Texas Instruments ADC3EVM Manual de usuario

SLAU579D–June 2014–Revised August 2018

ADC3xxxEVM and ADC3xJxxEVM

User's Guide

SLAU579D–June 2014–Revised August 2018

ADC3xxxEVM and ADC3xJxxEVM

This document is a user’s guide for the ADC3xxxEVM and ADC3xJxxEVM. The EVMs provide a platform

for evaluating the ADC3xxx and ADC3xJxx. The ADC3xxx is a dual-channel or quad-channel, 12-bit or 14-

bit, serial LVDS interface analog-to-digital converter (ADC). The ADC3xxx comes with sampling speed

grades of 25 MSPS, 50 MSPS, 80 MSPS, and 125 MSPS. The ADC3xJxx is a dual-channel or quad-

channel, 12-bit or 14-bit, JESD204B-compliant interface ADC. The ADC3xJxx comes with sampling speed

grades of 50 MSPS, 80 MSPS, 125 MSPS, and 160 MSPS. This family of converters requires only a

single 1.8-V supply, provides flexible input clock dividers, and provides internal features for improved 1/f

(ADC32xx, ADC34xx) and SFDR performance. Throughout this document, the abbreviations EVM and

ADC3xxxx, and the term evaluation module are synonymous with the ADC3xxx EVM and ADC3xJxx EVM,

unless otherwise noted.

Contents

1 Introduction ................................................................................................................... 3

1.1 EVM Block Diagram................................................................................................ 4

1.2 EVM Power Supply................................................................................................. 6

1.3 EVM Connectors and Jumpers ................................................................................... 8

1.4 EVM ADC Input Circuit Configurations......................................................................... 12

1.5 EVM DC-Coupling Configuration ............................................................................... 12

2 Software Control............................................................................................................ 15

2.1 Installation Instructions ........................................................................................... 15

2.2 Software Operation ............................................................................................... 15

3 Basic Test Procedure...................................................................................................... 24

3.1 Test Block Diagram with ADC32xx and ADC34xx............................................................ 24

3.2 Test Set-up Connection .......................................................................................... 25

3.3 ADC32/34xx and TSW1400 Setup Guide...................................................................... 25

3.4 Test Block Diagram with ADC32Jxx and ADC34Jxx ......................................................... 27

3.5 Test Set-up Connection (Onboard LMK04828 Clock)........................................................ 28

3.6 ADC32J/34Jxx and TSW14J56 Setup Guide.................................................................. 29

List of Figures

1 Simplified ADC344x EVM Block Diagram................................................................................ 4

2 Simplified ADC34J4x EVM Block Diagram............................................................................... 5

3 Simplified EVM Power Supply ............................................................................................. 6

4 ADC34Jxx EVM Connector and Jumper Locations..................................................................... 8

5 ADC34xx EVM Connector and Jumper Locations ...................................................................... 9

6 ADC3xxxx ADC Input Circuit Options ................................................................................... 12

7 ADC34xx Clock Input Circuit ............................................................................................. 12

8 ADC32xxVM Input Coupling Configuration Resistors ................................................................ 13

9 ADC3xJxx Input Coupling Configuration Resistors ................................................................... 14

10 Common Tab ............................................................................................................... 16

11 ADC32xx Tab............................................................................................................... 17

12 ADC34xx Tab............................................................................................................... 19

13 ADC32Jxx Tab ............................................................................................................. 21

14 ADC34Jxx Tab ............................................................................................................. 23

15 ADC32xx/ADC34xx and TSW1400 Test Setup Block Diagram...................................................... 24

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16 Select ADC32xx or 34xx in the HSDC Pro GUI Program............................................................. 25

17 ADC3xxx Operating in 14-Bit Mode at 125 MSPS With a 10-MHz Input Signal................................... 26

18 ADC32Jxx/ADC34Jxx and TSW14J56 Test Setup Block Diagram.................................................. 27

19 Select ADC32Jxx or 34Jxx in the HSDC Pro GUI Program.......................................................... 29

20 ADC32Jxx Operating in 14-Bit Mode at 160 MSPS With a 10-MHz Input Signal ................................. 30

List of Tables

1 ADC3xxx Family of Devices and EVMs .................................................................................. 3

2 Power Supply Options ...................................................................................................... 7

3 ADC3xxxx EVM Connectors.............................................................................................. 10

4 ADC3xxxx EVM Jumper Options......................................................................................... 11

5 ADC3xxxx EVM LED Indicators.......................................................................................... 11

6 ADC32xxEVM AC-DC Coupling Resistor Swap ....................................................................... 13

7 ADC3xJxxEVM AC-DC Coupling Resistor Swap ...................................................................... 14

Trademarks

All trademarks are the property of their respective owners.

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Introduction

SLAU579D–June 2014–Revised August 2018

ADC3xxxEVM and ADC3xJxxEVM

1 Introduction

The family of parts and 32 associated EVMs are categorized in Table 1.

