CMC7106 CALIFORNIA MICRO DEVICES CMC7106 Low Power Operational Amplifier, RRIO, with Shutdown, SOT23-6 Features Tiny SOT23-6 package Guaranteed specs at 2.7V, 3V, and 5V Low supply current 0.3µA typ. operating. Less than 1µA idle. Rail-to-Rail Input and Output (RRIO) Simple shutdown mode (with logic level control) for power savings 1MHz gain-bandwidth Input common mode range includes V- and V+ Applications Test and Measurement Equipment Cellular Phones Portable Equipment Notebooks and PDAs Electronic Toys Product Description The California Micro Devices CMC7106 is a high performance CMOS operational amplifier in a 6-pin SOT23-6 package. Operating with low supply current, it is ideal for battery operated applications where power, space, and weight are critical considerations. Performance is similar to CAMDs CMC7101AY SOT Amp, with the addition of a shutdown pin to greatly reduce supply current when idle. The shutdown mode is controlled by an extra pin, and is compatible with most logic family signal levels. Ideal for use in test and measurement equipment and personal electronics such as cellular handsets, pagers, cordless telephones, and other products with limited space and battery power. CONNECTION DIAGRAM Pins 6 STANDARD PART ORDERING INFORMATION Orde ring Part N um be r Pa c k a g e Style Tape & R e e l SOT23-6 CMC7106Y/R Part Mark ing 7106 ©1999 California Micro Devices Corp. All rights reserved. 10/99 215 Topaz Street, Milpitas, California 95035 C0600999 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1 CMC7106 CALIFORNIA MICRO DEVICES OPERATING CONDITIONS (unless specified other wise) Param e te r R ating S u p p l y Vo l ta g e Ju n c ti o n Te mp e ra tu re R a n g e Thermal Resistance (qJA ) 2.7 < V+< 7 V -40 < TJ <+85 oC oC 325 ABSOLUTE MAXIMUM RATINGS Units /W (Note 1) Param e te r R ating Units E S D To l e ra n c e ( se e N o te 2 ) 2,000 V + Supply Voltage V (V+) + 0.3V, (V-) -0.3V V D i f f e re n ti a l I n p u t Vo l ta g e Vo l ta g e a t I n p u t / Ou tp u t P i n S u p p l y Vo l ta g e ( V + to V-) 7.5 V Cu r r e n t a t I n p u t P i n 5 mA C u r r e n t a t Ou t p u t P i n ( s e e N o t e 3 ) 35 mA Cu r r e n t a t P o we r S u p p l y P i n 35 mA 260 oC -65 to +150 oC 150 oC L e a d Te mp e ra tu re ( so l d e ri n g , 1 0 se c .) S to ra g e Te mp e ra tu re R a n g e ( T J ) Ju n c ti o n Te mp e ra tu re ( se e N o te 4 ) Note 1 Note 2 Note 3 Note 4 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating conditions indicate ratings 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 Operating Characteristics. Human body model, 1.5KΩ in series with 100pF. Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperatures can result in exceeding the maximum allowed junction temperature of 150°C. The maximum power dissipation is a function of TJ(MAX), θJA , and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/θJA. All numbers apply for packages soldered directly to a PC board. ©1999 California Micro Devices Corp. All rights reserved. 2 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 10/99 CMC7106 CALIFORNIA MICRO DEVICES 2.7V ELECTRICAL OPERATING CHARACTERISTICS U n l e ss o th e rwi se sp e c i f i e d , a l l l i mi ts g u a ra n te e d f o r T J =2 5 °C, V + =2 .7 V, V- = 0 V, R L > 1 MW Sym bol Param e te r VO S T CV O S I n p u t Of f se t Vo l ta g e I n p u t Of f se t Vo l ta g e Av e r a g e D r i f t I n p u t B i a s Cu r r e n t Input Offset Current I n p u t R e s i s ta n c e Common-Mode Rejection Ratio Input Common Mode Range Power Supply Rejection Ratio IB IO S RIN CMRR VC M PSRR CIN VO Common-Mode Input Capacitance Output Swing TY P 0.11 Conditions 0V < VC M < 2.7V V+ = 1.35V to 1.65V V- = -1.35V to -1.65V VC M = 0 LI M I T 6 RL = 2KW RL = 10KW mV 1 mV/o C 1 0.50 1 pA pA TW 70 55 dB 0 3.0 0 2.7 V V 60 50 dB pf 3 RL = 600W UN I T 2.60 0.10 2.60 0.10 2.68 0.02 2.15 0.50 2.64 0.06 V V V V V V 300 810 mA 1 mA IS Supply Current Amplfier "On", VS D = 2.7V IS Supply Current Amplfier "Off", VS D = 0V VS D I H VS D I L IIN Amplfier On Logic Level Amplfier "On" Amplfier Off Logic Level Amplfier "Off" 2.0 1.0 V V Logic Pin Current 1.0 mA SR GBW VS D = V+ or GND Slew Rate Gain Bandwidth Product 0.70 0.60 V/ms MHz ©1999 California Micro Devices Corp. All rights reserved. 