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ADVANCED LINEAR DEVICES, INC.
ALD2301A/ALD2301B ALD2301/ALD2301C
DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH OPEN DRAIN DRIVER
GENERAL DESCRIPTION The ALD2301A/ALD2301B/ALD2301/ALD2301C 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; low input bias current of 10pA; fast response time of 300ns; very low power dissipation of 55A 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 connected to a higher external voltage than V +. The ALD2301A/ALD2301B/ALD2301/ALD2301C 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 PIN CONFIGURATION
OUT1
1 2 3 4 TOP VIEW DA, PA, SA PACKAGE
8 7 6 5
V+ OUT 2 -IN 2 +IN 2
FEATURES * Fanout of 30 LS TTL loads * Low supply current of 110A typical * Functional equivalent to LM193 industry standard comparators * Extremely low input bias currents -- 10pA typical * Virtually eliminates source impedance effects * Low operating supply voltage of 3V to 12V * 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 -- 60mA typical * Low supply current spikes ORDERING INFORMATION
Operating Temperature Range * -55C to +125C 0C to +70C 0C to +70C 8-Pin CERDIP Package 8-Pin Small Outline Package (SOIC) 8-Pin Plastic Dip Package
-IN 1 +IN 1 GND
BLOCK DIAGRAM
(8) V+ INVERTING INPUT -IN 1 (2) NONINVERTING INPUT +IN 1 (3) V+ INVERTING INPUT -IN 2 (6) NONINVERTING INPUT +IN 2 (5) (4) GND (7) OUT 2 (1) OUT 1
ALD 2301A DA ALD 2301B DA ALD 2301 DA ALD 2301C DA
ALD2301A SA ALD 2301B SA ALD 2301 SA ALD 2301C SA
ALD2301A PA ALD2301B PA ALD2301 PA ALD2301C PA
* Contact factory for industrial temperature range
(c) 1998 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 0C to +70C -55C to +125C -65C to +150C +260C
OPERATING ELECTRICAL CHARACTERISTICS TA = 25C V+ = +5V unless otherwise specified
Parameter Voltage Supply Supply Current Voltage Gain Input Offset Voltage Input Offset Current1 Input Bias Current1 Common Mode Input Voltage Range2 Symbol Min V+ 3 2301 Typ Max 12 Min 3 2301A Typ Max 12 Min 3 2301B Typ Max 12 Min 3 2301C Typ Max 12 Unit V RLOAD = Test Conditions
IS
110
180
110
180
110
180
110
180
A
AVD VOS
50
150 10
50
150 2
50
150 5
50
150 20
V/mV RLOAD 15K mV RLOAD 1.5K
IOS
10
200
10
200
10
200
10
400
pA
IB
10
200
10
200
10
200
10
400
pA
VICR
-0.3
V+ -1.5
-0.3
V + -1.5
-0.3
V + -1.5
-0.3
V + -1.5
V
Low Level VOL Output Voltage
0.15
0.4
0.15
0.4
0.15
0.4
0.15
0.4
V
ISINK = 12mA VINPUT = 1V Differential
Low Level Output Current High Level Leakage Current Response Time2
IOL
24
60
24
60
24
60
24
60
mA
VOL = 1.0 V
IOH
.01
20
.01
20
.01
20
.01
20
nA
VOH = 5.0 V
tRP
650
650
650
650
ns
RL = 5.1K CL = 15pF 100mV Input Step/5mV Overdrive RL = 5.1K CL =15pF TTL - Level Input Step
300
300
300
300
ns
Notes :
1 2
Consists of junction leakage currents. Sample tested parameters.
7-2
Advanced Linear Devices
ALD2301A/ALD2301B ALD2301/ALD2301C
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
VS = 2.5V ISINK = 50mA
+6.0
TA = 25C 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 0.5 V-0.5 -55 -25 0 25 50 75 100 125 VS = 2.5V
RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES
0 100
VIN V+
7
TA = 25C VS = 2.5V
5.1K
+ 0V V-
VOUT
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
TEMPERATURE (C)
TIM E (s)
SATURATION VOL TAGE vs. SINK CURRENT
1.5
RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES
INPUT VOLTAGE (mV)
TA = 25C VS = 2.5V
5.1K
OUTPUT SATURATION VOLTAGE (V)
VS = 2.5V 1.2 0.9 125C 0.6 0.3 0.0 0 15 30 45 60 OUTPUT SINK CURRENT (mA) 75 85C 25C -25C -55C
100 0
VIN
V+
+2.5 0.0 -2.5 0.0
+ 0V V-
VOUT
2mV 5mV 10mV 20mV 50mV
OUTPUT VOLTAGE (V)
0.2
0.4
0.6
0.8
1.0
1.2
1.4
TIME ( S)
ALD2301A/ALD2301B ALD2301/ALD2301C
Advanced Linear Devices
7-3
TYPICAL PERFORMANCE CHARACTERISTICS
TOTAL SUPPLY CURRENT vs. TOTAL SUPPLY VOLTAGE
V+
SUPPLY CURRENT ( A) SUPPLY CURRENT (A)
SUPPLY CURRENT vs. TEMPERATURE
200
160 140 120 100 80 2.0
+
TA = 25C RL =
180 160 140 120 100 80 60
VS = 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) VCM = 0V VS = 2.5V
TYPICAL APPLICATIONS
DUAL LIMIT WINDOW COMPARATOR
V+ 1/2 ALD2301 VREF(HIGH)
V+
DUAL LIMIT PHOTO-DETECTOR MONITOR
VExternal
VOLTAGE COMPARATOR WITH COMPLEMENTARY OUTPUTS
+ -
RLOAD
V+
BUZZER 1/2 ALD2301 LED
+ VREF
Q 1/2 ALD2301
VLIMIT2
+
VOUT
VIN VREF(LOW)
+
LIGHT VLIMIT 1
VIN
+ -
Q 1/2 ALD2301
1/2 ALD2301
+
PHOTODETECTOR
1/2 ALD2301
MINIMUM RLOAD = 1.5K OUTPUT HIGH FOR VIN < VREF(HIGH) AND VIN > VREF(LOW)
LED turns on as photo-detector voltage reaches V LIMIT1. Both LED and horn turns on as photo-detector voltage reaches VLIMIT2.
V EXTERNAL = +12V V+ = +5V.
7-4
Advanced Linear Devices
ALD2301A/ALD2301B ALD2301/ALD2301C

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