MIC914 MICREL | Alldatasheet

Document overview

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Technical content

Features

  • 160MHz gain bandwidth product
  • 1.25mA supply current
  • SOT-23-5 package
  • 160V/ µs slew rate
  • drives any capacitive load
  • 112dB CMRR

Applications

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

Ordering Information

Part Number Junction Temp. Range Package MIC914BM5 –40 °C to +85°C SOT-23-5 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

1 OUT Output: Amplifier Output

2 V+ Positive Supply (Input)

3 IN+ Noninverting Input

4 IN– Inverting Input

5 V– Negative Supply (Input)

IN– IN+ A26 Part Identification SOT-23-5 Functional Pinout OUTV+ IN– IN+ SOT-23-5

Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) 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 Condition Min Typ Max Units VOS Input Offset Voltage 1 10 mV VOS Input Offset Voltage 4 µV/°C Temperature Coefficient IB Input Bias Current 1.5 4 µA 8 µA IOS Input Offset Current 2 µA 0.03 3 µA VCM Input Common-Mode Range CMRR > 60dB –3.5 +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 R L = 2k, VOUT = ±2V 65 78 dB RL = 200Ω, VOUT = ±1V 65 78 dB VOUT Maximum Output Voltage Swing positive, R L = 2kΩ +3.3 3.5 V +3.0 V negative, RL = 2kΩ –3.5 –3.3 V –3.0 V positive, RL = 200Ω +2.8 3.2 V +2.5 V negative, RL = 200Ω, Note 5 –2.5 –1.7 V –1.0 V negative, RL = 200Ω, 25°C ≤ TJ ≤ +85°C, –1.7 V Note 5 GBW Unity Gain-Bandwidth Product R L = 1kΩ 135 MHz BW –3dB Bandwidth A V = 2, RL = 470Ω 155 MHz SR Slew Rate 135 V/ µs IGND Short-Circuit Output Current source 65 mA sink 17 mA IGND Supply Current 1.25 1.8 mA 2.3 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 Condition Min Typ Max Units VOS Input Offset Voltage 1 10 mV VOS Input Offset Voltage 4 µV/°C Temperature Coefficient IB Input Bias Current 1.5 4 µA 8 µA

Symbol Parameter Condition Min Typ Max Units IOS Input Offset Current 2 µA 0.03 3 µA VCM Input Common-Mode Range CMRR > 60dB –7.5 +7.5 V CMRR Common-Mode Rejection Ratio –7V < VCM < 7V 80 112 dB AVOL Large-Signal Voltage Gain R L = 2kΩ, VOUT = ±6V 65 80 dB VOUT Maximum Output Voltage Swing positive, R L = 2kΩ +7.2 +7.4 V +6.8 V negative, RL = 2kΩ –7.4 –7.2 V –6.8 V GBW Gain-Bandwidth Product R L = 1kΩ 160 MHz BW –3dB Bandwidth A V = 2, RL = 470Ω 185 MHz SR Slew Rate 160 V/ µs IGND Short-Circuit Output Current source 80 mA sink 22 mA IGND Supply Current 1.35 1.9 mA 2.4 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 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 10µFAll resistors: 1% metal film Output Input Input VCC VEE MIC914 1 BNC BNC BNC PSRR vs. Frequency R2 4k 0.1µF 10µF 0.1µF 10µF10pF 10pF VCC VEE MIC914 1 BNC R4 27k R3 27kR1 20Ω 20Ω 100pF To Dynamic Analyzer Noise Measurement 0.1µF 10µF 0.1µF 10µF VCC VEE MIC914 1 BNC R7c 2k R7b 200Ω R7a 100Ω Input 200k 250Ω Output R1 5kBNC All resistors 1% VV R2 R2 R R4 OUT ERROR=+ + ++   1 5 CMRR vs. Frequency

