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| CALIFORNIA MICRO DEVICES CMV1020 MICROPOWER RRO Operational Amplifier Features * Tiny SOT23-5 Package * Guaranteed specs at 1.8V, 2.2V, 2.7V, 3V and 5V * Very Low Supply current typically 85A@ 3V * Rail-to-Rail Output * Typical Total Harmonic Distortion of 0.02% at 3V * 1.66MHz Typical Gain Bandwidth Product * 1V/S Typical Slew Rate Applications * Mobile Communications * Cellular Phones * Portable Equipment * Notebooks and PDAs Product Description The CMV1020 is a high performance CMOS operational amplifier available in a small SOT23-5 package. Operating with very low supply current, it is ideal for battery operated applications where power, space and weight are critical. With 1.66MHz Gain Bandwidth Product, 1V/S Slew Rate, and a typical current consumption of only 85A, the CMV1020 provides excellent powerperformance ratio for power sensitive applications. Ideal for use in personal electronics such as cellular handsets, pagers, cordless telephones and other products with limited space and battery power. PIN DIAGRAM 5-Pin SOT23-5 1 NON-INV INPUT 2 V3 INV INPUT + 5 V+ - 4 OUTPUT S TA N D A R D PA R T O R D E R I N G I N F O R M AT I O N Package Pins 5 Style SOT23-5 Tape & Reel CMV1020Y/R Ordering Part Number Part Marking 1020 (c) 2000 California Micro Devices Corp. All rights reserved. 5/00 C0930500 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1 CALIFORNIA MICRO DEVICES CMV1020 A B S O L U T E M A X I M U M R AT I N G S ( N O T E 1 ) Parameter ESD Protection (HBM, Note 2) Differential Input Voltage Voltage at input/output Pin Temperature: Storage Operating Junction (Note 4) Lead (Soldering, 10s) Supply Voltage (V+ to V-) Current at Input Pin Current at Output Pin (Note 3) Current at Power Supply Pins Rating 2000 +/- Supply Voltage (V+) +0.3, (V-) -0.3 -65 to 150 125 260 7.5 5 15 15 Unit V V V C V mA mA mA O P E R AT I N G C O N D I T I O N S ( u n l e s s s p e c i f i e d o t h e r w i s e ) Parameter Supply Voltage Junction Temperature Thermal Resistance Rating 1.8 to 7 -40 to 85 325 Unit V C C / W Note 1: 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. Note 2: Human Body Model, 1.5K in series with 100pF. Note 3: Applies to both single-supply and split-supply operation. Continuous short ckt operation at elevated ambient temperatures can result in exceeding the maximum allowed junction temperature of 150C. Note 4: The maximum power dissipation is a function of TJ (MAX), JA and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ (MAX) - TA)/JA . All numbers apply for packages soldered directly to a PC board. (c)2000 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 5/00 CALIFORNIA MICRO DEVICES CMV1020 1 . 8 V E L E C T R I C A L O P E R AT I N G C H A R A C T E R I S T I C S ( U n l e s s o t h e r w i s e s p e c i f i e d T j = 2 5 C , V + = 1 . 8 V, V- = 0 V, R L > 1 M ) Symbol VO S IB IO S RIN IS GBW AV SR PSRR Parameter Input Offset Voltage Input Bias Current Input Offset Current Input Resistance Supply Current Gain Bandwidth Product Large Signal Voltage Gain Slew Rate Power Supply Rejection Ratio Conditions VO U T = 0.9V Typ 1 0.5 1 75 135 80 0.8 70 60 0 1.1 0.026 5 20 150 Limit 9 Unit mV pA pA T A MHz dB V/s dB dB V % mA mV 150 60 0.2 50 40 CMRR VC M THD IS C VO Common Mode Rejection Ratio Common Mode Input Range Total Harmonic Distortion Output Short Circuit Current Output Swing from either rail VO U T = 0.2V to 1.6V AV = -1, RL = 100K V+ = 0.9V tp 1.2V V- = -0.9V to -1.2V VCM = 0V 0V < VCM < 0.8V AV = -1, f = 1KHz, VO U T = 1Vp-p RL = 100K Source/Sink RL = 10K 2 . 2 V E L E C T R I C A L O P E R AT I N G C H A R A C T E R I S T I C S ( U n l e s s o t h e r w i s e s p e c i f i e d T j = 2 5 C , V + = 2 . 