MIC915 Dual 135MHz Low-Power Op Amp General Description Features The MIC915 is a high-speed, unity-gain stable operational amplifier. It provides a gain-bandwidth product of 135MHz with a very low, 2.4mA supply current per op amp. • • • • • Supply voltage range is from ±2.5V to ±9V, allowing the MIC915 to be used in low-voltage circuits or applications requiring large dynamic range. The MIC915 is stable driving any capacitive load and achieves excellent PSRR, making it much easier to use than most conventional high-speed devices. Low supply voltage, low power consumption, and small packaging make the MIC915 ideal for portable equipment. The ability to drive capacitive loads also makes it possible to drive long coaxial cables. 135MHz gain bandwidth product 2.4mA supply current per op amp 10-pin MSOP package 270V/µs slew rate Drives any capacitive load Applications • • • • • Video Imaging Ultrasound Portable equipment Line drivers Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Functional Pinout 10-Pin MSOP Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com September 24, 2014 Revision 2.0 Micrel, Inc. MIC915 Ordering Information Part Number Junction Temperature Range Package MIC915YMM –40°C to +85°C 10-Pin MSOP Pin Configuration 10-Pin MSOP (MM) (Top View) Pin Description Pin Number (1) Pin Name Pin Function 1 INA− Inverting input of operational amplifier A. 2 INA+ Noninverting input of operational amplifier A. 3 V+(A) 4 INB− Positive supply input for operational amplifier A. Connect a 10µF capacitor in parallel with a 0.1µF capacitor to ground. Inverting input of operational amplifier B. 5 INB+ Noninverting input of operational amplifier B. 6 V+(B) 7 OUTB 8 V−(B) 9 OUTA 10 V−(A) Positive supply input for operational amplifier B. Connect a 10µF capacitor in parallel with a 0.1µF capacitor to ground. Output of operational amplifier B. Negative supply input for operational amplifier B. Connect a 10µF capacitor in parallel with a 0.1µF capacitor to ground. Output of operational amplifier A. Negative supply input for operational amplifier A. Connect a 10µF capacitor in parallel with a 0.1µF capacitor to ground. Note: 1. V− pins must be externally shorted together. September 24, 2014 2 Revision 2.0 Micrel, Inc. MIC915 Absolute Maximum Ratings(2) Operating Ratings(3) Supply Voltage (VV+ − VV−) ........................................... +20V (4) Differential Input Voltage (|VIN+ − VIN−|). ........................ 8V Input Common-Mode Range (VIN+, VIN−) ...............VV+ to VV− Lead Temperature (soldering, 5s) ............................ +260°C Storage Temperature (TS) ........................................ +150°C (5) ESD Rating ............................................................... 1.5kV Supply Voltage (VS) ......................................... ±2.5V to ±9V Junction Temperature (TJ) .......................... –40°C to +85°C Package Thermal Resistance 10-Pin MSOP (θJA) ......................................... +160°C/W Electrical Characteristics (±5V) VV+ = +5V; VV− = −5V, VCM = 0V, VOUT = 0V; RL = 10MΩ; TJ = +25°C, bold values indicate –40°C ≤ TJ ≤ +85°C, unless noted. Symbol VOS Parameter Condition Min. Typ. Max. Units Input Offset Voltage 1 15 mV Input Offset Voltage Temperature Coefficient 4 3.5 IB Input Bias Current IOS Input Offset Current VCM Input Common-Mode Range CMRR > 60dB CMRR Common-Mode Rejection Ratio −2.5V < VCM < +2.5V PSRR Power Supply Rejection Ratio ±5V < VS < ±9V AVOL Large-Signal Voltage Gain 5.5 µA 9 0.05 −3.25 70 74 +3.25 V dB 81 dB 70 71 RL = 200Ω, VOUT = ±2V 60 71 +3.3 3.5 dB +3.0 −3.5 Negative, RL = 2kΩ Positive, RL = 200Ω µA 60 60 Maximum Output Voltage Swing 3 90 RL = 2kΩ, VOUT = ±2V Positive, RL = 2kΩ VOUT µV/°C −3.3 −3.0 +3.0 V 3.2 +2.75 Negative, RL = 200Ω −2.8 −2.45 −2.2 GBW Gain Bandwidth Product RL = 1kΩ 125 MHz BW −3dB Bandwidth AV = 1, RL = 100Ω 192 MHz SR Slew Rate 230 V/µs Notes: 2. Exceeding the absolute maximum ratings may damage the device. 3. The device is not guaranteed to function outside its operating ratings. 4. Exceeding the maximum differential input voltage will damage the input stage and degrade performance as input bias current is likely to increase. 5. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF. September 24, 2014 3 Revision 2.0 Micrel, Inc. MIC915 Electrical Characteristics (±5V) (Continued) VV+ = +5V; VV− = −5V, VCM = 0V, VOUT = 0V; RL = 10MΩ; TJ = +25°C, bold values indicate –40°C ≤ TJ ≤ +85°C, unless noted. Symbol Parameter Condition Crosstalk f = 1MHz 82 Source 72 Sink 25 Short-Circuit Output Current IGND Min. Typ. 2.4 Supply Current per Op Amp Max. Units dB mA 3.5 4.1 Electrical Characteristics (±9V) VV+ = +9V; VV− = −9V, VCM = 0V, VOUT = 0V; RL = 10MΩ; TJ = +25°C, bold values indicate –40°C ≤ TJ ≤ +85°C, unless noted. Symbol VOS Parameter Condition Typ. Max. Units Input Offset Voltage 1 15 mV Input Offset Voltage Temperature Coefficient 4 3.5 IB Input Bias Current IOS Input Offset Current VCM Input Common-Mode Range CMRR > 60dB CMRR Common-Mode Rejection Ratio −6.5V < VCM < +6.5V AVOL Large-Signal Voltage Gain RL = 2kΩ, VOUT = ±6V 0.05 Maximum Output Voltage Swing Negative, RL = 2kΩ GBW Gain Bandwidth Product SR Slew Rate Crosstalk Short-Circuit Output Current IGND RL = 1kΩ 5.5 µA −7.25 70 3 µA +7.25 V 98 dB 60 60 73 +7.2 7.4 dB +6.8 −7.4 −7.2 V −6.8 135 MHz 270 V/µs f = 1MHz 82 dB Source 90 Sink 32 2.5 Supply Current per Op Amp September 24, 2014 µV/°C 9 Positive, RL = 2kΩ VOUT Min. 3.7 mA 4.3 4 Revision 2.0 Micrel, Inc. MIC915 Test Circuit PSRR vs. Frequency CMRR vs. Frequency Noise Measurement September 24, 2014 5 Revision 2.0 Micrel, Inc. MIC915 Typical Characteristics September 24, 2014 6 Revision 2.0 Micrel, Inc. MIC915 Typical Characteristics (Continued) September 24, 2014 7 Revision 2.0 Micrel, Inc. MIC915 Typical Characteristics (Continued) September 24, 2014 8 Revision 2.0 Micrel, Inc. MIC915 Typical Characteristics (Continued) September 24, 2014 9 Revision 2.0 Micrel, Inc. MIC915 Functional Characteristics September 24, 2014 10 Revision 2.0 Micrel, Inc. MIC915 Functional Characteristics (Continued) September 24, 2014 11 Revision 2.0 Micrel, Inc. MIC915 Application Information Power Supply Bypassing Regular supply bypassing techniques are recommended. A 10µF capacitor in parallel with a 0.1µF capacitor on both the positive and negative supplies is ideal. For best performance, all bypassing capacitors should be located as close to the op amp as possible and all capacitors should be low equivalent series inductance (ESL) and equivalent series resistance (ESR). Surface-mount ceramic capacitors are ideal. The MIC915 is a high-speed, voltage-feedback operational amplifier featuring very low supply current and excellent stability. This device is unity gain stable and capable of driving high capacitance loads. Driving High Capacitance The MIC915 is stable when driving any capacitance (see the “Gain Bandwidth and Phase Margin vs. Load Capacitance” graph in the Typical Operating Characteristics section) making it ideal for driving long coaxial cables or other high-capacitance loads. Note: Both V− pins must be externally shorted together. Thermal Considerations It is important to ensure the IC does not exceed the maximum operating junction (die) temperature of +85°C. The part can be operated up to the absolute maximum temperature rating of +125°C, but between +85°C and +125°C performance will degrade, in particular CMRR will reduce. Phase margin remains constant as load capacitance is increased. Most high-speed op amps are only able to drive limited capacitance. Note: Increasing load capacitance does reduce the speed of the device (see the “Gain Bandwidth and Phase Margin vs. Load” in the Typical Operating Characteristics section). 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 (<100Ω) in series with the output. A MIC915 with no load, dissipates power equal to the quiescent supply current × the supply voltage (Equation 1): Feedback Resistor Selection Conventional op amp gain configurations and resistor selection apply; the MIC915 is not a current feedback device. Resistor values in the range of 1kΩ to 10kΩ are recommended. PD(NO LOAD) = (VV+ − VV−)IS Eq. 1 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 (Equation 2). Layout Considerations All high-speed devices require careful PCB layout. The high stability and high PSRR of the MIC915 make it easier to use than most other op amps, but the following guidelines should be observed: PD(OUTPUT STAGE) = VV+ − VOUT)IOUT Eq. 2 • Capacitance, particularly 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. Ensure the total power dissipated in the device is no greater than the thermal capacity of the package. The 10pin MSOP package has a thermal resistance of 160°C/W (Equation 3): It is important to ensure adequate supply bypassing capacitors are located close to the device Maximum Allowable Power Dissipation = Total Power Dissipation = PD(NO LOAD) + PD(OUTPUT STAGE) TJ(MAX ) − TA(MAX ) 160°C / W September 24, 2014 12 Eq. 3 Revision 2.0 Micrel, Inc. MIC915 Package Information and Recommended Landing Pattern(6) 10-Pin MSOP (MM) Note: 6. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com. September 24, 2014 13 Revision 2.0 Micrel, Inc. MIC915 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN, and timing & communications markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products. Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the Americas, Europe, and Asia. Additionally, the Company maintains an extensive network of distributors and reps worldwide. Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. 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. © 2000 Micrel, Incorporated. September 24, 2014 14 Revision 2.0