Linear Technology DC1513B Guida rapida alla configurazione

dc1513bf

DEMO MANUAL DC1513B

DESCRIPTION

LTM9004

14-Bit Direct Conversion

Receiver Subsystem

Demonstration circuit 1513 isan evaluation boardfeaturing

Linear Technology Corporation’s LTM

9004 14-bit direct

conversion receiver subsystem. DC1513 demonstrates

good circuit layout techniques and recommended external

circuitry for optimal system performance.

DC1513 comes with Linear Technology’s 14-bit LTM9004

receiver subsystem installed. The board includes out-

put CMOS buffers. DC1513 plugs into the DC890 data

QUICK START PROCEDURE

acquisition demo board and the output can be easily ana-

lyzed with Linear Technology’s PScope™ data processing

software, which is available for no charge on our website at

http://www.linear.com/software.

Design files for this circuit board are available at

http://www.linear.com/demo

Validating the performance of the LTM9004 is simple

with DC1513, and requires only two input sources, a

clock source, a computer, and a lab power supply. Refer

to Figure 1 for proper board evaluation equipment setup

and follow the procedure below:

1. Connect the power supply as shown in Figure 1. There

are onboard low noise voltage regulators that provide

the two supply voltages for the DC1513. The entire

board and all components share a common ground.

The power supply should still be a low noise lab power

supply capable of supplying at least 0.5A at 5VDC, and

1A at 3VDC.

2. Provide an encode clock to the ADC via SMA connec-

tor J7. Use a low-phase-noise clock source such as

a filtered RF signal generator or a high quality clock

oscillator.

NOTE:Similar to having a noisyinput, a highjitter (phase

noise) encode clock will degrade the signal-to-noise

ratio (SNR) of the system.

Table 2. DC1513 Connectors and Jumpers

REFERENCE FUNCTION

J3 (SHDN) Enables/Disables the ADC. Default Is ON.

J4 (MODE) Output Format and Clock Duty Stabilizer Pin.

Default Is VDD.

J5 (SHDN_AMP) Enables/Disables the Amplifiers. Default Is ON.

J6 (LO) Board LO Signal Input. Impedance Matched to

50Ω for Use with Lab Signal Generators.

J7 (CLK) Board Clock Input. Impedance Matched to 50Ω.

Drive with a Low-Phase-Noise Clock Oscillator or

Filtered Sine Wave Signal Source.

J8 (MIXER ENABLE) Enables/Disables the RF Mixer. Default Is ON.

J11 (RF) Board RF Signal Input. Impedance Matched to

50Ω for Use with Lab Signal Generators.

TP1 (SENSE_I) Reference Input to Adjust the Full-Scale Range of

the DC1513, I-Channel. Default Is VDD.

TP2 (GND) DC Ground.

TP4 (GND) DC Ground.

TP5 (3V) DC Supply Input (3VDC).

TP7 (5V) DC Supply Input (5VDC).

TP8 (GND) DC Ground.

TP12 (SENSE_Q) Reference Input to Adjust the Full-Scale Range of

the DC1513, Q-Channel. Default Is VDD.

Table 1. DC1513B Variants

DC1513B VARIANTS RESOLUTION MAXIMUM SAMPLE RATE BASEBAND BANDWIDTH

1513B-AA 14-Bit 125Msps DC - 1.92MHz

1513B-AB 14-Bit 125Msps DC - 4.42MHz

1513B-AC 14-Bit 125Msps DC - 9.42MHz

1513B-AD 14-Bit 125Msps DC - 20MHz

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

is a trademark of Linear Technology Corporation. All other trademarks are the property of their

respective owners.

dc1513bf

DEMO MANUAL DC1513B

QUICK START PROCEDURE

Figure 1. Proper Measurement Equipment Setup

3. Apply an RF input signal to the board. For best results,

use a low distortion, low noise signal generator with

sufficient filtering to avoid degrading the performance

of the receiver.

