ADVANCED
LINEAR
DEVICES, INC.
ALD2303A/ALD2303
DUAL PRECISION MICROPOWER CMOS VOLTAGE COMPARATOR WITH DRIVER
GENERAL DESCRIPTION
FEATURES
The ALD2303A/ALD2303 is a precision monolithic high performance
dual voltage comparator built with advanced silicon gate CMOS technology. It features very high typical input impedance of 10 12Ω; low
input bias current of 10pA; very low power dissipation of 7.5µA per
comparator; and single (+5V) or dual (± 5V) power supply operation.
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The input voltage range includes ground, making this comparator ideal
for single supply low level signal detection with high source impedance.
The ALD2303A/ALD2303 can be used in connection with other voltage
comparator circuits such as the ALD2301/ALD2302/ALD4302 voltage
comparators. The output can be connected to a higher external voltage
than V +.
The ALD2303A/ALD2303 is ideal for high precision micropower voltage
comparator applications, especially low level signal detection circuits
requiring low standby power, yet retaining high output current
capability.
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PIN CONFIGURATION
APPLICATIONS
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3V, 5V and 12V supply
Guaranteed to drive 200Ω loads
Fanout of 30LS TTL loads
Guaranteed maximum supply current of
20µA for each comparator
Pinout of LM193 type industry standard
comparators
Extremely low input bias currents -- 10pA
Virtually eliminates source impedance
effects
Single (+5V) and dual supply (±5V)
operation
CMOS, NMOS and TTL compatible
Open drain wired-OR outputs
High output sinking current -- 60mA
Low supply current spikes
High gain -- 100V/mV
Sensor detection circuits
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
• Extremely low power and high precision combination
• Built-in high input impedance buffer
• Built-in output driver with up to 60mA sink current
ORDERING INFORMATION ("L" suffix for lead free version)
-55°C to +125°C
8-Pin
CERDIP
Package
ALD2303ADA
ALD2303DA
Operating Temperature Range *
0°C to +70°C
0°C to +70°C
8-Pin
Small Outline
Package (SOIC)
ALD2303ASA
ALD2303ASAL
ALD2303SA
ALD2303SAL
8-Pin
Plastic Dip
Package
ALD23023PA
ALD2303APAL
ALD2303PA
ALD2303PAL
BLOCK DIAGRAM
(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
2303A
Parameter
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
2303
±1.5
3
±6
12
15
10
Max
Max
Unit
Conditions
±6
12
V
V
Dual Supply
Single Supply
40
µA
RLOAD = ∞
V/mV
RLOAD ≥15KΩ
5.0
mV
RLOAD =1.5KΩ
10
200
800
pA
10
200
1000
pA
0°C ≤ TA ≤ 70°C
V+ -1.5
V
0°C ≤ TA ≤ 70°C
0.4
V
I SINK =12mA
VINPUT =1V
Differential
mA
VOL =1.0V
nA
VOH = 5.0V
15
10
V+-1.5
Typ
±1.5
3
40
100
-0.3
Min
Test
100
-0.3
Low Level
Output
Voltage
VOL
Low Level
Output
Current
IOL
High Level
Leakage
Current
ILH
0.01
tRP
6.5
6.5
µs
5
5
µs
Response
Time 2
Notes:
1
2
0.18
24
0.4
60
0.18
24
20
60
0.01
20
RL =50KΩ
CL = 15pF
10mV Input
Step/10mV
Overdrive
RL = 50KΩ
CL = 15pF
TTL- Level Input
Step
Consists of junction leakage currents
Sample tested parameters
ALD2303A/ALD2303
Advanced Linear Devices
2
TYPICAL PERFORMANCE CHARACTERISTICS
SATURATION VOLTAGE
vs. TEMPERATURE
TRANSFER FUNCTION
VS = ± 2.5V
I SINK = 50mA
1.2
+6.0
OUTPUT VOLTAGE (V)
SATURATION VOLTAGE (V)
1.4
1.0
0.8
0.6
0.4
TA = 25°C
VS = ±6V
RL = 50K
0.0
0.2
-6.0
0
-25
0
25
50
75
100
125
COMMON - MODE VOLTAGE REFERRED
TO SUPPLY VOLTAGE
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
INPUT
VOLTAGE (mV)
DIFFERENTIAL INPUT VOLTAGE (mV)
VS = ± 2.5 V
V+
-0.5
≈
≈
0.5
V-
0
V+
100
VIN
+
-
≈
TA = 25°C
VS = ±2.5V
50K
VOUT
≈
0V
V-
+2.5
TTL
0.0
10mV
-2.5
-0.5
-55
-25
0
25
50
75
100
125
0
1
2
3
TEMPERATURE (°C)
INPUT
VOLTAGE (mV)
VS = ±2.5V
1.2
0.9
100
OUTPUT
VOLTAGE (V)
25°C
-25°C
-55°C
0.3
0.0
0
VIN
50K
+
-
≈
0V
VOUT
≈
V-
30
45
60
5mV
10mV
20mV
50mV
TTL
0.0
-2.5
75
0
1
2
3
4
5
6
7
TIM E (µs)
OUTPUT SINK CURRENT (mA)
ALD2303A/ALD2303
7
+2.5
85°C
15
6
TA = 25°C
VS = ±2.5V
V+
125°C
0
5
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
1.5
0.6
4
TIM E (µs)
SATURATION VOLTAGE vs.