Table 1. ADC3xxx Family of Devices and EVMs

Interface Number of Channels ADC Device Number of Bits Maximum MSPS EVM

sLVDS Dual

ADC3221 12 25 ADC3221EVM

ADC3222 12 50 ADC3222EVM

ADC3223 12 80 ADC3223EVM

ADC3224 12 125 ADC3224EVM

ADC3241 14 25 ADC3241EVM

ADC3242 14 50 ADC3242EVM

ADC3243 14 80 ADC3243EVM

ADC3244 14 125 ADC3244EVM

sLVDS Quad

ADC3421 12 25 ADC3421EVM

ADC3422 12 50 ADC3422EVM

ADC3423 12 80 ADC3423EVM

ADC3424 12 125 ADC3424EVM

ADC3441 14 25 ADC3441EVM

ADC3442 14 50 ADC3442EVM

ADC3443 14 80 ADC3443EVM

ADC3444 14 125 ADC3444EVM

JESD204B Dual

ADC32J22 12 50 ADC32J22EVM

ADC32J23 12 80 ADC32J23EVM

ADC32J24 12 125 ADC32J24EVM

ADC32J25 12 160 ADC32J25EVM

ADC32J42 14 50 ADC32J42EVM

ADC32J43 14 80 ADC32J43EVM

ADC32J44 14 125 ADC32J44EVM

ADC32J45 14 160 ADC32J45EVM

JESD204B Quad

ADC34J22 12 50 ADC34J22EVM

ADC34J23 12 80 ADC34J23EVM

ADC34J24 12 125 ADC34J24EVM

ADC34J25 12 160 ADC34J25EVM

ADC34J42 14 50 ADC34J42EVM

ADC34J43 14 80 ADC34J43EVM

ADC34J44 14 125 ADC34J44EVM

ADC34J45 14 160 ADC34J45EVM

There are three package sizes and pinouts for all of these parts. The sLVDS dual devices use a 7-mm ×

7-mm, 48-pin QFN package. The sLVDS quad devices use an 8-mm × 8-mm, 56-pin QFN package. The

dual and quad JESD204B device share the same package using a 7-mm × 7-mm, 48-pin QFN package

The dual ADCs comprise two buffered inputs, two ADC cores, and a common input clock circuit. The quad

ADCs comprise four buffered inputs, four ADC cores, and a common input clock circuit. The sLVDS

versions have a 2-wire interface per ADC (two pairs of p/n signals)—for the dual, this means two sets of 2-

wire interfaces (four p/n pairs), the quad has four sets of 2-wire interfaces (eight p/n pairs). Each of these

2-wire interfaces can be operated in 1-wire mode (14x serialization), or 2-wire mode (7x serialization). For

the 12-bit devices, this equates to 12x and 6x serialization. The JESD204B versions have one lane per

ADC core. For the dual, this means there are two lanes per device, and four lanes per device for the

quad. See the respective device data sheet for more information on sLVDS serialization and JESD204B

lane configurations.

CLK IN

14bit

ADC

14bit

ADC

14bit

ADC

14bit

ADC

Digital

Block

Output

Formatter

DCLK

DAB P/M sLVDS

DCD P/M sLVDS

Power

Supply

Circuits

USB

SPI

USB

ADC34xx

CH A

CH B

CH C

CH D

FCLK

Introduction

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1.1 EVM Block Diagram

Figure 1 and Figure 2 show simplified block diagrams of the default configuration of the EVM. The two or

four analog inputs are supplied to the EVM through a single-ended SMA connection, then transformer

coupled to turn the single-ended signal into a balanced differential signal, and then input to the ADC32xxx

or ADC34xxx. A dual transformer input circuit is used for better phase and amplitude balance of the input

signal than is typically produced by a single transformer input circuit.

Figure 1. Simplified ADC344x EVM Block Diagram

14bit

ADC

14bit

ADC

14bit

ADC

14bit

ADC

Digital

Block

Output

Formatter

SYNC

SERDES Lane 0,1

SERDES Lane 3,4

Power

Supply

Circuits

USB

SPI

USB

ADC34Jxx

CLK IN

CH A

CH B

CH C

CH D

SYSREF

LMK04828

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Introduction

SLAU579D–June 2014–Revised August 2018

ADC3xxxEVM and ADC3xJxxEVM

Figure 2. Simplified ADC34J4x EVM Block Diagram

The clock input is supplied by way of a single-ended signal to an SMA connector, and transformer coupled

to produce a differential clock signal for the ADC32/34xx EVM. For the ADC32J/34Jxx EVM, the clock

input can be generated onboard using the LMK04828.

Power to the ADC3xxx EVM is typically supplied from a 5-V bench supply using the onboard barrel

connector and the provided cable, or from an appropriate 5-V, 3-A minimum power brick. All necessary

voltages for the ADC EVM are derived from the 5-V input connection.

