MIC911 Micrel MIC911 105MHz Low-Power SOT-23-5 Op Amp General Description Features The MIC911 is a high-speed operational amplifier which is unity gain stable regardless of resistive and capacitive load. It provides a gain-bandwidth product of 105MHz, a very low 1.25mA supply current, and features the Ittybitty™ SOT-23-5 package. Supply voltage range is from ±2.5V to ±9V, allowing the MIC911 to be used in low-voltage circuits or applications requiring large dynamic range. The MIC911 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 MIC911 ideal for portable equipment. The ability to drive capacitative loads also makes it possible to drive long coaxial cables. • • • • • • • • 105MHz gain bandwidth product 1.25mA supply current Unconditionally unity gain stable Drives any capacitive load SOT-23-5 package 120V/µs slew rate 112dB CMRR Stable with gain of +2 or –1 Applications • • • • • • Video Imaging Ultrasound Portable equipment Line drivers XDSL Ordering Information Pin Configuration IN+ 3 Part Number Junction Temp. Range Package MIC911BM5 –40°C to +85°C SOT-23-5 Functional Pinout V+ OUT 2 1 IN+ Part Identification 3 V+ OUT 2 1 A22 4 5 4 5 IN– V– IN– V– SOT-23-5 SOT-23-5 Pin Description Pin Number Pin Name Pin Function 1 OUT 2 V+ Positive Supply (Input) 3 IN+ Noninverting Input 4 IN– Inverting Input 5 V– Negative Supply (Input) Output: Amplifier Output Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com June 2000 1 MIC911 MIC911 Micrel Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Supply Voltage (VV+ – VV–) ........................................... 20V Differentail Input Voltage (VIN+ – VIN–) .......... 4V, Note 3 Input Common-Mode Range (VIN+, VIN–) .......... VV+ to VV– Lead Temperature (soldering, 5 sec.) ....................... 260°C Storage Temperature (TS) ........................................ 150°C ESD Rating, Note 4 ................................................... 1.5kV Supply Voltage (VS) ....................................... ±2.5V to ±9V Junction Temperature (TJ) ......................... –40°C to +85°C Package Thermal Resistance ............................... 260°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 Parameter VOS Typ Max Units Input Offset Voltage 1 10 mV VOS Input Offset Voltage Temperature Coefficient 4 IB Input Bias Current 1.5 4 8 µA µA IOS Input Offset Current 0.03 2 3 µA µA VCM Input Common-Mode Range CMRR > 60dB +3.5 V CMRR Common-Mode Rejection Ratio –3V < VCM < +3V 80 110 dB PSRR Power Supply Rejection Ratio ±5V < VS < ±9V 75 88 dB AVOL Large-Signal Voltage Gain RL = 2k, VOUT = ±2V 65 78 dB RL = 200Ω, VOUT = ±1V 65 78 dB +3.3 +3.0 3.5 V V VOUT Maximum Output Voltage Swing Condition Min positive, RL = 2kΩ –3.5 negative, RL = 2kΩ positive, RL = 200Ω –3.5 +2.8 +2.5 negative, RL = 200Ω, Note 5 µV/°C –3.3 –3.0 3.2 –2.5 negative, RL = 200Ω, 25°C ≤ TJ ≤ +85°C, Note 5 V V V V –1.7 –1.0 V V –1.7 V GBW Unity Gain-Bandwidth Product RL = 1kΩ 95 MHz BW –3dB Bandwidth AV = 2, RL = 470Ω 70 MHz SR Slew Rate 100 V/µs IGND Short-Circuit Output Current source 65 mA sink 17 mA IGND Supply Current 1.25 1.8 2.3 mA mA Electrical Characteristics VV+ = +9V, VV– = –9V, VCM = 0V, VOUT = 0V; RL = 10MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted Symbol Parameter VOS Typ Max Units Input Offset Voltage 1 10 mV VOS Input Offset Voltage Temperature Coefficient 4 IB Input Bias Current MIC911 Condition Min 1.5 2 µV/°C 4 8 µA µA June 2000 MIC911 Micrel Symbol Parameter IOS Input Offset Current Condition Min Typ Max Units 0.03 2 3 µA µA +7.5 V VCM Input Common-Mode Range CMRR > 60dB –7.5 CMRR Common-Mode Rejection Ratio –7V < VCM < 7V 80 112 dB AVOL Large-Signal Voltage Gain RL = 2kΩ, VOUT = ±6V 65 80 dB VOUT Maximum Output Voltage Swing positive, RL = 2kΩ +7.2 +6.8 +7.4 V V negative, RL = 2kΩ –7.4 –7.2 –6.8 V V GBW Unity Gain-Bandwidth Product RL = 1kΩ 105 MHz BW –3dB Bandwidth AV = 2, RL = 470Ω 80 MHz SR Slew Rate 120 V/µs IGND Short-Circuit Output Current source 80 mA sink 22 mA Supply Current IGND 1.35 1.9 2.4 mA mA Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is likely to change). Note 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Note 5. Output swing limited by the maximum output sink capability, refer to the short-circuit current vs. temperature graph in “Typical Characteristics.” June 2000 3 MIC911 MIC911 Micrel Test Circuits VCC 10µF VCC 0.1µF 50Ω R2 BNC 5k Input 10µF 0.1µF 10k 10k 10k 2k 4 BNC MIC911 BNC 1 R1 5k Input 2 R7c 2k R7b 200Ω Output 3 5 2 0.1µF MIC911 1 BNC Output 3 5 R7a 100Ω 50Ω BNC 4 0.1µF R6 0.1µF 5k R3 200k Input 50Ω All resistors: 1% metal film PSRR vs. Frequency 100pF 10pF R3 27k S1 S2 R5 20Ω R4 250Ω R2 R2 + R 5 + R4 VOUT = VERROR 1 + + R1 R7 10µF VEE R1 20Ω 10µF VEE All resistors 1% 0.1µF R5 5k CMRR vs. Frequency VCC R2 4k 4 10µF 0.1µF 2 MIC911 1 3 5 BNC To Dynamic Analyzer 0.1µF R4 27k 10pF 10µF VEE Noise Measurement MIC911 4 June 2000 MIC911 Micrel Electrical Characteristics Supply Current vs. Temperature Supply Current vs. Supply Voltage SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) +85°C +25°C -40°C 1.0 0.5 2 3 4 5 6 7 8 9 SUPPLY VOLTAGE (±V) 0.0 1.8 VSUPPLY = ±9V 1.6 1.4 VSUPPLY = ±5V 1.2 OFFSET VOLTAGE (mV) 2.0 2.0 1.5 Offset Voltage vs. Temperature -1.0 VSUPPLY = ±9V -1.5 1.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) 10 Bias Current vs. Temperature -2.