4. Apply an LO input signal to the board. Note that the

difference in frequency between this signal and the RF

signal will be the IF frequency resulting at the IF filter

and ADC input.

5. ObservetheADCoutputwithdemocircuitDC890B,aUSB

cable, a Windows computer, and Linear Technology’s

PScope data processing software.

POWER SUPPLY

(5V AT 0.5A, 3V AT 1A)

TO DC890

RF SIGNAL GENERATOR

(HP 8644B) OR OTHER

LOW PHASE NOISE

CLOCK SOURCE (e.g. DC1216)

NOTE: EVEN A HIGH QUALITY SIGNAL

SYNTHESIZER WILL STILL HAVE NOISE AND

HARMONICS THAT SHOULD BE ATTENUATED

WITH A LOWPASS OR BANDPASS FILTER. FOR

GOOD QUALITY HIGH ORDER FILTERS, SEE TTE,

LARK ENGINEERING, OR EQUIVALENT.

SIGNAL GENERATOR

HP 8644B OR EQUIVALENT

BPF

SIGNAL GENERATOR

HP 8644B OR EQUIVALENT BPF

dc1513bf

DEMO MANUAL DC1513B

OTHER BOARD CIRCUITRY

Device U1 is an EEPROM device that is used by the PScope

software to identify the board and apply the correct set-

tings for the data collection.

USING PSCOPE SOFTWARE

PScope, downloadable from Linear Technology’s website

http://www.linear.com/, processes data from the DC890

data acquisition board and displays FFT and signal analysis

information on the computer screen.

The onboard EEPROM U1 should enable automatic board

detection and auto configuration of the software, but if the

user wishes to change the settings, they can easily do so.

From the configure menu in the toolbar, uncheck autode-

tect device. The default settings for DC1513 are shown

in Figure 2.

Figure 2. Entering the Correct Device Information for Your ADC.

Select the Correct Parameters for the DC1513. Under Normal

Conditions, PScope Should Automatically Recognize the Board

and Adjust the Software Settings Accordingly.

