MIC920

MIC920 MICREL | Alldatasheet

Document overview

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Technical content

Features

• 80MHz gain bandwidth product
• 115MHz –3dB bandwidth
• 550µA supply current
• SC-70 or SOT-23-5 packages
• 3000V/µs slew rate
• Drives any capacitive load
• Unity gain stable

Applications

• Video
• Imaging
• Ultrasound
• Portable equipment
• Line drivers

Ordering Information

Junction Temp. Range Package MIC920BM5 –40°C to +85°C SOT-23-5* MIC920BC5 –40°C to +85°C SC-70 * Contact factory for availabilty of SOT-23-5 package. Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com Pin Description Pin Number Pin Name Pin Function IN+ Noninverting Input Negative Supply (Input) IN– Inverting Input OUT Output: Amplifier Output Positive Supply (Input) Pin Configuration IN+ OUT IN– A37 Part Identification SOT-23-5 or SC-70 Functional Pinout IN+ OUT IN– SOT-23-5 or SC-70

Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Electrical Characteristics (±5V) V+ = +5V, V– = –5V, VCM = 0V, RL = 10MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted. Symbol Parameter Condition Min Typ Max Units VOS Input Offset Voltage 0.43 mV VOS VOS Temperature Coefficient µV/°C IB Input Bias Current 0.26 0.6 µA IOS Input Offset Current 0.04 0.3 µA VCM Input Common-Mode Range CMRR > 72dB –3.25 +3.25 V CMRR Common-Mode Rejection Ratio –2.5V < VCM < +2.5V dB PSRR Power Supply Rejection Ratio ±3.5V < VS < ±9V 104 dB AVOL Large-Signal Voltage Gain RL = 2k, VOUT = ±2V dB RL = 100Ω, VOUT = ±1V dB VOUT Maximum Output Voltage Swing positive, RL = 2kΩ +3.0 3.6 V negative, RL = 2kΩ –3.6 –3.0 V positive, RL = 200Ω +1.5 3.0 V negative, RL = 200Ω, Note 5 –2.5 –1.0 V GBW Unity Gain-Bandwidth Product CL = 1.7pF MHz PM Phase Margin BW –3dB Bandwidth Av = 1, RL = 1kΩ, CL = 1.7pF 100 MHz SR Slew Rate C=1.7pF, Gain=1, VOUT=5V, peak to peak, 1350 V/µs positive SR = 1190V/µs ISC Short-Circuit Output Current source mA sink mA IS Supply Current No Load 0.55 0.80 mA Input Voltage Noise f = 10kHz nV/√Hz Input Current Noise f = 10kHz 0.7 pA/√Hz

Electrical Characteristics

V+ = +9V, V– = –9V, VCM = 0V, RL = 10MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted Symbol Parameter Condition Min Typ Max Units VOS Input Offset Voltage 0.3 mV VOS Input Offset Voltage µV/°C Temperature Coefficient IB Input Bias Current 0.23 0.60 µA IOS Input Offset Current 0.04 0.3 µA VCM Input Common-Mode Range CMRR > 75dB –7.25 +7.25 V CMRR Common-Mode Rejection Ratio –6.5V < VCM < +6.5V dB PSRR Power Supply Rejection Ratio ±3.5V < VS < ±9V 104 dB

RL = 2k, VOUT = ±2V dB RL = 100Ω, VOUT = ±1V dB VOUT Maximum Output Voltage Swing positive, RL = 2kΩ 6.5 7.5 V negative, RL = 2kΩ –7.5 –6.2 V GBW Unity Gain-Bandwidth Product CL = 1.7pF MHz PM Phase Margin BW –3dB Bandwidth AV = 1, RL = 1kΩ, CL = 1.7pF 115 MHz SR Slew Rate C=1.7pF, Gain=1, VOUT=5V, peak to peak, 3000 V/µs negative SR = 2500V/µs ISC Short-Circuit Output Current source mA sink mA IS Supply Current No Load 0.55 0.8 mA Input Voltage Noise f = 10kHz nV/√Hz Input Current Noise f = 10kHz 0.8 pA/√Hz 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.”

