ADVANCED
LINEAR
DEVICES, INC.
ALD2302A/ALD2302
DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER
GENERAL DESCRIPTION
FEATURES
The ALD2302A/ALD2302 are monolithic precision high performance
dual voltage comparators built with advanced silicon gate CMOS technology. The primary features are: very high typical input impedance of
1012Ω; low input bias current of 10pA; fast response time of 180ns; very
low power dissipation of 175µA per comparator; and single (+5V) or dual
(±5V) power supply operation.
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The input voltage range includes ground, which makes these comparators 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. The ALD2302A/
ALD2302 can also be used in wired-OR connection with other open
drain circuits such as the ALD2301/ALD2303 voltage comparators.
The ALD2302A/ALD2302 voltage comparators are ideal for a great
variety of applications, especially in low level signal detection circuits
which require low standby power and high output current. For quad
packages, use the ALD4302 quad voltage comparator.
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Guaranteed to drive 200Ω loads
Fanout of 30LS TTL loads
Low supply current of 175µA each comparator
Pinout of LM193 type industry standard
comparators
Extremely low input bias currents -- 10pA
Virtually eliminates source impedance effects
Low operating supply voltage of 4V to 12V
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 -- 60mA
Low supply current spikes
PIN CONFIGURATION
APPLICATIONS
• PCMCIA instruments
• MOSFET driver
• High source impedance voltage
comparison circuits
• Multiple limit window comparator
• Power supply voltage monitor
• Photodetector sensor circuit
• High speed LED driver
• Oscillators
• Battery operated instruments
• Remote signal detection
• Multiple relay drivers
OUT 1
1
8
V+
-IN 1
2
7
OUT 2
+IN 1
3
6
-IN 2
GND
4
5
+IN 2
TOP VIEW
DA, PA, SA PACKAGE
BENEFITS
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On-chip input and output buffers
Precision voltage comparison capability
Eliminate need for second power supply
Eliminate pull-up resistor
BLOCK DIAGRAM
ORDERING INFORMATION ("L" suffix for lead free version)
-55°C to +125°C
8-Pin
CERDIP
Package
ALD2302ADA
ALD2302DA
Operating Temperature Range *
0°C to +70°C
0°C to +70°C
8-Pin
Small Outline
Package (SOIC)
ALD2302ASA
ALD2302ASAL
ALD2302SA
ALD2302SAL
8-Pin
Plastic Dip
Package
ALD2302APA
ALD2302APAL
ALD2302PA
ALD2302PAL
(8) V+
INVERTING INPUT
-IN 1 (2)
(1) OUT 1
NONINVERTING INPUT
+IN 1 (3)
V+
INVERTING INPUT
-IN 2 (6)
(7) OUT 2
NONINVERTING INPUT
+IN 2 (5)
(4) GND
* Contact factory for industrial temperature range
©2007 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V+
Differential input voltage range
Power dissipation
Operating temperature range PA, SA package
DA package
Storage temperature range
Lead temperature, 10 seconds
13.2V
-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
TA = 25°C V+ = +5V unless otherwise specified
2302A
Symbol
Voltage
Supply
VS
V+
Supply
Current
IS
Voltage
Gain
AVD
Input Offset
Voltage
VOS
1.0
2.0
3.0
Input Offset
Current 1
IOS
10
200
800
Input Bias
Current 1
IB
10
200
1000
Common
Mode Input
Voltage
Range 2
VICR
Min
Typ
2302
Parameter
±2
4
350
10
Max
Min
±6
12
±2
4
500
100
Test
Max
Unit
Conditions
±6
12
V
V
Dual Supply
Single Supply
500
µA
RLOAD = ∞
V/mV
RLOAD ≥15KΩ
5.0
mV
RLOAD =1.5KΩ
0°C ≤ TA ≤ 70°C
10
200
800
pA
10
200
1000
pA
0°C ≤ TA ≤ 70°C
V
0°C ≤ TA ≤ 70°C
V
I SINK =12mA
VINPUT =1V
Differential
mA
VOL =1.0V
I OH = -2mA
350
10
V+ -1.5
-0.3
Typ
100
V+ -1.5
-0.3
Low Level
Output
Voltage
VOL
Low Level
Output
Current
IOL
24
60
24
60
High Level
Output
Voltage
VOH
3.5
4.5
3.5
4.5
V
400
400
ns
180
180
ns
Response
Time 2
Notes:
1
2
tRP
0.18
0.4
0.18
0.4
CL =15pF
100mV Input
Step/20mV
Overdrive
CL = 15pF
TTL- Level Input
Step
Consists of junction leakage currents
Sample tested parameters
ALD2302A/ALD2302
Advanced Linear Devices
2
TYPICAL PERFORMANCE CHARACTERISTICS
TRANSFER FUNCTION
SATURATION VOLTAGE
vs. TEMPERATURE
+6.0
VS = ± 2.5V
I SINK = 50mA
1.2
OUTPUT VOLTAGE (V)
SATURATION VOLTAGE (V)
1.4
1.0
0.8
0.6
0.4
0.2
TA = 25°C
VS = ±6V
0.0
-6.0
0
-55
-25
0
25
50
75
100
-2.5
125
COMMON - MODE VOLTAGE REFERRED
TO SUPPLY VOLTAGE
INPUT
VOLTAGE (mV)
0.5
VS = ± 2.5 V
-0.5
-1.0
≈
≈
0.5
V-0.5
-55
-25
0
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
25
50
75
100
OUTPUT
VOLTAGE (V)
COMMON - MODE VOLTAGE LIMITS (V)
TEM PERATURE (°C)
V+
0
VIN
V+
+
-
100
0V
≈
+2.5
20mV
0.0
50mV
10mV
-2.5
125
0.0
0.1
0.2
INPUT
VOLTAGE (mV)
0.9
100
0.6
0.7
0
VIN
25°C
-25°C
-55°C
0.3
0.0
60
V+
+
-
≈
0V
+2.5
85°C
VOUT
≈
V-
10mV
20mV
50mV
TTL
0.0
-2.5
75
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
TIM E (µs)
OUTPUT SINK CURRENT (mA)
ALD2302A/ALD2302
0.5
TA = 25°C
VS = ±2.5V
125°C
OUTPUT
VOLTAGE (V)
OUTPUT SATURATION
VOLTAGE (V)
1.2
45
0.4
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
VS = ±2.5V
30
0.3
TIM E (µs)
1.5
15
≈
TTL
SATURATION VOLTAGE vs.
