Diodes AP331A Single differential comparator Datasheet

AP331A
SINGLE DIFFERENTIAL COMPARATOR
General Description
Features
•
•
•
•
•
•
•
•
•
•
•
Wide supply
Voltage range: 2.0V to 36V
Single or dual supplies: ±1.0V to ±18V
Very low supply current drain (0.4mA) – independent of
supply voltage
Low input biasing current: 150nA
Low input offset current: ±70nA
Low input offset voltage: ±4mV
Input common-mode voltage range includes ground
Differential input voltage range equal to the power
supply voltage
Low output saturation voltage: 250mV at 4mA
Output voltage compatible with TTL, DTL, ECL, MOS
and CMOS logic systems
SOT25 and SOT25R: Available in “Green” Molding
Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
The AP331A is a precision voltage comparators with an offset
voltage specification as low as 8.0 mV max for comparator which
were designed specifically to operate from a single power supply
over a wide range of voltages. Operation from split power
supplies is also possible and the low power supply current drain
is independent of the magnitude of the power supply voltage. The
comparator also have a unique characteristic in that the input
common-mode voltage range includes ground, even though
operated from a single power supply voltage.
Application areas include limit comparators, simple analog to
digital converters; pulse, square wave and time delay generators;
wide range VCO; MOS clock timers; multivibrators and high
voltage digital logic gates. The AP331A is designed to directly
interface with TTL and CMOS. When operated from both plus
and minus power supplies, the AP331A will directly interface with
MOS logic where their low power drain is a distinct advantage
over standard comparators.
Applications
•
•
•
•
•
•
High precision comparators
Reduced VOS drift over temperature
Eliminates need for dual supplies
Allows sensing near ground
Compatible with all forms of logic
Power drain suitable for battery operation
Ordering Information
AP331A XX G - 7
Device
AP331AWG-7
AP331AWRG-7
Notes:
Package
Lead Free
Packing
W : SOT25
WR : SOT25R
G : Green
7 : Tape & Reel
Package
Code
Packaging
(Note 2)
W
WR
SOT25
SOT25R
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3000/Tape & Reel
-7
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP331A Rev. 2
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© Diodes Incorporated
AP331A
SINGLE DIFFERENTIAL COMPARATOR
Pin Assignments
(1) SOT25
(2) SOT25R
( Top View )
( Top View )
IN-
1
GND
2
IN+
3
5 Vcc
IN+
1
GND
2
IN-
3
4 Output
5 Vcc
4 Output
Pin Descriptions
Pin Name
IN-
Pin No.
SOT25R
SOT25
1
3
Description
Input-
GND
2
2
Ground
IN+
3
1
Input+
Output
4
4
Output
Vcc
5
5
Power Supply
Block Diagram
V+
3.5μA
Q2
+INPUT
100μA
3.5μA
100μA
Q3
Q1
Q4
OUTPUT
Q5
-INPUT
Q6
Q8
AP331A Rev. 2
Q7
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Absolute Maximum Ratings
Symbol
VCC
VIN
VIN
ICC
Parameter
Supply Voltage
Differential Input Voltage (Note 10)
Input Voltage
Input Current (VIN-0.3V) (Note 5)
Rating
40
40
-0.3 to +40
50
Unit
V
V
V
mA
740
mW
SOT25
SOT25R
PD
Power Dissipation (Note 3)
TJ
TST
Output Short-Circuit to Ground (Note 4)
Operating Junction Temperature Range
Storage Temperature Range
Continuous
+150
-65 to +150
o
o
C
C
Recommended Operating Conditions
Symbol
VCC
VCC
VIN
VIN
TA
Parameter
Supply Voltage (Single)
Supply Voltage (Dual Supplies, V+ VS GND)
Differential Input Voltage (Single) (Note 10)
Differential Input Voltage (Dual Supplies) (Note 10)
Operating Ambient Temperature
Min
+2
±1
0
-18
0
Max
+36
±18
±36
+18
70
Unit
V
V
V
V
o
C
Electrical Characteristics
(VCC = 5V, TA = 25oC, unless otherwise stated)
Symbol
Parameter
Conditions
(Note 11)
VOFFSET Input Offset Voltage
IIN(+) or IIN(-) with Output In
IBIAS
Input Bias Current
Linear Range, VCM = 0V
(Note 7)
IOFFSET
Input Offset Current
IIN(+) - IIN(-) VCM = 0V
Input Common Mode Voltage
V+ = 30V (Note 8)
Range
+
V = 5V
ICC
Supply Current
RL = ∞
V+ = 36V
RL > 15kΩ, V+ = 15V
Voltage Gain
VO = 1V to 11V
VIN = TTL Logic Swing,
VREF = 1.4V, VRL = 5V,
Large Signal Response Time
RL = 5.1kΩ
VRL = 5V, RL = 5.1kΩ
Response Time
(Note 9)
VIN(-) = 1V, VIN(+) = 0,
IO(Sink)
Output Sink Current
VO < 1.5V
VIN(-) = 1V, VIN(+) = 0,
VSAT
Saturation Voltage
ISINK < 4mA
VIN(-) = 0, VIN(+) = 1V,
IO(Leak)
Output Leakage Current
VO = 5V
AP331A Rev. 2
3 of 13
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Min
-
Typ.
