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Advanced Monolithic Systems
FEATURES
AMS222
COMPLIMENTARY OUTPUT OSCILLATOR/CLOCK GENERATOR
RoHS compliant
APPLICATIONS
* Switch-Mode Power Supplies * Servers * Printers * Embedded Microcontrollers * Industrial Controls * Automotive Applications * Toys * 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
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:
MAX. PACKAGE TYPE 5 LEAD SOT-23 AMS222AM1 OPERATING TEMP. RANGE -40 to +125C
PIN CONNECTIONS
5L SOT-23 (M1)
OFFSET
15mV
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 -40C to +125C -55C to +125C
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 = -40C to +125C and VCC = +3.0C to 5.5V unless otherwise noted. PARAMETER CONDITIONS Min.
Supply Current High-Level Output Voltage (OUT) Low-Level Output Voltage (OUT) CL = 15pF, VCC = 3.3V, RSET = 12.5 K CL = 15pF, VCC = 5.5V, RSET = 12.5 K IOH = -1.5mA VCC = 3.3V IOH = -1.5mA 2.5V 0.4
AMS222 Typ.
1.0 1.0
Units Max.
1.2 1.5 mA V V
AC ELECTRICAL CHARACTERISTICS
Electrical Characteristics at TA = -40C to +125C and VCC = +3.0C to 5.5V unless otherwise noted. PARAMETER CONDITIONS Min.
Output Frequency Tolerance VCC = 3.3V, TA = +25C TA = +25C, RSET = 12.5 K VCC = 3.3V to 5.0 V (Note 2) Voltage Frequency Variation TA = +25c, RSET = 12.5 K VCC = 5.0V to 10V (Notes 2) Temperature Frequency Variation Load Capacitance Output Duty Cycle Output Rise/Fall Time VCC = 3.3V (Note 3) (Note 4) 10kHz to 1MHz, TA = +25C (Note 3) 1MHz to 2 MHz (Note 4) CL = 15pF, VCC = 3.3V 48 46 49.5 48 20 30 -1.0 -0.25 -0.5 -2.0
AMS222 Typ.
Units Max.
+1.0 +0.25 +0.5 +2.0 30 % %
% pF % 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 1 Fall Time Channel 2 Rise Time
VCC = 5.0V, C1= 15pF Channel 2 Fall Time Channel 1 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
1.70 CL=15pF, TA=+25C
OUTPUT VOLTAGE HIGH vs. OUTPUT CURRENT
2.9 VCC = 3.3V
OUTPUT VOLTAGE LOW vs. OUTPUT CURRENT
0.4 VCC = 3.3V
1.45 12.5KW 1.20
2.8
0.3
2.7
0.2
0.95
2.6
0.1
0.70 2.0 4.0 6.0 8.0 10.0 12.0 SUPPLY VOLTAGE (V)
2.5 2.5 2.0 1.5 1.0 0.5 0
0 0 0.5 1.0 1.5 2.0 2.5
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
SUPPLY CURRENT vs. TEMPERATURE
1.50 CL=15pF, VCC=3.3V 1.30 12.5KW 1.10 1.25 0.90 1.0 0.70 2.0
SUPPLY CURRENT vs. OUTPUT LOADING
TA= +25C, RSET = 40W
OUTPUT FREQUENCYvs. SUPPLY VOLTAGE
0.9 TA= +25C 0.8
10V 1.5 5V 3.3V 0.6 2.7V 0.5 0.7
0.4 0.3 5 10 15 20 25 30 35 40 3.0 5.0 7.0 9.0 11.0 13.0 LOAD CAPACITANCE (pF)
0.50 -40 -15 10 50 100 125 TEMPERATURE (C)
0
SUPPLY VOLTAGE (V)
OUTPUT FREQUENCYvs. TEMPERATURE
0.7 VCC = 3.3V 0.6 49.5 0.5 49.0 50.0
DUTY CYCLE vs.TEMPERATURE
1.0
FREQUENCY ERROR vs. SUPPLY VOLTAGE (FROM 3.3V)
TA= +25C
0.5 12.5KW R= 12.5KW, VCC= 3.3V 0
0.4
0.3 48.5 0.2 48.0 -40 -15 -10 50 100 125 -40 -15 10 50 100 125 -1.0 2 4 6 8 10 12 -0.5
0.1 TEMPERATURE (C)
TEMPERATURE (C)
SUPPLY VOLTAGE (V)
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS222
TYPICAL CHARACTERISTICS (continued)
FREQUENCY ERROR vs. TEMPERATURE (FROM +25C)
1.0 VCC = 3.3V 0.5 6 5 12.5KW 0 3 2 -0.5 1 -1.0 -40 -15 50 -10 TEMPERATURE (C) 100 125 1 10 100 FSET Resistor 1000 4
OUTPUT FREQUENCY vs. R-FSET
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 180 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)
0.037 (0.95) TYP 0.018-0.024 (0.457-0.610)
0.014-0.020 (0.350-0.50)
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 10 NOM 0.018-0.024 (0.457-0.610)
(SOT-23-5 ) AMS DRW# 051001
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723

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