MIC922

MIC922_06 MICREL | Alldatasheet

Document overview

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Technical content

Features

• 230MHz gain bandwidth product
• 400MHz –3dB bandwidth
• 2.5mA supply current
• SC-70 package
• 1500V/µs slew rate
• Drives any capacitive load
• Unity gain stable

Applications

• Video
• Imaging
• Ultrasound
• Portable equipment
• Line drivers Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-100 • http://www.micrel.com Pin Configuration IN+V– OUT IN– 4 5 A39 Part Identification SC-70 Pin Description Pin Number Pin Name Pin Function

1 IN+ Noninverting Input

2 V– Negative Supply (Input)

3 IN– Inverting Input

4 OUT Output: Amplifier Output

5 V+ Positive Supply (Input)

IN+V– OUT IN– 4 5 SC-70 Teeny is a trademark of Micrel, Inc.

Ordering Information

Ambient Temperature Package Standard Marking Pb-Free Marking MIC922BC5 A39 MIC922YC5 A39 –40ºC to +85ºC SC-70-5

MIC922 Micrel, Inc. MIC922 2 May 2006 Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Package Thermal Resistance 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 -5 0.8 5 mV VOS V OS Temperature Coefficient 15 µV/°C IB Input Bias Current 1.7 4.5 µA IOS Input Offset Current -2 0.3 2 µA VCM Input Common-Mode Range –3.25 +3.25 V CMRR Common-Mode Rejection Ratio –2.5V < V CM < +2.5V 75 80 dB PSRR Power Supply Rejection Ratio ±3.5V < V S < ±9V 68 87 dB AVOL Large-Signal Voltage Gain RL = 2kΩ, VOUT = ±2V 65 74 dB RL = 100Ω, VOUT = ±1V 77 dB VOUT Maximum Output Voltage Swing positive, R L = 2kΩ +3 3.6 V negative, RL = 2kΩ –3.6 –3 V positive, RL = 100Ω +2.7 3.0 V negative, RL = 100Ω, Note 5 –2.6 –2.3 V GBW Unity Gain-Bandwidth Product C L = 1.7pF 200 MHz PM Phase Margin CL = 1.7pF 49 ° BW –3dB Bandwidth Av = 1, CL = 1.7pF 320 MHz SR Slew Rate C=1.7pF, Gain=1, VOUT=4VPP 420 V/µs negative SR = 360V/µs ISC Short-Circuit Output Current source 65 78 mA sink 40 47 mA IS Supply Current No Load 2.5 3 mA Input Voltage Noise f = 10kHz 9 V/ √Hz Input Current Noise f = 10kHz 1.1 A/ √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 -5 0.4 5 mV VOS Input Offset Voltage 15 µV/°C Temperature Coefficient IB Input Bias Current 1.7 4.5 µA IOS Input Offset Current 0.3 2 µA VCM Input Common-Mode Range –7.25 +7.25 V CMRR Common-Mode Rejection Ratio –6.5V < V CM < +6.5V 58 83 dB PSRR Power Supply Rejection Ratio ±3.5V < V S < ±9V 68 87 dB

MIC922 Micrel, Inc. Symbol Parameter Condition Min Typ Max Units AVOL Large-Signal Voltage Gain RL = 2kΩ, VOUT = ±3V 65 76 dB RL = 100Ω, VOUT = ±1V 86 dB VOUT Maximum Output Voltage Swing positive, R L = 2kΩ 7 7.5 V negative, RL = 2kΩ –7.5 –7 V GBW Unity Gain-Bandwidth Product C L = 1.7pF 230 MHz PM Phase Margin CL = 1.7pF 44 ° BW –3dB Bandwidth AV = 1, CL = 1.7pF 400 MHz SR Slew Rate C=1.7pF, Av =1, VOUT=8VPP, 1500 V/µs positive SR = 750V/µs ISC Short-Circuit Output Current source 70 84 mA sink 40 50 mA IS Supply Current No Load 2.5 3 mA Input Voltage Noise f = 10kHz 9 nV/ √Hz Input Current Noise f = 10kHz 1.1 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 5. Output swing limited by the maximum output sink capability, refer to the short-circuit current vs. temperature graph in “Typical Characteristics.”

