Electronic Components Datasheet Search |
|
MIC916 Datasheet(PDF) 11 Page - Micrel Semiconductor |
|
MIC916 Datasheet(HTML) 11 Page - Micrel Semiconductor |
11 / 12 page April 2005 11 M9999-042205 MIC916 Micrel, Inc. Applications Information The MIC916 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 MIC916 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 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 MIC916 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 MIC916 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 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. All 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 de- grade, in particular CMRR will reduce. A MIC916 with no load, dissipates power equal to the quies- cent supply current * supply voltage PV V I DV 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 I DV OUT OUT (output stage) = − () + Total Power Dissipation P P DD t =+ (no load) (outpu stage) Ensure the total power dissipated in the device is no greater than the thermal capacity of the package. The QSOP-16 package has a thermal resistance of 260°C/W. Max Allowable Power Dissipation TT W JA . = − (max) (max) TBD |
Similar Part No. - MIC916_05 |
|
Similar Description - MIC916_05 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |