MAX2671EVKIT-T [MAXIM]

Easy Evaluation of All Product Functions;


型号：	MAX2671EVKIT-T
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Easy Evaluation of All Product Functions
文件：	总6页 (文件大小：98K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-1382; Rev 1; 9/99

MAX2660/MAX2661/MAX2663/MAX2671

Evaluation Kits

General Description

Features

The MAX2660/MAX2661/MAX2663/MAX2671 evaluation

kits simplify evaluation of the MAX2660/MAX2661/

MAX2663/MAX2671 upconverter mixers. They enable test-

ing of all the functions, with no additional support circuitry.

Signal inputs and outputs use SMA connectors and are

compatible with the 50Ω impedance of test equipment.

Each EV kit is shipped with a Maxim device configured

for operation with an IF input frequency of 40MHz to

500MHz, and LO input frequency of 600MHz to

2400MHz. The output matching network of each kit is

optimized for an RF output frequency of 900MHz.

ꢀ +2.7V to +5.5V Single Supply

ꢀ Output Matched to 50Ω at 900MHz

ꢀ Optimal Component Placement

ꢀ Easy Evaluation of All Product Functions

ꢀ All Critical Peripheral Components Included

Ordering Information

Component List

DESCRIPTION

PART

TEMP. RANGE

-40°C to +85°C

PIN-PACKAGE

6 SOT23-6

MAX2660EVKIT-T

MAX2661EVKIT-T

MAX2663EVKIT-T

MAX2671EVKIT-T

DESIGNATION QTY

COMPONENTS COMMON TO ALL EVALUATION KITS

C1, C2, C5,

C8, C9

220pF 10% (0603) ꢀN0 ceramic

capacitors

47pF 10% (0603) ꢀN0 ceramic

capacitors

C3, C4, C7

C10

10µF 20%, 6.3V A-size tantalum

capacitor

Component Suppliers

J1, J2, J3

JU1

SMA connectors

SUPPLIER

AVX

PHONE

FAX

3-pin header, 0.025” sq., 0.10" centers

33nH inductor

803-946-0690

847-297-0700

803-626-3123

847-699-7864

Toko

18nH inductor

100Ω 5% (0603) resistor

MAX2660 EV KIT ADDITIONAL COMPONENTS

_________________________Quick Start

Each EV kit is fully assembled and factory tested.

Follow the instructions in the Connections and Setup

section.

1pF 0.1pF (0603) ꢀN0 ceramic

capacitor

MAX2660, SOT23-6, upconverter

mixer

MAX2661 EV KIT ADDITIONAL COMPONENTS

Test Equipment Required

1pF 0.1pF (0603) ꢀN0 ceramic

EQUIPMENT

DESCRIPTION

capacitor

Capable of supplying +2.7V to

+5.5V at a minimum of 50mA

MAX2661, SOT23-6, upconverter

mixer

DC Nower Supply

HN 8561E Spectrum

Analyzer

Or equivalent high-sensitivity

spectrum analyzer

MAX2663 EV KIT ADDITIONAL COMPONENTS

1.8pF 0.1pF (0603) ꢀN0 ceramic

capacitor

To monitor supply voltage and

supply current (if desired)

Digital multimeters

MAX2663, SOT23-6, upconverter

mixer

HN 8648C RF Generators,

For the IFIꢀ and LO inputs or

equivalent sine-wave sources

MAX2671 EV KIT ADDITIONAL COMPONENTS

1pF 0.1pF (0603) ꢀN0 ceramic

capacitor

MAX2671, SOT23-6, upconverter

mixer

________________________________________________________________ Maxim Integrated Products

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

For small orders, phone 1-800-835-8769.

MAX2660/MAX2661/MAX2663/MAX2671

Evaluation Kits

Connections and Setup

1) Verify the DC power supply is set to less than +5.5V

before attaching the supply to the EV kit. A good

starting voltage is +3.0V.

Table 2. Typical Conversion Gain

PART

CONVERSION GAIN (dB) AT 900MHz

MAX2660

MAX2661

MAX2663

MAX2671

+7.0

+10.7

+3.4

2) Verify the SHDN jumper is in the “V ” position.

3) Connect a signal generator to the IFIꢀ connector

using an SMA cable. As with any precision RF con-

nector, be careful while threading the connector. For

optimal performance, consult the connector manu-

facturer’s specifications for torque recommendation.

Set the generator’s output to 70MHz at -30dBm

power level.

+11.2

Detailed Description

Figure 1 is the schematic for the EV kit as shipped. The

output matching components, L1, L2, C5, and C6, are

optimized for an output frequency of 900MHz.

Capacitors C1 and C2 are DC blocking capacitors for

the IFIꢀ and LO input ports. To reduce the possibility of

noise pickup, resistor R1 and capacitor C8 form a low-

pass filter at the SHDN pin.

4) Connect a second signal generator to the LO input

connector using an SMA cable. Set the generator’s

output to 970MHz at -5dBm power level (use

-10dBm for the MAX2671 EV Kit).

5) Connect the RF output of the EV kit to the spectrum

analyzer using an SMA cable. Take care to use qual-

ity connector adapters for the spectrum analyzer’s

input. Avoid using BꢀC-type connectors due to their

high VSWR while operating in the gigahertz range.

Capacitors C3, C4, C7, C9, and C10 form the V

decoupling network. ꢀote the location of each compo-

nent. Capacitor C10, a 10µF tantalum type, is located

near the V

input test point. This serves as the central

node for distribution of V

to the mixer’s supply pin

6) To assist in troubleshooting, verify the correct volt-

ages on the NC board with a multimeter. Use Table 1

to verify correct node voltage during proper opera-

tion.

and the output pull-up inductor L2. Both of these sup-

ply points need separate bypass capacitors as well as

separate traces on the NC board. This is prudent prac-

tice to curtail crosstalk in high-frequency systems.

Modifying the EV Kit

Table 1. Nominal DC Voltages

The EV kit is easily configured for use with any of the

MAX2660/MAX2661/MAX2663/MAX2671 devices. Each

of these devices offers different performance levels for

system optimization.

PIN NUMBER

PIN NAME NOMINAL DC VOLTAGE (V)

GꢀD

- 0.4) to (V

- 1.0)

IFIꢀ

+1.37

Changing to Different Devices

To configure the EV kit for a different device, use

appropriate surface-mount rework equipment to

remove the existing IC from the NCB. Take care to

ensure that the package temperature does not exceed

the limits listed in the Absolute Maximum Ratings sec-

tion of the MAX2660/MAX2661/MAX2663/MAX2671/

MAX2673 data sheet. Install the new device using

appropriate surface-mount equipment and techniques.

See Table 3 for the correct component values for the

desired operating frequency and device type.

RF OUT

+2.7 to +5.5

for normal operation

SHDN

Analysis

1) Set the spectrum analyzer’s center frequency to

900MHz, with a span of 30MHz.

2) Set the marker position to the peak level.

3) Read the output power of the center frequency. This

should be -28dBm to -21dBm, depending on which

device is used. The output frequency is equal to the

algebraic difference of the LO and IF frequencies.

The power is equal to the IFIꢀ input power plus the

conversion gain of the upconverter mixer. See Table

2 for the typical conversion gain of each device.

Operation at Other Frequencies

Changing the EV kit to operate at frequencies other

than listed in Table 3 involves matching each device’s

output impedance to 50Ω at the frequency of interest.

_______________________________________________________________________________________

MAX2660 Evaluation Kit

Table 3. Output Matching Components vs. RF Output Frequency

COMPONENT VALUE AT A GIVEN RF OUTPUT FREQUENCY (MHz)

PART

COMPONENT

AT 400

Short

AT 900

220

AT 1900

8.2

2.7

AT 2450

3.3

L1 (nH)

L2 (nH)

C3 (pF)

C4 (pF)

C5 (pF)

C6 (pF)

C7 (pF)

L1 (nH)

L2 (nH)

C3 (pF)

C4 (pF)

C5 (pF)

C6 (pF)

C7 (pF)

L1 (nH)

L2 (nH)

C3 (pF)

C4 (pF)

C5 (pF)

C6 (pF)

C7 (pF)

L1 (nH)

L2 (nH)

C3 (pF)

C4 (pF)

C5 (pF)

C6 (pF)

C7 (pF)

2.2

220

3300

6.8

MAX2660

220

1.5

Open

470

Short

220

8.2

2.7

3.3

1.8

470

220

3300

6.8

MAX2661

MAX2663

MAX2671

100

1.5

220

Open

470

Short

220

1.8

220

8.2

1.8

3.3

1.8

220

3300

6.8

100

1.8

220

Open

220

Short

8.2

2.7

3.3

1.8

220

3300

6.8

100

1.5

220

Open

220

_______________________________________________________________________________________

MAX2660/MAX2661/MAX2663/MAX2671

Evaluation Kits

VCC

C10

CAPAVX

10µF

16V

220pF

JU1

VCC

100

220pF

SMA

SHDN

220pF

MAX2660

GND

VCC

47pF

IFIN

RFOUT

SMA

220pF

33nH

220pF

SMA

18nH

VCC

47pF

Figure 1. MAX2660 EV Kit Schematic

_______________________________________________________________________________________

MAX2660 Evaluation Kit

1.0"

Figure 2. MAX2660 EV Kit PC Board Layout—Component Side

_______________________________________________________________________________________

MAX2660/MAX2661/MAX2663/MAX2671

Evaluation Kits

1.0"

Figure 3. MAX2660 EV Kit PC Board Layout—Component

Side Metal

Figure 4. MAX2660 EV Kit PC Board Layout—Solder Side

Metal

_______________________________________________________________________________________

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