2 V, V- = 0 V, R L > 1 M ) Symbol VO S IB IO S RIN IS GBW AV SR PSRR Parameter Input Offset Voltage Input Bias Current Input Offset Current Input Resistance Supply Current Gain Bandwidth Product Large Signal Voltage Gain Slew Rate Power Supply Rejection Ratio Conditions VO U T = 1.1V Typ 1 0.5 1 80 1.5 80 0.9 70 60 0 1.5 0.02 7 20 150 Limit 9 Unit mV pA pA T A MHz dB V/s dB dB V % mA mV 160 60 0.2 50 40 CMRR VC M THD IS C VO Common Mode Rejection Ratio Common Mode Input Range Total Harmonic Distortion Output Short Circuit Current Output Swing from either rail VO U T = 0.2V to 2V AV = -1, RL = 100K V+ = 1.1V tp 1.4V V- = -1.1V to -1.4V VCM = 0V 0V < VCM < 1.2V AV = -1, f = 1KHz, VO U T = 1.4Vpp Source/Sink RL = 10K (c) 2000 California Micro Devices Corp. All rights reserved. 5/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 3 CALIFORNIA MICRO DEVICES CMV1020 2 . 7 V E L E C T R I C A L O P E R AT I N G C H A R A C T E R I S T I C S ( U n l e s s o t h e r w i s e s p e c i f i e d T j = 2 5 C , V + = 2 . 7 V, V- = 0 V, R L > 1 M ) Symbol VO S IB IO S RIN IS GBW AV SR PSRR Parameter Input Offset Voltage Input Bias Current Input Offset Current Input Resistance Supply Current Gain Bandwidth Product Large Signal Voltage Gain Slew Rate Power Supply Rejection Ratio VO U T = 0.2V to 2.5V AV = -1, RL = 100K V+ = 1.35V to 1.65V V- = -1.35V to 1.65V VCM = 0V 0V < VCM < 1.7V Conditions VO U T = 1.35V Typ 1 0.5 1 85 1.6 85 1 70 60 0 2 AV = -1, f = 1KHz, VO U T = 1.9Vp-p RL = 100K Source/Sink RL = 10K 0.02 12 20 150 65 0.25 50 45 170 Limit 6 Unit mV pA pA T A MHz dB V/s dB dB V % mA mV CMRR VC M THD IS C VO Common Mode Rejection Ratio Common Mode Input Range Total Harmonic Distortion Output Short Circuit Current Output Swing from either rail 3 V E L E C T R I C A L O P E R AT I N G C H A R A C T E R I S T I C S ( U n l e s s o t h e r w i s e s p e c i f i e d T j = 2 5 C , V + = 3 V, V- = 0 V, R L > 1 M ) Symbol VO S IB IO S RIN IS GBW AV SR PSRR Parameter Input Offset Voltage Input Bias Current Input Offset Current Input Resistance Supply Current Gain Bandwidth Product Large Signal Voltage Gain Slew Rate Power Supply Rejection Ratio VO U T = 0.2V to 2.8V AV = -1, RL = 100K V+ = 1.5V to 1.8V V- = -1.5V to -1.8V VCM = 0V 0V < VCM < 2V Conditions VO U T = 1.5V Typ 1 0.5 1 85 1.66 85 1.0 80 70 0 2.3 AV = -1, f = 1KHz, VO U T = 2Vp-p RL = 100K Source/Sink RL = 10K 0.02 15 20 150 65 0.25 55 50 170 Limit 5 Unit mV pA pA T A MHz dB V/s dB dB V % mA mV CMRR VC M THD IS C VO Common Mode Rejection Ratio Common Mode Input Range Total Harmonic Distortion Output Short Circuit Current Output Swing from either rail (c)2000 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 5/00 CALIFORNIA MICRO DEVICES CMV1020 5 V E L E C T R I C A L O P E R AT I N G C H A R A C T E R I S T I C S ( U n l e s s o t h e r w i s e s p e c i f i e d T j = 2 5 C , V + = 5 V, V- = 0 V, R L > 1 M ) Symbol VO S IB IO S RIN IS GBW AV SR PSRR Parameter Input Offset Voltage Input Bias Current Input Offset Current Input Resistance Supply Current Gain Bandwidth Product Large Signal Voltage Gain Slew Rate Power Supply Rejection Ratio VO U T = 0.2V to 4.8V AV = -1, RL = 100K V+ = 2.5V to 2.8V V- = -2.5V to -2.8V VCM = 0V 0V < VCM < 4V Conditions VO U T = 2.5V Typ 1 0.5 1 100 1.8 90 1.2 80 70 0 4.3 AV = -1, f = 1KHz, VO U T = 4Vp-p RL = 100K Source/Sink RL = 10K 0.02 25 20 150 70 0.3 55 50 200 Limit 5 Unit mV pA pA T A MHz dB V/s dB dB V % mA mV CMRR VC M THD IS C VO Common Mode Rejection Ratio Common Mode Input Range Total Harmonic Distortion Output Short Circuit Current Output Swing from either rail (c) 2000 California Micro Devices Corp. All rights reserved. 