0.1µF 0.1µF 0.1µF 10µF 50Ω 50Ω 50Ω 0.1µF 10µF All resistors: 1% metal film Output Input Input MIC920 BNC BNC BNC PSRR vs. Frequency R2 4k 0.1µF 10µF 0.1µF 10µF 10pF 10pF MIC920 BNC R4 27k R3 27k 20Ω 20Ω 100pF To Dynamic Analyzer Noise Measurement 0.1µF 10µF 0.1µF 10µF MIC920 BNC R7c 2k R7b 200Ω R7a 100Ω Input 200k 250Ω Output R1 5k BNC All resistors 1% V V R OUT ERROR CMRR vs. Frequency VIN MIC920 300Ω 50Ω VOUT FET Probe CL 0.1µF 10µF 0.1µF 10µF Closed Loop Frequency Response Measurement

0.9 0.95 1.05 1.1 1.15 1.2 1.25 -40 -20 80 100 OFFSET VOLTAGE (mV) TEMPERATURE (°C) Offset Voltage vs. Temperature V± = ±2.5V V± = ±5V V± = ±9V 0.30 0.35 0.40 0.45 0.50 0.55 0.60 -40 -20 80 100 SUPPLY CURRENT (mA) TEMPERATURE (°C) Supply Current vs. Temperature V± = ±2.5V V± = ±9V V± = ±5V 0.40 0.42 0.44 0.46 0.48 0.50 0.52 0.54 0.56 0.58 0.60 0.62 2.5 3.8 5.1 6.4 7.7 SUPPLY CURRENT (mA) SUPPLY VOLTAGE (V) Supply Current vs. Supply Voltage –40°C +85°C +25°C 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 2.2 -900 -540 -180 180 540 900 OFFSET VOLTAGE (mV) COMMON-MODE VOLTAGE (V) Offset Voltage vs. Common-Mode Voltage –40°C +85°C +25°C V± = ±2.5V 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 2.2 -3.40 -2.72 -2.04 -1.36 -0.68 0.68 1.36 2.04 2.72 3.40 OFFSET VOLTAGE (mV) COMMON-MODE VOLTAGE (V) Offset Voltage vs. Common-Mode Voltage –40°C +85°C +25°C V± = ±5V 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 2.2 -7.40 -5.92 -4.44 -2.96 -1.48 1.48 2.96 4.44 5.92 7.40 OFFSET VOLTAGE (mV) COMMON-MODE VOLTAGE (V) Offset Voltage vs. Common-Mode Voltage –40°C +85°C +25°C V± = ±9V 2.0 3.4 4.8 6.2 7.6 9.0 SHORT-CIRCUIT CURRENT (mA) SUPPLY VOLTAGE (V) Short-Circuit Current vs. Supply Voltage (Sourcing) –40°C 85°C 25°C 2.0 3.4 4.8 6.2 7.6 9.0 SHORT-CIRCUIT CURRENT (mA) SUPPLY VOLTAGE (V) Short-Circuit Current vs. Supply Voltage (Sinking) –40°C 85°C 25°C -16 -24 -32 -40 -48 -56 -64 -72 -80 OUTOUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current (Sourcing) –40°C 85°C 25°C V± = ±9V -10 OUTOUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current (Sinking) –40°C 85°C 25°C V± = ±9V -5.0 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.5 45.0 40.5 36.0 31.5 27.0 22.5 18.0 13.5 9.0 4.5 OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current (Sinking) 25°C 85°C –40°C V± = ±5V 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 -16 -24 -32 -40 -48 -56 -64 -72 -80 OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current (Sourcing) –40°C 85°C 25°C V± = ±5V

