Analog Devices EVAL-ADN4651EB1Z Manual de usuario

EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z

User Guide

One Technology Way • P. O. Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: 781.329.4700 •Fax: 781.461.3113 •www.analog.com

Evaluating the ADN4651/ADN4652 5 kV RMS, 600 Mbps LVDS Isolator (SOIC_W)

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS.Rev. A | Page 1 of 13

FEATURES

Isolated ground planes (logic side and bus side)

Convenient connections through SMA terminals

3.3 V or 2.5 V power on Side 1 (VIN1/VDD1) and Side 2

(VIN2/VDD2)

Ground on Side 1 (GND1) and Side 2 (GND2)

LVDS input signals: DIN1+, DIN1−, DIN2+, DIN2−

LVDS output signals: DOUT1+, DOUT1−, DOUT2+, DOUT2−

Jumper-selectable supply power of 3.3 V or 2.5 V

Termination resistors on all LVDS drivers/receivers

EVALUATION KIT CONTENTS

EVAL-ADN4651EB1Z or EVAL-ADN4652EB1Z evaluation board

DOCUMENTS NEEDED

ADN4650/ADN4651/ADN4652 data sheet

EQUIPMENT NEEDED

Signal generator

Oscilloscope

GENERAL DESCRIPTION

The E VA L -ADN4651EB1Z and E VA L-ADN4652EB1Z allow

quick and easy evaluation of the ADN4651/ADN4652 low-voltage

differential signalling (LVDS) isolator without the need for external

components. The ADN4651/ADN4652 employ Analog Devices,

Inc., iCoupler® technology to combine a 2-channel isolator with an

LVDS receiver and driver into a single, 20-lead wide body SOIC

package. They are capable of running at data rates of up to 600

Mbps with very low jitter.

The evaluation board has separate ground and power planes for

each side of the isolator. This separation enables the evaluation

of the ADN4651/ADN4652 with galvanic isolation between both

sides of the device. Jumper-selectable power supplies at 3.3 V or

2.5 V are required on each side of the ADN4651/ADN4652. Using

an on-chip LDO, 2.5 V can be provided from an external 3.3 V

power supply.

Complete information about the ADN4651/ADN4652 is

available in the ADN4650/ADN4651/ADN4652 data sheet,

which should be consulted in conjunction with this user guide

when using the evaluation boards.

UG-900 EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide

Rev. A | Page 2 of 13

TABLE OF CONTENTS

Features .............................................................................................. 1

Evaluation Kit Contents................................................................... 1

Documents Needed.......................................................................... 1

Equipment Needed........................................................................... 1

General Description......................................................................... 1

Revision History ............................................................................... 2

ADN4651 and ADN4652 Evaluation Board Photographs.......... 3

Evaluation Board Configuration .................................................... 4

Setting Up the Evaluation Board.................................................4

Radiated Emissions Test Results (EN 55022) ................................6

Evaluation Board Schematic and Artwork.....................................8

Ordering Information.................................................................... 12

Bill of Materials........................................................................... 12

Related Links............................................................................... 12

REVISION HISTORY

5/16—Rev. 0 to Rev. A

Added the EVAL-ADN4652EB1Z and ADN4652............Universal

Changes to Documents Needed Section ....................................... 1

Added Figure 2; Renumbered Sequentially .................................. 2

Changes to Setting Up the Evaluation Board Section ................. 3

Changes to Figure 5 Caption, Table 2, and Table 3 ...................... 4

Changes to Figure 6 Caption and Radiated Emissions

Test Results (EN 55022) Section..................................................... 6

Added Figure 11 and Figure 12....................................................... 8

Added Table 6; Renumbered Sequentially .................................. 12

Changes to Related Link Section.................................................. 12

12/15—Revision 0: Initial Version

EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide UG-900

Rev. A | Page 3 of 13

EVALUATION BOARD PHOTOGRAPHS

13761-001

Figure 1. EVAL-ADN4651EB1Z Evaluation Board

13761-100

Figure 2. EVAL-ADN4652EB1Z Evaluation Board

UG-900 EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide

Rev. A | Page 4 of 13

EVALUATION BOARD CONFIGURATION

SETTING UP THE EVALUATION BOARD

On the E VA L -ADN4651EB1Z/E VA L -ADN4652EB1Z, power

supplies are configured using Jumpers P4 and P7 (see Table 1)

and connected to the J9 and J10 SMA connectors (see Table 2 and

Table 3). A 3.3 V power supply can be applied to Side 1 and/or

Side 2 of the ADN4651/ADN4652 by removing Jumpers P4

(Side 1) and P7 (Side 2). If a 2.5 V supply is connected to the

board, the relevant jumper must be inserted (P4 for Side 1 and

P7 for Side 2). At 300 MHz with a load resistance of 100 Ω, the

maximum operating current from each power supply is 90 mA.

