MAX1479EVKIT [MAXIM]

Proven Components Parts List;


型号：	MAX1479EVKIT
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Proven Components Parts List
文件：	总6页 (文件大小：126K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-3726; Rev 0; 5/05

MAX1479 Evaluation Kit

General Description

Features

♦ Proven PC Board Layout

The MAX1479 evaluation kit (EV kit) allows for a detailed

evaluation of the MAX1479 ASK/FSK transmitter. It

enables testing of the device’s RF performance and

requires no additional support circuitry. The RF output

uses a 50Ω matching network and an SMA connector for

convenient connection to test equipment. A reverse polar-

ity SMA is also included to connect to a 1/4 wave whip

antenna. The EV kit can also directly interface to the

user’s embedded design for easy data encoding.

♦ Proven Components Parts List

♦ Multiple Test Points Provided on Board

♦ Available in 315MHz or 433.92MHz Optimized

Versions

♦ Adjustable Frequency Range from 300MHz to

450MHz*

The MAX1479EV kit comes in two versions: a 315MHz

version and a 433.92MHz version. The passive compo-

nents are optimized for these frequencies. These compo-

nents can easily be changed to work at RF frequencies

from 300MHz to 450MHz.

♦ Fully Assembled and Tested

♦ Can Operate as a Stand-Alone Transmitter with

Included Battery

*Requires component changes.

For easy implementation into the customer’s design, the

MAX1479EV kit also features a proven PC board layout,

which can be easily duplicated for quicker time-to-

market. The EV kit Gerber files are available for down-

load at www.maxim-ic.com.

Ordering Information

PART

TEMP RANGE

-40°C to +85°C

IC PACKAGE

16 Thin QFN

MAX1479EVKIT-315

MAX1479EVKIT-433

Component List

DESIGNATION QTY

DESCRIPTION

DESIGNATION QTY

DESCRIPTION

0.47µF +80/-20ꢀ, 16V ceramic

capacitors (0603) Y5V

Murata GRM188F51C474Z

15pF 5ꢀ, 50V ceramic capacitors

(0603)

Murata GRM1885C1H150J

C1, C6

C7, C9

(315MHz)

220pF 5ꢀ, 50V ceramic capacitors

(0603)

Murata GRM1885C1H221J

6.8pF 0.5pF, 50V ceramic capacitors

(0603) C0G

Murata GRM1885C1H6R8D

C1, C6

C8, C11, C12

C13 (315MHz)

C13 (433MHz)

C14, C15

(433MHz)

2.2pF 0.5pF, 50V ceramic capacitor

(0603) C0G

Murata GRM1885C1H2R2D

22pF 5ꢀ, 50V ceramic capacitor

(0603) C0G

Murata GRM1885C1H220J

C2 (315MHz)

C2 (433MHz)

C3, C10

1.0pF 0.5pF, 50V ceramic capacitor

(0603) C0G

Murata GRM1885C1H1R0D

10pF 5ꢀ, 50V ceramic capacitor

(0603) C0G

Murata GRM1885C1H100J

100pF 5ꢀ, 50V ceramic capacitors

(0603)

0.01µF 10ꢀ, 50V ceramic capacitors

(0603)

Murata GRM1885C1H101J

Murata GRM188R71H103KA01

3-pin headers

Digi-Key S1012-36-ND or equivalent

680pF 5ꢀ, 50V ceramic capacitor

(0603) C0G

Murata GRM1885C1H681J

JU1–JU10

L1 (315MHz)

L1 (433MHz)

27nH 5ꢀ inductor (0603)

Coilcraft 0603CS-27NXJB

C5, C16,

C18, C19

Not installed

22nH 5ꢀ inductor (0603)

Coilcraft 0603CS-22NXJB

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX1479 Evaluation Kit

Component List (continued)

DESIGNATION QTY

DESCRIPTION

DESIGNATION QTY

DESCRIPTION

SMA connector top mount, not installed

Digi-Key J500-ND

Johnson 142-0701-201

22nH 5ꢀ inductor (0603)

Coilcraft 0603CS-22NXJB

L2 (315MHz)

REF_IN

18nH 5ꢀ inductor (0603)

Coilcraft 0603CS-18NXJB

L2 (433MHz)

SMA connector top mount

Digi-Key J500-ND

Johnson 142-0701-201

RF_OUT

5kΩ potentiometer

BC Components SM4W502

MAX1479ATE

0Ω resistor (0603), any,

not installed

VDD, VSS,

ENABLE,

DATA_IN,

CKOUT

Test points

Mouser 151-203 or equivalent

5.1Ω 5ꢀ resistor (0603), any

0Ω resistor (0603), any

315MHz 1/4-wave whip antenna,

not provided

Lynx ANT-315-CW-RH

Antenna

(315MHz)

