Range*
-55
C to +125
C
0
C to 70
C
0
C to +70
C
14-Pin
14-Pin
14-Pin
CERDIP
Small Outline
Plastic Dip
Package
Package( SOIC)
Package
ALD4302A DB
ALD4302A SB
ALD4302A PB
ALD4302 DB
ALD4302 SB
ALD4302 PB
PIN CONFIGURATION
DB, PB, SB PACKAGE
+IN
1
-IN
2
+IN
2
03
04
GND
-IN
4
+IN
3
-IN
3
02
01
-IN
1
+IN
4
1
14
V
+
2
3
13
12
11
10
9
8
4
5
6
7
V
+
(3)
INVERTING INPUT
- IN
1
(4)
NONINVERTING INPUT
+ IN
1
(5)
NONINVERTING INPUT
+ IN
2
(7)
INVERTING INPUT
- IN
2
(6)
NONINVERTING INPUT
+ IN
3
(9)
INVERTING INPUT
- IN
3
(8)
INVERTING INPUT
- IN
4
(10)
(12)
NONINVERTING INPUT
+ IN
4
(11)
-
+
-
+
-
+
-
+
(2) OUT
1
(1) OUT
2
(14) OUT
3
(13) OUT
4
*
Contact factory for industrial temperature range
ORDERING INFORMATION
1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
ALD4302/ALD4302
Advanced Linear Devices
2
Notes:
1
Consists of junction leakage currents
2
Sample tested parameters
Voltage
V
S
1.5
6
1.5
6
V
Dual Supply
Supply
V
+
3
12
3
12
V
Single Supply
Supply
I
S
600
1000
600
1000
A
R
LOAD
=
Current
Voltage
A
VD
30
100
30
100
V/mV
R
LOAD
15K
Gain
Input Offset
V
OS
5
10
mV
R
LOAD
=1.5K
Voltage
Input Offset
I
OS
10
200
10
200
pA
0
C
T
A
70
C
Current
1
800
800
Input Bias
I
B
10
200
10
200
pA
0
C
T
A
70
C
Current
1
1000
1000
Common
Mode Input
V
ICR
-0.3
V
+-1.5
-0.3
V
+
-1.5
V
Voltage
Range
2
Low Level
I
SINK
=12mA
Output
V
OL
0.18
0.4
0.18
0.4
V
V
INPUT
=1V
Voltage
Differential
Low Level
Output
I
OL
24
60
24
60
mA
V
OL
=1.0V
Current
High Level
Output
V
OH
3.5
4.5
3.5
4.5
V
I
OH
= -2mA
Voltage
Response
R
L
= 5.1K
Time
2
t
RP
400
400
ns
C
L
= 15pF
100mV Input
Step/5mV
Overdrive
R
L
= 5.1K
120
120
ns
C
L
= 15pF
TTL- Level Input
Step
OPERATING ELECTRICAL CHARACTERISTICS
T
A
= 25
C V+= +5V unless otherwise specified
4302A
4302
Test
Parameter
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Conditions
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V
+
13.2V
Differential input voltage range
-0.3V to V
+
+0.3V
Power dissipation
600 mW
Operating temperature range
PB, SB package
0
C to +70
C
DB package
-55
C to +125
C
Storage temperature range
-65
C to +150
C
Lead temperature, 10 seconds
+260
C
ALD4302/ALD4302
Advanced Linear Devices
3
TYPICAL PERFORMANCE CHARACTERISTICS
SATURATION VOLTAGE vs.