When using a 3.3 V power supply, VIN1and VDD1 (Pin 1 and Pin 3

on the ADN4651/ADN4652) are bypassed to GND1using 1 µF

capacitors. VIN2 and VDD2 (Pin 20 and Pin 18 on the ADN4651/

ADN4652) are bypassed to GND2using 1 µF capacitors. When

using a 2.5 V power supply, VIN1 or VIN2 is connected directly to

VDD1 or VDD2 by shorting Jumpers P4 or P7, respectively. Both

VDD1 pins are also bypassed to GND1with 0.1 µF capacitors. Both

VDD2 pins are also bypassed to GND2with 0.1 µF capacitors.

An example operation of the EVAL -ADN4651EB1Z is shown in

Figure 5 (signal generator and oscilloscope connections are

reversed for E VA L -ADN4652EB1Z, per Table 2 and Table 3).

SMA connectors expose all LVDS inputs and outputs for the

E VA L-ADN4651EB1Z, but are reversed for the E VA L -

ADN4652EB1Z (see Table 2 and Table 3). Connect a signal

generator to the board using the J1 and J2 connectors and set up

a 300 MHz square wave clock with an amplitude of 350 mV and

an offset of 1.2 V. Connect the oscilloscope directly to the J5

and J6 connectors to perform timing measurements including

propagation delay and skew. Precision measurements, for

example, jitter, using a differential probe requires attaching the

probe at the R7 or R3 resistors and potentially cutting the traces

to the connectors to minimize reflections.

A plot of the oscilloscope connected via the J5 and J6 connectors is

shown in Figure 3. Channel 3 (green) and Channel 4 (purple)

show the J5 and J6 connectors separately (single-ended) with

the differential signal (orange).

Operation of the second isolated LVDS channel is shown in

Figure 4. In contrast to Figure 5, the oscilloscope now connects

via the J3 and J4 connectors and the signal generator connects to

the J7 and J8 connectors. Channel 3 (green) and Channel 4

(purple) show the J3 and J4 connectors separately (single-ended)

with the differential signal (orange).

13761-002

Figure 3. DOUT1− and DOUT1+ with a 300 MHz Clock, Single-Ended and Differential

13761-003

Figure 4. DOUT2−and DOUT2+ with a 300 MHz Clock, Single-Ended and Differential

EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide UG-900

Rev. A | Page 5 of 13

GND1

GND2

DD2

DD1

IN1

IN2

R12 R11 R10

R4R8

J10

J22

J21

EVAL-ADN4651EB1Z

2.5V OR 3.3V

SUPPLY 2.5V OR 3.3V

SUPPLY

OSCILLOSCOPE

SIGNAL

GENERATOR

13761-004

Figure 5. Basic LVDS Isolator Evaluation Board Operation for the EVAL-ADN4651EB1Z; Scope and Signal Generator Reversed for the EVAL-ADN4652EB1Z

Table 1. Jumper Configuration

Jumper Position Description

P4 Open 3.3 V power supply connected to Connector J9 for VIN1

Closed 2.5 V power supply connected to Connector J9, VIN1 shorted to VDD1

P7 Open 3.3 V power supply connected to Connector J9 for VIN2

Closed 2.5 V power supply connected to Connector J9, VIN2 shorted to VDD2

Table 2. Side 1 Connector Descriptions

EVAL-ADN4651EB1Z Connector EVAL-ADN4652EB1Z Connector Description

J9 J9 Power supply, 3.3 V (Jumper P4 open) or 2.5 V (Jumper P4 closed)

J1 J3 DIN1+, noninverted LVDS input for Channel 1

J2 J4 DIN1−, inverted LVDS input for Channel 1

J3 J1 DOUT2+, noninverted LVDS output for Channel 2

OUT2−

, inverted LVDS output for Channel 2

J22

Connects to Connector J21 (test trace for calibration)

J24 J24 Connects to Connector J23 (test trace for calibration)

Table 3. Side 2 Connector Descriptions

EVAL-ADN4651EB1Z Connector EVAL-ADN4652EB1Z Connector Description

J10 J10 Power supply, 3.3 V (Jumper P7 open) or 2.5 V (Jumper P7 closed)

J5 J7 DOUT1+, noninverted LVDS output for Channel 1

J6 J8 DOUT1−, inverted LVDS output for Channel 1

J7 J5 DIN2+, noninverted LVDS input for Channel 2

IN2−

, inverted LVDS input for Channel 2

J21 J21 Connects to Connector J22 (test trace for calibration)

J23 J23 Connects to Connector J24 (test trace for calibration)

UG-900 EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide

Rev. A | Page 6 of 13

RADIATED EMISSIONS TEST RESULTS (EN 55022)

GND1

GND2

DD2

DD1

IN1

IN2

R12 R11 R10

R4 R8

J10

J22

J21

J24 J23

EVAL-ADN4651EB1Z

2 × AA BATTERY

3V TO 3.15V 2 × AA BATTERY

3V TO 3.15V

SIGNAL

GENERATOR 10m COAX CABLE ×2

NOTES

1. SIGNAL GENERATOR OUTSIDE TEST CHAMBER

2. INPUT SIGNAL: |VID| = 300mV, VIC = 1.1V, 600MBPS PRBS7 OR 300MHz CLOCK

13761-105

Figure 6. Test Setup for EN 55022 Radiated Emissions Testing for the EVAL-ADN4651EB1Z;Scope and Signal Generator Reversed for the EVAL-ADN4652EB1Z