MIC922 Micrel, Inc. MIC922 4 May 2006 Test Circuits 2k10k 10k 10k 0.1µF 0.1µF 0.1µF 10µF 50Ω 50Ω 50Ω 0.1µF 10µFAll resistors: 1% metal film Output Input Input MIC922 4 BNC BNC BNC PSRR vs. Frequency R2 4k 0.1µF 10µF 0.1µF 10µF10pF 10pF MIC922 4 BNC R4 27k R3 27kR1 20Ω 20Ω 100pF To Dynamic Analyzer Noise Measurement 0.1µF 10µF 0.1µF 10µF MIC922 4 BNC R7c 2k R7b 200Ω R7a 100Ω Input 200k 250Ω Output R1 5kBNC All resistors 1% V V R2 R2 R R4 OUT ERROR= + + + +   1 5 CMRR vs. Frequency VIN MIC922 4 300Ω 50Ω VOUT FET Probe CL 0.1µF 10µF 0.1µF 10µF Closed Loop Frequency Response Measurement

MIC922 Micrel, Inc. Typical Characteristics 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 -40 -20 0 20 40 60 80 100 )Am(TNERRUCYLPPUS TEMPERATURE (°C) Supply Current vs. Temperature V± = ±9V V± = ±2.5V V± = ±5V 0.2 0.4 0.6 0.8 1.2 1.4 -40 -20 0 20 40 60 80 100 )Vm(EGATLOVTESFFO TEMPERATURE (°C) Offset Voltage vs. Temperature V± = ±2.5V V± = ±9V V± = ±5V 0.5 1.5 2.5 -40 -20 0 20 40 60 80 100 (TNERRUCSAIBTUPNI µ )A TEMPERATURE (°C) Bias Current vs. Temperature V± = ±5V V± = ±2.5V V± = ±9V -5 -4 -3 -2 -1 0 1 2 3 4 5 )Vm(EGATLOVTESFFO COMMON-MODE VOLTAGE (V) Offset Voltage vs. Common-Mode Voltage V± = ±5V –40°C 25°C 85°C 0.9- 2.7- 4.5- 6.3- 8.1- 8.1 6.3 4.5 2.7 0.9 )Vm(EGATLOVTESFFO COMMON-MODE VOLTAGE (V) Offset Voltage vs. Common-Mode Voltage 85°C 25°C –40°C V± = ±9V 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 10 20 30 40 50 60 70 80 )V(EGATLOVUTPTUO OUTPUT CURRENT (mA) Output Voltage vs. Output Current 25°C –40°C 85°C Sourcing V± = ±5V 0.9 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9 0 10 20 30 40 50 60 70 80 90 )V(EGATLOVTUPTUO OUTPUT CURRENT (mA) Output Voltage vs. Output Current –40°C +85°C +25°C Sourcing V± = ±9V -5.0 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.5 )V(EGATLOVTUPTUO OUTPUT CURRENT (mA) Output Voltage vs. Output Current –40°C 25°C Sinking V± = ±5V 85°C -60 -54 -48 -42 -36 -30 -24 -18 -12 0.2 7.2 4.3 1.4 8.4 5.5 2.6 9.6 6.7 3.8 0.9 )ZH/Vn(EGATLOVESION SUPPLY VOLTAGE (±V) Short Circuit Current vs. Supply Voltage Sinking 85°C 25°C –40°C 0.2 7.2 4.3 1.4 8.4 5.5 2.6 9.6 6.7 3.8 0.9 )Am(TNERRUCTIUCRIC-TROHS SUPPLY VOLTAGE (±V) Short-Circuit Current vs. Supply Voltage –40°C 85°C 25°C Sourcing -9.0 -8.1 -7.2 -6.3 -5.4 -4.5 -3.6 -2.7 -1.8 -0.9 0.0 0.9 )V(EGATLOVTUPTUO OUTPUT CURRENT (mA) Output Voltage vs. Output Current –40°C 85°C 25°C Sinking V± = ±9V 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 )Am(TNERRUCYLPPUS SUPPLY VOLTAGE (V) Supply Current vs. Supply Voltage –40°C 25°C 85°C