SINK CURRENT
OUTPUT SINK CURRENT (mA)
0
15
30
45
60
75
1.5
1.2
0.9
0.6
0.3
0.0
OUTPUT SATURATION
VOLTAGE (V)
V
S
=
2.5V
-55
C
25
C
-25
C
85
C
125
C
TIM E (
s)
0.0
0.1
0.2
0.4
0.3
0.6
0.5
0.7
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
+2.5
0
100
0.0
-2.5
INPUT
VOLTAGE (mV)
OUTPUT
VOLTAGE (V)
TTL
5mV
10mV
20mV
50mV
T
A
= 25
C
V
S
=
2.5V
0V
V
IN
V+
V-
V
OUT
+
-
TRANSFER FUNCTION
DIFFERENTIAL INPUT VOLTAGE (mV)
+6.0
-6.0
0.0
OUTPUT VOLTAGE (V)
+2.5
0.0
-2.5
T
A
= 25
C
V
S
=
6V
R
L
= 5.1K
COMMON - MODE VOLTAGE REFERRED
TO SUPPLY VOLTAGE
TEMPERATURE (
C)
0.5
V+
-0.5
-1.0
0.5
V-
-0.5
COMMON - MODE LIMITS (V)
-55
-25
0
25
50
125
100
75
V
S
=
2.5V
SATURATION VOLTAGE
vs. TEMPERATURE
TEM PERATURE (
C)
-55
-25
0
25
50
125
100
75
1.4
1.2
1.0
0.8
0.6
0.4
0.2
SATURATION VOLTAGE (V)
0
V
S
=
2.5V
I
SINK
= 50mA
TIM E (
s)
0.0
0.1
0.2
0.4
0.3
0.6
0.5
0.7
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
+2.5
100
0
0.0
-2.5
INPUT
VOLTAGE (mV)
OUTPUT
VOLTAGE (V)
TTL
50mV
20mV
5mV
10mV
T
A
= 25
C
V
S
=
2.5V
0V
V
IN
V+
V-
V
OUT
+
-
ALD4302/ALD4302
Advanced Linear Devices
4
TYPICAL PERFORMANCE CHARACTERISTICS
600
500
400
300
700
0
25
50
75
-25
-55
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
100
800
900
1000
125
V
S
=
2.5V
No Load
All comparators
SUPPLY CURRENT vs. TEMPERATURE
6
8
10
12
4
2
SUPPLY VOLTAGE (V)
OUTPUT LOW VOLTAGE
vs. SUPPLY VOLTAGE
OUTPUT LOW VOLTAGE (V)
T
A
= 25
C
I
OL
= 12mA
0.0
0.2
0.4
0.5
0.6
0.1
0.3
800
600
400
200
1000
6.0
8.0
10.0
12.0
4.0
2.0
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
A)
T
A
= 25
C
R
L
=
-
+
V+
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
6
8
10
12
4
2
SUPPLY VOLTAGE (V)
OUTPUT HIGH VOLTAGE
vs. SUPPLY VOLTAGE
OUTPUT HIGH VOLTAGE FROM V
+
(V)
T
A
= 25
C
I
OH
= -2mA
V
+
-0.6
V
+
-0.1
V
+
-0.2
V
+
-0.3
V
+
-0.4
V
+
-0.5
V
+
NORMALIZED INPUT OFFSET VOLTAGE
vs. TEMPERATURE
TEMPERATURE (
C)
+3
+2
+1
0
-1
-2
-3
-55
-25
0
25
50
125
100
75
NORMALIZED INPUT OFFSET
VOLTAGE (mV)
V
CM
= 0V
V
S
=
2.5V
0
-2
-4
-6
2
6
8
10
12
4
2
SUPPLY VOLTAGE (V)
6
4
INPUT OFFSET VOLTAGE vs. SUPPLY
VOLTAGE REPRESENTATIVE SAMPLES
INPUT OFFSET VOLTAGE (mV)
T
A
= 25
C
ALD4302/ALD4302
Advanced Linear Devices
5
TYPICAL APPLICATIONS
DOUBLE DUAL LIMIT WINDOW COMPARATOR
ZERO CROSSING DETECTOR
+
+5V
-5V
1/4 ALD4302
V
OUT
V
IN
MULTIPLE RELAY DRIVE
+
+5V
+5V
1/4 ALD4302
V
REF
V
IN
VL
1
and VH
1
first limit window send warning.
VL
2
and VH
2
second limit window execute system cutoff.
+
+
+12V
+12V
+
+
+12V
+12V
50K
47K
50K
VH
2
VH
1
VL
1
VL
2
ALD4302
V
IN
VOLTAGE LEVEL TRANSLATOR
+
1/4 ALD4302
= 1.4V for TTL input
=
V
+
for CMOS input
2
V
OUT
V
REF
V
IN
V
REF
V
REF
Output V
OUT
swings from rail- to- rail
V+ = +10V
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