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Offset Voltage vs. Common-Mode Voltage 2.5 VSUPPLY = ±5V -0.5 Offset Voltage vs. Common-Mode Voltage -0.25 -0.5 2 VSUPPLY = ±9V 1 VSUPPLY = ±5V 0.5 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) +25°C -0.75 -40°C -1.00 SOURCING CURRENT 65 60 VSUPPLY = ±5V -15 SINKING CURRENT -25 VSUPPLY = ±9V OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) -40°C -20 +25°C +85°C SINKING CURRENT 3 4 5 6 7 8 9 SUPPLY VOLTAGE (±V) +25°C 60 10 3.5 VSUPPLY = ±5V -40°C 2.0 1.5 +25°C 1.0 0.5 0 0 -40°C SOURCING CURRENT 3 4 5 6 7 8 9 SUPPLY VOLTAGE (±V) 10 Output Voltage vs. Output Current 0.0 +85°C 3.0 2.5 +85°C 40 20 2 4.0 -15 80 Output Voltage vs. Output Current -10 June 2000 VSUPPLY = ±5V -20 Short-Circuit Current vs. Supply Voltage -30 2 100 -30 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) 55 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) -25 Short-Circuit Current vs. Supply Voltage OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) VSUPPLY = ±9V 80 70 -1.5 -8 -6 -4 -2 0 2 4 6 8 COMMON-MODE VOLTAGE (V) -10 90 +25°C -40°C Short-Circuit Current vs. Temperature 95 75 +85°C -1.0 -1.25 -5 -4 -3 -2 -1 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V) Short-Circuit Current vs. Temperature 85 +85°C SOURCING CURRENT 20 40 60 80 OUTPUT CURRENT (mA) 5 OUTPUT VOLTAGE (V) 1.5 -0.50 VSUPPLY = ±9V OFFSET VOLTGE (mV) OFFSET VOLTGE (mV) BIAS CURRENT (µA) VSUPPLY = ±5V SINKING CURRENT -0.5 -1.0 +25°C -40°C -1.5 -2.0 -2.5 +85°C -3.0 -3.5 -4.0 -25 VSUPPLY = ±5V -20 -15 -10 -5 OUTPUT CURRENT (mA) 0 MIC911 MIC911 Micrel 0 0 36 34 32 200 400 600 800 1000 CAPACITIVE LOAD (pF) 150 120 44 100 42 100 40 Gain Bandwidth 75 38 60 VSUPPLY = ±5V 40 36 25 34 20 32 10 0 3 4 5 6 7 8 9 SUPPLY VOLTAGE (±V) PHASE MARGIN (°) 80 50 0 2 32 200 400 600 800 1000 CAPACITIVE LOAD (pF) Common-Mode Rejection Ratio 46 125 34 1x107 Gain Bandwidth 25 Phase Margin 36 Gain Bandwidth 25 1x106 38 50 50 0 0 0 38 1x105 40 75 -20 -10 OUTPUT CURRENT (mA) 40 Phase Margin 75 1x102 Phase Margin VSUPPLY = ±9V 42 100 CMRR (dB) 42 100 -8 175 44 GAIN BANDWIDTH (MHz) 125 -6 44 125 Gain Bandwidth and Phase Margin vs. Supply Voltage 46 VSUPPLY = ±9V 150 +85°C -10 -30 PHASE MARGIN (°) 175 -4 150 1x104 4 3 -40°C 2 SOURCING 1 CURRENT 0 0 20 40 60 80 100 OUTPUT CURRENT (mA) -40°C 46 VSUPPLY = ±5V 1x103 +25°C -2 SINKING CURRENT PHASE MARGIN (°) +85°C +25°C GAIN BANDWIDTH (MHz) VSUPPLY = ±9V OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 175 0 10 9 8 7 6 5 Gain Bandwidth and Phase Margin vs. Load GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs. Load Output Voltage vs. Output Current Output Voltage vs. Output Current FREQUENCY (Hz) Positive Power Supply Rejection Ratio 100 100 80 80 40 FREQUENCY (Hz) FREQUENCY (Hz) Positive Power Supply Rejection Ratio Negative Power Supply Rejection Ratio Closed-Loop Frequency Response 80 FREQUENCY (Hz) 1x107 2 1x107 1x106 0 1x105 0 1x104 20 1x103 20 1x106 VSUPPLY = ±9V 1x105 VSUPPLY = ±9V 40 1x104 40 60 1x103 60 1x10 –PSRR (dB) 80 GAIN (dB) FREQUENCY (Hz) 10 8 6 4 2 0 -2 -4 -6 -8 -10 1 GAIN PHASE 180 135 90 ±9V 45 0 -45 -90 -135 -180 ±5V -225 -270 10 100 200 FREQUENCY (MHz) ±2.5V PHASE (°) 1x107 1x106 1x105 