Crystal 9.84375MHz

Hong Kong Crystal

SSL9843750E03FAFZ800 or

Crystek 017000

Y1 (315MHz)

Y1 (433MHz)

433MHz 1/4-wave whip antenna,

not provided

Lynx ANT-433-CW-RH

Antenna

(433MHz)

Crystal 13.56MHz

Hong Kong Crystal

SSM1356000E03FAFZ800 or

Crystek 017001

RP-SMA connector

Linx CONREVSMA001

ANTENNA_OUT

BAT1

Battery holder

MPD BA2032

Shunt (JU1)

Digi-Key S9000-ND or equivalent

—

Coin-cell battery

Panasonic BR2032

Battery

MAX1479 EV kit PC board

Connections and Setup

This section provides a step-by-step guide to operating

the EV kit and testing the device’s functionality. Do not

turn on the DC power until all connections are made:

Component Suppliers

SUPPLIER

Coilcraft

PHONE

FAX

800-322-2645

800-237-3061

852-2412-0121

800-831-9172

847-639-1469

941-561-1025

852-2498-5908

814-238-0490

1) Connect a DC supply set to +3.0V, through an

ammeter, to the VDD and VSS terminals on the EV

kit. Do not turn on the supply.

2) Connect the RF_OUT SMA connector to the spec-

trum analyzer. Set the analyzer to a center frequency

of 315MHz (or 433.92MHz) and a span of 1MHz.

3) Turn on the DC supply. The spectrum analyzer

should display a peak of about +10dBm at

315MHz (or 433.92MHz).

4) Disconnect the spectrum analyzer and connect

the power meter instead. Measure the output

power and also the current draw.

Crystek

Hong Kong Crystal

Murata

Note: Indicate you are using the MAX1479 when contacting

these manufacturers.

Quick Start

The following procedure allows for proper device

evaluation.

Required Test Equipment

•

Regulated power supply capable of providing +3.0V

Spectrum analyzer such as the Agilent 8562E

Optional ammeter for measuring supply current

Power meter such as the Agilent EPM-441A

5) Calculate the efficiency. This is done using the

following equation:

/10)/(V x I)

Efficiency = 10ˆ OUT

For example, for a +10.8dBm output, and a

10.9mA (at 3.0V) current, the efficiency is 37ꢀ.

_______________________________________________________________________________________

MAX1479 Evaluation Kit

Data Input

The MAX1479 EV kit transmits ASK and FSK data with

data rates of up to 100kbps (ASK) or 20kbps (FSK).

JU2 controls whether the MAX1479 transmits the ASK

carrier frequency (or the FSK high frequency), turns off

the PA (or transmits the FSK low frequency), or trans-

mits an external data stream. See Table 1.

Layout Issues

A properly designed PC board is an essential part of any

RF/microwave circuit. On high-frequency inputs and out-

puts, use controlled-impedance lines and keep them as

short as possible to minimize losses and radiation. At

high frequencies, trace lengths that are on the order of

λ/10 or longer can act as antennas.

REF_IN External Frequency Input

For applications where the correct frequency crystal is

not available, it is possible to directly inject an external

frequency through the REF_IN SMA (not provided).

Connect the SMA to a low-phase-noise generator. The

addition of C18 and C19 is necessary (use 0.01µF

capacitors).

Keeping the traces short also reduces parasitic induc-

tance. Generally, 1in of a PC board trace adds about

20nH of parasitic inductance. The parasitic inductance

can have a dramatic effect on the effective inductance.

For example, a 0.5in trace connecting a 100nH inductor

adds an extra 10nH of inductance or 10ꢀ.

To reduce the parasitic inductance, use wider traces

and a solid ground or power plane below the signal

traces. Also, use low-inductance connections to ground

on all GND pins, and place decoupling capacitors

close to all VDD connections.

Battery Operation

The MAX1479 EV kit can be powered by an external

power supply or by the supplied 3V coin-cell battery. Set

jumper JU3 to connect pins 2 and 3 for battery operation.

The EV kit PC board can serve as a reference design

for laying out a board using the MAX1479.

RF Output

The MAX1479 EV kit includes two SMA connectors for

RF output. RF_OUT is a standard SMA and is used to

connect the PA output to test equipment. Output is

matched to 50Ω. ANTENNA_OUT is a reverse polarity

SMA and is used to connect to the 1/4-wave whip

antenna (not supplied). Note that resistor R2 (0Ω)

needs to be added.

Detailed Description

Power-Down Control

The MAX1479 can be controlled externally using the

ENABLE connector. The IC draws approximately 0.2nA

(at room temperature) in shutdown mode. Jumper JU1

is used to control this mode. The shunt can be placed

between pins 1 and 2 to enable the device. Remove

the JU1 shunt for external control. See Table 1 for

jumper function descriptions.

