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
DUAL PRECISION CMOS VOLTAGE COMPARATOR
WITH PUSH-PULL DRIVER
ALD2332A/ALD2332B/ALD2332
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
BENEFITS
• Simple precision reference voltage setting
• On-chip input pre-amplifier and output
buffers
• Precision voltage comparison without
pre-amplifier
• Eliminate need for second power supply
• Eliminate pull-up resistor
ADVANCED
LINEAR
DEVICES, INC.
GENERAL DESCRIPTION
The ALD2332A/ALD2332B/ALD2332 is a monolithic high performance
dual precision voltage comparator built with advanced silicon gate
EPAD® CMOS technology intended for high precision analog applica-
tions. The ALD2332A/ALD2332B/ALD2332 offers ultra-low input offset
voltages and currents at its input pre-amplifier, precision voltage com-
parator and high-current output driver integrated on-chip, in one industry
standard pinout 8 Lead PDIP or SOIC package. Primary features include:
very high typical input impedance of 1012Ω; low input bias current of
10pA; fast response time of 520ns with only 10mV input step signal; very
low power dissipation of 175µA per comparator; single (+5V) or dual
(±5V) power supply operation; and 50mA push-pull output drivers.
The input voltage range includes ground, which makes these compara-
tors ideal for single supply low level signal detection with high source
impedance. The outputs can source and sink current allowing for
application flexibility. They can be used in either wired-OR connection
without pull-up resistor or push-pull configuration. ALD2332A/ALD2332B/
ALD2332 can also be used in wired-OR connection with other open
drain circuits such as the ALD2331/ALD2303 voltage comparators.
The ALD2332A/ALD2332B/ALD2332 voltage comparators are ideal for
a great variety of precision analog voltage comparator applications,
especially in low level signal detection circuits which require low standby
power and high output current.
FEATURES
• Guaranteed to drive 200Ω loads
• Fanout of 30LS TTL loads
• Low supply current of 175µA each comparator
• Pinout of LM193 type industry standard voltage comparators
• 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 --
180ns for TTL inputs and 400ns for 20mV overdrive
• CMOS, NMOS and TTL compatible
• Push-pull outputs-current sourcing/ sinking
• High output sinking current -- typically 50mA
• Low supply current spikes
• High gain -- 100V/mV
PIN CONFIGURATION
BLOCK DIAGRAM
(1) OUT
1
(7) OUT
2
(4) GND
V
+
NONINVERTING INPUT
+IN
1
(3)
INVERTING INPUT
-IN
2
(6)
NONINVERTING INPUT
+IN
2
(5)
INVERTING INPUT
-IN
1
(2)
(8) V
+
1
2
3
4
8
7
6
5
OUT
1
-IN
1
+IN
1
GND
V
+
OUT
2
-IN
2
+IN
2
SAL, PAL PACKAGES
Operating Temperature Range *
0°C to +70°C 0°C to +70°C
8-Pin Small Outline 8-PinPlastic
Package (SOIC) Dip Package
ALD2332ASAL ALD2332APAL
ALD2332BSAL ALD2332BPAL
ALD2332SAL ALD2332PAL
ORDERING INFORMATION (“L” suffix for lead free version)
* Contact factory for leaded (non-RoHS) or high temperature versions.
