PRELIMINARY TECHNICAL DATA

EVAL-ADE7756EB

–9–

REV. PrB 01/01

PRELIMINARYTECHNICALDATA

EvaluationboardBOM

Designator

Value

Description

R3, R5, R6, R13, R22,

R30, R31, R33, R34, R37 100

Ω, 5%, ¼W

Resistor, no special requirements

R2, R7, R8, R9, R10,

R39, R40

10k

Ω, 5%, ¼W

Resistor, no special requirements

R1, R14 - R27, R36

820

Ω, 5%, ¼W

Resistor, no special requirements

R50, R51, R52, R57

1k

Ω, 0.1%, ¼W

±15 ppm/°C Resistor, good tolerance, used as part of the analog filter

network.These resistors are not soldered, but are plugged into PCB

pin sockets for easy modification by the customer.

Low drift

WELWYN RC55 Series, FARNELL part no. 339-179

R53, R54

255k

Ω, 0.1%, ¼W

Pin socketed, ±15 ppm/°C Low drift, WELWYN RC55 Series.

Farnell part no. 338-484

R41, R42

100

Ω, 0.1%, ¼W

±15 ppm/°C Resistor, good tolerance. Low drift

FARNELL part no. 338-217

R11

51

Ω, 1%, ¼W

Not populated, pin socket to be used with external 50

Ω clock source.

R4

0

Ω, 10%, ¼W

C5, C7, C24,C28, C30

10µF, 10V d.c.

Power supply decoupling capacitors, 20%, AVX-KYOCERNA,

FARNELL part no. 643-579

C14, C15

22pF, ceramic

Gate oscillator load capacitors, FARNELL part no. 108-927

C6, C8, C23, C25, C27

C29, C31-C36

100nF, 50V

Power supply decoupling capacitors, 10%, X7R type, AVX-

KYOCERNA, FARNELL part no. 108-950

C16

220pF

AVX-KYOCERNA, FARNELL part no. 108-946

C11, C21, C50, C51,

C53, C54

33nF, 10%, 50 volt

X7R Capacitor, part of the filter network. These resistors are not

soldered, but are plugged into PCB mount sockets for easy modifica-

tion by the customer. SR15 series AVX-KYOCERNA, FARNELL

part no. 108-948

U 1

AD7756AN

Supplied by Analog Devices Inc.

U2, U3

74HC08

Quad CMOS AND gates

U 4

AD780

2.5V reference, Supplied by Analog Devices Inc.

U5, U7, U8, U9

HCPL2232

HP Optical Isolator, Newark part no. 06F5434

U 6

HCPL2211

HP Optical Isolator, Newark part no. 06F5428

LED1- LED4

L E D

Low current, Red, FARNELL part no. 637-087

XTAL

3.579545MHz

Quartz Crystal, HC-49(US), ECS no. ECS-35-17-4

Digi-Key no. X079-ND

SK1, SK3, SK5

screw terminal

15A, 2.5mm cable screw terminal sockets. FARNELL part no. 151-

785 Length 10mm, Pitch 5mm, Pin diameter 1mm

SK2, SK4

screw terminal

15A, 2.5mm cable screw terminal sockets. FARNELL part no. 151-

786 Length 15mm, Pitch 5mm, Pin diameter 1mm

BNC1, BNC2

BNC connector

Straight square, 1.3mm holes, 10.2mm x 10.2mm

FARNELL part no. 149-453

P1

D-Sub 25 way male

AMP 747238-4 Right angle "D-Sub" 8mm PCB mount,

DigiKey no. 747238-4