Modulation Mode Input

Jumper JU4 sets the mode of transmission. Set jumper

JU4 to connect pins 1 and 2 for FSK mode, 2 and 3 for

ASK mode.

FSK Frequency Deviation

The FSK deviation is set by jumpers JU5 through JU7.

The maximum deviation depends on the PC board para-

sitics. The EV kit max is around 50kHz (315MHz). If very

large FSK frequency deviations are desired, use a crystal

with a larger motional capacitance and/or reduce PC

board parasitic capacitances. One way to reduce para-

sitic capacitances on the EV kit is to remove C14, C15,

and C16 and move the crystal closer to the IC.

Table 1. JU1 Through JU4 Jumpers

Function

JUMPER

STATE

1-2

FUNCTION

RF carrier transmit enable

Power-down mode

JU1

2-3

N.C.

External power-down control

RF carrier transmit mode (ASK),

FSK high frequency (FSK)

1-2

2-3

JU2

PA off, PLL ON (ASK),

FSK low frequency (FSK)

N.C.

1-2

2-3

1-2

2-3

External data transmit

External supply operation

Battery operation

FSK mode

JU3

JU4

ASK mode

_______________________________________________________________________________________

MAX1479 Evaluation Kit

Table 2. Clock-Divider Settings

JUMPER

SETTING

1-2

JUMPER

SETTING

1-2

JUMPER

SETTING

1-2

FUNCTION

Max deviation

1-2

2-3

7/8 x max deviation

3/4 x max deviation

5/8 x max deviation

1/2 x max deviation

3/8 x max deviation

1/4 x max deviation

1/8 x max deviation

1-2

2-3

1-2

2-3

JU5

JU6

JU7

2-3

1-2

2-3

1-2

2-3

1-2

2-3

Clock Output

I/O Connections

Jumpers JU8 and JU9 set the divider ratio for the clock

output. See Table 3 for the settings.

Table 5 is a list of all I/O connections.

Table 5. I/O Connectors

Table 3. Clock Divider Settings

SIGNAL

RF_OUT

REF_IN

DESCRIPTION

JUMPER SETTING JUMPER SETTING

FUNCTION

RF output

1-2

2-3

1-2

2-3

1-2

/16

XTAL

External reference frequency input

ANTENNA_OUT Reverse polarity SMA for 1/4-wave antenna

JU8

JU9

VSS

Ground

VDD

Power-supply input

Data input

Logic 0

output

2-3

DATA_IN

ENABLE

CLKOUT

Power-down control

Buffered clock output

Envelope Shaping

Jumper JU10 sets envelope shaping for a more gentle

turn-on/turn-off of the PA in ASK mode. Set jumper

JU10 to connect pins 2 and 3 to allow for envelope

shaping. See Table 4 for settings.

For additional information and a list of application

notes, consult the www.maxim-ic.com website.

Table 4. JU10 Jumper Function

JUMPER

STATE

1-2

FUNCTION

No envelope shaping

Envelope shaping

JU10

2-3

_______________________________________________________________________________________

MAX1479 Evaluation Kit

C14

100pF

C15

100pF

C19

OPEN

50Ω OUTPUT

AT 315MHz

REF_IN

Y1*

AT 433.92MHz

6.8pF

C13

15pF

22pF

10pF

C16

OPEN

15pF

6.8pF

2.2pF

1.0pF

†

27nH

22nH

†

22nH

18nH

9.84375MHz

13.56MHz

XTAL1

MODE

DIN

XTAL2

GND

†

USE WIRE-WOUND INDUCTORS ONLY.

C18

OPEN

VDD

VSS

JU4

VDD

MAX1479

5.1Ω

JU3

VDD

0.47µF

C11

220pF

C10

0.01µF

DATA_IN

ENABLE

CKOUT

JU2

BAT1

0Ω

VDD_PA

ROUT

0.47µF

220pF

0.01µF

VDD

JU10

JU1

5kΩ

ENABLE

CLKOUT

C12

220pF

680pF

L1*

C1*

L2*

RF_OUT

PAOUT

C13*

C2*

C6*

CLK0

CLK1

VDD

DEV0

DEV1

VDD

DEV2

OPEN

VDD

ANTENNA_OUT

JU9

JU7

JU5

2 3

VDD

JU8

VDD

JU6

1 2 3

Figure 1. MAX1479 EV Kit Schematic

_______________________________________________________________________________________

MAX1479 Evaluation Kit

Figure 3. MAX1479 EV Kit PC Board Layout—Component Side

Figure 2. MAX1479 EV Kit Component Placement Guide—

Component Side

Figure 4. MAX1479 EV Kit PC Board Layout—Solder Side

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

Printed USA

is a registered trademark of Maxim Integrated Products, Inc.

MAX1479EVKIT [MAXIM]

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