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