Advanced
Monolithic
Systems
AMS222
COMPLIMENTARY OUTPUT OSCILLATOR/CLOCK GENERATOR
RoHS compliant
FEATURES
APPLICATIONS
• Low-Cost, Oscillator/Clock Generator
• Simple User Programming
• Output frequency programmable from 10 kHz to 6MHz
• 2.7 to 15V Single-Supply Operation
• Output frequency tolerance <1%
• Complementary output signal
• Break before make output signal
• Switch-Mode Power Supplies
• Servers
• Printers
• Embedded Microcontrollers
• Industrial Controls
• Automotive Applications
• Toys
GENERAL DESCRIPTION
The AMS222 is a low-cost, oscillator intended to be used as an external clock for low-frequency applications. The device
consists of a resistor-programmed oscillator with complementary output stage. An external resistor allows for output frequency
range to be adjusted from 10kHz to 6MHz. The complimentary output stage is very useful in paralleling, switching regulators
for doubling the output current. AMS222 is offered in SOT-23 5-leads package.
ORDERING INFORMATION:
PIN CONNECTIONS
MAX.
PACKAGE TYPE
OPERATING
OFFSET
5 LEAD SOT-23
AMS222AM1
TEMP. RANGE
-40 to +125°C
15mV
5L SOT-23
(M1)
Top View
TYPICAL APPLICATION
AMS222 used to SYNC. AMS4155 to >400KHz
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS222
ABSOLUTE MAXIMUM RATINGS (Note 1)
Voltage Range on VCC
-0.5V to +16V
Operating Temperature Range
Storage Temperature Range
-40ºC to +125ºC
-55ºC to +125ºC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications
is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
Electrical Characteristics at TA = -40ºC to +125ºC and VCC = +3.0C to 5.5V unless otherwise noted.
PARAMETER
CONDITIONS
Min.
Supply Current
CL = 15pF, VCC = 3.3V, RSET = 12.5 KΩ
CL = 15pF, VCC = 5.5V, RSET = 12.5 KΩ
High-Level Output Voltage
(OUT)
IOH = -1.5mA
Low-Level Output Voltage
(OUT)
IOH = -1.5mA
VCC = 3.3V
AMS222
Typ.
Max.
1.0
1.0
1.2
1.5
Units
2.5V
mA
V
0.4
V
AC ELECTRICAL CHARACTERISTICS
Electrical Characteristics at TA = -40ºC to +125ºC and VCC = +3.0C to 5.5V unless otherwise noted.
PARAMETER
CONDITIONS
Min.
AMS222
Typ.
Units
Max.
VCC = 3.3V, TA = +25ºC
-1.0
+1.0
TA = +25ºC, RSET = 12.5 KΩ
VCC = 3.3V to 5.0 V (Note 2)
-0.25
+0.25
TA = +25ºc, RSET = 12.5 KΩ
VCC = 5.0V to 10V (Notes 2)
-0.5
+0.5
Temperature Frequency Variation
VCC = 3.3V (Note 3)
-2.0
+2.0
%
Load Capacitance
(Note 4)
30
pF
Output Duty Cycle
10kHz to 1MHz, TA = +25ºC (Note 3)
1MHz to 2 MHz (Note 4)
Output Rise/Fall Time
CL = 15pF, VCC = 3.3V
Output Frequency Tolerance
Voltage Frequency Variation
48
46
49.5
48
20
%
%
%
30
ns
Note 1: All voltage referenced to ground.
Note 2: This is the change observed in output frequency due to changes in voltage.
Note 3: Parameter is guaranteed by design and is not production tested.
Note 4: Output voltage swings can be impaired at high frequencies combined with high output loading.