Radiated emissions testing is performed with the EVAL-

ADN4651EB1Z and EVAL-ADN4652EB1Z at an independent

external test facility. Evaluating the EVAL-ADN4651EB1Z and

EVAL-ADN4652EB1Z to the EN 55022 standard is undertaken in

a 10 m radiated emissions test chamber, using the test setup

shown in Figure 6. The setup comprises a battery-powered

EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z connected to a

signal generator located outside the chamber via coax cables. As

specified by the EN 55022 standard, both horizontal and vertical

peak scans are undertaken with any visible emissions peaks

investigated using quasi-peak detector measurement. For each

frequency measured using a quasi-peak detector, the unit under

test rotates through 360 degrees to find the worst case angle. The

receiving antenna then elevates from 1 m to 4 m in height to find

the worst case elevation. The worst case quasi-peak measurements

are compared to the EN 55022 Class B and Class A limits.

The test results for EVAL-ADN4651EB1Z and EVAL-

ADN4652EB1Z are shown in Table 4 and a classification report

for both evaluation boards is available on request (please contact

Analog Devices or the distributor for support). Radiated emissions

are measured across 30 MHz to 1 GHz and from 1 GHz to 3 GHz.

With a 600 Mbps PRBS7 input, the EVAL-ADN4651EB1Z/EVAL-

ADN4652EB1Z passes the EN 55022 Class B limits. Plots for

horizontal and vertical peak radiated emissions below 1 GHz are

shown in Figure 7 and Figure 8, respectively, for the EVAL-

ADN4651EB1Z; see the classification report for the EVAL-

ADN4652EB1Z plots.

With a 300 MHz clock input, the EVAL-ADN4651EB1Z/EVAL-

ADN4652EB1Z passes the EN 55022 Class A limits. To pass the

Class B limits when isolating high frequency clocks, reduce the

printed circuit board (PCB) clearance from the 8 mm implemented

on the EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z to, for

example, 2 mm.

Table 4. EN 55022 Radiated Emissions Classification

Test Condition Result

600 Mbps PRBS Passes EN 55022 Class B

300 MHz Clock Passes EN 55022 Class A

EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide UG-900

Rev. A | Page 7 of 13

30 100

FREQUENCY (MHz)

(dBµV/m)

1000

13761-106

Figure 7. EVAL-ADN4651EB1Z Radiated Emissions (Horizontal, Peak, 30 MHz to 1 GHz) with 600 Mbps PRBS7 Input

030 100

FREQUENCY (MHz)

(dBµV/m)

1000

13761-107

Figure 8. EVAL-ADN4651EB1Z Radiated Emissions (Vertical, Peak, 30 MHz to 1 GHz) with 600 Mbps PRBS7 Input

UG-900 EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide

Rev. A | Page 8 of 13

EVALUATION BOARD SCHEMATIC AND ARTWORK

DECOUPLING

100NF

DNP

100NF

100

1UF

10UF

DNP

100NF

1UF

DNP

1UF

10UF

100NF

1UF

DNP

5001 15001 1

DNP

DNP 100

20PIN SOICWB

DNP

100

TP42TP41

TP6

J24

R10

R11

R12

C12

J10

C20

C19

J21

J22

TP1

C11

TP5

C18

C17

TP3

TP2

C10

TP40

VIN1

VIN1 VIN2

VDD2

VDD1

VIN2

1110

AGND1

AGND2

AGND1

AGND2

AGND3

AGND1

13761-005

Figure 9. EVAL-ADN4651EB1Z Schematic

13761-006

Figure 10. EVAL-ADN4651EB1Z Silkscreen

EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide UG-900

Rev. A | Page 9 of 13

DECOUPLING

100NF

100

DNP

100

DNP

100NF

DNI

1UF

10UF

DNP

100NF

1UF

DNP

1UF

10UF

100NF

1UF

DNP

5001 15001 1

100

100 DNI

20PIN SOICWB

DNP

DNI

TP42TP41

TP6

J23

J24

R10

R11

R12

C12

J10

C20

C19

J21

J22

TP1

C11

TP5

C18

C17

TP3

TP2

C10

TP40

VIN1

VIN1 VIN2

VDD2

VDD1

VIN2

1110

AGND1

AGND2

AGND1

AGND2

AGND3

AGND1

13761-101

Figure 11. EVAL-ADN4652EB1Z Schematic

13761-102

Figure 12. EVAL-ADN4652EB1Z Silkscreen

UG-900 EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z User Guide

Rev. A | Page 10 of 13

13761-007

Figure 13. EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z Component Side

13761-008

Figure 14. EVAL-ADN4651EB1Z/EVAL-ADN4652EB1Z Inner Layer 2, Ground

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