Electronic Components Datasheet Search |
|
EL5235IS-T13 Datasheet(PDF) 11 Page - Intersil Corporation |
|
EL5235IS-T13 Datasheet(HTML) 11 Page - Intersil Corporation |
11 / 15 page 11 FN7383.4 May 4, 2007 transfer function contribute to even higher closed loop bandwidths. For example, the EL5134, EL5135, EL5234 and EL5235 have a -3dB bandwidth of 650MHz at a gain of 5, dropping to 150MHz at a gain of 10. It is important to note that the EL5134, EL5135, EL5234 and EL5235 is designed so that this “extra” bandwidth in low-gain application does not come at the expense of stability. As seen in the typical performance curves, the EL5134, EL5135, EL5234 and EL5235 in a gain of only 5 exhibited 0.2dB of peaking with a 500 Ω load. Output Drive Capability The EL5134, EL5135, EL5234 and EL5235 are designed to drive a low impedance load. They can easily drive 6VP-P signal into a 500 Ω load. This high output drive capability makes the EL5134, EL5135, EL5234 and EL5235 and ideal choice for RF, IF, and video applications. Furthermore, the EL5134, EL5135, EL5234 and EL5235 are current-limited at their outputs, allowing them to withstand momentary short to ground. However, the power dissipation with output-shorted cannot exceed the power dissipation capability of the package. Driving Cables and Capacitive Loads Although the EL5134, EL5135, EL5234 and EL5235 are designed to drive low impedance load, capacitive loads will decreases the amplifiers’ phase margin. As shown in the performance curves, capacitive load can result in peaking, overshoot and possible oscillation. For optimum AC performance, capacitive loads should be reduced as much as possible or isolated with a series resistor between 5 Ω to 20 Ω. When driving coaxial cables, double termination is always recommended for reflection-free performance. When properly terminated, the capacitance of the coaxial cable will not add to the capacitive load seen by the amplifier. Disable/Power-Down The EL5134 and EL5234 amplifiers can be disabled placing their outputs in a high impedance state. When disable, each amplifier current is reduced to 12uA. The EL5134 and EL5234 are disabled when their CE pins are pulled up to within 1V of the power suply. Similarly, the amplifiers are enabled by floating or pulling its CE pin to at least 3V below the positive supply. For +/-5V supply, this means that EL5134 and EL5234 amplifiers will be enabled when CE is 2V or less, and disabled when CE is above 4V. Although the logic levels are not stardard TTL, this choice of logic voltages allows the EL5134 and EL5234 to be enabled by typing CE to ground, even in 5V single supply applications. The CE pin can be driveing from CMOS outputs. Supply Voltage Range and Single-Supply Operation The EL5134, EL5135, EL5234 and EL5235 have been designed to operate with supply voltages having a span of greater than 5V and less than 12V. In practical terms, this means that they will operate on dual supplies ranging from ±2.5V to ±6V. With single-supply, the EL5134, EL5135, EL5234 and EL5235 will operate from 5V to 12V. To prevent internal circuit latch-up, the slew rate between the negative and positve supplies must be less than 1V/nS. As supply voltages continue to decrease, it becomes necessary to provide input and output voltage ranges that can get as close as possible to the supply voltages. The EL5134, EL5135, EL5234 and EL5235 have an input range which extends to within 2V of either supply. So, for example, on ±5V supplies, the EL5134, EL5135, EL5234 and EL5235 have an input range which spans ±3V. The output range of the EL5134, EL5135, EL5234 and EL5235 is also quite large, extending to within 2V of the supply rail. On a ±5V supply, the output is therefore capable of swinging from -3.1V to +3.1V. Single-supply output range is larger because of the increased negative swing due to the external pull- down resistor to ground. Power Dissipation With the wide power supply range and large output drive capability of the EL5134, EL5135, EL5234 and EL5235, it is possible to exceed the 150°C maximum junction temperatures under certain load and power-supply conditions. It is therefore important to calculate the maximum junction temperature (TJMAX) for all applications to determine if power supply voltages, load conditions, or package type need to be modified for the EL5134, EL5135, EL5234 and EL5235 to remain in the safe operating area. These parameters are related as follows: where: •PDMAXTOTAL is the sum of the maximum power dissipation of each amplifier in the package (PDMAX) •PDMAX for each amplifier can be calculated as follows: where: •TMAX = Maximum ambient temperature • θJA = Thermal resistance of the package •PDMAX = Maximum power dissipation of 1 amplifier •VS = Supply voltage •IMAX = Maximum supply current of 1 amplifier •VOUTMAX = Maximum output voltage swing of the application •RL = Load resistance Power Supply Bypassing And Printed Circuit Board Layout As with any high frequency devices, good printed circuit board layout is essential for optimum performance. Ground T JMAX T MAX θ JAxPDMAXTOTAL () + = PD MAX 2*V S I SMAX V S ( - V OUTMAX ) V OUTMAX R L ---------------------------- × + × = EL5134, EL5135, EL5234, EL5235 |
Similar Part No. - EL5235IS-T13 |
|
Similar Description - EL5235IS-T13 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |