MAX2620EVKIT datasheet(1/4 Pages) MAXIM

Part No.	MAX2620EVKIT

Description	Evaluation Kit

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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_________________________Quick Start

The MAX2620 EV kit is fully assembled and factory test-

ed. Follow the instructions in the

Connections and

Setup section.

__________Test Equipment Required

• Power supplies. Low-noise power supplies are rec-

ommended for oscillator-noise measurements. This

is especially important for the tuning voltage sup-

plied to the varactor (VCONT). Noise or ripple on

the tuning voltage frequency-modulates the oscilla-

tor and causes spectral spreading. Batteries can be

used in place of power supplies, if necessary.

—DC supply capable of supplying +2.7V to +5.25V

at 20mA. Alternatively, use two or three 1.5V AA

batteries.

—DC supply capable of supplying 0V to +3V, con-

tinuously variable, for VCONT. Alternatively, use

two or three 1.5V batteries with a resistive volt-

age divider or potentiometer.

________________General Description

The MAX2620 evaluation kit (EV kit) simplifies evalua-

tion of the MAX2620 integrated oscillator with buffered

outputs. It includes a varactor-based tank circuit that

allows the VCO to tune across an approximately 30MHz

band in the 900MHz frequency range. Outputs utilize

50

Ω SMA connectors. The EV kit has a test port that

facilitates complete characterization of the MAX2620

tank port, enabling resonators to be designed for fre-

quency ranges other than that supplied with the EV kit.

____________________________Features

o Complete, Tunable VCO Test Board with Tank

Circuit

o Tuning in 900MHz Frequency Range

o Low Phase Noise (-110dBc/Hz typical at 25kHz

offset from carrier)

o Operates from Single +2.7V to +5.25V Supply

o Two Output Buffers with 50

Ω SMA Connectors

o Low-Power Shutdown Mode

o Test Port for Oscillator Tank Port Characterization

o Fully Assembled and Tested

MAX2620 Evaluation Kit

________________________________________________________________

Maxim Integrated Products

1

QTY

DESCRIPTION

C1, C7–C10,

C12

6

C2, C11, C14

0

C3

1

2.7pF, 10% ceramic capacitor

C4, C6

2

C5, C13, C17

3

1.5pF, 10% ceramic capacitors

C15

1

D1

1

JU1, VCC,

GND

3

L1

1

Ceramic coaxial resonator

Trans-Tech SR8800LPQ1357BY

L4

0

Not installed

L3

1

10nH inductor

Coilcraft 0603HS-10NTJBC

OUT, OUT,

TEST PORT

3

SMA connectors (edge mount)

R1, R3

2

10

Ω, 5% resistors

1pF, 10% ceramic capacitors

Not installed

1000pF, 10% ceramic capacitors

SUPPLIER

PHONE

FAX

Alpha Industries

(617) 935-5150

(617) 824-4579

______________Component Suppliers

DESIGNATION

10µF, ±10%, 25V tantalum capacitor

Sprague 293D106X9025D2

Varactor diode

Alpha Industries SMV1204-34

2-pin headers

____________________Component List

______________Ordering Information

Coilcraft

(847) 639-6400

(847) 639-1469

Sprague

(603) 224-1961

(603) 224-1430

Trans-Tech

(301) 695-9400

(301) 695-7065

PART

MAX2620EVKIT

-40°C to +85°C

TEMP. RANGE

BOARD TYPE

Surface Mount

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

R2

1

1k

Ω, 5% resistor

R4

0

Not installed

R5

1

51

Ω, 5% resistor

SHDN

1

3-pin header

U1

1

MAX2620EUA

VCONT

1

SMA connector (PC mount)

None

1

Shunt

None

1

MAX2620 circuit board

None

1

MAX2620 data sheet

NOTE: All capacitors and resistors are size 0805 unless other-

wise noted.

19-1248; Rev 1; 5/98

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