MIC922 Micrel, Inc. MIC922 6 May 2006 100 150 200 250 0 200 400 600 800 1000 )zHM(HTDIWDNABNIAG LOAD CAPACITANCE (pF) Gain Bandwidth and Phase Margin vs. Load V± = ±9V (NIGRAMESAHP °) Gain Bandwidth Phase Margin 100 150 200 250 300 350 400 0 200 400 600 800 1000 /V(ETARWELS µ )s LOAD CAPACITANCE (pF) Negative Slew Rate V± = ±5V -40 -30 -20 -10 60)zHM(HTDIWDNABNIAG Open-Loop Frequency Response -270 -225 -180 -135 -90 -45 135 180 (NIGRAMESAHP °) CAPACITIVE LOAD (pF) 10M RL = 100Ω RL = 100ΩPhase No Load Gain 1M 100M V± = ±5V -40 -30 -20 -10 60)zHM(HTDIWDNABNIAG Open-Loop Frequency Response -270 -225 -180 -135 -90 -45 135 180 (NIGRAMESAHP °) CAPACITIVE LOAD (pF) 10M RL = 100Ω RL = 100ΩPhase Margin No Load Gain Bandwidth 1M 100M V± = ±9V 200 400 600 800 1000 1200 1400 001 002 003 004 005 006 007 008 009 0001 /V(ETARWELS µ )s LOAD CAPACITANCE (pF) Negative Slew Rate V± = ±9V 100 150 200 250 0 200 400 600 800 1000 )zHM(HTDIWDNABNIAG LOAD CAPACITANCE (pF) Gain Bandwidth and Phase Margin vs. Load V± = ±5V (NIGRAMESAHP °) Gain Bandwidth Phase Margin 100 200 300 400 500 600 700 800 001 002 003 004 005 006 007 008 009 0001 /V(ETARWELSEVITISOP µ )s LOAD CAPACITANCE (pF) Positive Slew Rate V± = ±9V 150 160 170 180 190 200 210 220 230 240 0 1 2 3 4 5 6 7 8 9 10 )zHM(HTDIWDNABNIAG SUPPLY VOLTAGE (±V) Gain Bandwidth and Phase Margin vs. Supply Voltage Gain Bandwidth (NIGRAMESAHP °)Phase Margin 100 150 200 250 300 350 400 450 001 002 003 004 005 006 007 008 009 0001 /V(ETARWELS µ )s LOAD CAPACITANCE (pF) Positive Slew Rate V± = ±5V 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 5.2 0.3 5.3 0.4 5.4 0.5 5.5 0.6 5.6 0.7 5.7 0.8 5.8 0.9 (TNERRUCSAIB ± )V SUPPLY VOLTAGE (±V) Bias Current vs. Supply Voltage –40°C 85°C 25°C 100 1x106 10x106 100x106 500x106 )Bd(NIAGPOOL-DESOLC FREQUENCY (Hz) Closed Loop Gain vs. Frequency V± = ±5V 100M1M 10M 1.7pF 100pF 220pF 1000pF 800pF 600pF -70 -60 -50 -40 -30 -20 -10 1x106 10x106 100x106 500x106 )Bd(NIAGPOOL-DESOLC FREQUENCY (Hz) Closed-Loop Gain vs. Frequency V± = ±9V 1M 10M 100M 1.7pF 1000pF 800pF 600pF 400pF 220pF 100pF

