Datenblatt-Suchmaschine für elektronische Bauteile |
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ML13155 Datenblatt(PDF) 3 Page - LANSDALE Semiconductor Inc. |
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ML13155 Datenblatt(HTML) 3 Page - LANSDALE Semiconductor Inc. |
3 / 16 page www.lansdale.com Page 3 of 16 Issue A ML13155 LANSDALE Semiconductor, Inc. The ML13155 consists of a wideband three–stage limiting amplifier, a wideband quadrature detector which may be operated up to 200 MHz, and a received signal strength indicator (RSSI) circuit which provides a current output lin- early proportional to the IF input signal level for approxi- mately 35 dB range of input level. + 10µ Figure 2. Test Circuit Limiter 2 Output Limiter 1 Output Video Output Vin 330 1.0n 49.9 1.0n 27 1.0k 100n 330 L1 – Coilcraft part number 146–09J08S L1 260n 20p 499 VEE VEE VEE + 10n 1.0n 1.0n 1.0n 1.0n 100n 1.0n IN2 DEC2 VEE1 RSSI Buffer RSSI VEE2 LIMO2 QUAD2 QUAD1 LIMO1 VCC2 DETO2 DETO1 VCC1 DEC1 IN1 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 10µ EVALUATION PC BOARD The evaluation PCB shown in Figures 19 and 20 is very ver- satile and is designed to cascade two ICs. The center section of the board provides an area for attaching all surface mount components to the circuit side and radial leaded components to the component ground side of the PCB (see Figures 17 and 18). Additionally, the peripheral area surrounding the RF core provides pads to add supporting and interface circuitry as a particular application dictates. This evaluation board will be discussed and referenced in this section. LIMITING AMPLIFIER Differential input and output ports interfacing the three stage limiting amplifier provide a differential power gain of typical- ly 46 dB and useable frequency range of 300 MHz. The IF gain flatness may be controlled by decoupling of the internal feedback network at Pins 2 and 15. Scattering parameter (S–parameter) characterization of the IF as a two port linear amplifier is useful to implement maxi- mum stable power gain, input matching, and stability over a desired bandpass response and to ensure stable operation out- side the bandpass as well. The ML13155 is unconditionally stable over most of its useful operating frequency range; how- ever, it can be made unconditionally stable over its entire operating range with the proper decoupling of Pins 2 and 15. Relatively small decoupling capacitors of about 100 pF have a significant effect on the wideband response and stability. This is shown in the scattering parameter tables where S–parameters are shown for various values of C2 and C15 and at VEE of –3.0 and –5.0 V DC. APPLICATIONS INFORMATION CIRCUIT DESCRIPTION |
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Ähnliche Beschreibung - ML13155 |
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