MAX2753EUA ,2.4GHz Monolithic Voltage-Controlled Oscillator with Differential OutputsFeaturesThe MAX2753 is a self-contained voltage-controlled oscil- Guaranteed Frequency Tuning Ran ..
MAX2754EUA ,1.2GHz VCO with Linear Modulation InputApplicationsHomeRF WLANVCCBluetoothVVREG CCREG AND BIAS2.4GHz Cordless Phones330nF330nF2.4GHz Wirel ..
MAX2754EUA ,1.2GHz VCO with Linear Modulation InputELECTRICAL CHARACTERISTICS(MAX2754 EV kit. V = +2.7V to +5.5V, V = +0.4V to +2.4V, V ≥ +2.0V, V = + ..
MAX275ACPP+ ,4th- and 8th-Order, Continuous-Time Active FiltersAth. and 8th-Order Continuous-Time
Active Filters
ABSOLUTE MAXIMUM RATINGS
V+ to V- ....r.tt ..
MAX275AEPP ,4th-order continuous-time active filterELECTRICAL CHARACTERISTICS (continued) -1.1. MAX274
(V+ I':::,?: 5V, V- 'CCC' -5V, test circuit ..
MAX275AEWP ,4th-order continuous-time active filterGeneral Description
The MAX274 and MAX275 are continuous-time active
filters consisting of inde ..
MAX604CSA-T ,5V/3.3V or Adjustable, Low-Dropout, Low-IQ, 500mA Linear RegulatorsGeneral Description ________
MAX604EPA ,3.3V or adjustable, low-dropout, low quiescent currrent, 500mA linear regulator.Features' 500mA Output Current, with Foldback CurrentThe MAX603/MAX604 low-dropout, low quiescent c ..
MAX604ESA ,5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear RegulatorsMAX603/MAX60419-0269; Rev 0; 9/945V/3.3V or Adjustable, Low-Dropout, Low I , 500mA Linear Regulator ..
MAX604ESA ,5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear RegulatorsELECTRICAL CHARACTERISTICS(V = 6V (MAX603) or 4.3V (MAX604), C = C = 10µF, OFF = V , SET = GND, T = ..
MAX604ESA+ ,5V/3.3V or Adjustable, Low-Dropout, Low-IQ, 500mA Linear RegulatorsELECTRICAL CHARACTERISTICS(V = 6V (MAX603) or 4.3V (MAX604), C = C = 10µF, OFF = V , SET = GND, T = ..
MAX604ESA+T ,5V/3.3V or Adjustable, Low-Dropout, Low-IQ, 500mA Linear RegulatorsFeatures' 500mA Output Current, with Foldback CurrentThe MAX603/MAX604 low-dropout, low quiescent c ..
MAX2753EUA
2.4GHz Monolithic Voltage-Controlled Oscillator with Differential Outputs
General DescriptionThe MAX2753 is a self-contained voltage-controlled oscil-
lator (VCO) intended for use in 2.4GHz radios that utilize a
low-IF or zero-IF architecture. It combines a fully integrat-
ed 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 MAX2753 provides direct
connection 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
adjusted 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. In addition, the MAX2753 pro-
vides differential outputs.
The MAX2753 operates over a +2.7V to +5.5V supply volt-
age range. Internal regulation of the oscillator supply volt-
age eliminates the need for an external LDO regulator for
the VCO. The MAX2753 also provides a digitally controlled
shutdown mode to permit implementation of sophisticated
power-supply management. In shutdown, the supply cur-
rent is reduced to less than 1µA.
________________________Applications802.11 FHSS WLAN
Home RF
2.4GHz Bluetooth ISM Proprietary Radio
FeaturesGuaranteed Frequency Tuning Range: 2400MHz
to 2500MHzCompatible with Low-IF or Zero-IF Radio
ArchitecturesDifferential OutputsOn-Chip Tank CircuitInternally Matched Output Buffer Amplifier 1µA Shutdown Mode+2.7V to +5.5V Supply Voltage RangeMiniature 8-Pin µMAX Package
MAX2753
Oscillator with Differential Outputs
Typical Operating Circuit
Ordering Information
Pin Configuration
ABSOLUTE MAXIMUM RATINGS
MAX2753
2.4GHz Monolithic Voltage-Controlled
Oscillator with Differential Outputs
DC ELECTRICAL CHARACTERISTICS(VCC= +2.7V to +5.5V, VTUNE= +0.4V to +2.4V, VSHDN≥+2V, OUTP = OUTN = connected to 50Ωload, TA= -40°C to +85°C.