1.0 1.2 1.4 1.6 1.8 2.0 -40 -20 0 20 40 60 80 100 SUPPLY CURRENT (mA) TEMPERATURE (°C) Supply Current vs. Temperature VSUPPLY = ±9V VSUPPLY = ±5V -2.0 -1.5 -1.0 -0.5 0.0 -40 -20 0 20 40 60 80 100 OFFSET VOLTAGE (mV) TEMPERATURE (°C) Offset Voltage vs. Temperature VSUPPLY = ±5V VSUPPLY = ±9V 0.5 1.5 2.5 -40 -20 0 20 40 60 80 100 BIAS CURRENT (µA) TEMPERATURE (°C) Bias Current vs. Temperature VSUPPLY = ±5V VSUPPLY = ±9V -40 -20 0 20 40 60 80 100OUTPUT CURRENT (mA) TEMPERATURE (°C) Short-Circuit Current vs. Temperature VSUPPLY = ±9V VSUPPLY = ±5V SOURCING CURRENT -30 -25 -20 -15 -10 -40 -20 0 20 40 60 80 100 OUTPUT CURRENT (mA) TEMPERATURE (°C) Short-Circuit Current vs. Temperature VSUPPLY = ±9V VSUPPLY = ±5V SINKING CURRENT 0.5 1.0 1.5 2.0 23456789 1 0 SUPPLY CURRENT (mA) SUPPLY VOLTAGE (±V) Supply Current vs. Supply Voltage +85°C +25°C -40°C -1.25 -1.00 -0.75 -0.50 -0.25 - 5 - 4 - 3 - 2 - 1 012345 OFFSET VOLTGE (mV) COMMON-MODE VOLTAGE (V) Offset Voltage vs. Common-Mode Voltage +85°C +25°C -40°C VSUPPLY = ±5V -1.5 -1.0 -0.5 -8 -6 -4 -2 0 2 4 6 8 OFFSET VOLTGE (mV) COMMON-MODE VOLTAGE (V) Offset Voltage vs. Common-Mode Voltage +85°C +25°C -40°C VSUPPLY = ±9V 100 23456789 1 0 OUTPUT CURRENT (mA) SUPPLY VOLTAGE (±V) Short-Circuit Current vs. Supply Voltage +85°C +25°C -40°C SOURCING CURRENT -30 -25 -20 -15 -10 23456789 1 0 OUTPUT CURRENT (mA) SUPPLY VOLTAGE (±V) Short-Circuit Current vs. Supply Voltage +85°C +25°C -40°C SINKING CURRENT 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 2 04 06 08 0 OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current +85°C +25°C -40°C SOURCING CURRENT VSUPPLY = ±5V -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 -25 -20 -15 -10 -5 0 OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current +85°C +25°C -40°C SINKING CURRENT VSUPPLY = ±5V

OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current +85°C +25°C -40°C SOURCING CURRENT VSUPPLY = ±9V -10 -30 -20 -10 0 OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current +85°C +25°C -40°C SINKING CURRENT VSUPPLY = ±9V 100 125 150 0 200 400 600 800 1000 GAIN BANDWIDTH (MHz) PHASE MARGIN (°) CAPACITIVE LOAD (pF) Gain Bandwidth and Phase Margin vs. Capacitive Load VSUPPLY = ±5V Gain Bandwidth Phase Margin 100 125 150 175 0 200 400 600 800 1000 GAIN BANDWIDTH (MHz) PHASE MARGIN (°) CAPACITIVE LOAD (pF) Gain Bandwidth and Phase Margin vs. Capacitive Load VSUPPLY = ±9V Gain Bandwidth Phase Margin 100 1x102 1x103 1x104 1x105 1x106 1x107 –PSRR (dB) FREQUENCY (Hz) Negative Power Supply Rejection Ratio VSUPPLY = ±5V 100 125 150 175 23456789 1 0 GAIN BANDWIDTH (MHz) PHASE MARGIN (°) SUPPLY VOLTAGE (±V) Gain Bandwidth and Phase Margin vs. Supply Voltage Gain Bandwidth Phase Margin 100 120 1x102 1x103 1x104 1x105 1x106 1x107 CMRR (dB) FREQUENCY (Hz) Common-Mode Rejection Ratio VSUPPLY = ±9V 100 1x102 1x103 1x104 1x105 1x106 1x107 +PSRR (dB) FREQUENCY (Hz) Positive Power Supply Rejection Ratio VSUPPLY = ±9V 100 120 1x102 1x103 1x104 1x105 1x106 1x107 CMRR (dB) FREQUENCY (Hz) Common-Mode Rejection Ratio VSUPPLY = ±5V 100 1x102 1x103 1x104 1x105 1x106 1x107 +PSRR (dB) FREQUENCY (Hz) Positive Power Supply Rejection Ratio VSUPPLY = ±5V 100 1x102 1x103 1x104 1x105 1x106 1x107 –PSRR (dB) FREQUENCY (Hz) Negative Power Supply Rejection Ratio VSUPPLY = ±9V -10 1 10 100 200 GAIN (dB) FREQUENCY (MHz) Closed-Loop Frequency Response 1000pF VSUPPLY = ±2.5V AV = 1 500pF 200pF 100pF 50pF 0pF

