http://www.BDTIC.com/AMS
Advanced AMS303
Monolithic MICROPOWER COMPARATOR, OPEN COLLECTOR OUTPUT
Systems
RoHS compliant
FEATURES APPLICATIONS
• Guaranteed 2.7V to 15V supplies • Mobile battery operated products
• Open Collector Output • Notebooks and PDA’s
• Industrial temperature range: -40ºC to +85ºC • Alarmed Circuits
• Low Offset Voltage <5mV • LED driver
• Low Supply Current: 7µA • Communication Circuits
GENERAL DESCRIPTION
The AMS303 has rail-to-rail output swing and input common-mode voltage. It exhibit excellent speed-power ratio, achieving
a Propagation Delay of 400ns with low supply current.
The AMS303 is available in space saving 5-Pin SOT23. The small package saves space on pc boards, and enables the design of
small portable electronic devices. It also allows the designer to place the device closer to the signal source to reduce noise
pickup and increase signal integrity.
ORDERING INFORMATION: PIN CONNECTIONS
MAX. PACKAGE TYPE OPERATING
OFFSET
5mV AMS303AM1
15mV AMS303M1
TYPICAL APPLICATION
V
V
ref
Advanced Monolithic Systems, Inc.
5 LEAD SOT-23
R
IN
R1
TEMP. RANGE
-40 to +85°C
-40 to +85°C
VCC
IN
R pull-up
-
Vo
+
R
F
5L SOT-23
(M1)
VCC -IN
15
GND32
VO +IN
Top View
4
AMS303
http://www.BDTIC.com/AMS
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage 2.7V to 16V Temperature Range (Note 5) -40ºC to +85ºC
Differential Input Voltage ±Supply Voltage Storage Temp. Range -65ºC to 150ºC
ESD Tolerance (Note 2) 2000V Junction Temperature (Note 5) 150ºC
Infrared or Convection (20 sec) 235ºC Thermal Resistance (Note 10) 265ºC
2.7V ELECTRICAL CHARACTERISTICS
Electrical Characteristics at TA = 25ºC, V+ = 2.7V, V- = 0V, VCM = VO = V+/2 unless otherwise noted.
PARAMETER
Input Offset Voltage
Input Offset Voltage Average Drift
Input Bias Current
Input Offset Current 5 15 nA
Av Voltage Gain 100 dB
Common Mode Rejection Ratio 0V ≤ VCM ≤ 2.7V 75 dB
Power Supply Rejection Ratio 2.7V ≤ V+ ≤ 10V 80 dB
Input Common-Mode Voltage
Range
Output Low Iload= 2mA 0.2 300 mV
Supply Current 7 10 µA
5.0V DC ELECTRICAL CHARACTERISTICS
Electrical Characteristics at TA = 25ºC, V+ = 5.0V, V- = 0V, VCM = VO = V+/2 unless otherwise noted.
PARAMETER
Input Offset Voltage
Input Offset Voltage Average Drift
Input Bias Current
Input Offset Current 5 15 nA
Av Voltage Gain 100 dB
Common Mode Rejection Ratio 0V ≤ VCM ≤ 5.0V 75 dB
Power Supply Rejection Ratio 5V ≤ V+ ≤ 10V 80 dB
Input Common-Mode Voltage
Range
Output Low Iload= 2mA 0.2 300 mV
Supply Current 7 10 µA
Advanced Monolithic Systems, Inc.
CONDITIONS
11 20 nA
For CMRR ≥ 55 dB 0 -0.2
CONDITIONS
11 20 nA
For CMRR ≥ 55 dB 0 -0.2
AMS303
Min. Typ. Max.
(Note 7) (Note 6) (Note 7)
0.5 5 mV
2 µV/ºC
2.7
2.75
AMS303
Min. Typ. Max.
(Note 7) (Note 6) (Note 7)
0.5 5 mV
2 µV/ºC
2.7
2.75
Units
V
V
Units
V
V
AMS303
http://www.BDTIC.com/AMS
15.0V DC ELECTRICAL CHARACTERISTICS
Electrical Characteristics at TA = 25ºC, V+ = 15.0V, V- = 0V, VCM = VO = V+/2 unless otherwise noted.
PARAMETER
CONDITIONS
AMS303
Min. Typ. Max.
(Note 7) (Note 6) (Note 7)
Input Offset Voltage
Input Offset Voltage Average Drift
Input Bias Current
0.5 5 mV
2 µV/ºC
11 20 nA
Input Offset Current 5 15 nA
Av Voltage Gain 100 dB
Common Mode Rejection Ratio 0V ≤ VCM ≤ 5.0V 75 dB
Power Supply Rejection Ratio 5V ≤ V+ ≤ 10V 80 dB
Input Common-Mode Voltage
Range
For CMRR ≥ 55 dB 0 -0.2
2.7
2.75
Output Low Iload= 2mA 0.2 300 mV
Supply Current 7 10 µA
AC ELECTRICAL CHARACTERISTICS
Unless otherwise specified, all limits guaranteed for TJ = 25 °C, V+ = 5V, V- = 0V, VCM = VO = V+/2. Boldface limits apply at
the temperature extreme.