5/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 5 CALIFORNIA MICRO DEVICES CMV1020 Open Loop Phase Response RL = 1MEG Open Loop Voltage Gain Response RL = 1MEG RL = 100K RL = 10K V+ = 5V V- = 0V TA = 25C RL = 10K RL = 100K V+ = 5V V- = 0V TA = 25C AVOL (dB) Phase () Frequency(Hz) Frequency(Hz) Large Signal Pulse Response Supply Current Versus Supply Voltage V+ = 5V V- = 0V RL = 100K TA = 25C Supply Current (A) TA = 85C TA = 25C TA = -40C VOUT (V) Time(s) Supply Voltage(V) Non Inverting Small Signal Response RL = 10K RL = 100K Inverting Small Signal Response V+ = 5V V- = 0V TA = 25C RL = 10K V+ = 5V V- = 0V TA = 25C RL = 100K VOUT (V) Time(s) VOUT (V) Time(s) (c)2000 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 5/00 CALIFORNIA MICRO DEVICES CMV1020 Current Sourcing Versus VOUT Common Mode Rejection Ratio VS = 2.5V -2.5V < Vin < 2V TA = 25C VOS (mV) IOUT V+ = 5V V- = 0V TA = 25C VOUT is referenced to V+ Vin(V) VOUT(V) Current Sinking Versus VOUT V+ = 5V V- = 0V TA = 25C IOUT VOUT is referenced to V- VOUT(V) (c) 2000 California Micro Devices Corp. All rights reserved. 5/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 7 CALIFORNIA MICRO DEVICES CMV1020 ground in a single rail application or to the opposite supply voltage in split rail applications. Since device only draws 60A supply current (100A maximum), its contribution to the junction temperature, TJ, is negligible. As an example, let us analyze a situation in which the CMV1020 is operated from a 5 volt supply and ground, the output is "programmed" to positive saturation, and the output pin is indefinitely shorted to ground. In general: PDISS = (V+ - VOUT)*IOUT + IS*V+ Where: PDISS = Power dissipated by the chip V+ = Supply voltage VOUT = The output voltage IS = Supply Current The contribution to power dissipation due to supply current is 200W and is indeed negligible as stated above. The primary contribution to power dissipation occurs in the output stage. V+ - VOUT would equal 5V - 0V = 5V, and power dissipation would be equal to 35mW. TJ = TA + JA* PDISS Where: TA = The ambient temperature JA = The thermal impedance of the package junction to ambient The SOT23 exhibits a JA equal to 325C/W. Thus for our example the junction rise would be about 11.4 which is clearly not a destructive situation even under an ambient temperature of 85C. Applications Information 1. Input Common Mode Range and Output Voltage Considerations The CMV1020 is capable of accommodating an input common mode voltage equal to one volt below the positive rail and all the way to the negative rail. It is also capable of output voltages equal to both power supply rails. Voltages that exceed the supply voltages will not 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 5mA are allowed to flow in them. This can occur when the magnitude of input voltage exceeds the rail by more than 0.3 volt. To preclude damage, an applications resistor, RS, in series with the input is recommended as illustrated in Figure 1 whose value for Rs is given by: VIN - (V+ + 0.3V) RS > ------------------ 5 mA For V+ (or V-) equal to 2.2 volts and VIN equal to 10 volts, RS should be chosen for a value of 2.5K or greater. 3. Input Impedance Considerations The CMV1020 exhibits an input impedance typically in excess of 1 Tera (1 X 10 12 ohms) making it very appropriate for applications involving high source impedance such as photodiodes and high output impedance transducers or long time constant integrators. High source impedances usually dictate large feedback resistors. But, the output capacitance of the source in parallel with the input capacitance of the CMV1020 (which is typically 3pF) create a parasitic pole with the feedback resistor which erodes the phase margin of the amplifier. The usual fix is to bypass, RF, as shown in Figure 2 with a small capacitor to cancel the input pole. The usual formula for calculating CF always results in a value larger than that is required: 1 1 ---------- ---------- 2 RF CF 2 RS CS Since the parasitic capacitance can change between the breadboard and the production printed circuit board, we favor the use of a "gimmick", a technique Fax: (408) 263-7846 www.calmicro.com Figure 1. 