SINK CURRENT
OUTPUT SATURATION
VOLTAGE (V)
+2.5
0.0
TEM PERATURE (°C)
0.5
-1.0
-2.5
OUTPUT
VOLTAGE (V)
COMMON - MODE VOLTAGE LIMITS (V)
-55
Advanced Linear Devices
3
TYPICAL PERFORMANCE CHARACTERISTICS
RESPONSE TIME FOR
REPRESENTATIVE SAMPLES
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
10
TA = 25°C
RL = ∞
+
100
RESPONSE TIME (µs)
SUPPLY CURRENT ( µA)
V+
10
tdLH
VS = ±2.5V
TA = 25°C
5
1
0
2.0
6.0
4.0
10.0
8.0
12.0
INPUT OFFSET VOLTAGE vs. SUPPLY
VOLTAGE REPRESENTATIVE SAMPLES
6
INPUT OFFSET VOLTAGE (mV)
+3
VCM = 0V
VS = ±2.5V
+2
+1
0
-1
-2
-3
TA = 25°C
4
2
0
-2
-4
-6
-55
-25
0
25
50
75
100
2
125
4
TEMPERATURE (°C)
RESPONSE TIME FOR
REPRESENTATIVE SAMPLES
8
SUPPLY VOLTAGE (V)
10
12
0.6
OUTPUT LOW VOLTAGE (V)
VS = ±2.5V
TA = 25°C
tdHL
5
TA = 25°C
IOL= 12mA
0.5
0.4
0.3
0.2
0.1
0.0
0
50
100
150
200
SAMPLES
ALD2303A/ALD2303
6
OUTPUT LOW VOLTAGE
vs. SUPPLY VOLTAGE
10
RESPONSE TIME (µs)
200
150
SAMPLES
NORMALIZED INPUT OFFSET VOLTAGE
vs. TEMPERATURE
NORMALIZED INPUT OFFSET
VOLTAGE (mV)
100
50
SUPPLY VOLTAGE (V)
Advanced Linear Devices
2
4
6
8
SUPPLY VOLTAGE (V)
10
12
4
TYPICAL APPLICATIONS
ZERO CROSSING DETECTOR
DOUBLE DUAL LIMIT WINDOW COMPARATOR
+3V
ALD2303
+12V
50K
+12V
+12V
VOUT
VIN
+
50K
VH2
+
-3V
1/2 ALD2303
VH1
+
+12V
VIN
+12V
47K
+
MULTIPLE RELAY DRIVE
+5V
VL1
+5V
VREF
+
+
VIN
VL2
50K
1/2 ALD2303
ALD2303
VL1 and VH1 first limit window send warning
VL2 and VH2 second limit window execute system cutoff
VOLTAGE LEVEL TRANSLATOR
V+ = +10V
50K
VREF
VOUT
VIN
+
1/2 ALD2303
VREF
= 1.4V for TTL input
VREF
=
V+
2
for CMOS input
Output VOUT swings from rail-to-rail
ALD2303A/ALD2303
Advanced Linear Devices
5
TYPICAL APPLICATIONS
PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER
+12V
+12V
P- Channel VP 02
Power MOSFET
+12V
R
10K
V1
+
2A Source
VIN
2A Sink
40K
+12V
V2
R ≥ 50 KΩ
R
+
N - Channel VN 01
Power MOSFET
10K
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.
ALD2303
TIME DELAY GENERATOR
V+
RF1
1/2 ALD2303
1/2 ALD2303
V1
V+
+
50KΩ
VREF
RT
VIN
1/2 ALD2303
RF2
V2
+
+
CT
RF3
1/2 ALD2303
V3
+
RF4
Design & Operating Notes:
1. In order to minimize stray oscillation, all unused inputs must be tied to ground.
2. 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. These 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.
3. 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.
ALD2303A/ALD2303
Advanced Linear Devices
6