Datasheet

MAX2750/MAX2751/MAX2752
2.4GHz Monolithic
Voltage-Controlled Oscillators
4
Pin Description
0.1 1 10
PHASE NOISE
MAX2750/51/52 toc07
OFFSET FREQUENCY (MHz)
PHASE NOISE (dBc/Hz)
-150
-130
-140
-110
-120
-90
-100
-80
-60
-70
-50
MAX2750/51/52 toc08
TEMPERATURE (°C)
OUTPUT POWER (dBm)
-5
-4
-3
-2
-40 0-20 20 40
60 80
MAX2751
OUTPUT POWER vs. TEMPERATURE
MAX2750/51/52 toc09
ƒ
O
3ƒ
O
OUTPUT POWER (dBm)
FREQUENCY
Δ = 48dBc
Δ MKR
-30.00dB
Δ = 30dBc
NORMALIZED HARMONIC
OUTPUT SPECTRUM
2ƒ
O
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
CC
= +3.0V, V
TUNE
= +0.4V to +2.4V, V
SHDN
≤ 2V, T
A
= +25°C, unless otherwise noted.)
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
0 4682 101214 1816 20
OSCILLATOR TURN-ON TIME
MAX2750/51/52 toc10
TIME (μs)
OUTPUT POWER (dBm)
8μs
-100
-80
-90
-60
-70
-40
-50
-30
-10
-20
0
0 46821012141816 20
OSCILLATOR TURN-OFF TIME
MAX2750/51/52 toc11
TIME (μs)
OUTPUT POWER (dBm)
4μs
PIN NAME FUNCTION
1 BYP VCO Bypass. Bypass with a 0.1µF capacitor to GND.
2 TUNE
Oscillator Frequency Tuning Voltage Input. High-impedance input with a voltage input range of +0.4V
(low frequency) to +2.4V (high frequency).
3 GND
Ground Connection for Oscillator and Biasing. Requires a low-inductance connection to the circuit
board ground plane.
4 SHDN
Shutdown Logic Input. A high-impedance input logic level low disables the device and reduces
supply current to less than 1.0µA. A logic level high enables the device.
5V
CC1
Bias and Oscillator DC Supply Voltage Connection. Bypass separately from PIN6 with a 220pF
capacitor to GND for low noise and low spurious content performance from the oscillator.
6V
CC2
Output Buffer DC Supply Voltage Connection. Bypass separately from PIN5 with a 220pF capacitor to
GND for best high frequency performance.
7 OUT
Buffered Oscillator Output. Incorporates an internal DC blocking capacitor. OUT is internally matched
to 50Ω.
8 GND
Ground Connection for Output Buffer. Requires a low-inductance connection to the circuit board
ground plane.