CLC5957PCASM datasheet(9/12 Pages) NSC

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Description

The Evaluation board for the CLC5957 allows for easy

test and evaluation of the product. The part may be

ordered with all components loaded and tested. The

order number is the CLC5957PCASM. The user supplies

an analog input signal, encode signal and power to the

board and is able to take latched 12-bit digital data out of

the board.

ENCODE Input (ENC)

The ENCODE input is an SMA connector with a

termination of 50

Ω. The encode signal is converted to an

AC coupled, differential clock signal centered between

VCC and ground. The user should supply a sinusoidal or

square wave signal of >200mVpp and <4Vpp with a 50%

duty cycle. The duty cycle can vary from 50% if the

minimum clock pulse width times are observed. A low

jitter source will be required for IF-sampled analog input

signals to maintain best performance.

CLC5957 Clock Option

The CLC5957 evaluation board is conﬁgured for use with

an optional crystal clock oscillator source. The compo-

nent Y1 may be loaded with a ”Full-sized”, HCMOS type,

crystal oscillator.

Analog Input (AIN)

The analog input is an SMA connector with a 50

Ω

termination. The signal is converted from single to

differential by a transformer with a 5 to 260MHz band-

width and approximately one dB loss. Full scale is approx-

imately 11dBm or 2.2Vpp. It is recommended that the

source for the analog input signal be low jitter, low noise

and low distortion to allow for proper test and evaluation

of the CLC5957.

Supply Voltages (J1 pins 31 A&B and 32 A&B)

The CLC5957PCASM is powered from a single 5V

supply connected from the referenced pins on the Euro-

card connector. The recommended supplies are low

noise linear supplies.

Digital Outputs (J1 pins 7B (MSB, D11) through 18B

(LSB) and 20B (Data Valid))

The digital outputs are provided on the Eurocard

connector. The outputs are buffered by 5V CMOS latches

with 50

Ω series output resistors. The rising edge of Data

Valid may be used to clock the output data into data

collection cards or logic analyzers. The board has a

location for the HP 01650-63203 termination adapter

for HP 16500 logic analyzers to simplify connection to

the analyzer.

CLC5957 Evaluation Board

CLC5957PCASM 数据表(PDF) 9 Page - National Semiconductor (TI)

CLC5957PCASM 数据表(HTML) 9 Page - National Semiconductor (TI)

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