OSCILLATOR

CORE

BIAS

TUNE

LOOP FILTER

BYP

0.1

μF

SHDN

GND

OUT

GND

SHDN

220pF

220pF

MAX2750AUA

OUT TO MIXER/

SYNTHESIZER

FROM

SYNTHESIZER

Figure 1. Typical Application Circuit

2.4GHz Monolithic

Voltage-Controlled Oscillator for Automotive

4

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Pin Description

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.

5

Bias and Oscillator DC Supply Voltage Connection. Bypass separately from pin 6 with a 220pF

capacitor to GND for low noise and low spurious content performance from the oscillator.

6

Output Buffer DC Supply Voltage Connection. Bypass separately from pin 5 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 50 .

8

GND

Ground Connection for Output Buffer. Requires a low-inductance connection to the circuit board ground

plane.