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 2 of 11
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V+ +10.6V
Differential input voltage range -0.3V to V+ +0.3V
Power dissipation 600 mW
Operating temperature range PAL, SAL packages 0°C to +70°C
Storage temperature range -65°C to +150°C
Lead temperature, 10 seconds +260°C
OPERATING ELECTRICAL CHARACTERISTICS
TA = 25°C V+ = +5V unless otherwise specified
2332A 2332B 2332
Parameter Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions
Supply VS ±2±5±2±5±2±5 V Dual Supply
Voltage V+4 104 10 4 10
V Single Supply
Supply IS 350 500 350 500 350 500 µA No Load
Current Two Comparators
Voltage Gain AVD 50 150 50 150 50 150 V/mV RLOAD ≥ 15K
Input Offset Voltage VOS 0.02 0.5 0.5 1.0 1.0 2.0 mV RLOAD ≥ 1.5KΩ
Input Offset Current1IOS 0.01 20 0.01 20 0.01 20 pA
Input Bias Current1 IB 0.01 20 0.01 20 0.01 20 pA
Common Mode Input VICR -0.3 V+ -1.5 -0.3 V+ -1.5 -0.3 V+ -1.5 V
Voltage Range2
Low Level Sink VOL 0.15 0.4 0.15 0.4 0.15 0.4 V ISINK = 12mA
Output Voltage VINPUT = 1V Differential
Low Level Sink IOL 24 50 24 50 24 50 mA VOL = 1.0 V
Output Current SINK OUTPUT ON
High Level Source VOH 3.5 4.5 3.5 4.5 3.5 4.5 V ISOURCE = -2mA
Output Voltage SOURCE OUTPUT ON
Response Time2tRP 1.1 1.1 1.1 µs RL = 5.1KΩ, CL = 15pF
5mV Input Step/
0mV Overdrive
tRP 2.4 2.4 2.4 µs RL = 5.1KΩ ,CL =15pF
1mVInput Step/
0mV Overdrive
tRP 400 400 400 ns RL = 5.1KΩ, CL = 15pF
100mV Input Step/
20mV Overdrive
tRP 180 180 180 ns RL = 5.1KΩ ,CL =15pF
TTL-Level Input Step
Common Mode CMRR 80 80 80 dB VINPUT = 0V to 2.5V
Rejection Ratio
Power Supply PSRR 75 75 75 dB V+ = 4V to 5V
Rejection Ratio
Notes: 1 Consists of junction leakage currents
2 Sample test parameter
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 3 of 11
350
300
250
200
400
025
50 75
-25
-55 TEMPERATURE (°C)
SUPPLY CURRENT (µA)
100
450
500
550
125
V
S
= ±2.5V
No Load
All comparators
SUPPLY CURRENT vs. TEMPERATURE
TYPICAL PERFORMANCE CHARACTERISTICS
COMMON - MODE VOLTAGE REFERRED
TO SUPPLY VOLTAGE
TEMPERATURE (°C)
0.5
V+
-0.5
-1.0
0.5
V-
-0.5
COMMON - MODE VOLTAGE LIMITS (V)
-55 -25 0 25 50 12510075
≈≈
V
S
= ± 2.5 V
TRANSFER FUNCTION
DIFFERENTIAL INPUT VOLTAGE (mV)
+5.0
-5.0
0.0
OUTPUT VOLTAGE (V)
+2.5
0.0
-2.5
TA = 25°C
400
300
200
100
500
6.0 8.0 10.0 12.
0
4.02.0 SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
V+TA = 25°C
RL =
∞
-
+
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
NORMALIZED INPUT OFFSET VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
+3
+2
+1
0
-1
-2
-3
-55 -25 0 25 50 12510075
NORMALIZED INPUT OFFSET
VOLTAGE (mV)
VCM = 0V
VS = ±2.5V
6810 12
4
2
SUPPLY VOLTAGE (V)
OUTPUT HIGH VOLTAGE
vs. SUPPLY VOLTAGE
OUTPUT HIGH VOLTAGE FROM V
+
(V)
T
A
= 25°C
IOH
= -2mA
V
+
-0.6
V
+
-0.1
V
+
-0.2
V
+
-0.3
V
+
-0.4
V
+
-0.5
V
+
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 4 of 11
-55 -25 0 25 50 75 100 125
0
1
10
100
1000
V
+
= +5V
INPUT BIAS CURRENT vs. TEMPERATURE
AMBIENT TEMPERATURE (
0
C)
INPUT BIAS CURRENT (pA)
LOW LEVEL OUTPUT VOLTAGE 
vs. TEMPERATURE
0.5
0.4
0.3
0.2
0.1
0.0
LOW LEVEL OUTPUT VOLTAGE (V)
AMBIENT TEMPERATURE (°C)
-55 -25 025 50 125
100
75
V
+
= +3.5V
V
+
= +5V
V
+
= +10V
I
SINK = 12mA
V
INPUT =
1V 
Differential
SATURATION VOLTAGE vs. SINK CURRENT
OUTPUT SINK CURRENT (mA)
015 30 45 60 75
OUTPUT SATURATION VOLTAGE (V)
3.0
2.0
1.0
0.0
2.5
1.5
0.5
V+ = +5V TA = 125
0
C
TA = -55
0
C
TA = 85
0
C
TA = 25
0
C
TA = -25
0
C
HIGH LEVEL OUTPUT VOLTAGE vs.