AC ELECTRICAL CHARACTERISTICS(MAX2753 EV kit, VCC= +2.7V to +5.5V, VTUNE= +0.4V to +2.4V, VSHDN≥+2V, OUTP = OUTN = connected to 50Ωload,= +25°C. Typical values are at VCC= +3.0V, unless otherwise noted.)
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 TA= +25°C. Limits over temperature are guaranteed by design and characterization.
Note 2:Tuning gain is measured at the oscillator’s guaranteed frequency limits.
Note 3:Turn-on time to within 3dB of final output power
Note 4:Turn-off time to output power of -15dBm.
VCCto GND..............................................................-0.3V to +6V
TUNE, SHDN, BYP,
OUTP, OUTN to GND.................................-0.3V to (VCC+ 0.3V)
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, 10s).................................+300°C
MAX2753
2.4GHz Monolithic Voltage-Controlled
Oscillator with Differential Outputs
SUPPLY CURRENT vs. TEMPERATUREMAX2753 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
TUNING CURRENT vs. TEMPERATURE
MAX2753 toc02
TUNE INPUT CURRENT (nA)
TEMPERATURE (°C)
VCO TUNING CURVE
MAX2753 toc03
VTUNE (V)
FREQUENCY (MHz)
PHASE NOISE
MAX2753 toc04
OFFSET FREQUENCY (MHz)
PHASE NOISE (dBc/Hz)
Typical Operating Characteristics
(MAX2753 EV kit, VCC= +3.0V, VTUNE= +0.4V to +2.4V, VSHDN≥+2V, TA = +25°C, unless otherwise noted.)
MAX2753
2.4GHz Monolithic Voltage-Controlled
Oscillator with Differential Outputs
Detailed Description
OscillatorThe MAX2753 VCO is implemented as an LC oscillator
topology, integrating all of the tank components on-
chip. This fully monolithic approach provides an
extremely easy-to-use VCO, equivalent to a VCO mod-
ule. The frequency is controlled by a voltage applied to
the TUNE pin, which is internally connected to the var-
actor. The VCO core uses a differential topology to pro-
vide a stable frequency versus supply voltage and
improve the immunity to load variations. In addition,
there is a differential buffer amplifier following the oscil-
lator core to provide added isolation from load varia-
tions and to boost the output power.
Output BufferThe oscillator signal from the core drives a differential
output buffer amplifier. Each of the two amplifier out-
puts is internally matched to 50Ωincluding an on-chip
DC-blocking capacitor. No external DC-blocking
capacitor is required, eliminating the need for any
external components. The amplifier boosts the oscillator
signal to a level suitable for driving most RF mixers.
Applications Information
Tune InputThe tuning input is typically connected to the output of
the PLL loop filter. The loop filter provides an appropri-
ately low-impedance source. The input may incorporate
an extra RC filter stage to reduce high-frequency noise
and spurious signals. Any excess noise on the tuning
input is directly translated into FM noise, which can
degrade the phase-noise performance of the oscillator.
Therefore, it is important to minimize the noise intro-
duced on the tuning input. A simple RC filter with low
corner frequency is needed during testing to filter the
noise present on the voltage source driving the tuning
line.
Layout IssuesAlways use controlled impedance lines (microstrip,
coplanar waveguide, etc.) for high-frequency signals.
Always place decoupling capacitors as close to the
VCCpins as possible; for long VCClines, it may be nec-
essary to add additional decoupling capacitors located
further from the device. Always provide a low-induc-
tance path to ground, and keep GND vias as close to
the device as possible. Thermal reliefs on GND pads
are not recommended.
Chip InformationTRANSISTOR COUNT: 176
PROCESS: BiPOLAR
MAX2753
2.4GHz Monolithic Voltage-Controlled
Oscillator with Differential Outputs
MAX2753
2.4GHz Monolithic Voltage-Controlled
Oscillator with Differential Outputs
Package Information