-50 -40 -30 -20 -10 1E+6 1E+7 1E+82E+8 CLOSED-LOOP GAIN (dB) FREQUENCY (Hz) Closed-Loop Gain vs. Frequency V± = ±9V Av = 1 10M 100M 1000pF 800pF 600pF 100pF 200pF 400pF 1.7pF -50 -40 -30 -20 -10 1E+6 10E+6 100E+6 200E+6 CLOSED-LOOP GAIN (dB) FREQUENCY (Hz) Closed-Loop Gain vs. Frequency V± = ±5V Av = 1 100M 10M 1000pF 800pF 600pF 400pF 200pF 100pF GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs. Supply Voltage 9 10 PHASE MARGIN (°) SUPPLY VOLTAGE (±V) Phase Margin Gain Bandwidth GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs. Load 200 400 600 800 1000 PHASE MARGIN (°) CAPACITIVE LOAD (pF) Phase Margin Gain Bandwidth V± = ±5V GAIN BANDWIDTH (MHz) Gain Bandwidth and Phase Margin vs. Load 200 400 600 800 1000 PHASE MARGIN (°) CAPACITIVE LOAD (pF) Phase Margin Gain Bandwidth V± = ±9V -25 -20 -15 -10 1E+6 10E+6 100E+6 200E+6 GAIN (dB) FREQUENCY (Hz) Closed-Loop Frequency Response Av = –1 R+ = RI = 475Ω ±9.0V ±2.5V ±5.0V 100M 10M -50 -40 -30 -20 -10 1x106 10x106 100x106 200x106 OPEN-LOOP GAIN (dB) FREQUENCY (Hz) Open-Loop Gain vs. Frequency V± = ±5V 100M 10M 1.7pF 50pF 121pF 471pF 200pF 1000pF -50 -40 -30 -20 -10 1x106 10x106 100x106 200x106 OPEN-LOOP GAIN (dB) FREQUENCY (Hz) Open-Loop Gain vs. Frequency V± = ±9V 100M 10M 1.7pF 50pF 121pF 471pF 200pF 1000pF -100 -80 -60 -40 -20 100 GAIN BANDWIDTH (dB) Open-Loop Frequency Response -225 -180 -135 -90 -45 135 180 225 PHASE MARGIN (°) CAPACITIVE LOAD (pF) Phase Gain V± = ±5V 100Ω 100Ω No Load 100k 10M 100M 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 -40 -20 80 100 BIAS CURRENT (µA) TEMPERATURE (°C) Bias Current vs. Temperature ±9V ±5V -25 -20 -15 -10 1E+6 10E+6 100E+6 200E+6 GAIN (dB) FREQUENCY (Hz) Closed-Loop Frequency Response Av = 2 RF = RI = 475Ω ±9.0V ±2.5V ±5.0V 100M 10M -100 -80 -60 -40 -20 100 GAIN BANDWIDTH (dB) Open-Loop Frequency Response -225 -180 -135 -90 -45 135 180 225 PHASE MARGIN (°) CAPACITIVE LOAD (pF) Phase Gain V± = ±9V 100Ω 100Ω No Load 100k 10M 100M

SLEW RATE (V/µs) LOAD CAPACITANCE (pF) Positive Slew Rate V± = ±9V 500 1000 1500 2000 2500 3000 200 400 600 800 1000 SLEW RATE (V/µs) LOAD CAPACITANCE (pF) Negative Slew Rate V± = ±9V 200 400 600 800 1000 1200 1400 200 400 600 800 1000 SLEW RATE (V/µs) LOAD CAPACITANCE (pF) Positive Slew Rate V± = ±5V 200 400 600 800 1000 1200 200 400 600 800 1000 SLEW RATE (V/µs) LOAD CAPACITANCE (pF) Negative Slew Rate V± = ±5V 100 100x100 1x103 10x103 100x103 1x106 10x106 CMRR (dB) FREQUENCY (Hz) Common-Mode Rejection Ratio V± = ±9V 100 10k 100k 10M 100 100x100 1x103 10x103 100x103 1x106 10x106 CMRR (dB) FREQUENCY (Hz) Common-Mode Rejection Ratio V± = ±5V 100 10k 100k 10M 100 120 PSRR (dB) FREQUENCY (kHz) Negative PSRR vs. Frequency V± = ±5V 0.1 100 10k 100 120 PSRR (dB) FREQUENCY (kHz) Negative PSRR vs. Frequency V± = ±9V 0.1 100 10k 100 120 PSRR (dB) FREQUENCY (kHz) Positive PSRR vs. Frequency V± = ±5V 0.1 100 10k 100 120 PSRR (dB) FREQUENCY (kHz) Positive PSRR vs. Frequency V± = ±9V 0.1 100 10k 100 1000 10000 100000 NOISE VOLTAGE (nV/Hz1/2) FREQUENCY (Hz) Voltage Noise Density vs. Frequency 0.5 1.0 1.5 2.0 2.5 100 1000 10000 100000 NOISE CURRENT (pA/Hz1/2) FREQUENCY (Hz) Current Noise Density vs. Frequency