4.0
Max
8.0
Unit
mV
-
150
400
nA
-
70
150
nA
+
0
-
V -1.5
V
-
0.4
1
1
2.5
mA
50
200
-
V/mV
-
300
-
ns
-
1.3
-
μs
6.0
16
-
mA
-
250
400
mV
-
0.1
-
nA
FEBRUARY 2009
© Diodes Incorporated
AP331A
SINGLE DIFFERENTIAL COMPARATOR
Electrical Characteristics
( VCC = 5V ) ( Note 6 )
Symbol
Parameter
VOFFSET Input Offset Voltage
IOFFSET
Input Offset Current
IBIAS
Input Bias Current
Input Common Mode Voltage
Range
VSAT
IO(Leak)
Saturation Voltage
Output Leakage Current
Differential Input Voltage
θJA
θJC
Notes:
Thermal Resistance
Junction-to-Ambient
Thermal Resistance
Junction-to-Case
Conditions
(Note 11)
IIN(+) -IIN(-), VCM = 0V
IIN(+) or IIN(-) with Output In
Linear Range, VCM = 0V
(Note 7)
V+ =30V (Note 8)
VIN(-) = 1V, VIN(+) = 0, ISINK <
4mA
VIN(-) = 0, VIN(+) = 1V,
VO = 30V
Keep All VIN’s > 0V (or V-, if
Used), (Note 10)
SOT25 (Note 12)
SOT25R (Note 12)
SOT25 (Note 12)
SOT25R (Note 12)
Min
-
Typ.
-
Max
9
200
Unit
mV
nA
-
-
500
nA
0
-
V+ -2.0
V
-
-
700
mV
-
-
1.0
μA
-
-
36
V
173
o
C/W
37
o
C/W
3. The maximum power dissipation is a function of TJ(MAX) , θJA. The maximum allowable power dissipation at any ambient temperature is
PD = (T J(MAX) -TA)/ θJA . All numbers apply for packages soldered directly onto a PC board.
4. Short circuits from the output to V+ can cause excessive heating and eventual destruction. When considering short circuits to
ground, the maximum output current is approximately 20mA independent of the magnitude of V+.
5. This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base
junction of the input PNP transistors becoming forward biased and thereby acting as input diode clamps. In addition to this
diode action, there is also lateral NPN parasitic transistor action on the IC chip. This transistor action can cause the output
voltages of the comparators to go to the V+ voltage level (or to ground for a large overdrive) for the time duration that an input
is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which is negative,
again returns to a value greater than -0.3V.
6. The AP331A temperature specifications are limited to 0°C < TOP < +70°C.
7. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent
of the state of the output so no loading change exists on the reference or input lines.
8. The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The
upper end of the common-mode voltage range is V+-1.5V at 25°C, but either or both inputs can go to 36V without damage,
independent of the magnitude of V+.
9. The response time specified is for a 100mV input step with 5mV overdrive. For larger overdrive signals 300ns can be
obtained, see typical performance characteristics section.
10. Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the
common-mode range, the comparator will provide a proper output state. The low input voltage state must not be less than
-0.3V (or 0.3V below the magnitude of the negative power supply, if used).
+
+
11. At output switch point, VO ~ 1.4V, RS=0Ω with V from 5V to 30V; and over the full input common-mode range (0V to V -1.5V),
at 25°C.
12. Test condition for SOT25 and sot25R: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
AP331A Rev. 2
4 of 13
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Application Information
The AP331A is high gain, wide bandwidth devices, like most comparators, can easily oscillate if the output lead is inadvertently
allowed to capacitively couple to the inputs via stray capacitance. This shows up only during the output voltage transition intervals as the
comparator change states. Power supply bypassing is not required to solve this problem. Standard PC board layout is helpful as it
reduces stray input-output coupling. Reducing the input resistors to < 10kΩ reduces the feedback signal levels and finally, adding even a
small amount (1.0 to 10 mV) of positive feedback (hysteresis) causes such a rapid transition that oscillations due to stray feedback are
not possible. Simply socketing the IC and attaching resistors to the pins will cause input-output oscillations during the small transition
intervals unless hysteresis is used. If the input signal is a pulse waveform, with relatively fast rise and fall times, hysteresis is not required.
All input pins of any unused comparators should be tied to the negative supply.
The bias network of the AP331A establishes a drain current independent of the magnitude of the power supply voltage over the
range of from 2.0 VDC to 30 VDC. It is usually unnecessary to use a bypass capacitor across the power supply line.