10/99 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 3 CMC7106 CALIFORNIA MICRO DEVICES 3V ELECTRICAL OPERATING CHARACTERISTICS U n l e ss o th e rwi se sp e c i f i e d , a l l l i mi ts g u a ra n te e d f o r T J =2 5 °C, V + =3 V, V- = 0 V, R L > 1 MW Sym bol Param e te r VO S T CV O S I n p u t Of f se t Vo l ta g e I n p u t Of f se t Vo l ta g e Av e r a g e D r i f t I n p u t B i a s Cu r r e n t Input Offset Current I n p u t R e s i s ta n c e Common-Mode Rejection Ratio Input Common Mode Range Power Supply Rejection Ratio IB IO S RIN CMRR VC M PSRR CIN VO Common-Mode Input Capacitance Output Swing TY P 0.11 Conditions RL = 2KW RL = 10KW mV mV/o C 1 0.50 1 pA pA TW 55 dB -0.30 3.30 0 3.0 V V 80 68 dB pf 3 RL = 600W UN I T 1 0V < VC M < 3V For CMRR > 50dB V+ = 1.5V to 1.8V V- = -1.5V to -1.8V VC M = 0 LI M I T 4 2.90 0.10 2.90 0.10 2.99 0.01 2.60 0.40 2.60 0.40 2.70 0.30 V V V V V V 300 810 mA 1 mA IS Supply Current Amplfier "On", VS D = 3.0V IS Supply Current Amplfier "Off", VS D = 0V VS D I H VS D I L IIN Amplfier On Logic Level Amplfier Off Logic Level Amplfier "On" Amplfier "Off" 2.0 1.0 V V Logic Pin Current VS D = V+ or GND 1.0 mA SR GBW Slew Rate 0.70 Gain Bandwidth Product 0.60 V/ms MHz ©1999 California Micro Devices Corp. All rights reserved. 4 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 10/99 CMC7106 CALIFORNIA MICRO DEVICES 5V ELECTRICAL OPERATING CHARACTERISTICS U n l e ss o th e rwi se sp e c i f i e d , a l l l i mi ts g u a ra n te e d f o r T J =2 5 °C, V + =5 V, V- = 0 V, R L > 1 MW Sym bol Param e te r VO S T CV O S I n p u t Of f se t Vo l ta g e I n p u t Of f se t Vo l ta g e Av e r a g e D r i f t I n p u t B i a s Cu r r e n t Input Offset Current I n p u t R e s i s ta n c e Common-Mode Rejection Ratio Input Common Mode Range Power Supply Rejection Ratio IB IO S RIN CMRR VC M PSRR CIN Common-Mode Input Capacitance Output Swing VO TY P 0.11 Conditions 0V < VC M < 5V LI M I T 3 mV/o C 1 0.50 1 pA pA TW 55 -0.30 5.30 82 RL = 2KW RL = 10KW dB V V 70 dB pf 3 RL = 600W mV 1 82 For CMRR > 50dB V+ = 2.5V to 2.8V V- = -2.5V to -2.8V VC M = 0 UN I T 4.90 0.10 4.90 0.10 4.99 0.01 4.50 0.50 4.70 0.18 4.80 0.15 V V V V V V 100 16 mA IS C Output Short Circuit Current Sinking V0 = 5V (see Note 3) 80 11 mA IS Supply Current Amplfier "On", VS D = 5.0V 300 810 mA IS Supply Current Amplfier "Off", VS D = 0V 1 mA VS D I H VS D I L IIN Amplfier On Logic Level Amplfier Off Logic Level Amplfier "On" Amplfier "Off" 4.0 1.0 V V Logic Pin Current VS D = V+ or GND 1.0 mA Total Harmonic Distortion Slew Rate Gain Bandwidth Product f = 10kHz, Av = -2 RL = 10kW, Vo = 4.0pp tO N Turn On Time Av = +1, RL = 10KW 5 ms tO F F Turn Off Time Av = +1, RL = 10KW 2 ms T.H.D. SR GBW Sourcing V0 = 0V (see Note 3) 0.01 % 1 V/ms MHz 1 ©1999 California Micro Devices Corp. All rights reserved. 10/99 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 5 CMC7106 CALIFORNIA MICRO DEVICES TYPICAL PERFORMANCE CHARACTERISTICS CONNECTION DIAGRAMS ©1999 California Micro Devices Corp. All rights reserved. 6 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 10/99 CMC7106 CALIFORNIA MICRO DEVICES TYPICAL PERFORMANCE CHARACTERISTICS ©1999 California Micro Devices Corp. All rights reserved. 10/99 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 7 CMC7106 CALIFORNIA MICRO DEVICES TYPICAL PERFORMANCE CHARACTERISTICS ©1999 California Micro Devices Corp. All rights reserved. 