MAX2170EVKIT datasheet(3/8 Pages) MAXIM

Part #	MAX2170EVKIT

Description	Evaluation Kit

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Manufacturer	MAXIM [Maxim Integrated Products]

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Quick Start

Recommended Equipment

This section lists the recommended test equipment to

verify operation of the MAX2170. It is intended as a

guide only, and some substitutions are possible:

• One RF signal generator capable of delivering at

least +5dBm of output power at the operating fre-

quency (HPE4433B or equivalent)

• An RF spectrum analyzer that covers the MAX2170

operating-frequency range (e.g., FSEB20)

• A power supply capable of up to 1A at +2.7V to

+6.0V

• One ammeter for measuring the supply current

(optional)

•50Ω SMA cables

•50Ω BNC cables

• A network analyzer (e.g., HP 8753D) to measure

small-signal return loss (optional)

Procedure

Measurement Considerations

The MAX2170 EV kit includes an on-board buffer that

converts the baseband differential outputs to a single-

ended output (see Figure 1 for details). The buffer is

configured for a gain of one. The output of the buffer

consists of a 50Ω resistor in series for matching to RF

test equipment. Note that there is a 6dB loss at the out-

put if 50Ω test equipment is used. This loss must be

accounted for when measuring gain.

Connections and Setup

The MAX2170 EV kit is fully assembled and tested. This

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

EV kit and testing the device’s function. Caution: Do

not turn on the DC power or RF signal generators until

all connections are made:

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

ammeter if desired) to the VCC and GND terminals

on the EV kit. Do not turn on the supply. Note that

VCC and VCC2 on the EV kit board are shorted

together through JP3.

2) Connect a DC supply set to +2.4V (maximum gain)

to the RFAGC terminal on the EV kit. Do not turn on

the supply.

3) Connect a DC supply set to +2.4V (maximum gain)

to the BBAGC terminal on the EV kit. Do not turn on

the supply.

4) Connect one RF signal generator to either the VHF-

III, FM, or L-BAND input through the SMA connec-

tors J3 and J4, respectively. Do not turn on the gen-

erator’s output.

5) Connect the baseband output on the EV kit to a

spectrum analyzer through a BNC cable.

6) Connect the EV kit board to the PC through a paral-

lel cable.

7) Turn on the DC supply. The supply current should

read approximately 70mA.

8) Run the control software on an IBM-compatible PC.

Using the control software, configure the following:

a) Select the desired band of operation and chan-

nel through the Block section of the software’s

graphical interface.

b) Based on the LO frequency, the EV kit software

automatically sets the appropriate tracking-filter

settings in VHF/FM mode.

c) The power-detector threshold is factory-calibrat-

ed to a typical input power of -52dBm. This infor-

mation is stored in bits <7:5> of register 00 in the

ROM table. The EV kit software automatically

loads the information stored in bits <7:5> of reg-

ister 00 in the ROM table into bits <7:5> in regis-

ter 08 to set the proper power-detector

response.

d) The baseband filter is factory-trimmed to have a

typical bandwidth (-3dB corner) at 0.8 MHz. The

information is stored in bits <2:0> of register 04

in the ROM table. The EV kit software automati-

cally loads the information stored in bits <2:0> of

register 04 in the ROM table into bits <2:0> in

register 08 to set proper baseband filter band-

width.

e) The VCO Auto Selection (VAS) is already

enabled through default settings (this allows the

software to pick the appropriate VCO sub-band

for the desired operation frequency). If desired,

the VAS can be turned off to manually select the

desired sub-band. VAS can be disabled through

the VAS_EN bit on the Registers or Block sec-

tion of the software.

9) Activate and set the power level of the RF generator

to achieve 1VP-P at the IF connector output or

0.5VP-P (-2dBm) when loaded by a 50Ω instrument.

MAX2170 Evaluation Kit

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