The differential input voltage may be larger than V+ without damaging the device (Note 10). Protection should be provided to
prevent the input voltages from going negative more than -0.3 VDC (at 25°C). An input clamp diode can be used as shown in the
applications section.
The output of the AP331A is the uncommitted collector of a grounded-emitter NPN output transistor. Many collectors can be tied
together to provide an output OR’ing function. An output pull-up resistor can be connected to any available power supply voltage within
the permitted supply voltage range and there is no restriction on this voltage due to the magnitude of the voltage applied to the
+
V terminal of the AP331A package. The output can also be used as a simple SPST switch to ground (when a pull-up resistor is not used).
+
The amount of current the output device can sink is limited by the drive available (which is independent of V ) and the β of this device.
When the maximum current limit is reached (approximately 16mA), the output transistor will come out of saturation and the output voltage
will rise very rapidly. The output saturation voltage is limited by the approximately 60Ω rSAT of the output transistor. The low offset voltage
of the output transistor (1.0 mV) allows the output to clamp essentially to ground level for small load currents.
Typical Circuit
( VCC = 5.0VDC )
+5.0VDC
V+
+VIN
+
3.0K
VO
+VREF
+
100K
1/4 MM54CXX
AP331A Rev. 2
5 of 13
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Typical Circuit
(Continued) (VCC = 5.0VDC)
V+
200K
2.0K
100K
V+
0
-
0.1µF
VO
AP331A
+
200K
CRYSTAL
f=100KHz
Crystal Controlled Oscillator
V+
V+
100K
100K
-
0.1µF
3.0K
5.1K
10
+VC
FREQUENCY
CONTROL
VOLTAGE
INPUT
500pF
0.01µF
+
3.0K
+
AP331A
OUTPUT1
AP331A
-
V+/2
20K
50K
20K
OUTPUT2
-
V+/2
AP331A
+
Two-Decade High Frequency VCO
V+
3K
-
+VREF
AP331A
+VIN
10K
VO
+
10M
Non-Inverting Comparator with
Hysteresis
AP331A Rev. 2
6 of 13
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Typical Circuit
(Continued) (VCC = 5.0VDC)
V+
V+
+0.075V
-
100K
AP331A
A
100K
V+
0
"0" "1"
AP331A
100K
f
A
+
B
100K
C
-
1K
1K
B
3K
200K
3K
39K
+0.375V
C
1K
100K
+
100K
1K
V+
0
"0" "1"
Or Gate
AND Gate
V+
10K
V+ (12VDC)
R4
3K
100K
+VREF HI
2RS
+
10K
AP331A
100K
AP331A
V+
0
"0" "1"
f
D1
A
VOUT
LAMP
12 ESB
-
+
RS
D2
+VIN
B
D3
+
C
D4
D
ALL DIODES 1N914
+VREF LOW
-
Limit Comparator
Large Fan-in AND Gate
AP331A Rev. 2
2N2222
AP331A
2RS
7 of 13
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Typical Circuit
(Continued)
(VCC = 5.0VDC)
V+
+
3.0K
VO
AP331A
-
+
AP331A
-
ORing the Outputs
V
+
V+
+
100K
100K
5.1K
5.1K 5.1K
-
VIN
0
t0
100pF
1M
10K
-
1N914
AP331A
VO
1N914
+
1M
AP331A
VO
+
20M
0.001µF
1ms
t0
1M
10K
Zero Crossing Detector
(Single Power Supply)
AP331A Rev. 2
V+
PW
t1
0
1N914
One-Shot Multivibrator
8 of 13
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Typical Circuit
(Continued)
(VCC = 5.0VDC)
AP331A Rev. 2
9 of 13
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Split-Supply Applications
(V+ = +15VDC and V- = -15 VDC)
V+
51K
51K
10K
2K
3.9K
-
2.4K
2.4K
φA
AP331A
+
AP331A
+
8.2K
AP331A
2K
-
φB
+
5.1K
AP331A
-
50pF
6.8K
V-
MOS Clock Driver
AP331A Rev. 2
10 of 13
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Typical Characteristics
Supply Current
Input Current
Response Time for Various Input
Overdrives—Negative Transition
Response Time for Various Input
Overdrives—Positive Transition
Output Saturation Voltage
AP331A Rev. 2
11 of 13
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AP331A
SINGLE DIFFERENTIAL COMPARATOR
Marking Information
(1) SOT25 and SOT25R
( Top View )
4
7
5
XX Y W X
1
2
Part Number
AP331A
AP331A
Package Information
3
XX : Identification code
Y : Year 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : A~Z : Green
Package
SOT25
SOT25R
Identification Code
R9
R3
(All Dimensions in mm)
(1) Package Type: SOT25 and SOT25R
AP331A Rev. 2
12 of 13
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© Diodes Incorporated
AP331A
SINGLE DIFFERENTIAL COMPARATOR
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
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Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
AP331A Rev. 2
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