8 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 10/99 CMC7106 CALIFORNIA MICRO DEVICES TYPICAL PERFORMANCE CHARACTERISTICS ©1999 California Micro Devices Corp. All rights reserved. 10/99 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 9 CMC7106 CALIFORNIA MICRO DEVICES Application Benefits The CMC7106 is very similar to the CAMD CMC7101AY, an improved version of the industry standard 7101 op amp. The CMC7106 has the additional benefit of reducing power consumption to almost nothing (<5microWatts @ 5V) when the amplifier is not being used. Packaging Most of the benefits of the CMC7106 are due to the use of a SOT package. The industry has readily adopted the SOT235 footprint, and this similar version has six pins. This leads to smaller finished products. PC CARDS (PCMCIA type III cards) require low profile components. At 0.056 inches (1.43 mm), the CMC7106 is ideal. Signal Integrity As products become smaller, the natural space used to isolate circuits is lost. Signals can interact or pick up noise in these designs. By using a physically smaller amplifier package, the CMC7106 can be placed closer to the signal source, reducing noise pickup and its small size makes it a simple buffer. Rail-to-Rail Input and Output allow the amplifier to operate from lower supplies and also maintain signal level swings under large signal amplitude conditions. Simplified Board Layout Board layout is helped in a couple of ways due to the small size. Op Amps can be placed where amps are needed, shortening signal paths and PCB traces subject to noise pick up. Compared to a dual or quad device, two or four strategically placed SOT Amps reduce crosstalk and avoid long traces. Lower Power Supply Current Drain The CAMD CMC7106 is similar to the CAMD CMC7101AY, which has lower power supply drain than other SOT Amps. The CMC7106 lower supply current means longer operation in battery operated products, and even further savings in a shutdown to idle mode. Higher Output Drive The CAMD CMC7106 has higher output current than other SOT Amps. It can be used as a driver in addition to use as a signal level amplifier. Rail-To-Rail Input Swing When the amplifier is used as a buffer, the input of the amplifier follows the input signal and if this is large compared to the available supply voltage, it is important that the Op Amp has a wide CMVR (Common Mode Voltage Range). RRIO Op Amps have a CMVR equal to (or greater than) the supplies and this allows large signal swings without clipping or distortion. Shutdown Operation Compared to a typical SOT Amp, an additional pin, Shutdown, is used to control the idle mode of the amplifier. It allows the amplifier to be placed in a very low power consumption mode, effectively reducing the current to less than 5 µW (at 5V supply). To use the shutdown pin, a logic level signal is connected to the shutdown pin, which is configured as a digital input (Logic 1 turns the amplifier on). This makes the input directly compatible with common logic family parts. If the shutdown feature is not desired, the pin should be shorted to V+ (pin 4). Turn On and Turn Off (Shutdown) Characteristics The turn off delay, tOFF, is defined as the time between the Shutdown signal crossing and the disable threshold (typically V+ - 1 volt) and the time for the amplifiers output to come within 10% of its final value. It is largely governed by a propagation delay within the CMC7106 of a few hundred nanoseconds followed by an exponential decay determined by the load resistance in parallel with the load capacitance. The turn on delay, tON, is defined as the time between the Shutdown signal crossing the threshold and the time the output reaches to within 10% of its final value. It exhibits a larger propagation delay through the amplifier which increases as V+ decreases (see the typical Performance Characteristics). The delay is followed by output slewing to the final value. The delay time for V+ equal to 5 volts is about 4 µS, and since the slew rate is 1V/µS, a five volt signal requires about 10 µS to reach its final value. With V+ equal to 3 volts, however, the propagation delay increases to 20 µS yielding a total turn-on time of 24 µS for a 3 volt signal. ©1999 California Micro Devices Corp. All rights reserved. 