Features. Ordering Information. Part Number Standard Marking Pb-Free Marking

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1 MIC9 MIC9 8MHz Low-Power SC-7 Op Amp General Description The MIC9 is a high-speed operational amplifier with a gain-bandwidth product of 8MHz. The part is unity gain stable. It has a very low µa supply current, and features the SC-7 package. Supply voltage range is from ±.V to ±9V, allowing the MIC9 to be used in low-voltage circuits or applications requiring large dynamic range. The MIC9 is stable driving any capacitative load and achieves excellent PSRR and CMRR, making it much easier to use than most conventional high-speed devices. Low supply voltage, low power consumption, and small packing make the MIC9 ideal for portable equipment. The ability to drive capacitative loads also makes it possible to drive long coaxial cables. Features 8MHz gain bandwidth product MHz 3dB bandwidth µa supply current SC-7 or SOT-3- packages 3V/µs slew rate Drives any capacitive load Unity gain stable Applications Video Imaging Ultrasound Portable equipment Line drivers Ordering Information Part Number Standard Marking Pb-Free Marking Ambient Temperature Package MIC9BM A37 4ºC to +8ºC SOT-3-* MIC9BC A37 MIC9YC A37 4ºC to +8ºC SC-7- * Contact factory for availability of SOT-3- package. Note: Underbar marking may not be to scale. Pin Configuration IN V IN+ 3 A37 Part Identification Functional Pinout IN 3 V IN+ 4 OUT 4 OUT SOT-3- or SC-7 SOT-3- or SC-7 Pin Description Pin Number Pin Name Pin Function IN+ Noninverting Input V Negative Supply (Input) 3 IN Inverting Input 4 OUT Output: Amplifier Output Positive Supply (Input) 8 Fortune Drive San Jose, CA 93 USA tel + (48) fax + (48) March 6 MIC9

2 MIC9 Absolute Maximum Ratings (Note ) Supply Voltage (V V V )... V Differentail Input Voltage ( V IN+ V IN )... 4V, Note 3 Input Common-Mode Range (V IN+, V IN )...V to V V Lead Temperature (soldering, sec.)... 6 C Storage Temperature (T S )... C ESD Rating, Note 4....kV Operating Ratings (Note ) Supply Voltage (V S )...±.V to ±9V Junction Temperature (T J )... 4 C to +8 C Package Thermal Resistance... SOT C/W SC C/W Electrical Characteristics (±V) = +V, V = V, V CM = V, R L = MΩ; T J = C, bold values indicate 4 C T J +8 C; unless noted. Symbol Parameter Condition Min Typ Max Units V OS Input Offset Voltage.43 mv V OS V OS Temperature Coefficient µv/ C I B Input Bias Current.6.6 µa I OS Input Offset Current.4.3 µa V CM Input Common-Mode Range CMRR > 7dB V CMRR Common-Mode Rejection Ratio.V < V CM < +.V 7 8 db PSRR Power Supply Rejection Ratio ±3.V < V S < ±9V 9 4 db A VOL Large-Signal Voltage Gain R L = k, V OUT = ±V 6 8 db R L = Ω, V OUT = ±V 8 db V OUT Maximum Output Voltage Swing positive, R L = kω V negative, R L = kω V positive, R L = Ω V negative, R L = Ω, Note.. V GBW Unity Gain-Bandwidth Product =.7pF 67 MHz PM Phase Margin 3 BW 3dB Bandwidth Av =, R L = kω, =.7pF MHz SR Slew Rate C=.7pF, Gain=, V OUT =V, peak to peak, 3 V/µs positive SR = 9V/µs I SC Short-Circuit Output Current source 4 63 ma sink 4 ma I S Supply Current No Load..8 ma Input Voltage Noise f = khz V/ Hz Input Current Noise f = khz.7 A/ Hz Electrical Characteristics = +9V, V = 9V, V CM = V, R L = MΩ; T J = C, bold values indicate 4 C T J +8 C; unless noted Symbol Parameter Condition Min Typ Max Units V OS Input Offset Voltage.3 mv V OS Input Offset Voltage µv/ C Temperature Coefficient I B Input Bias Current.3.6 µa I OS Input Offset Current.4.3 µa V CM Input Common-Mode Range CMRR > 7dB V CMRR Common-Mode Rejection Ratio 6.V < V CM < +6.V 6 9 db PSRR Power Supply Rejection Ratio ±3.V < V S < ±9V 9 4 db MIC9 March 6

