Datasheet

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General Description

The MAX2750/MAX2751/MAX2752 are self-contained volt-

age-controlled oscillators (VCOs) intended for use in the

2.4GHz to 2.5GHz ISM band. Each IC combines a fully

integrated oscillator and output buffer in a miniature 8-pin

µMAX package.

The inductor and varactor elements of the tank are inte-

grated on-chip, greatly simplifying application of the part.

The only required external components are a couple of

supply bypass capacitors. The IC provides direct connec-

tion to the VCO tuning voltage input and the VCO buffer

output. The tuning voltage input range is +0.4V to +2.4V,

and the oscillator frequency tuning range is factory adjust-

ed to provide guaranteed limits. The output signal is

buffered by an amplifier stage (internally matched to 50Ω)

to provide higher output power and isolate the device from

load impedance variations.

The MAX2750/MAX2751/MAX2752 operate over a +2.7V

to +5.5V supply voltage range. Internal regulation of the

oscillator supply voltage eliminates the need for an exter-

nal LDO regulator for the VCO. The IC also provides a dig-

itally controlled shutdown mode to permit implementation

of sophisticated power-supply management. In shutdown,

the supply current is reduced to less than 1µA.

________________________Applications

802.11b DSSS WLAN

802.11 FHSS WLAN

Home RF

2.4GHz Bluetooth ISM Proprietary Radio

Features

♦ Guaranteed Frequency Tuning Range

MAX2750: 2400MHz to 2500MHz (Zero IF)

MAX2751: 2120MHz to 2260MHz

(240MHz to 280MHz IF)

MAX2752: 2025MHz to 2165MHz

(335MHz to 375MHz IF)

♦ On-Chip Tank Circuit

♦ Internally Matched Output Buffer Amplifier

♦ Low-Current Shutdown Mode

♦ +2.7V to +5.5V Supply Voltage Range

♦ Miniature 8-Pin µMAX Package

MAX2750/MAX2751/MAX2752

2.4GHz Monolithic

Voltage-Controlled Oscillators

OSCILLATOR

CORE

BIAS

TUNE

BYP

SHDN

GND

OUT

CC1

CC2

GND

SHDN

OUT TO MIXER/

SYNTHESIZER

MAX2750

MAX2751

MAX2752

Typical Operating Circuit

19-1825; Rev 1; 5/12

EVALUATION KIT

AVAILABLE

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX2750EUA+ -40°C to +85°C 8 μMAX

MAX2751EUA+ -40°C to +85°C 8 μMAX

MAX2752EUA+ -40°C to +85°C 8 μMAX

Pin Configuration appears at end of data sheet.

Denotes a lead(Pb)-free/RoHS-compliant package.

Devices are also available in a tape-and-reel packaging. Specify

tape and reel by adding “T” to the part number when ordering.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Summary of content (7 pages)

PAGE 1
9-1825; Rev 1; 5/12 KIT ATION EVALU LE B A IL A AV 2.4GHz Monolithic Voltage-Controlled Oscillators The MAX2750/MAX2751/MAX2752 are self-contained voltage-controlled oscillators (VCOs) intended for use in the 2.4GHz to 2.5GHz ISM band. Each IC combines a fully integrated oscillator and output buffer in a miniature 8-pin µMAX package. The inductor and varactor elements of the tank are integrated on-chip, greatly simplifying application of the part.
PAGE 2
MAX2750/MAX2751/MAX2752 2.4GHz Monolithic Voltage-Controlled Oscillators ABSOLUTE MAXIMUM RATINGS VCC to GND ..............................................................-0.3V to +6V TUNE, SHDN, BYP, OUT to GND ...............-0.3V to (VCC + 0.3V) Continuous Power Dissipation (TA = +70°C) µMAX (derate 4.8mW/°C above TA = +70°C)...........387.8mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................
PAGE 3
2.4GHz Monolithic Voltage-Controlled Oscillators (MAX2750/MAX2751/MAX2752 EV kit, VCC = +2.7V to +5.5V, VTUNE = +0.4V to +2.4V, V SHDN ≤ +2V, OUT = connected to 50Ω load, TA = +25°C. Typical values are at VCC = +3.0V, unless otherwise noted.) PARAMETER CONDITIONS Load Pulling VSWR = 2:1, all phases Supply Pushing VCC stepped: +3.3V to +2.8V Oscillator Turn-On Time (Note 3) Oscillator Turn-Off Time (Note 4) Note 1: Note 2: Note 3: Note 4: MIN TYP MAX UNITS 4 MHzp-p 1.
PAGE 4
Typical Operating Characteristics (continued) (Circuit of Figure 1, VCC = +3.0V, VTUNE = +0.4V to +2.4V, V SHDN ≤ 2V, TA = +25°C, unless otherwise noted.) -80 -90 -100 -110 -120 Δ MKR -30.00dB Δ = 30dBc OUTPUT POWER (dBm) -70 -2 MAX2750/51/52 toc08 -60 OUTPUT POWER (dBm) MAX2750/51/52 toc07 -50 -3 -4 MAX2750/51/52 toc09 NORMALIZED HARMONIC OUTPUT SPECTRUM MAX2751 OUTPUT POWER vs. TEMPERATURE PHASE NOISE PHASE NOISE (dBc/Hz) Δ = 48dBc -130 -140 -150 -5 0.
PAGE 5
2.4GHz Monolithic Voltage-Controlled Oscillators GND TUNE FROM SYNTHESIZER OSCILLATOR CORE OUT TO MIXER/ SYNTHESIZER OUT LOOP FILTER 220pF VCC1 GND VCC SHDN SHDN BIAS VCC2 220pF Figure 1. Typical Application Circuit Detailed Description Applications Information Oscillator Tune Input The MAX2750/MAX2751/MAX2752 VCOs are implemented as an LC oscillator topology, integrating all of the tank components on-chip.
PAGE 6
2.4GHz Monolithic Voltage-Controlled Oscillators MAX2750/MAX2751/MAX2752 Pin Configuration Chip Information PROCESS: BiPOLAR TOP VIEW BYP 1 TUNE 2 GND 3 MAX2750 MAX2751 MAX2752 SHDN 4 μMAX 6 8 GND 7 OUT 6 VCC2 5 VCC1 Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only.
PAGE 7
2.4GHz Monolithic Voltage-Controlled Oscillators REVISION NUMBER REVISION DATE 0 10/00 1 5/12 DESCRIPTION Initial release PAGES CHANGED — Added information for lead-free compliant options, added Absolute Maximum Ratings information, updated TOC 11 1, 2, 4 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.