10 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 10/99 CMC7106 CALIFORNIA MICRO DEVICES Applications of the CMC7106 High Side Current Sense To monitor a load current, it is necessary to insert a current sense resistor into the power supply feed, as shown in Figure 1. The resulting voltage drop is proportional to the load current, but as both ends of this resistor are at (or very near to) the supply voltage, it is difficult to use a conventional Op Amp. mA while drawing only 300 µAs when enabled. It takes advantage of the CMC7106 op amp which provides a power down disable (shutdown) compatible with all 5 volt logic families and an ultra low current reference, the LT1389. When disabled, the circuit draws essentially zero current but when enabled exhibits load regulation of 0.05% from 0 to 100 mA, and line regulation of 0.01% from 4.5 V < Vdd < 5.5 V. The CMC7106 is ideal for this application as the inputs can operate at either supply rail (or at ground when used with a single supply). The output voltage is directly proportional to current in the load, scaled by the gain of the amplifier. To reduce the power loss in the sense resistor and also keep the supply voltage to the load immune to load current variations, a small value Rsense is used. An excellent application for this circuit is in a battery charger, where the charging current is monitored to detect end of charge (battery current will rise as the cells top off), and charging must be reduced to prevent damage (out gassing or over heating). The sense resistor can be placed in the negative side (known as Low Side Sensing), however this is less desirable due to disruption of the ground path. Figure 2. 5V to 3.3V Regulator with Disable Input Common Mode Range Considerations The CMC7106 is capable of accommodating input common mode and output voltages equal to both power supply rails. Nor will voltages that exceed the supply voltages cause phase inversion of the output. However, ESD diode clamps are provided at the inputs that can be damaged if static currents in excess of ± 5 mA are allowed to flow through them. This can occur when the magnitude of input voltage exceeds the rail by more than 0.3 volt. To preclude damage, a current limiting resistor, Rs, in series with the input is recommended as illustrated in Figure 1, whose value for Rs is given by: Rs Figure 1. High Side Current Sense Low Current 3.3V Regulator with Disable Over the past few years, power supply voltages in systems, particularly in PCs, have migrated from 5 volts to 3.3 volts while at the same time, saving power particularly in portable systems has become a major issue. On the other hand, there are legacy devices which still mandate the use of a 5 volt Vcc. Frequently in systems, a finite amount of current is needed for the 3.3 volt ICs. The circuit shown below provides a stable 3.3 voltage supply derived from the 5 volts at currents up to 100 > Vin - (V+ 0.3 V) 5 mA (1) For V+ (or V-) equal to 2.7 volts and Vin equal to 10 volts, Rs should be chosen for a value of 1.5 KΩ or greater. Shut-down Pin Current Limiting Considerations The Shut-down pin also provides ESD clamp diodes that will be damaged if the signal exceeds the rail by 0.3 volt either from a logic gate or other signal source. If possible, the current should be limited to less than ± 5 mA by inserting a resistor between the gate or source and the Shut-down Pin whose value is determined by Equation (1) above. ©1999 California Micro Devices Corp. All rights reserved. 10/99 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 11