Maxim MAX2623EUA, MAX2622EUA Datasheet

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General Description

The MAX2622/MAX2623/MAX2624 self-contained volt­age-controlled oscillators (VCOs) combine an integrat­ed oscillator and output buffer in a miniature 8-pin
µMAX package.

The inductor and varactor elements of the tank circuits
are integrated on-chip, greatly simplifying application of
the part. In addition, the center frequency of oscillation
and frequency span are factory preset to provide a
guaranteed frequency range versus control voltage. An
external tuning voltage controls the oscillation frequency.
The output signals are buffered by an amplifier stage

(easily matched to 50Ω), using only capacitors to pro-

vide higher output power and isolate the devices from
load impedance variations.

The MAX2622/MAX2623/MAX2624 operate from a
+2.7V to +3.3V supply voltage and require only 9mA of
supply current. In shutdown mode, the supply current is
reduced to 0.1µA.

Applications

866MHz to 868MHz European ISM Band (MAX2622)

DECT 1/2 Frequency LO (MAX2623)

902MHz to 928MHz ISM Band, ±10.7MHz IF
(MAX2623)

902MHz to 928MHz ISM Band, 45MHz to 70MHz IF
(MAX2624)

Features

♦ Fully Monolithic
♦ Guaranteed Performance
♦ Wide Choice of Frequencies

855MHz to 881MHz (MAX2622)
885MHz to 950MHz (MAX2623)
947MHz to 998MHz (MAX2624)

♦ +2.7V to +3.3V Single-Supply Operation
♦ Low-Current Shutdown Mode
♦ Smaller than Modules (8-pin µMAX package)

MAX2622/MAX2623/MAX2624

Monolithic Voltage-Controlled Oscillators

________________________________________________________________

Maxim Integrated Products

1

19-1528; Rev 0; 8/99

PART
MAX2622EUA
MAX2623EUA
MAX2624EUA*

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

8 µMAX

8 µMAX

8 µMAX

EVALUATION KIT MANUAL

FOLLOWS DATA SHEET

Ordering Information

Typical Operating Circuit

Pin Configuration appears at end of data sheet

*

Future product—contact factory for availability.

N.C.

TUNE

SHDN

TUNE

GND

SHDN

OSCILLATOR

CORE

MAX2622
MAX2623
MAX2624

BIAS

GND

OUT

V

V

C

SERIES

C

SHUNT

CC

CC

100pF

100pF

OUT TO MIXER/
SYNTHESIZER

V

CC

0.1µF

MAX2622/MAX2623/MAX2624

Monolithic Voltage-Controlled Oscillators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(

Typical Operating Circuit

, VCC= +2.7V to +3.3V, V

TUNE

= 1.4V, V

SHDN

= 2V, OUT = unconnected, TA= -40°C to +85°C, unless

otherwise noted. Typical values are at V

CC

= +3V, TA= +25°C.) (Note 1)

AC ELECTRICAL CHARACTERISTICS

(

Typical Operating Circuit,

VCC= +2.7V to +3.3V, V

TUNE

= 0.4V to 2.4V, V

SHDN

= 2V, TA= +25°C, unless otherwise noted. Typical

values measured at V

CC

= +3V.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Note 1: Specifications are production tested at T

A

= +25°C. Limits over temperature are guaranteed by design and characterization.

Note 2: Maximum tuning gain is measured at V

TUNE

= 0.4V with a 0.2V step to 0.6V. This represents the worst-case (highest) tuning gain.

Note 3: Measurements taken on MAX262_ EV kit.
Note 4: Return loss is optimized across all frequencies via external shunt/series capacitor matching.

V

CC

to GND..............................................................-0.3V to +6V

TUNE, SHDN to GND .................................-0.3V to (V

CC

+ 0.3V)

OUT to GND ...............................................-0.3V to (V

CC

+ 0.6V)

Continuous Power Dissipation (TA= +70°C)

8-pin µMAX (derate 5.7mW/°C above TA = +70°C)...457mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10sec) .............................+300°C

V

SHDN

≤ 0.6V

0.4V ≤ V

TUNE

2.4V

VCC= 3.3V

VCC= 2.7V

V

SHDN

= 0.6V, VCC= 3.3V

V

SHDN

= 2.0V, VCC= 3.3V

CONDITIONS

µA

0.1 10

Shutdown Supply Current

mA

9 11.5

V

2.7 3.3

Supply Voltage

Supply Current

nA

0.2

TUNE Input Current

V

0.6

SHDN Input Voltage Low

V

2.0

SHDN Input Voltage High

µA

-0.5 0.5

SHDN Input Current Low

µA

-0.5 0.5

SHDN Input Current High

UNITSMIN TYP MAXPARAMETER

f

OFF

= 100kHz

f

OFF

= 1MHz

dBc/Hz

-101

Phase Noise

-119

V

CC

stepped from 2.8V to 3.3V

VSWR = 2:1, all phases

V

TUNE

= 0.4V (Note 3)

CONDITIONS

885 950

kHz/V

200

Supply Pushing

MHz

p-p

0.5

MAX2623, V

TUNE

= 0.4V to 2.4V, TA= -20°C to +75°C

Load Pulling

dBc

-30

Harmonics

dB

-12

Return Loss (Notes 3, 4)

dBm/Hz

-156

Noise Floor

dBm

-8

Output Power

UNITMIN TYP MAXPARAMETER

MAX2622, V

TUNE

= 0.4V to 2.4V, TA= -40°C to +85°C

Oscillator Frequency Range MHz

855 881

V

TUNE

= 0.4V to 2.4V MHz/V

80 110

Tuning Gain (Note 2)

MAX2624, V

TUNE

= 0.4V to 2.4V, TA = -40°C to +85°C

947 998