TIME (100ns/div) VCC = ±9.0V CL = 1.7µF Av = 1.0V/V Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) TIME (100ns/div) VCC = ±5.0V CL = 1.7µF Av = 1.0V/V Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) TIME (100ns/div) VCC = ±9.0V CL = 100pF Av = +1 Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) TIME (100ns/div) VCC = ±5.0V CL = 100pF Av = +1V/V Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) Small Signal Response TIME (100ns/div) VCC = ±9.0V CL = 1000pF Av = +1V/V INPUT (50mV/div) OUTPUT (50mV/div) TIME (100ns/div) VCC = ±5.0V CL = 1000pF Av = +1V/V Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) Functional Characteristics

TIME (10ns/div) V± = ±5V CL = 1.7pF Av = 1 Positive SR = 1350V/µsec Negative SR = 1190V/sec OUTPUT (2V/div) Large Signal Reponse TIME (50ns/div) V± = ±5V CL = 100pF Av = 1 Positive SR = 373V/µsec Negative SR = 290V/sec OUTPUT (2V/div) Large Signal Response TIME (100ns/div) V± = ±5V CL = 1000pF Av = 1 Positive SR = 75V/µsec Negative SR = 41V/sec Output (2V/div) Large Signal Response TIME (10ns/div) V± = ±9V CL = 1.7pF Av = 1 Positive SR = 3000V/µsec Negative SR = 2500V/µsec OUTPUT (2V/div) Large Signal Response TIME (50ns/div) V± = ±9V CL = 100pF Av = 1 Positive SR = 672V/µsec Negative SR = 424V/sec OUTPUT (2V/div) Large Signal Response TIME (100ns/div) V± = ±9V CL = 1000pF Av = 1 Positive SR = 97V/µsec Negative SR = 60V/sec OUTPUT (2V/div)

The MIC920 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 MIC920 is stable when driving high capacitance, making it ideal for driving long coaxial cables or other high-capaci- tance 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 (<100Ω) in series with the output. Feedback Resistor Selection Conventional op amp gain configurations and resistor selec- tion apply, the MIC920 is NOT a current feedback device. Also, for minimum peaking, the feedback resistor should have low parasitic capacitance, usually 470Ω 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 capaci- tors are located close to the device. 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 perfor- mance 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 SC70-5 package and the SOT-23-5 package, like all small packages, have a high thermal resistance. It is impor- tant 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 par- ticular CMRR will reduce. An MIC920 with no load, dissipates power equal to the quiescent supply current × supply voltage P V V I D V V S (noload) = 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 V V I D V OUT OUT (output stage) = Total Power Dissipation P P D D t (noload) (outpu stage) Ensure the total power dissipated in the device is no greater than the thermal capacity of the package. The SC70-5 package has a thermal resistance of 450°C/W. Max AllowablePowerDissipation T T J A (max) (max)

450 C / W

Package Information

0.20 (0.008) 0.09 (0.004) 0.60 (0.024) 0.10 (0.004) 3.02 (0.119) 2.80 (0.110) 10° 3.00 (0.118) 2.60 (0.102) 1.75 (0.069) 1.50 (0.059) 0.95 (0.037) REF 1.30 (0.051) 0.90 (0.035) 0.15 (0.006) 0.00 (0.000) DIMENSIONS: MM (INCH) 0.50 (0.020) 0.35 (0.014) 1.90 (0.075) REF SOT-23-5 (M5) 0.30 (0.012) 0.10 (0.004) 2.20 (0.087) 1.80 (0.071) 2.40 (0.094) 1.80 (0.071) 1.35 (0.053) 1.15 (0.045) 0.65 (0.0256) BSC 1.00 (0.039) 0.80 (0.032) 0.10 (0.004) 0.00 (0.000) DIMENSIONS: MM (INCH) 0.30 (0.012) 0.15 (0.006) 0.18 (0.007) 0.10 (0.004) 1.10 (0.043) 0.80 (0.032) SC-70 (C5) 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. © 2001 Micrel Incorporated