DC1660B datasheet, PDF - EEWORLD Datasheet

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DC1660B: Descriptioneval board for ltc6417; CategoryDevelopment board/suite/development tools; File Size197KB，6 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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eval board for ltc6417

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DEMO MANUAL DC1660B

LTC6417

1.6GHz Low Noise Differential

16-Bit ADC Buffer

Description

Demonstration circuit 1660B features the LTC

6417 dif-

ferential 16-bit ADC buffer. The demo board incorporates a

variety of passive components to allow for direct connec-

tion to a two-port network analyzer or other single-ended

50Ω test system.

The demo board is easily configured to control common-

mode voltage V

, clamp voltage CLHI, power adjust

PWRADJ, and SHUTDOWN pins. Other simple PCB modifi-

cations can accommodate differential input/output signals.

Design files for this circuit board are available at

http://www.linear.com/demo

LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Quick start proceDure

DC1660B is easy to set up to evaluate the performance of

the LTC6417. Refer to Figure 1 for proper measurement

equipment setup and follow the procedure below:

1. Connect SMA cables to IN

and OUT

ports.

2. Apply 5.0V between V

and GND turrets.

Tie PWRADJ (TURRET E4) to V

. Limit supply current

to approximately 150mA.

3. V

, CLHI and SHDN turrets may be left floating.

This procedure contains a critical sequence. The user

must apply supply voltage before applying signal power

to the inputs or forcing a voltage to any other turrets. The

user must also remove the signal from the input ports

and voltages on any other turret before turning down

the supply voltage. This proper sequence will prevent

excessive current through the ESD diodes from any pin

to the positive supply V

Table 1 shows the function of

each SMA connector on the board. Only J1, J3 and J5

are used in the default configuration. J2 and J4 provide

flexibility for differential input/output signals.

Table 1. DC1660B SMA Connectors

CONNECTOR

J1 (IN

)

J2 (IN

–

)

J3 (OUT

)

J4 (OUT

–

)

J5 (OR)

FUNCTION

Differential input connected to input balun for single-

ended operation. Drive from a 50Ω signal source.

No external termination needed.

Differential Input. Not connected by default. Remove

capacitor C12 to drive the input balun differentially.

Differential output connected to balun for single-ended

operation. Connect to a 50Ω network/spectrum

analyzer input.

Differential Output. Not connected by default. Remove

capacitor C11 to drive the input balun differentially.

Overrange Output. Connect to oscilloscope for

monitoring the output signal.

dc1660bf

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