3 MIC9 Symbol Parameter Condition Min Typ Max Units A VOL Large-Signal Voltage Gain R L = k, V OUT = ±V 7 84 db R L = Ω, V OUT = ±V 93 db V OUT Maximum Output Voltage Swing positive, R L = kω V negative, R L = kω V GBW Unity Gain-Bandwidth Product =.7pF 8 MHz PM Phase Margin 3 BW 3dB Bandwidth A V =, R L = kω, =.7pF MHz SR Slew Rate C=.7pF, Gain=, V OUT =V, peak to peak, 3 V/µs negative SR = V/µs I SC Short-Circuit Output Current source 6 ma sink 3 ma I S Supply Current No Load..8 ma Input Voltage Noise f = khz V/ Hz Input Current Noise f = khz.8 A/ Hz Note. Note. Note 3. Note 4. Note. Exceeding the absolute maximum rating may damage the device. The device is not guaranteed to function outside its operating rating. Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is likely to change). Devices are ESD sensitive. Handling precautions recommended. Human body model,.k in series with pf. Output swing limited by the maximum output sink capability, refer to the short-circuit current vs. temperature graph in Typical Characteristics. March 6 3 MIC9

4 MIC9 Test Circuits µf Input Ω.µF.µF R k µf Input k k k Ω 3 MIC9 k.µf.µf 4 Output Input R k R7c k R7b Ω R7a Ω All resistors % R6 k R3 k R4 Ω 3 R k MIC9 V.µF 4.µF µf Output All resistors: % metal film V µf R R + R + R4 VOUT = VERROR + + R R7 PSRR CMRR pf R 4k pf µf µf R Ω R Ω R3 7k S S R4 7k 3 MIC9.µF 4.F To Dynamic Analyzer V IN Ω 3 MIC9.µµF 4.µF k 3Ω V OUT FET Probe pf µf V µf V Noise Measurement Closed Loop Frequency Response Measurement MIC9 4 March 6

5 MIC9 Typical Characteristics OFFSET VOLTAGE (mv) Offset Voltage vs. Temperature V± = ±.V TEMPERATURE ( C) SUPPLY CURRENT (ma) Supply Current vs. Temperature V± = ±.V TEMPERATURE ( C) SUPPLY CURRENT (ma) Supply Current vs. Supply Voltage C C C SUPPLY VOLTAGE (V) OFFSET VOLTAGE (mv) Offset Voltage vs. Common-Mode Voltage. V± = ±.V C.4. + C C COMMON-MODE VOLTAGE (V) OFFSET VOLTAGE (mv) Offset Voltage vs. Common-Mode Voltage C + C +8 C COMMON-MODE VOLTAGE (V) OFFSET VOLTAGE (mv) Offset Voltage vs. Common-Mode Voltage C + C +8 C COMMON-MODE VOLTAGE (V) SHORT-CIRCUIT CURRENT (ma) Short-Circuit Current vs. Supply Voltage (Sourcing) C 68 C C SUPPLY VOLTAGE (V) SHORT-CIRCUIT CURRENT (ma) Short-Circuit Current vs. Supply Voltage (Sinking) C 4 8 C C SUPPLY VOLTAGE (V) VOLTAGE (V) Output Voltage vs. Output Current (Sourcing) 8 C 4 C C CURRENT (ma) VOLTAGE (V) Output Voltage vs. Output Current (Sinking) 8 C C 4 C CURRENT (ma) OUTOUT VOLTAGE (V) Output Voltage vs. Output Current (Sourcing) 4 C 8 C C CURRENT (ma) OUTOUT VOLTAGE (V) Output Voltage vs. Output Current (Sinking) C 8 C C CURRENT (ma) March 6 MIC9