QUICK START PROCEDURE

dc1513bf

DEMO MANUAL DC1513B

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

DC1513B

1 2 C11, C13 CAP, X7R, 1000pF, 16V, 10%, 0402 AVX 0402YC102KAT

2 13 C2, C6, C24, C25, C27 TO C32,

C34, C35, C36

CAP, 0402 0.1μF 10% 10V X5R AVX 0402ZD104KAT2A

3 2 C20, C23 CAP, X7R, 0.1μF, 16V, 10%, 0603 AVX 0603YC104KAT

4 2 C21, C22 CAP, NPO, 100pF, 50V, 5%, 0402 AVX 04025A101JAT2A

5 7 C3, C8 TO C10, C14, C15, C19 CAP, 0805 4.7μF 20% 25V X7R TAIYO YUDEN TMK212BJ475MG-T

6 0 C1, C4, C5, C12, C16, C18 CAP, 0402, DNI

7 2 C7, C17 CAP, NPO, 10pF, 50V, 5%, 0402 AVX 04025A100JAT2A

8 3 J3, J4, J5 HEADER, 3 × 2 PIN, 2mm SAMTEC TMM-103-02-L-D

9 3 J6, J7, J11 CONN, SMA 50Ω EDGE-LANCH E.F. JOHNSON, 142-0701-851

10 1 J8 HEADER, 3 × 1 PIN, 2mm SAMTEC TMM-103-02-L-S

11 1 J9 HEADER, 2 × 1 PIN, 2mm SAMTEC TMM-102-02-L-S

12 7 JP1 TO JP7 SHUNT SAMTEC, 2SN-BK-G

13 1 L1 FERRITE BEAD, 60Ω, 0603 MURATA BLM18PG600SN1D

14 1 Q1 XSTR, MOSFET, SOT23 DIODES/ZETEX 2N7002-7-F

15 9 R1, R2, R12, R14, R33, R34 RES, 0402 1k 1% 1/16W NIC NRC04F1001TRF

16 2 R36, R37, R42, R10, R15 RES, 0402 33.2Ω 1% 1/16W NIC NRC04F33R2TRF

17 1 R13 RES, 0402 49.9Ω 1% 1/16W NIC NRC04F49R9TRF

18 1 R16 RES, 0805 0Ω JUMPER VISHAY CRCW08050000Z0EA

19 5 R19, R21, R22, R24, R30 RES, 0402 100k 1% 1/16W VISHAY CRCW0402100KFKED

20 1 R20 RES, 0402 75k 1% 1/16W VISHAY CRCW040275K0FKED

21 0 R23, R27, R28 RES, 0402, DNI

22 2 R3, R4 POT, 10k, TOP ADJUSTMENT, THROUGH HOLE BOURNS 3262W-1-103LF

23 1 R39 RES, 0402 10k 1% 1/16W VISHAY CRCW040210K0FKED

24 2 R6, R7 RES, 0402 4.75k 1% 1/16W VISHAY CRCW04024K75FKED

25 8 R8, R11, R17, R18, R25, R26,

R29, R43

RES, 0402 4.99k 1% 1/16W VISHAY CRCW04024K99FKED

26 7 TP1, TP2, TP4, TP5, TP7, TP8,

TP12

TURRET MILL-MAX, 2308-2-00-80-00-00-07-0

27 1 U1 IC, SERIAL EEPROM, TSSOP MICROCHIP 24LC025-I/ST

28 2 U2, U8 IC, LOGIC, INV, UNBUFFERED SC70 FAIRCHILD NC7SVU04P5X

29 4 U3, U4, U5, U7 IC, BUS BUF LVL XLATE CMOS, OCTAL,

DFN 8mm × 4mm

FAIRCHILD FXLH42245MPX

30 1 U6 IC, DFN12, VREG, DUAL, 500MA, 100MA LINEAR TECHNOLOGY LT3024IDE#PBF

31 4 HW, SPACER, NYLON, 0.25" KEYSTONE 8831

DC1513B-AA

1 1 DC1513B GENERAL BOM

2 1 R31 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA

3 0 R32 RES, 0603 DNI

4 0 R5, R9 RES, 0402 DNI

5 1 U9 LTM9004CV-AA LINEAR TECHNOLOGY LTM9004CV-AA#PBF

6 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1513B

dc1513bf

DEMO MANUAL DC1513B

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

DC1513B-AB

1 1 DC1513B GENERAL BOM

2 1 R31 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA

3 0 R32 RES, 0603 DNI

4 0 R5, R9 RES, 0402 DNI

5 1 U9 LTM9004CV-AB LINEAR TECHNOLOGY LTM9004CV-AB#PBF

6 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1513B

DC1513B-AC

1 1 DC1513B GENERAL BOM

2 0 R31 RES, 0603 DNI

3 1 R32 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA

4 2 R5, R9 RES, 0402 7.5k 1% 1/16W VISHAY CRCW04027K50FKED

5 1 U9 LTM9004CV-AC LINEAR TECHNOLOGY LTM9004CV-AC#PBF

6 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1513B

DC1513B-AD

1 1 DC1513B GENERAL BOM

2 0 R31 RES, 0603 DNI

3 1 R32 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA

4 2 R5, R9 RES, 0402 7.5k 1% 1/16W VISHAY CRCW04027K50FKED

5 1 U9 LTM9004CV-AD LINEAR TECHNOLOGY LTM9004CV-AD#PBF

6 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1513B

dc1513bf

DEMO MANUAL DC1513B

SCHEMATIC DIAGRAM

dc1513bf

DEMO MANUAL DC1513B

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

SCHEMATIC DIAGRAM

dc1513bf

DEMO MANUAL DC1513B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

LT 0612 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT

OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims

arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all

appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

X-ON Electronics

Largest Supplier of Electrical and Electronic Components

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