A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD2301A/ALD2301B
ALD2301C/ALD2301
DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH OPEN DRAIN DRIVER
GENERAL DESCRIPTION
The ALD2301A/ALD2301B/ALD2301C/ALD2301 is a monolithic high
performance dual 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 300ns;
very low power dissipation of 55µA per comparator; and single (+5V)
or dual (±5V) power supply operation.
The input voltage range includes ground, making this comparator
ideal for low level signal detection with high source impedance. The
outputs are open-drain configuration, allowing maximum application
flexibility, such as wired-OR connection. The outputs can be con-
nected to a higher external voltage than V
+
.
The ALD2301A/ALD2301B/ALD2301C/ALD2301 is ideal for a great
variety of voltage comparator applications, especially low level signal
detection circuits requiring low standby power, yet retaining high
output current capability as needed.
APPLICATIONS
•
•
•
•
•
•
•
•
High source impedance voltage comparison circuits
Dual limit window comparator
Power supply voltage monitor
Photo-detector sensor circuit
Relay or LED driver
Oscillators
Battery operated instruments
Remote signal detection
FEATURES
• Fanout of 30LS TTL loads
• Low supply current of 110µA typical
• Functional equivalent to LM193 industry
standard comparators
• Extremely low input bias currents
-- typically 10pA
• Virtually eliminates source impedance
effects
• Low operating supply voltage of 3V to 10V
• Single (+5V) and dual supply (±5V) operation
• High speed for both large signal and low
level signals -- 300ns typical for TTL inputs
• CMOS, NMOS and TTL compatible
• Wired-OR open drain outputs
• High output sinking current -- typically 60mA
• Low supply current spikes
PIN CONFIGURATION
OUT
1
-IN
1
+IN
1
GND
1
2
3
4
8
7
6
5
V
+
OUT
2
-IN
2
+IN
2
BENEFITS
• Low power and high precision combination
• Built-in high input impedance buffer
• Built-in output driver with up to 60mA sink current
SAL, PAL, DA PACKAGES
ORDERING INFORMATION
(“L” suffix for lead free version)
0°C to +70°C
Operating Temperature Range *
0°C to +70°C
-55°C to +125°C
8-Pin
Plastic Dip
Package
8-Pin
CERDIP
Package
BLOCK DIAGRAM
(8) V
+
INVERTING INPUT
-IN
1
(2)
NONINVERTING INPUT
+IN
1
(3)
V
+
(1) OUT
1
8-Pin
Small Outline
Package (SOIC)
ALD2301ASAL
ALD2301BSAL
ALD2301CSAL
ALD2301SAL
ALD2301APAL
ALD2301BPAL
ALD2301CPAL
ALD2301PAL
ALD2301ADA
ALD2301BDA
ALD2301CDA
ALD2301DA
INVERTING INPUT
-IN
2
(6)
NONINVERTING INPUT
+IN
2
(5)
(4) GND
(7) OUT
2
* Contact factory for leaded (non-RoHS) or high temperature versions.
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 SAL, PAL packages
DA 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
Parameter
Supply
Voltage
Supply
Current
Voltage Gain
Input Offset
Voltage
Input Offset
Current
1
Input Bias
Current
1
Common
Mode Input
Voltage
2
Range
Symbol Min
V
S
V+
IS
±1.5
3
110
2301A
Typ
Max
±5
10
180
Min
±1.5
3
110
2301B
Typ
Max
±5
10
180
Min
±1.5
3
110
2301C
Typ Max
±5
10
180
Min
±1.5
3
110
2301
Typ
Max
±5
10
180
Unit
V
V
µA
Test
Conditions
Dual Supply
Single Supply
R
LOAD
=
∞
A
VD
V
OS
50
150
2
50
150
5
50
150
20
50
150
10
V/mV R
LOAD
≥
15KΩ
mV
R
LOAD
≥
1.5KΩ
I
OS
10
200
10
200
10
400
10
200
pA
I
B
10
200
10
200
10
400
10
200
pA
V
ICR
-0.3
V
+
-1.5
-0.3
V
+
-1.5
-0.3
V
+
-1.5
-0.3
V
+
-1.5
V
Low Level
V
OL
Output Voltage
0.15
0.4
0.15
0.4
0.15
0.4
0.15
0.4
V
I
SINK
= 12mA
V
INPUT
= 1V
Differential
Low Level
Output
Current
High Level
Leakage
Current
Response
2
Time
I
OL
24
60
24
60
24
60
24
60
mA
V
OL
= 1.0 V
I
OH
.01
20
.01
20
.01
20
.01
20
nA
V
OH
= 5.0 V
t
RP
650
650
650
650
ns
R
L
= 5.1KΩ
C
L
= 15pF
100mV Input
Step/5mV
Overdrive
R
L
= 5.1KΩ
C
L
=15pF
TTL - Level
Input Step
300
300
300
300
ns
Notes :
1
2
Consists of junction leakage currents.
Sample tested parameters.
ALD2301A/ALD2301B/ALD2301C/ALD2301
Advanced Linear Devices
2 of 7
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
TA = 25°C
VS =
±6V
RL = 5.1K
0.0
-6.0
-2.5
0.0
DIFFERENTIAL INPUT VOLTAGE (mV)
+2.5
TEM PERATURE (°C)
COMMON - MODE VOLTAGE LIMITS (V)
COMMON - MODE VOLTAGE REFERRED
TO SUPPL VOLTAGE
Y
INPUT
VOLTAGE (mV)
0.5
V+
-0.5
-1.0
V
S
=
±
2.5V
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
0
100
V
IN
V+
T
A
= 25°C
V
S
=
±2.5V
5.1K
≈
+
-
0V
V-
V
OUT
≈
≈
0.5
V-
-0.5
-55
-25
0
25
50
75
100
≈
OUTPUT
VOLTAGE (V)
+2.5
0.0
-2.5
0.0
50mV
20mV
0.2
0.4
0.6
5mV
10mV
2mV
0.8
1.0
1.2
1.4
125
TEMPERATURE (°C)
TIM E (µs)
SATURATION VOL
TAGE vs.
SINK CURRENT
1.5
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
INPUT
VOLTAGE (mV)
T
A
= 25°C
V
S
=
±2.5V
5.1K
OUTPUT SATURATION
VOLTAGE (V)
V
S
=
±2.5V
1.2
0.9
125°C
0.6
0.3
0.0
0
15
30
45
60
OUTPUT SINK CURRENT (mA)
75
85°C
25°C
-25°C
-55°C
100
0
V
IN
V+
≈
+2.5
0.0
-2.5
0.0
+
-
0V
V-
V
OUT
2mV
5mV
10mV
20mV
50mV
≈
OUTPUT
VOLTAGE (V)
0.2
0.4
0.6
0.8
1.0
1.2
1.4
TIME (
µ
S
)
ALD2301A/ALD2301B/ALD2301C/ALD2301
Advanced Linear Devices
3 of 7
TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
V+
200
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT (
µA)
SUPPLY CURRENT (µA)
160
140
120
100
80
2.0
-
+
T
A
= 25°C
R
L
=
∞
180
160
140
120
100
80
60
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)
INPUT OFFSET VOLTAGE vs.
TEMPERATURE
3.0
OFFSET VOLTAGE (mV)
2.8
2.6
2.4
2.2
2.0
1.8
-55
-25
0
25
50
75
100
125
TEMPERATURE (°C)
V
CM
= 0V
V
S
=
±
2.5V
TYPICAL APPLICATIONS
DUAL LIMIT WINDOW COMPARATOR
V+
1/2 ALD2301
V
REF(HIGH)
V+
DUAL LIMIT PHOTO-DETECTOR
MONITOR
V
External
VOLTAGE COMPARATOR WITH
COMPLEMENTARY OUTPUTS
V+
BUZZER
1/2 ALD2301
+
-
R
LOAD
+
LED
Q
1/2 ALD2301
-
V
REF
V
LIMIT2
+
V
OUT
-
V
IN
V
REF(LOW)
+
LIGHT
V
LIMIT 1
V
IN
+
-
Q
1/2 ALD2301
-
1/2 ALD2301
PHOTO-
DETECTOR
+
-
1/2 ALD2301
MINIMUM 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 reaches VLIMIT2.
VEXTERNAL = +12V V+ = +5V.
ALD2301A/ALD2301B/ALD2301C/ALD2301
Advanced Linear Devices
4 of 7
SOIC-8 PACKAGE DRAWING
8 Pin Plastic SOIC Package
E
Dim
A
Millimeters
Min
1.35
0.10
0.35
0.18
4.69
3.50
Max
1.75
0.25
0.45
0.25
5.00
4.05
1.27 BSC
5.70
0.60
0°
0.25
6.30
0.937
8°
0.50
Min
0.053
0.004
0.014
0.007
0.185
0.140
Inches
Max
0.069
0.010
0.018
0.010
0.196
0.160
S (45°)
A
1
b
C
D-8
D
E
e
H
0.050 BSC
0.224
0.024
0°
0.010
0.248
0.037
8°
0.020
A
e
b
A
1
L
ø
S
S (45°)
H
C
L
ø
ALD2301A/ALD2301B/ALD2301C/ALD2301
Advanced Linear Devices
5 of 7