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS222
TYPICAL CHARACTERISTICS
Channel 2 Rise and Channel 1 Fall Time @ VCC = 3.3V, C1 = 15pF
Channel 1 Rise and Channel 2 Fall Time @ VCC= 3.3V, C1= 15pF
Break before make Approximate 520mV @ VCC= 3.3V, C1= 15pF
Channel 1 and 2 Waveform @ 500 KHz, VCC= 3.3V, C1= 15pF
Channel 1 Duty Cycle @ VCC= 3.3V, C1= 15pF
Channel 2 Duty Cycle @ VCC= 3.3V, C1= 15pF
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS222
TYPICAL CHARACTERISTICS (continued)
Channel 1 and Channel 2 Waveform @ VCC = 5V, C1= 15pF
VCC = 5.0V, C1= 15pF
Channel 2 Fall Time
Channel 1 Rise Time
VCC= 5.0V, C1 = 15pF
Channel 1 Fall Time
Channel 2 Rise Time
Waveform @ 4MHz and VCC= 3.3V (vertical scale 500mV/div)
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS222
TYPICAL CHARACTERISTICS (continued)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
OUTPUT VOLTAGE HIGH vs. OUTPUT CURRENT
OUTPUT VOLTAGE LOW vs. OUTPUT CURRENT
0.4
2.9
1.70
CL=15pF, TA=+25ºC
VCC = 3.3V
VCC = 3.3V
2.8
0.3
1.20
2.7
0.2
0.95
2.6
0.1
1.45
12.5KW
0
2.5
0.70
2.0
4.0
6.0
8.0
10.0
12.0
2.5
2.0
SUPPLY VOLTAGE (V)
1.0
1.5
0.5
0
0
0.5
SUPPLY CURRENT vs. OUTPUT LOADING
SUPPLY CURRENT vs. TEMPERATURE
2.0
1.50
1.0
1.5
2.0
2.5
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
OUTPUT FREQUENCYvs. SUPPLY VOLTAGE
0.9
TA= +25ºC
TA= +25ºC, RSET = 40W
CL=15pF, VCC=3.3V
0.8
10V
1.30
1.5
12.5KW
0.7
5V
1.10
3.3V
1.25
0.6
2.7V
0.90
0.5
1.0
0.70
0.4
0.50
0.3
0
-40
-15
10
50
100
5
125
15
10
20
25
30
35
3.0
40
5.0
7.0
LOAD CAPACITANCE (pF)
TEMPERATURE (ºC)
OUTPUT FREQUENCYvs. TEMPERATURE
11.0
13.0
FREQUENCY ERROR
vs. SUPPLY VOLTAGE (FROM 3.3V)
DUTY CYCLE vs.TEMPERATURE
1.0
50.0
0.7
9.0
SUPPLY VOLTAGE (V)
TA= +25ºC
VCC = 3.3V
0.6
49.5
0.5
12.5KW
0.5
R= 12.5KW, VCC= 3.3V
0.4
49.0
0
48.5
-0.5
0.3
0.2
48.0
0.1
-40
-15
-10
50
TEMPERATURE (ºC)
100
125
-1.0
-40
-15
10
50
100
TEMPERATURE (ºC)
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
125
2
4
6
8
10
12
SUPPLY VOLTAGE (V)
Phone (925) 443-0722
Fax (925) 443-0723
AMS222
TYPICAL CHARACTERISTICS (continued)
FREQUENCY ERROR
vs. TEMPERATURE (FROM +25ºC)
OUTPUT FREQUENCY vs. R-FSET
1.0
VCC = 3.3V
6
0.5
5
12.5KW
4
0
3
2
-0.5
1
-1.0
-40
-15
50
-10
TEMPERATURE (ºC)
100
125
1
10
100
FSET Resistor
1000
PRODUCT DESCRIPTION
AMS222 is a silicon clock generator with complementary output, programmable frequency using a single resistor from 10KHz to
6MHz.
The Output B is 180º phase from Output A, and the signals do not overlap does allow to drive critical circuits where break-beforemake is very important. It operates from as low as 2.7V to high 15V consuming just 1.2mA of power. The output drive is capable
to drive capacitive loads up to 50pF and resistive loads up to 3mA. The high stability of the output frequency and it’s immunity to
supply variation is due to internal temperature compensated voltage reference. Having a good power supply rejection ratio, the
device works very well in electrically noisy environments. The only critical element is the Fset resistor that should be placed as
close as possible to the package to avoid parasitic capacitance and PCB traces cross-talk.
TYPICAL APPLICATION CIRCUIT
AMS222 used as Clock Signal to Synchronize two Switching Regulators
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS222
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)
0.014-0.020
(0.350-0.50)
0.037
(0.95)
TYP
0.018-0.024
(0.457-0.610)
10°
NOM
0.036-0.051
(0.090-1.30)
0.0035-0.0080
(0.090-0.20)
0.003
(0.150)
MAX
0.075
(1.90)
TYP
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
10°
NOM
0.018-0.024
(0.457-0.610)
(SOT-23-5 ) AMS DRW# 051001
Phone (925) 443-0722
Fax (925) 443-0723