TEMPERATURE
8.0
6.0
4.0
0.0
HIGH LEVEL OUTPUT VOTAGE (V)
AMBIENT TEMPERATURE (°C)
-55 -25 0 25 50 125
10075
2.0
10.0
V
+
= +10V
V
+
= +5V
V
+
= +4V
I
OH
= -2mA
INPUT OFFSET VOLTAGE vs. TEMPERATURE
0.4
0.0
-0.4
0.8
-0.8
-1.2
1.2
-2.0
INPUT OFFSET VOLTAGE (mV)
-55 -25 0 25 50 12510075
AMBIENT TEMPERATURE (°C)
-1.6
2.0
1.6 R
L
= 5.1KΩ
V
+
= +5V
V
+
= +2.5V
6810 12
4
2SUPPLY 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
TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 5 of 11
COMMON MODE REJECTION RATIO
vs. TEMPERATURE
COMMON MODE REJECTION MODE 
(dB)
-55 -25 025 50 12510075
85.0
80.0
75.0
70.0
90.0
65.0
60.0
AMBIENT TEMPERATURE (°C)
V
+
= +5V
R
L
= 5.1KΩ
0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
-1.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
RESPONSE TIME FOR VARIOUS INPUT 
 OVERDRIVES
OUTPUT VOLTAGE
(V)
TIME (µS)
50mV
20mV
10mV
5mV 2mV 1mV
V
+
= +5V
R
L
= 5.1KΩInput StepC
L
= 15pF
T
A
= 25
0
C
RESPONSE TIME FOR VARIOUS INPUT 
 OVERDRIVES
OUTPUT VOLTAGE
(V)
-1.0
6.0
2.0
0.0
1.0
3.0
4.0
5.0
0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0
TIME (µS)
T
A
= 25
0
C
V
+
= +5V
1mV
2mV
5mV
10mV
20mV
50mV
R
L
= 5.1KΩ
C
L
= 15pF
Input Step
POWER SUPPLY REJECTION RATIO 
vs.TEMPERATURE
AMBIENT TEMPERATURE (0C)
-55 -25 0 25 50 100 12575
90.0
85.0
70.0
POWER SUPPLY REJECTION RATIO 
(dB)
80.0
75.0
65.0
60.0
V+ = +5V
RL = 5.1KΩ
TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 6 of 11
TYPICAL APPLICATIONS
DOUBLE DUAL LIMIT WINDOW COMPARATOR
+
+
+10V
+10V
+
+
+10V
50K
1K
50K
VH
2
VH
1
VL
1
VL
2
V
IN
+10V
+10V
ZERO CROSSING DETECTOR
+
+3V
-5V
V
OUT
VIN
50K
+
+5V +5V
VREF
VIN
MULTIPLE RELAY DRIVE
+5
5V
RELAY
+
-
+5
VIN
VR
PRECISION SINGLE SUPPLY VOLTAGE
COMPARATOR WITH DIRECT RELAY DRIVER PRECISION SINGLE SUPPLY VOLTAGE
COMPARATOR WITH DIRECT RELAY DRIVER
+
-
5V
RELAY
-5
+5
VIN+ 1K
VIN-
VL1 and VH1 first limit window send warning
VL2 and VH2 second limit window execute
system cutoff
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 7 of 11
DOUBLE DUAL PRECISON PHOTO
DETECTOR MONITOR
VOLTAGE COMPARATOR WITH SINGLE
SUPPLY AND OUTPUT LEVEL SHIFT
+
-
+5V
VA= 0V to +10V
+10V
0
VOUT
VIN+
VIN-VOUT
-
-
+
+
Q
Q
V
IN
V
REF
V+
PRECISION VOLTAGE COMPARATOR WITH
COMPLEMENTARY PUSH-PULL OUTPUTS
V+
V
LIMIT2
PHOTO-
DETECTOR
LIGHT
-
-
+
+
LED
BUZZER
V
LIMIT 1
V
External
LED turns on as photo-detector voltage
reaches V
LIMIT
1. Both LED and horn turns on
as photo-detector voltage reaches V
LIMIT
2.
V
External
= +10V, V+ = +5V.
RESPONSE TIME MEASUREMENT CIRCUIT
Response time is defined as the interval 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:
+
-5.1KΩ
OUT
+5V
10X INPUT STEP
1KΩ
9KΩ
VIN
TYPICAL APPLICATIONS (cont'd)
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 8 of 11
This circuit eliminates crossover current in the
complementary power transistors. The outputs can
be used to source and sink different loads or tied
together to provide push-pull drive of the same load.
Design & Operating Notes:
1. As each output sources up to 10mA in the output high state, the output stage of a wired - OR low output circuit must be able to sink this current and still
provide desired output voltage levels. For TTL output levels, this consideration limits the number to a maximum of three ALD2302 outputs wired-OR
together.
2. In order to minimize stray oscillation, all unused inputs must be tied to ground.
3. The input bias and offset currents are essentially input protection diode reverse bias leakage currents, and are typically less than 1 pA at room
temperature. The currents are a function of ambient temperature, and would have to be considered in applications where very high source impedance
or high accuracy are involved.
4. The high output sinking current of 60mA for each output offers flexibility in many applications, as a separate buffer or driver would not be necessary to
drive the intended load. However, as the circuit normally operates close to ambient temperature due to its very low power consumption, thermal effects
caused by large output current transients must be considered in certain applications.
TYPICAL APPLICATIONS (cont'd)
TIME DELAY GENERATOR
+
RF4
V3
RF3
RF2
V+
RF1
+V2
+V1
RT
CT
+
VIN
V+
VREF
PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER
+
+
+10V
+10V
+10V
P- Channel VP 02
Power MOSFET
2A Source
2A Sink
N - Channel VN 01
Power MOSFET
+10V
10K
40K
10K
V
1
V
2
V
IN
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 9 of 11
PRECISION DUAL LIMIT WINDOW COMPARATAOR
+
+
-
-
OUTPUT HIGH FOR V
IN
<V
REF(HIGH)
R
LOAD
= 1.5KΩ
AND V
IN
> V
REF(LOW)
V
OUT
V+
V
REF(HIGH)
V
REF(LOW)
R
LOAD
V
IN
+
= 1.4V for TTL input
= V
+for CMOS input
2
VOUT
VREF
VIN
VREF
VREF
Output VOUT swings from rail-to-rail
V+ = +10V
VOLTAGE LEVEL TRANSLATOR
PRECISON VOLTAGE COMPARATOR WITH +/-5V
SUPPLY AND OUTPUT LEVEL SHIFT
PRECISION VOLTAGE COMPARATOR WITH OUTPUT LEVEL
SHIFT AND HIGH CURRENT LOAD DRIVER
+
- 15K
-5V
+5V
VOUT
15K
100K
100K
0.1µF
0.1µF
+5V
0
VOUT
+5V
+
-
-5V
+5V
R
2
=50 200Ω
+5V
R
1
= 15K
R
Load
V
OUT
V
IN+
V
IN-
0.066V
-4V
V
OUT
TYPICAL APPLICATIONS (cont'd)
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 10 of 11
8 Pin Plastic SOIC Package
Millimeters Inches
Min Max Min MaxDim
A
A1
b
C
D-8
E
e
H
L
S
1.75
0.25
0.45
0.25
5.00
4.05
6.30
0.937
8°
0.50
0.053
0.004
0.014
0.007
0.185
0.140
0.224
0.024
0°
0.010
0.069
0.010
0.018
0.010
0.196
0.160
0.248
0.037
8°
0.020
1.27 BSC 0.050 BSC
1.35
0.10
0.35
0.18
4.69
3.50
5.70
0.60
0°
0.25
ø
SOIC-8 PACKAGE DRAWING
L
C
H
S (45°)
ø
e
A
A
1
b
D
S (45°)
E
ALD2332A/ALD2332B/ALD2332 Advanced Linear Devices 11 of 11
8 Pin Plastic DIP Package
Millimeters Inches
Min Max Min MaxDim
A
A1
A2
b
b1
c
D-8
E
E1
e
e1
L
S-8
ø
3.81
0.38
1.27
0.89
0.38
0.20
9.40
5.59
7.62
2.29
7.37
2.79
1.02
0°
5.08
1.27
2.03
1.65
0.51
0.30
11.68
7.11
8.26
2.79
7.87
3.81
2.03
15°
0.105
0.015
0.050
0.035
0.015
0.008
0.370
0.220
0.300
0.090
0.290
0.110
0.040
0°
0.200
0.050
0.080
0.065
0.020
0.012
0.460
0.280
0.325
0.110
0.310
0.150
0.080
15°
PDIP-8 PACKAGE DRAWING
b
1
S
b
EE1
D
e
A2
A
1
A
L
ce
1
ø