PARAMETER
Rise Time
Fall Time
Propagation Delay
(High to Low) (Note 11)
Propagation Delay
(Low to High) (Note 11)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test
conditions, see the Electrical Characteristics.
Note 2: Human body model, 1.5 kΩ in series with 100 pF.
Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can
result in exceeding the maximum allowed junction temperature of 150 °C. Output currents in excess of ±30 mA may adversely affect
reliability.
Note 4: The maximum power dissipation is a function of T
temperature is.
Note 5: P
D
= (T
J(max)
- TA)/ θ
Note 6: Typical values represent the most likely parametric norm.
Note 7: All limits are guaranteed by testing or statistical analysis.
Note 8: Limiting input pin current is only necessary for input voltages which exceed the absolute maximum input voltage rating.
Note 9: Do not short circuit the output to V+ when V+ is greater than 12V or reliability will be adversely affected.
Note 10: C
includes the probe and test jig capacitance.
L
Note 11: Input offset voltage average drift is calculated by dividing the accelerated operating life V
This represents worst case input conditions and includes the first 30 days of drift.
CONDITIONS
f = 10kHz, C
Overdrive = 100 mV, 5Ω Pullup
f = 10 kHz, C
Overdrive = 100mV, 5Ω Pullup
f = 10 kHz, C
5 kΩ Pullup (Note 9) 100 mV overdrive
f = 10 kHz, C
5 kΩ Pullup (Note 9) 100 mV overdrive
All numbers apply for packages soldered directly into a PC board.
JA.
= 50 pF, ( Note 9)
L
= 50 pF, (Note 9)
L
= 50 pF, 10 mV overdrive
L
= 50 pF, 10 mV overdrive
L
J(max), θJA,
and T
The maximum allowable power dissipation at any ambient
A.
AMS303
Min. Typ. Max.
30 ns
OS
25
400
320
420
drift by the equivalent operational time.
ns
Units
V
V
Units
ns
ns
ns
Advanced Monolithic Systems, Inc.
http://www.BDTIC.com/AMS
TYPICAL PERFORMANCE CHARACTERISTICS
5mV input falling prop delay 5mV input rising prop delay
AMS303
10mV input falling prop delay 20mV input falling prop delay
50mV input falling prop delay
Advanced Monolithic Systems, Inc.
AMS303
http://www.BDTIC.com/AMS
TYPICAL PERFORMANCE CHARACTERISTICS
100mV input falling prop delay 100mV input rising prop delay
Fall time 100mV overdrive 1K 10pF load Rise time 100mV overdrive 1K 10pF load
Advanced Monolithic Systems, Inc.
http://www.BDTIC.com/AMS
APPLICATION INFORMATION
AMS303 is an open collector with a very low supply
current of typical 7uA. The advantage of this product is
the small space package and simplicity of application. It
operates from as low as +2.7V to +15Vand the output
pull-up resistor could be biased from higher or lower
voltage then Vcc. When a large input signal is applied,
an input resistor should be used to limit the input current
in case of excessive input voltage. If the input voltage is
pulled above the supply voltage Vcc, a set of clamp
diode should be used to protect the input circuit. Since
AMS303 is a high impedance input, PCB layout
precautions should be taken to avoid noise pick-up from
adjacent circuits or electrically noisy environments. A
good practice is to keep the input traces very short and
input components very close to the package. If long
conductors are necessary, shielded or twisted pairs
should be used.
AMS303
VCC
R
V
IN
IN
-
R1
+
R2
R
F
R pull-up
Vo
Advanced Monolithic Systems, Inc.
http://www.BDTIC.com/AMS
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
5 LEAD SOT-23 PLASTIC PACKAGE (M1
0.110-0.120
(2.794-3.048)
0.102-0.118
(2.60-3.00)
0.059-0.070
(1.50-1.75)
AMS303
0.014-0.020
(0.350-0.50)
10°
NOM
10°
NOM
0.018-0.024
(0.457-0.610)
0.0035-0.0080
(0.090-0.20)
(SOT-23-5 ) AMS DRW# 051001
0.018-0.024
(0.457-0.610)
0.036-0.051
(0.090-1.30)
0.003
(0.150)
MAX
0.037
(0.95)
TYP
0.075
(1.90)
TYP
Advanced Monolithic Systems, Inc.
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