MIC922 Micrel, Inc. -40 -30 -20 -10 60)Bd(NIAGPOOL-NEPO FREQUENCY (Hz) Open-Loop Gain vs. Frequency 100M10M1M 50pF 100pF 225pF 450pF 675pF 1000pF V± = ±5V 1.7pF -40 -30 -20 -10 60)Bd(NIAGPOOL-NEPO FREQUENCY (Hz) Open-Loop Gain vs. Frequency 100M10M1M 50pF 100pF 225pF 450pF 675pF 1000pF V± = ±9V 1.7pF

MIC922 Micrel, Inc. MIC922 8 May 2006 TIME (100ns/div) V± = ±5.0V Av = 1 CL = 1.7µF RL = 1MΩ Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) TIME (100ns/div) Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) V± = ±9.0V Av = 1 CL = 1.7µF RL = 1MΩ V± = ±5.0V Av = 1 CL = 100pF RL = 1MΩ TIME (100ns/div) Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) TIME (100ns/div) V± = ±9.0V Av = 1 CL = 100pF RL = 1MΩ Small Signal Response INPUT (50mV/div) OUTPUT (50mV/div) Small Signal Response TIME (100ns/div) INPUT (50mV/div) OUTPUT (50mV/div) V± = ±5.0V Av = 1 CL = 1000pF RL = 1MΩ Small Signal Response TIME (100ns/div) INPUT (50mV/div) OUTPUT (50mV/div) V± = ±9.0V Av = 1 CL = 1000pF RL = 1MΩ Functional Characteristics

MIC922 Micrel, Inc. TIME (25ns/div) V± = ±5.0V Av = 1 CL = 1.7µF RL = 1MΩ Positive Slew Rate = 418V/µs Negative Slew Rate = 356V/µs Large Signal Response OUTPUT (1V/div) TIME (25ns/div) Large Signal Response OUTPUT (1V/div) V± = ±5.0V Av = 1 CL = 100pF RL = 1MΩ Positive Slew Rate = 350V/µs Negative Slew Rate = 303V/µs Large Signal Response TIME (250ns/div) OUTPUT (2V/div) V± = ±5.0V Av = 1 CL = 1000pF RL = 1MΩ Positive Slew Rate = 106V/µs Negative Slew Rate = 66V/µs TIME (25ns/div) Large Signal Response OUTPUT (2V/div) V± = ±9.0V Av = 1 CL = 1.7µF RL = 1MΩ Positive Slew Rate = 747V/µs Negative Slew Rate = 1320V/µs TIME (25ns/div) Large Signal Response OUTPUT (2V/div) V± = ±9.0V Av = 1 CL = 100pF RL = 1MΩ Positive Slew Rate = 274V/µs Negative Slew Rate = 274V/µs TIME (250ns/div) Large Signal Response OUTPUT (1V/div) V± = ±9.0V Av = 1 CL = 1000pF RL = 1MΩ Positive Slew Rate = 78V/µs Negative Slew Rate = 51V/µs

MIC922 Micrel, Inc. MIC922 10 May 2006 Applications Information The MIC922 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 MIC922 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 add- ing a small resistor (<100Ω) in series with the output. Feedback Resistor/Capacitor Selection Conventional op amp gain configurations and resistor selec- tion apply, the MIC922 is NOT a current feedback device. Also, for minimum peaking, the feedback resistor should have low parasitic capacitance. To use the part as a follower, the output should be connected to input via a short wire. At high frequency, the parasitic capacitance at the input might cause peaking in the closed-loop frequency response. A 1pF capacitor should be used across the feedback resistor to compensate for this parasitic peaking. Layout Considerations All high speed devices require careful PCB layout. The follow- ing 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, 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 par-ticular CMRR will reduce. An MIC922 with no load, dissipates power equal to the qui- escent supply current × supply voltage P D(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+ – VVOUT)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 SC70-5 pack- age has a thermal resistance of 450°C/W. Max. Allowable Power Dissipation = 450°C/W TJ(max) – TA(max)

MIC922 Micrel, Inc.

Package Information

SC-70 (C5) 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 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. © 2002 Micrel, Inc.