Triple-band Vco For Gsm900/dcs1800/pcs1900 - National Semiconductor

The LMX2604 is a fully integrated VCO (Voltage-Controlled Oscillator) IC designed for GSM900/DCS1800/PCS1900 triple-band application. The IC is ideal for use in the trans- mitter modulation loop by providing extremely small form factor and low phase noise. The IC has two VCOs one for GSM and a second for DCS/PCS. The IC has two separate Buffer Amplifiers to drive an external high power Amplifier one for GSM900 band and the other one for DCS1800/ PCS1900 bands. The IC also has a differential Buffer ampli- fier to drive a mixer for the offset PLL The resonant circuits of the VCOs are fully integrated in the chip to ease the application of the IC. The high quality factor of the embedded tank circuit achieves very low phase noise characteristics at the VCO output. The only required external components are a couple of supply bypass capacitors and matching components. A control pin for controlling the oscillation frequency is shared by the two VCOs The LMX2604 IC is provided in a 20-pin 4x4 LLP (Leadless Leadframe package). By National Semiconductor Corporation
LMX2604 's PackagesLMX2604 's pdf datasheet

LMX2604 Pinout, Pinouts
LMX2604 pinout,Pin out
This is one package pinout of LMX2604,If you need more pinouts please download LMX2604's pdf datasheet.

LMX2604 Application circuits
LMX2604 circuits
This is one application circuit of LMX2604,If you need more circuits,please download LMX2604's pdf datasheet.

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