SINK CURRENT
0
TA = 25°C
VS = ±2.5V
VOUT
V-
TEMPERATURE (°C)
0.6
+2.5
0.0
DIFFERENTIAL INPUT VOLTAGE (mV)
Advanced Linear Devices
3
TYPICAL PERFORMANCE CHARACTERISTICS
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
550
500
VS = ±2.5V
No Load
All comparators
500
TA = 25°C
RL = ∞
+
SUPPLY CURRENT (µA)
SUPPLY CURRENT ( µA)
V+
400
300
200
100
450
400
350
300
250
200
2.0
6.0
4.0
12.0
10.0
8.0
-55
0
-25
SUPPLY VOLTAGE (V)
100
75
125
6
INPUT OFFSET VOLTAGE (mV)
+3
NORMALIZED INPUT OFFSET
VOLTAGE (mV)
50
INPUT OFFSET VOLTAGE vs. SUPPLY
VOLTAGE REPRESENTATIVE SAMPLES
NORMALIZED INPUT OFFSET VOLTAGE
vs. TEMPERATURE
VCM = 0V
VS = ±2.5V
+2
+1
0
-1
-2
4
TA = 25°C
2
0
-2
-4
-6
-3
-55
-25
0
25
50
75
100
2
125
4
TEMPERATURE (°C)
OUTPUT HIGH VOLTAGE
vs. SUPPLY VOLTAGE
6
8
SUPPLY VOLTAGE (V)
10
12
OUTPUT LOW VOLTAGE
vs. SUPPLY VOLTAGE
V+ -0.6
0.6
OUTPUT LOW VOLTAGE (V)
OUTPUT HIGH VOLTAGE FROM V+ (V)
25
TEMPERATURE (°C)
TA = 25°C
IOH = -2mA
V+ -0.5
V+ -0.4
V+ -0.3
V+ -0.2
V+ -0.1
TA = 25°C
IOL= 12mA
0.5
0.4
0.3
0.2
0.1
0.0
V+
2
ALD2302A/ALD2302
4
6
8
SUPPLY VOLTAGE (V)
10
12
Advanced Linear Devices
2
4
6
8
SUPPLY VOLTAGE (V)
10
12
4
TYPICAL APPLICATIONS
DOUBLE DUAL LIMIT WINDOW COMPARATOR
ZERO CROSSING DETECTOR
+3V
ALD2302
50K
+12V
+12V
VOUT
VIN
+
50K
-5V
+12V
VH2
+
1/2 ALD2302
VH1
+
+12V
MULTIPLE RELAY DRIVE
+5V
47K
VIN
+12V
+5V
+
VL1
VREF
VIN
+
+
1/2 ALD2302
VL2
50K
ALD2302
VL1 and VH1 first limit window send warning
VL2 and VH2 second limit window execute
system cutoff
VOLTAGE LEVEL TRANSLATOR
V+ = +10V
VREF
VOUT
VIN
+
1/2 ALD2302
VREF
= 1.4V for TTL input
VREF
=
V+
2
for CMOS input
Output VOUT swings from rail-to-rail
ALD2302A/ALD2302
Advanced Linear Devices
5
TYPICAL APPLICATIONS
PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER
+12V
+12V
P- Channel VP 02
Power MOSFET
+12V
10K
+
V1
2A Source
VIN
2A Sink
40K
+12V
+
V2
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.
N - Channel VN 01
Power MOSFET
10K
ALD2302
TIME DELAY GENERATOR
V+
RF1
1/2 ALD 2302
1/2 ALD 2302
V1
V+
VREF
VIN
+
RT
1/2 ALD 2302
RF2
V2
+
+
CT
RF3
1/2 ALD 2302
V3
+
RF4
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.
ALD2302A/ALD2302
Advanced Linear Devices
6