50Ω Closed-Loop Frequency Response Test Circuit 0.1µF 10µF 10µF VCC VEE 100 125 150 0 200 400 600 800 1000 SLEW RATE (V/µs) LOAD CAPACITANCE (pF) Positive Slew Rate VCC = ±5V 100 125 150 0 200 400 600 800 1000 SLEW RATE (V/µs) LOAD CAPACITANCE (pF) Negative Slew Rate VCC = ±5V 100 125 150 0 200 400 600 800 1000 SLEW RATE (V/µs) LOAD CAPACITANCE (pF) Positive Slew Rate VCC = ±9V 100 125 150 0 200 400 600 800 1000 SLEW RATE (V/µs) LOAD CAPACITANCE (pF) Negative Slew Rate VCC = ±9V -10 -270 -225 -180 -135 -90 -45 135 180 1 10 100 200 GAIN (dB) PHASE (°) FREQUENCY (MHz) Closed-Loop Frequency Response ±9V ±2.5V ±5V GAIN PHASE -10 1 10 100 200 GAIN (dB) FREQUENCY (MHz) Open-Loop Frequency Response vs. Capacitive Load 1000pF VSUPPLY = ±5V 470pF 200pF 100pF 50pF 0pF -10 1 10 100 200 GAIN (dB) FREQUENCY (MHz) Open-Loop Frequency Response vs. Capacitive Load 1000pF VSUPPLY = ±9V 470pF 200pF 100pF 50pF 0pF -50 -40 -30 -20 -10 -225 -180 -135 -90 -45 135 180 225 1 10 100 200 GAIN (dB) PHASE (°) FREQUENCY (MHz) Open-Loop Frequency Response VSUPPLY = ±5V RL = 100Ω No Load -50 -40 -30 -20 -10 -225 -180 -135 -90 -45 135 180 225 1 10 100 200 GAIN (dB) PHASE (°) FREQUENCY (MHz) Open-Loop Frequency Response VSUPPLY = ±9V RL = 100Ω No Load 100 150 200 250 1x101 1x102 1x103 1x104 1x105 FREQUENCY (Hz) Voltage Noise NOISE VOLTAGE nV Hz 1x101 1x102 1x103 1x104 1x105 FREQUENCY (Hz) Current Noise NOISE CURRENT pA Hz

VCC = ±5V AV = 1 CL = 1.7pF OUTPUT INPUT Small-Signal Pulse Response VCC = ±9V AV = 1 CL = 1.7pF OUTPUT INPUT Small-Signal Pulse Response VCC = ±5V AV = 1 CL = 100pF OUTPUT INPUT Small-Signal Pulse Response VCC = ±9V AV = 1 CL = 1000pF OUTPUT INPUT Small-Signal Pulse Response VCC = ±5V AV = 1 CL = 100pF OUTPUT INPUT Small-Signal Pulse Response VCC = ±9V AV = 1 CL = 1000pF OUTPUT INPUT

VCC = ±5V AV = –1 CL = 1.7pF RL = 470Ω OUTPUT ∆V = 5.28V ∆t = 50ns Large-Signal Pulse Response VCC = ±5V AV = –1 CL = 100pF RL = 470Ω OUTPUT ∆V = 5.52V ∆t = 56ns Large-Signal Pulse Response VCC = ±5V AV = –1 CL = 100pF RL = 470Ω OUTPUT ∆V = 5.24V ∆t = 115ns Large-Signal Pulse Response VCC = ±9V AV = –1 CL = 100pF RL = 470MΩ OUTPUT ∆V = 5.08V ∆t = 38ns Large-Signal Pulse Response VCC = ±9V AV = –1 CL = 1000pF RL = 470MΩ OUTPUT ∆V = 5.48V ∆t = 44ns Large-Signal Pulse Response VCC = ±9V AV = –1 CL = 1000pF RL = 470MΩ OUTPUT ∆V = 6.40V ∆t = 115ns

The MIC914 is a high-speed, voltage-feedback operational amplifier featuring very low supply current and excellent stability. This device is unity gain stable with R L ≤ 200Ω and capable of driving high capacitance loads. Stability Considerations The MIC914 is unity gain stable and it is capable of driving unlimited capacitance loads, but some design considerations are required to ensure stability. The output needs to be loaded with 200Ω resistance or less and/or have suffi- cient load capacitance to achieve stability (refer to the “Load Capacitance vs. Phase Margin” graph). For applications requiring a little less speed, Micrel offers the MIC911, a more heavily compensated version of the MIC914 which provides extremely stable operation for all load resis- tance and capacitance. For stability considerations at different supply voltages, please refer to the graph elsewhere in the datasheet entitled "Gain Bandwidth and Phase Margin vs. Supply Voltage". Driving High Capacitance The MIC914 is stable when driving high 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 Characteris- tics: Gain Bandwidth and Phase Margin vs. Load”). In applications where the load capaci- tance reduces the speed of the op amp to an unacceptable level, the effect of the load capaci- tance 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 MIC914 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 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. An MIC914 with no load, dissipates power equal to the quiescent supply current * supply voltage PV V IDV V S(no load) =−() +− 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. PV V IDV OUT OUT(output stage) =−() + Total Power Dissipation P PDD t=+ (no load) (outpu 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 AllowablePower Dissipation TTJA. = −(max) (max) 260W

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)

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