2. Output Current and Power Dissipation Considerations The CMV1020 is capable of sinking and sourcing output currents in excess of 7mA at voltages very nearly equal to the rails. As such, it does not have any internal short circuit protection (which would in any event detract from its rail to rail capability). Although the power dissipation and junction temperature rise are small, a short analysis is worth investigating. Obviously, the worst case from a power dissipation point of view is when the output is shorted to either (c)2000 California Micro Devices Corp. All rights reserved. 8 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 5/00 CALIFORNIA MICRO DEVICES perfected by TV technicians in the 1950's. A gimmick is made by taking two lengths (typically about a foot) of small gauge wire such as AWG 24, twisting them together, and then after baring all ends soldering the gimmick across RF. With the circuit operating, CF is "adjusted" by clipping short lengths of the gimmick off until the compensation is nominal. Then simply remove the gimmick, take it to an impedance bridge, and select the capacitor accordingly. CMV1020 6. Typical Applications Operational amplifiers have been used for years to generate frequency stable oscillators, but the circuit shown in Figure 4 provides a stable frequency operating from a single supply voltage and drawing a mere 40A. For (R1 + R2) / R1 = 0.473, the period, T, of the oscillator is given by: T = 2 R F C1 Where: RF is the feedback resistor C1 is the capacitor The period is easily adjusted by varying RF. R3 ensures that the circuit will start on a single rail by forcing A1's output to the positive rail. R4's value is not critical but should be a factor of 10 greater than the parallel combination of R1 and R2. The circuit lends itself to a variety of applications such as battery operated toys where a stable frequency is required and low supply current is a must to maintain battery life. 4. Capacitive Load Considerations The CMV1020 is capable of driving capacative loads in excess of 100pF without oscillation. However, significant peaking will result. Probably the easiest way minimize this problem is to use an isolation resistor as shown in Figure 3. Figure 4 Personal Computers including laptops are available with sophisticated and high quality audio capabilities. Battery conservation is a key issue with laptop computers, and the circuit in Figure 5 utilizes the low supply current of the CMV1020, its rail to rail output voltage swing, and its high output current drive to provide the interface to the microphone input. A1 is used to provide the common mode bias for A2 by buffering the VREF output (typically 2.2 volts) of the Codec and to supply bias to the microphone. R1 should be selected for the appropriate bias for the microphone. R3 and C2 provide low pass filtering for noise, and the closed loop gain of A2 is adjusted by the ratio of R5 to R4. Figure 3 5. Power Supply Decoupling The CMV1020 is not prone to oscillation without the use of power supply decoupling capacitors, however to minimize hum and noise pick-up, it is recommended that the rails be bypassed with 0.01F capacitors. (c) 2000 California Micro Devices Corp. All rights reserved. 5/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 9 CALIFORNIA MICRO DEVICES CMV1020 Figure 5 (c)2000 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 5/00 |
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