MAX2754

1.2GHz VCO with Linear Modulation Input


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Description

The MAX2754 self-contained, linear modulation, voltage-controlled oscillator (VCO) is intended for use in the 2.4GHz to 2.5GHz ISM band, particularly for FSK modulation systems that utilize a direct frequency-modulation transmit architecture. This device features a linear modulation input in addition to the standard frequency tuning input. The frequency tuning range of 1145MHz to 1250MHz (1/2 LO) also supports an IF up to 110MHz with low side LO. The VCO is based on Maxim's proprietary monolithic VCO technology, where all VCO components are integrated on-chip, including the varactor and inductor.

The MAX2754 linear modulation input offers a means to directly FM modulate the VCO with a constant modulation sensitivity over the tuning voltage input range. Typical frequency deviation is -500kHz/V which is linear to ±4% over the guaranteed frequency limits. The tuning input voltage range is +0.4V to +2.4V and the oscillator frequency is factory adjusted to provide guaranteed limits. The oscillator signal is buffered by an output amplifier stage (internally matched to 50Ω) to provide higher output power and isolate the oscillator from load impedance variations.

The MAX2754 operates over a +2.7V to +5.5V supply range. This device also provides a digitally controlled shutdown mode to permit implementation of sophisticated power-supply management. In shutdown, the supply current is reduced to 0.2µA. Even when active, power consumption is a modest 41mW.

The MAX2754 is packaged in the miniature 8-pin µMAX® to offer the world's smallest, complete 2.4GHz direct-modulation VCO solution.
MAX2754: Typical Operating Circuit MAX2754: Typical Operating Circuit Enlarge+

Key Features

  • Fully Monolithic VCO Construction with On-Chip Inductor and Varactor Tuning Elements
  • Guaranteed 1145MHz to 1250MHz Tuning Range to Support 1/2 LO Applications
  • Modulation Linearity Within ±4%
  • Precise Modulation Gain (-500kHz/V)
  • Low Phase Noise (-137dBc/Hz at 4MHz offset)
  • +2.7V to +5.5V Single-Supply Operation
  • Low-Current Shutdown Mode
  • Miniature 8-Pin µMAX Package

Applications/Uses

  • 2.4GHz Cordless Phones
  • 2.4GHz Wireless Data Radios
  • Bluetooth®
  • HomeRF WLAN
Part NumberLO Driver OutputsPLL Driver OutputsRF Freq.
(MHz)
RF Freq.
(MHz)
POUT
(dBm)
POUT
(dBm)
VCC
(V)
ISUPPLY
(mA)
Footprint
(mm x mm)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX2754 NoYes11451250-5-52.7 to 5.513.73.0 x 4.9
UMAX/8
$3.19 @1k
See All VCOs (14)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX2754EVKIT: Evaluation Kit for the MAX2754

CAD Symbols and Footprints

  • MAX2754EUA+
  • MAX2754EUA+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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