6 MIC9 B IAS CURRENT ( µ A ) Bias Current vs. Temperature ±9V ±V TEMPERATURE ( C) GAIN (db) Closed-Loop Frequency Response Av = R+ = R I = 47Ω ±.V ±.V ±9.V E+6 M E+6 M E+6 M E+6 GAIN (db) Closed-Loop Frequency Response Av = R F = R I = 47Ω ±.V ±.V ±9.V E+6 M E+6 M E+6 M E+6 CLOSED-LOOP GAIN (db) Closed-Loop Gain 4 3 4pF pf pf - pf 8pF - 6pF -3-4 Av = - E+6 M E+6 M E+6 M E+6 CLOSED-LOOP GAIN (db) Closed-Loop Gain pf 8pF 6pF pf 4pF pf.7pf -4 Av = - E+6 M E+7 M E+8E+8 M OPEN-LOOP GAIN (db) pf 47pF pf Open-Loop Gain pf pf.7pf -4 - x M 6 x M 6 x M x 6 OPEN-LOOP GAIN (db) pf 47pF pf Open-Loop Gain pf pf.7pf -4 - x M 6 x M 6 x M x 6 GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs. Supply Voltage 8 Phase Margin Gain Bandwidth SUPPLY VOLTAGE (±V) P HASE MARGIN ( ) GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs. Load Phase Margin Gain Bandwidth CAPACITIVE LOAD (pf) P HASE MARGIN ( ) GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs. Load Phase Margin Gain Bandwidth CAPACITIVE LOAD (pf) P HASE MARGIN ( ) GAIN BANDWIDTH (db) Open-Loop Frequency Response Gain Ω No Load Ω 8 3 Phase k M M M CAPACITIVE LOAD (pf) P HASE MARGIN ( ) GAIN BANDWIDTH (db) Open-Loop Frequency Response Gain Ω No Load Ω Phase k M M M CAPACITIVE LOAD (pf) -3 P HASE MARGIN ( ) -8 - MIC9 6 March 6

7 MIC9 Positive PSRR Negative PSRR Positive PSRR PSRR (db) PSRR (db) PSRR (db) k k FREQUENCY (khz). k k FREQUENCY (khz). k k FREQUENCY (khz) PSRR (db) Negative PSRR. k k FREQUENCY (khz) CMRR (db) Common-Mode Rejection Ratio k k k M M x x 3 x 3 x 3 x 6 x 6 CMRR (db) Common-Mode Rejection Ratio k k k M M x x 3 x 3 x 3 x 6 x 6 S LEW RATE (V/ µ s ) Positive Slew Rate S LEW RATE (V/ µ s ) Negative Slew Rate S LEW RATE (V/ µ s ) 3 3 Positive Slew Rate LOAD CAPACITANCE (pf) LOAD CAPACITANCE (pf) LOAD CAPACITANCE (pf) S LEW RATE (V/ µ s ) 3 Negative Slew Rate LOAD CAPACITANCE (pf) / N OISE VOLTAGE (nv/hz ) Voltage Noise Density / N OISE CURRENT (pa/hz )..... Current Noise Density March 6 7 MIC9

8 MIC9 Functional Characteristics (mv/div) = ±9.V =.7µF Av =.V/V (mv/div) = ±.V =.7µF Av =.V/V (mv/div) (mv/div) TIME (ns/div) TIME (ns/div) (mv/div) = ±9.V = pf Av = + (mv/div) = ±.V = pf Av = +V/V (mv/div) (mv/div) TIME (ns/div) TIME (ns/div) (mv/div) = ±9.V = pf Av = +V/V (mv/div) = ±.V = pf Av = +V/V (mv/div) (mv/div) TIME (ns/div) TIME (ns/div) MIC9 8 March 6

9 MIC9 Large Signal Response Large Signal Response V = ±V =.7pF Av = Positive SR = 3V/µsec Negative SR = 9V/sec (V/div) (V/div) V = ±9V =.7pF Av = Positive SR = 3V/µsec Negative SR = V/µsec TIME (ns/div) TIME (ns/div) Large Signal Reponse Large Signal Response V = ±V = pf Av = Positive SR = 373V/µsec Negative SR = 9V/sec (V/div) (V/div) V = ±9V = pf Av = Positive SR = 67V/µsec Negative SR = 44V/sec TIME (ns/div) TIME (ns/div) Large Signal Response Large Signal Response V = ±V = pf Av = Positive SR = 7V/µsec Negative SR = 4V/sec Output (V/div) (V/div) V = ±9V = pf Av = Positive SR = 97V/µsec Negative SR = 6V/sec TIME (ns/div) TIME (ns/div) March 6 9 MIC9

10 MIC9 Applications Information The MIC9 is a high-speed, voltage-feedback operational amplifier featuring very low supply current and excellent stability. This device is unity gain stable, capable of driving high capacitance loads. Driving High Capacitance The MIC9 is stable when driving high capacitance, making it ideal for driving long coaxial cables or other high-capacitance loads. Most high-speed op amps are only able to drive limited capacitance. Note: increasing load capacitance does reduce the speed of the device. In applications where the load capacitance reduces the speed of the op amp to an unacceptable level, the effect of the load capacitance can be reduced by adding a small resistor (<Ω) in series with the output. Feedback Resistor Selection Conventional op amp gain configurations and resistor selection apply, the MIC9 is NOT a current feedback device. Also, for minimum peaking, the feedback resistor should have low parasitic capacitance, usually 47Ω is ideal. To use the part as a follower, the output should be connected to input via a short wire. Layout Considerations All high speed devices require careful PCB layout. The following guidelines should be observed: Capacitance, par-ticularly on the two inputs pins will degrade performance; avoid large copper traces to the inputs. Keep the output signal away from the inputs and use a ground plane. It is important to ensure adequate supply bypassing capacitors are located close to the device. Power Supply Bypassing Regular supply bypassing techniques are recommended. A µf capacitor in parallel with a.µf capacitor on both the positive and negative supplies are ideal. For best performance all bypassing capacitors should be located as close to the op amp as possible and all capacitors should be low ESL (equivalent series inductance), ESR (equivalent series resis-tance). Surface-mount ceramic capacitors are ideal. Thermal Considerations The SC7- package and the SOT-3- package, like all small packages, have a high thermal resistance. It is important to ensure the IC does not exceed the maximum operating junction (die) temperature of 8 C. The part can be operated up to the absolute maximum temperature rating of C, but between 8 C and C performance will degrade, in par-ticular CMRR will reduce. An MIC9 with no load, dissipates power equal to the quiescent supply current supply voltage ( ) P D(no load) = V V V- I S When a load is added, the additional power is dissipated in the output stage of the op amp. The power dissipated in the device is a function of supply voltage, output voltage and output current. ( ) P D(output stage) = V V OUT I OUT Total Power Dissipation = P D(no load) + P D(output stage) Ensure the total power dissipated in the device is no greater than the thermal capacity of the package. The SC7- package has a thermal resistance of 4 C/W. Max. Allowable Power Dissipation = T J(max) T A(max) 4 C/W MIC9 March 6

11 MIC9 Package Information SOT-3- (M) SC-7 (C) MICREL INC. 8 FORTUNE DRIVE SAN JOSE, CA 93 USA TEL + (48) FAX + (48) 474- WEB This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. March 6 MIC9