CMV7101

CMV7101 CALMIRCO | Alldatasheet

Document overview

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Technical content

Features

• Tiny SOT23-5 Package • Guaranteed specs at 2.2V and 3V • Very Low Supply current, typically 300µA • Rail-to-Rail Input and Output (RRIO) • Typical Total Harmonic Distortion of 0.01% at 3V • 1MHz Typical Gain-Bandwidth Product • Input common mode range includes V- and V+ C0670300 CMV7101 Low Power, Low Voltage OPAMP with RRIO, SOT23-5

Applications

• Mobile Communications • Cellular Phones • Battery operated Systems • Notebooks and PDAs • Electronic Toys Product Description The CMV7101 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. Performance is superior to the industry standard “7101” SOT Amp. With enhancements of very low supply current, typically 300µA, much higher output drive current, and further enhanced operation at very low 2.2V supply voltage compared to our CMC7101 at 2.7V supply voltage, the CMV7101 is the economical solution for 3V applications. Ideal for use in personal electronics such as cellular handsets, pagers, cordless telephones and other products with limited space and battery power. MARGAIDNIP TS RADNA NOITAMROFNIGNIREDROTRAPD egakcaPr ebmuNtraPgniredrO sniPe lytSs ebuTl eeR&epaTg nikraMtraP 55 -32TOST /Y1017VMCR /Y1017MC1 01V

'2000 California Micro Devices Corp. All rights reserved. 3/00215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com CMV7101 )1etoN(SGNITARMUMIXAMETULOSBA retemaraPg nitaRs tinU )2etoNees(ecnareloTDSE0 00,2V egatloVtupnIlaitnereffiD+ egatloVylppuSV niPtuptuO/tupnItaegatloVV 3.0-)-V(,V3.0+)+V(V )-Vot+V(egatloVylppuS5 .7V niPtupnItatnerruC5 A m )3etoNees(niPtuptuOtatnerruC5 3A m sniPylppuSrewoPtatnerruC5 3A m ).ces01,gniredlos(erutarepmeTdaeL0 62 oC egnaRerutarepmeTegarotS0 51+ot56- oC )4etoNees(erutarepmeTnoitcnuJ0 51 oC SNOITIDNOCGNITAREPO )esiwrehtodeificepssselnu( retemaraPg nitaRs tinU egatloVylppuS2 .2< +V< 7V egnaRerutarepmeTnoitcnuJ0 4-< TJ < 58+ oC ecnatsiseRlamrehT5 23 o W/C SCITSIRETCARAHCGNITAREPOLACIRTCELEV2.2 Trofdeetnaraugstimillla,deificepsesiwrehtosselnU J R,V0=-V,V2.2=+V,C°52= L M1> Ω lobmySr etemaraPs noitidnoC PYTT IMIL TINU V SO egatloVtesffOtupnIV TUO V1.1=1 1.08 V m VCT SO egarevAegatloVtesffOtupnI tfirD 1 µ /V oC IB tnerruCsaiBtupnI 1A p I SO tnerruCtesffOtupnI 5.0A p R NI ecnatsiseRtupnI 1T Ω RRMCo itaRnoitcejeRedoM-nommoCV <2.0 MC V0.2<0 60 5B d V MC edoMnommoCtupnIV =+V0 2 .0V egnaRegatloVB d05>RRMCroF2 .20 .2V RRSP oitaRnoitcejeRylppuSrewoP V56.1otV53.1=+V V56.1-otV53.1-=-V V MC 0= 060 5B d C NI ecnaticapaCtupnIedoM-nommoC 3F p VO gniwStuptuOR L 006= Ω 1.2V 1.0V RL K2= Ω 1.28 .1V 1.04 .0V RL K01= Ω 51.20 .2V 20.02 .0V IS tnerruCylppuS 52.00 8.0A m RSe taRwelS 6.0/ V µs WBGt cudorPhtdiwdnaBniaG 7.0z HM

' 2000 California Micro Devices Corp. All rights reserved. 3/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com CALIFORNIA MICRO DEVICES CMV7101 Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating conditions indicate ratings fo r 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, 1.5KW 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 150°C. Note 4 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. Note 5 See Application Section. SCITSIRETCARAHCGNITAREPOLACIRTCELEV3 Trofdeetnaraugstimillla,deificepsesiwrehtosselnU J R,V0=-V,V3=+V,C°52= L M1> Ω lobmySr etemaraPs noitidnoC PYTT IMIL TINU V SO egatloVtesffOtupnIV TUO V5.1=1 1.04 V m VCT SO egarevAegatloVtesffOtupnI tfirD 1 µ /V oC IB tnerruCsaiBtupnI 1A p I SO tnerruCtesffOtupnI 5.0A p R NI ecnatsiseRtupnI 1T Ω RRMCo itaRnoitcejeRedoM-nommoCV <0 MC V3<5 5B d V MC edoMnommoCtupnIV =+V0 .00 .0V egnaRegatloVB d05>RRMCroF3 .30 .3V RRSP oitaRnoitcejeRylppuSrewoP V8.1otV5.1=+V V8.1-otV5.1-=-V V MC 0= 088 6B d C NI ecnaticapaCtupnIedoM-nommoC 3F p VO gniwStuptuOR L 006= Ω 9.26 .2V 1.04 .0V RL K2= Ω 9.26 .2V 1.04 .0V RL K01= Ω 99.27 .2V 10.03 .0V IS tnerruCylppuS 3.01 8.0A m RSe taRwelS 9.0/ V µs WBGt cudorPhtdiwdnaBniaG 0.1z HM I CS tnerruCtiucriCtrohStuptuO) 5etoNees(V0=oVgnicruoS6 1A m )5etoNees(V3=oVgnikniS1 1A m .D.H.Tn oitrotsiDcinomraHlatoT2 -=vA,zHK01=F1 0.0% K01=LR Ω ppV0.2=oV,

'2000 California Micro Devices Corp. All rights reserved. 3/00215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com CMV7101

' 2000 California Micro Devices Corp. All rights reserved. 3/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com CALIFORNIA MICRO DEVICES CMV7101

'2000 California Micro Devices Corp. All rights reserved. 3/00215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com CMV7101 Applications Benefits

1.0 Packaging

The most obvious benefit to using the CMV7101 is the SOT package, which has been widely accepted as the surface mounting of choice. The SOT23 footprint not only saves space on the PCB but also provides a low profile for applications such as the PCMCIA, type III cards which require heights less than 0.056 Inches (1.43 mm).

1.2 Signal Integrity

As systems have become smaller and higher functionality is demanded of them, spacing between traces has diminished as well. This can result in increased sensitivity to noise, pick-up, and cross talk. Due to its small size, the CMV7101 may be placed in close proximity to the signal source minimizing the above problems, and since it is a single device, routing traces to a multiple amplifier such as dual or quad avoids running long traces reducing cross talk. The Rail to Rail Inputs and Output allow the amplifier to operate on a low supply voltages while maintaining signal tracking integrity and large output voltage swings (relative to the supply rail).

1.3 Low Distortion

Even when operated from a 2.2 volt supply, the CMV7101 still exhibits very low distortion thanks to its large open loop gain and unique circuit design making it suitable for application in many audio systems.

1.4 Low Supply Current and High Output Current

The supply current required by CMV7101 of 300 µA coupled with its ability to sink and source large currents of 50 mA make it unique in its class. Clearly, the low supply current provides longer operation in battery operated systems while the high output current assures that circuits with capacitive loads will “starter” faster. The high output current also eliminates the need for a buffer, such as an emitter follower, in the loop with the amplifier for applications demanding large load currents. Applications Information

2.0 Input Common Mode and Output Voltage

The CMV7101 will accommodate input common mode voltages equal to both rails, and input signals that exceed the rails will not cause phase inversion of the output. However, ESD diode clamps are provided at the inputs that can be damaged if currents in excess of 5 mA when the input voltage exceeds the rail by 0.3 volt. Damage can be precluded by inserting a limiting resistor, Rs, in series with the input whose recommend value may be calculated from: Vin - (V+ - 0.3 V) Rs > (1) 5 mA For V+ equal to 2.2 volts, and Vin equal to a maximum of 5 volts, Rs should be chosen for a value of 500 Ω or greater.

2.1 Output Current and Power Dissipation

The CMV7101 is capable of sinking or sourcing output currents in excess of 50 mA and voltages nearly equal to the supply voltage. The device does not have internal short circuit limiting, but it is capable of withstanding an indefinite short circuit without sustaining damage. Clearly the maximum power dissipation will occur under these conditions: Pdiss = (V+ - Vout) * Iout (2) Where: Pdiss = Power dissipated by the chip V+ = Supply Voltage Vout = The Output Voltage Furhermore, T J = TA + θJA (3) Where TA = The Ambient Temperature θJA = The thermal impedance of the package For a short circuit on the output with V+ equal to 3 volts and an output current of 50 mA, the power dissipation per equation (2) would be 150 mW. Assuming a worst case ambient of 85 °C, the junction temperature would be 134 °C well below the maximum junction rating of 150 °C.

2.2 Input Considerations

The CMV7101 exhibits an input impedance which is typically in excess of 1 Tera W making it an excellent choice for applications requiring high source impedance such as buffering photo diodes, high impedance transducers, or long time constant integraters. A high source impedance usually dictates a large feedback resistor, R f, but the parallel combination of R f and R s in parallel with the input capacitance of the amplifier (typically 3 pF) creates a parasitic pole which can erode the phase margin of the amplifier. The recommended fix is to bypass R f with a small capacitor thus canceling the pole at the inverting input. The formula

' 2000 California Micro Devices Corp. All rights reserved.

2 Rs 2 Rf

capacitance of the gimmick on an impedance bridge.

2.3 Capacitive Load Considerations

use an isolation resistor as shown in Figure 2.

2.4 Power Supply Decoupling

the rails be bypassed with 0.01 µF capacitors.

3.0 Low Power and Supply Voltage Single Rail Oscillator

10 greater than the parallel combination of R1 and R2. that the LED will have sufficient current to turn it on. Figure 1. Input Capacitance Compensation Figure 2. Isolating a Capacitve Load Figure 3. Single Rail Oscillator