A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD4302A/ALD4302
QUAD PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER
GENERAL DESCRIPTION
The ALD4302A/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
Ω;
low input bias current of 10pA;
fast response time of 120ns; very low power dissipation of 150µA per
comparator; 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 ALD4302A/ALD4302 can be used in wired-OR
connections with other open drain circuits such as the ALD2301 and
ALD2303 voltage comparators.
The ALD4302A/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.
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
PIN CONFIGURATION
02
01
1
14
03
04
GND
+IN
4
-IN
4
+IN
3
-IN
3
2
13
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
Guaranteed to drive 200Ω loads
Fanout of 30LS TTL loads
Low supply current of 150µA each comparator
Extremely low input bias currents -- typically 10pA
Virtually eliminates source impedance effects
Low operating supply voltage of 4V to 10V
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 -- typically 60mA
Low supply current spikes
High gain -- 100V/mV
V
+
-IN
1
+IN
1
-IN
2
+IN
2
3
4
12
11
5
10
6
9
7
8
SBL, PBL, DB PACKAGES
BLOCK DIAGRAM
V
+
INVERTING INPUT
- IN
1
(4)
(3)
-
(2) OUT
1
ORDERING INFORMATION
(“L” suffix for lead free version)
Operating Temperature Range *
0°C to +70°C
0°C to +70°C
-55°C to +125°C
14-Pin
Small Outline
Package (SOIC)
14-Pin
Plastic Dip
Package
14-Pin
CERDIP
Package
NONINVERTING INPUT
+ IN
1
(5)
INVERTING INPUT
- IN
2
(6)
NONINVERTING INPUT
+ IN
2
(7)
INVERTING INPUT
- IN
3
(8)
NONINVERTING INPUT
+ IN
3
(9)
+
-
(1) OUT
2
+
-
(14) OUT
3
+
-
(13) OUT
4
ALD4302ASBL
ALD4302SBL
ALD4302APBL
ALD4302PBL
ALD4302ADB
ALD4302DB
INVERTING INPUT
- IN
4
(10)
NONINVERTING INPUT
+ IN
4
(11)
+
* Contact factory for leaded (non-RoHS) or high temperature versions.
(12)
Rev 2.0 ©2010 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286
www.aldinc.com
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V
+
Differential input voltage range
Power dissipation
Operating temperature range SBL, PBL packages
DB package
Storage temperature range
Lead temperature, 10 seconds
10.6V
-0.3V to
V
+
+0.3V
600 mW
0°C to +70°C
-55°C to +125°C
-65°C to +150°C
+260°C
OPERATING ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C V+= +5V unless otherwise specified
4302A
Parameter
Supply
Voltage
Supply
Current
Voltage
Gain
Input Offset
Voltage
Input Offset
Current
1
Input Bias
Current
1
Common
Mode Input
Voltage
Range
2
Low Level
Output
Voltage
Low Level
Output
Current
High Level
Output
Voltage
Response
Time
2
Symbol
V
S
V
+
I
S
Min
±2
4
600
Typ
Max
±5
10
1000
Min
±2
4
600
4302
Typ
Max
±5
10
1000
Unit
V
V
µA
Test
Conditions
Dual Supply
Single Supply
R
LOAD
=
∞
A
VD
30
100
30
100
V/mV
R
LOAD
≥15KΩ
V
OS
5
10
mV
R
LOAD
=1.5KΩ
I
OS
10
200
800
200
1000
10
200
800
200
1000
pA
I
B
10
10
pA
0°C
≤
T
A
≤
70°C
V
ICR
-0.3
V
+-1.5
-0.3
V
+ -1.5
V
0°C
≤
T
A
≤
70°C
V
OL
0.18
0.4
0.18
0.4
V
I
SINK
=12mA
V
INPUT
=1V
Differential
I
OL
24
60
24
60
mA
V
OL
=1.0V
V
OH
3.5
4.5
3.5
4.5
V
I
OH
= -2mA
t
RP
400
400
ns
R
L
= 5.1KΩ
C
L
= 15pF
100mV Input
Step/5mV
Overdrive
R
L
= 5.1KΩ
C
L
= 15pF
TTL- Level Input
Step
120
120
ns
Notes:
1
2
Consists of junction leakage currents
Sample tested parameters
ALD4302A/ALD4302
Advanced Linear Devices
2 of 9
TYPICAL PERFORMANCE CHARACTERISTICS
SATURATION VOL
TAGE
vs. TEMPERATURE
1.4
TRANSFER FUNCTION
SATURATION VOLTAGE (V)
1.0
0.8
0.6
0.4
0.2
0
-55
-25
0
25
50
75
100
125
OUTPUT VOLTAGE (V)
1.2
V
S
=
±
2.5V
I
SINK
= 50mA
+6.0
T
A
= 25°C
V
S
=
±6V
R
L
= 5.1K
0.0
-6.0
-2.5
0.0
DIFFERENTIAL INPUT VOLTAGE (mV)
+2.5
TEM PERATURE (°C)
COMMON - MODE VOLTAGE REFERRED
TO SUPPL VOLTAGE
Y
0.5
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
INPUT
VOLTAGE (mV)
0
100
V
IN
V+
V
OUT
COMMON - MODE LIMITS (V)
V+
-0.5
-1.0
V
S
=
±
2.5V
≈
+2.5
+
-
0V
V-
T
A
= 25°C
V
S
=
±2.5V
≈
5mV
10mV
OUTPUT
VOLTAGE (V)
≈
0.5
V-
-0.5
-55
-25
0
25
50
75
100
≈
TTL
50mV
0.0
20mV
-2.5
0.0
0.1
0.2
0.3
0.4
125
0.5
0.6
0.7
TEMPERATURE (°C)
TIM E (µs)
SATURATION VOL
TAGE vs.
