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LMX2604

Features: On-chip Triple-band RF VCOsGSM: 880 MHz to 915 MHzDCS: 1710 MHz to 1785 MHzPCS: 1850 MHz to 1910 MHzOn-chip tank circuitLow phase noise- -167 dBc/Hz @ 20 MHz offset in GSM band- -163 dBc/Hz @ 20 MHz offset in DCS band- -162 dBc/Hz @ 20 MHz offset in PCS bandHigh output power- +6 dBm in G...

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SeekIC No. : 004397394 Detail

LMX2604: Features: On-chip Triple-band RF VCOsGSM: 880 MHz to 915 MHzDCS: 1710 MHz to 1785 MHzPCS: 1850 MHz to 1910 MHzOn-chip tank circuitLow phase noise- -167 dBc/Hz @ 20 MHz offset in GSM band- -163 dBc/H...

LMX2604 Data Sheet

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Part Number:
LMX2604
Supply Ability:
5000

Price Break

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

On-chip Triple-band RF VCOs
GSM: 880 MHz to 915 MHz
DCS: 1710 MHz to 1785 MHz
PCS: 1850 MHz to 1910 MHz
On-chip tank circuit
Low phase noise
- -167 dBc/Hz @ 20 MHz offset in GSM band
- -163 dBc/Hz @ 20 MHz offset in DCS band
- -162 dBc/Hz @ 20 MHz offset in PCS band
High output power
- +6 dBm in GSM mode
- +6 dBm in DCS and PCS mode
Low current consumption
- 18 mA in GSM mode
- 15 mA in DCS and PCS mode
+2.6 V to +3.0 V supply voltage
0.25 m RF CMOS process
Small 20-pin 4x4 LLP package


Application

Transmit VCO for GSM, DCS, and PCS
Closed loop modulation systems


Specifications

Parameter

Symbol

Ratings

Unit

Supply Voltage

VDD

-0.3 to 3.6

V

Input Voltage

VIN

-0.3 to V +0.3

V

Input Current (Note 2)

IIN

10

mA

Storage Temperature Range

TSTG

-65 to 150

°C




Description

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 characteristicsattheVCOoutput.Theonlyrequiredexternal 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).




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