1x104 1x102 1x10 1x107 0 1x106 0 1x103 VSUPPLY = ±5V 20 100 1x10 60 20 2 1x107 1x106 1x105 1x104 1x103 VSUPPLY = ±5V 100 2 +PSRR (dB) 1x10 2 0 40 1x105 40 60 1x104 VSUPPLY = ±9V 60 1x103 80 –PSRR (dB) 100 20 MIC911 Negative Power Supply Rejection Ratio 120 +PSRR (dB) CMRR (dB) Common-Mode Rejection Ratio FREQUENCY (Hz) 6 June 2000 MIC911 Micrel 50pF 0pF 1000pF 470pF 200pF 10 100 200 FREQUENCY (MHz) -10 -20 -30 -40 -50 1 -10 -45 No Load -20 -90 -30 -135 -40 VSUPPLY = ±9V -180 -50 -225 1 10 100 200 FREQUENCY (MHz) 10 8 6 4 2 0 1000pF 470pF 200pF 10 100 200 FREQUENCY (MHz) Closed-Loop Frequency Response 100pF 500pF 200pF 1000pF 50pF 0pF 10 8 6 4 2 0 -2 -4 VSUPPLY = ±9V -6 AV = 1 -8 -10 1 10 100 200 FREQUENCY (MHz) 100 -2 -4 VSUPPLY = ±5V -6 AV = 1 -8 -10 1 10 100 200 FREQUENCY (MHz) 100 75 VCC = ±5V 50 25 0 0 Closed-Loop Frequency Response Test Circuit 75 25 0 0 200 400 600 800 1000 LOAD CAPACITANCE (pF) 10µF 150 CL RF 100 50 0 0 50Ω SLEW RATE (V/µs) FET probe SLEW RATE (V/µs) VCC = ±9V MIC911 200 400 600 800 1000 LOAD CAPACITANCE (pF) Negative Slew Rate 150 0.1µF VCC = ±5V 50 Positive Slew Rate VCC 100pF 500pF 200pF 1000pF 50pF 0pF Negative Slew Rate SLEW RATE (V/µs) 100pF 500pF 200pF 50pF 1000pF 0pF RL = 100Ω 225 180 135 90 45 0 -10 -45 No Load -20 -90 -30 -135 -40 VSUPPLY = ±5V -180 -50 -225 1 10 100 200 FREQUENCY (MHz) Positive Slew Rate SLEW RATE (V/µs) GAIN (dB) 0pF -2 -4 -6 V SUPPLY = ±2.5V -8 A = 1 V -10 1 10 100 200 FREQUENCY (MHz) Closed-Loop Frequency Response 10 8 6 4 2 0 100pF GAIN (dB) 225 180 135 90 45 0 RL = 100Ω GAIN (dB) 50 40 30 20 10 0 50pF Closed-Loop Frequency Response PHASE (°) GAIN (dB) Open-Loop Frequency Response VSUPPLY = ±9V 50 40 30 20 10 0 PHASE (°) 100pF 50 40 30 20 10 0 GAIN (dB) VSUPPLY = ±5V -10 -20 -30 -40 -50 1 Open-Loop Frequency Response Open-Loop Frequency Response vs. Capacitive Load GAIN (dB) GAIN (dB) Open-Loop Frequency Response vs. Capacitive Load 50 40 30 20 10 0 200 400 600 800 1000 LOAD CAPACITANCE (pF) VCC = ±9V 100 50 0 0 200 400 600 800 1000 LOAD CAPACITANCE (pF) 10µF VEE June 2000 7 MIC911 MIC911 Micrel Voltage Noise Current Noise 7 2 1x105 1 1x101 FREQUENCY (Hz) MIC911 3 0 1x105 1x104 1x101 0 1x103 50 4 1x104 100 5 1x103 150 6 1x102 NOISE CURRENT pA Hz 200 1x102 NOISE VOLTAGE nV Hz 250 FREQUENCY (Hz) 8 June 2000 MIC911 Micrel Small-Signal Pulse Response Small-Signal Pulse Response INPUT Small-Signal Pulse Response Small-Signal Pulse Response INPUT VCC = ±9V AV = 1 CL = 1.7pF RL = 10MΩ OUTPUT OUTPUT INPUT VCC = ±5V AV = 1 CL = 1000pF Small-Signal Pulse Response Small-Signal Pulse Response June 2000 VCC = ±9V AV = 1 CL = 1000pF RL = 10MΩ OUTPUT INPUT VCC = ±9V AV = 1 CL = 100pF RL = 10MΩ OUTPUT INPUT VCC = ±5V AV = 1 CL = 100pF RL = 10MΩ OUTPUT OUTPUT INPUT VCC = ±5V AV = 1 CL = 1.7pF RL = 10MΩ 9 MIC911 MIC911 Micrel Large-Signal Pulse Response Large-Signal Pulse Response VCC = ±5V AV = 1 CL = 100pF RL = 10MΩ OUTPUT OUTPUT VCC = ±5V AV = 1 CL = 1.7pF RL = 10MΩ ∆V = 5.44V ∆t = 42ns Large-Signal Pulse Response ∆V = 5.52V ∆t = 46ns Large-Signal Pulse Response VCC = ±9V AV = 1 CL = 1.7pF RL = 10MΩ OUTPUT OUTPUT VCC = ±5V AV = 1 CL = 1000pF RL = 10MΩ ∆V = 5.32V ∆t = 100ns Large-Signal Pulse Response ∆V = 5.52V ∆t = 34ns Large-Signal Pulse Response MIC911 VCC = ±9V AV = 1 CL = 1000pF RL = 10MΩ OUTPUT OUTPUT VCC = ±9V AV = 1 CL = 100pF RL = 10MΩ ∆V = 5.24V ∆t = 36ns 10 ∆V = 5.56V ∆t = 84ns June 2000 MIC911 Micrel 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 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 resistance). Surface-mount ceramic capacitors are ideal. Thermal Considerations The SOT-23-5 package, like all small packages, has a high thermal resistance. 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. A MIC911 with no load, dissipates power equal to the quiescent supply current * supply voltage Applications Information The MIC911 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 MIC911 is stable when driving any capacitance (see “Typical Characteristics: Gain Bandwidth and Phase Margin vs. Load Capacitance”) making it ideal for driving long coaxial cables or other high-capacitance loads. 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 “Typical Characteristics: Gain Bandwidth and Phase Margin vs. Load”). 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. Feedback Resistor Selection Conventional op amp gain configurations and resistor selection apply, the MIC911 is NOT a current feedback device. Resistor values in the range of 1k to 10k are recommended. Layout Considerations All high speed devices require careful PCB layout. The high stability and high PSRR of the MIC911 make this op amp easier to use than most, but the following guidelines should be observed: 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. It is important to ensure adequate supply bypassing capacitors are located close to the device. June 2000 ( ) PD(no load) = VV + − VV − IS 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. ( ) PD(output stage) = VV + − VOUT IOUT Total Power Dissipation = PD(no load) + PD(output stage) Ensure the total power dissipated in the device is no greater than the thermal capacity of the package. The SOT23-5 package has a thermal resistance of 260°C/W. Max . Allowable Power Dissipation = 11 TJ (max) − TA(max) 260W MIC911 MIC911 Micrel Package Information 1.90 (0.075) REF 0.95 (0.037) REF 1.75 (0.069) 1.50 (0.059) 3.00 (0.118) 2.60 (0.102) DIMENSIONS: MM (INCH) 1.30 (0.051) 0.90 (0.035) 3.02 (0.119) 2.80 (0.110) 0.20 (0.008) 0.09 (0.004) 10° 0° 0.15 (0.006) 0.00 (0.000) 0.50 (0.020) 0.35 (0.014) 0.60 (0.024) 0.10 (0.004) SOT-23-5 (M5) MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2000 Micrel Incorporated MIC911 12 June 2000