SINK CURRENT
INPUT
VOLTAGE (mV)
1.5
V
S
=
±2.5V
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
100
0
T
A
= 25°C
V
S
=
±2.5V
V
IN
V+
OUTPUT SATURATION
VOLTAGE (V)
1.2
0.9
0.6
0.3
0.0
0
15
30
45
60
75
125°C
85°C
≈
+2.5
0V
+
-
V-
V
OUT
≈
5mV
10mV
20mV
50mV
OUTPUT
VOLTAGE (V)
25°C
-25°C
-55°C
TTL
0.0
-2.5
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
OUTPUT SINK CURRENT (mA)
TIM E (µs)
ALD4302A/ALD4302
Advanced Linear Devices
3 of 9
TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
1000
SUPPLY CURRENT vs. TEMPERATURE
V+
SUPPLY CURRENT (
µA)
SUPPLY CURRENT (µA)
1000
800
600
400
200
2.0
-
+
T
A
= 25°C
R
L
=
∞
900
800
700
600
500
400
300
V
S
=
±2.5V
No Load
All comparators
4.0
6.0
8.0
10.0
12.0
-55
-25
0
25
50
75
100
125
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
NORMALIZED INPUT OFFSET VOLTAGE
vs. TEMPERATURE
V
CM
= 0V
V
S
=
±2.5V
INPUT OFFSET VOLTAGE vs. SUPPLY
VOLTAGE REPRESENTATIVE SAMPLES
6
INPUT OFFSET VOLTAGE (mV)
+3
NORMALIZED INPUT OFFSET
VOLTAGE (mV)
+2
+1
0
-1
-2
-3
-55
-25
0
25
50
4
2
0
-2
-4
-6
T
A
= 25°C
75
100
125
2
4
TEMPERATURE (°C)
8
SUPPLY VOLTAGE (V)
6
10
12
OUTPUT HIGH VOLTAGE
vs. SUPPLY VOLTAGE
OUTPUT HIGH VOLTAGE FROM V
+
(V)
V
+
-0.6
OUTPUT LOW VOLTAGE
vs. SUPPLY VOLTAGE
0.6
OUTPUT LOW VOLTAGE (V)
V
+
-0.5
V
+
-0.4
V
+
-0.3
V
+
-0.2
V
+
-0.1
V
+
T
A
= 25°C
I
OH
= -2mA
0.5
0.4
0.3
0.2
0.1
0.0
T
A
= 25°C
I
OL
= 12mA
2
4
8
SUPPLY VOLTAGE (V)
6
10
12
2
4
6
8
SUPPLY VOLTAGE (V)
10
12
ALD4302A/ALD4302
Advanced Linear Devices
4 of 9
TYPICAL APPLICATIONS
ZERO CROSSING DETECTOR
DOUBLE DUAL LIMIT WINDOW COMPARATOR
+5V
+12V
+12V
+12V
VH
2
V
IN
V
OUT
+
-5V
1/4 ALD4302
50K
+
VH
1
+
+12V
47K
MULTIPLE RELAY DRIVE
V
IN
+
+5V
+5V
V
REF
V
IN
VL
1
+
VL
2
50K
+
1/4 ALD4302
ALD4302
VL1 and VH1 first limit window send warning.
VL2 and VH2 second limit window execute
system cutoff.
VOLTAGE LEVEL TRANSLATOR
V+ = +10V
V
REF
V
OUT
V
IN
+
1/4 ALD4302
V
REF
V
REF
= 1.4V for TTL input
=
V
+
2
for CMOS input
Output V
OUT
swings from rail- to- rail
ALD4302A/ALD4302
Advanced Linear Devices
5 of 9
嵌入式系统