GND

5V TPS62080

TPS7A4700 1.8V To

ADC

4V to Amp

PWR IN

TPS2400

TPS7A4700

Overvoltage

Protection Circuit

DC/DC Converter

Low Noise LDO

ADC32/34xx EVM

GND

5V TPS62080

TPS7A4700 1.8V To

ADC

4V to Amp

PWR IN

TPS2400

TPS7A4700

Overvoltage

Protection Circuit

DC/DC Converter

Low Noise LDO

ADC32J/34Jxx EVM

TPS62080

TPS7A4700 3.3V to

LMK04828

Low Noise LDO

Introduction

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1.2 EVM Power Supply

Figure 3 illustrates the power supply options available on the ADC3xxx EVM. Jumpers are used to choose

the power-supply options, with the default jumper positions indicated by the darker portion of the jumper

that represents the presence of the jumper. See Table 2 for jumper and feedback resistor configuration.

Figure 3. Simplified EVM Power Supply

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Introduction

SLAU579D–June 2014–Revised August 2018

ADC3xxxEVM and ADC3xJxxEVM

Table 2. Power Supply Options

Device Description

ADC32xx

JP6: 1-2, JP7: 1-2 Default connection for LDO 1.8-V supply, switch both to 2-3 to use the switcher U4, install R79 for 1.8-V

switcher output

ADC34xx

JP6: 1-2, JP7: 1-2 Default connection for LDO 1.8-V supply, switch both to 2-3 to use the switcher U4, install R79 for 1.8-V

switcher output

ADC342J/34Jxx

JP9: 1-2, JP10: 1-2 Default connection for LDO 1.8-V supply, switch both to 2-3 to use the switcher U8, install R152 for 1.8-V

switcher output

JP12: 1-2, JP13: 1-2 Default connection for LDO 3.3 V for LMK04828 power and onboard SPI/CPLD, switch both to 2-3 to use

U11 switcher output, install R163 for 3.3-V switcher output

The default power path has an efficient, dual-output, DC/DC switching power supply to first step down the

input supplies from 5 V to 4 V, and 2.8 V for the subsequent low-noise LDOs. The 4 V is used by an LDO

to derive 3.3 V for the LMK04828 clock circuits on the ADC3xJxx EVMs. The 2.8 V is used by an LDO to

derive a 1.8-V supply for the ADC and USB circuits.

The low-noise LDOs can be bypassed to allow the DC/DC power supply to directly provide the ADC

power. Note that the feedback resistors of the DC/DC converter must be adjusted accordingly. See the

respective ADC EVM user's guide schematic for details.

Introduction

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1.3 EVM Connectors and Jumpers

Figure 4 and Figure 5 show the locations of the connectors, jumpers, pushbutton switches, and LEDs.

Figure 4. ADC34Jxx EVM Connector and Jumper Locations

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Introduction

SLAU579D–June 2014–Revised August 2018

ADC3xxxEVM and ADC3xJxxEVM

Figure 5. ADC34xx EVM Connector and Jumper Locations

The EVM has a barrel connector for 5-V power. The SMA connectors connect the ADC input and ADC

clock input to the ADC. Typically, the ADC inputs are transformer-coupled to accept single-ended

connections. The input circuit can be configured to connect to two SMA connectors for differential

signaling, if desired. Table 3 lists the connector information for the ADC3xxxx.

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Table 3. ADC3xxxx EVM Connectors

Device Connector Description

ADC32xx J1 AINP – positive input for A, Ch1 single ended input

J2 AINM – negative input for A, DNI

J3 BINM – negative input for B, DNI

J4 BINP – positive input for B, Ch2 single ended input

J9 CLK_INP – positive CLK input, single ended clock input

J10 CLK_INM – negative CLK input, DNI

J11 SYSREF_INP – positive input for SYSREF frame clock, single ended input

J12 SYSREF_INM – negative SYSREF input, DNI

J13A, B HSMC data connector to TSW1400 evaluation platform

J14 Mini USB connector for SPI control

J15 Power connector for 5-V adapter

ADC34xx J1 AINP – positive input for A, Ch1 single ended input

J2 AINM – negative input for A, DNI

J3 BINM – negative input for B, DNI

J4 BINP – positive input for B, Ch2 single ended input

J5 CINP – positive input for C, Ch3 single ended input

J6 CINM – negative input for C, DNI

J7 DINM – negative input for D, DNI

J8 DINP – positive input for D, Ch4 single ended input

J9 CLK_INP – positive CLK input, single ended clock input

J10 CLK_INM – negative CLK input, DNI

J11 SYSREF_INP – positive input for SYSREF frame clock, single ended input

J12 SYSREF_INM – negative SYSREF input, DNI

J13A, B HSMC data connector to TSW1400 evaluation platform

J14 Mini USB connector for SPI control

J15 Power connector for 5-V adapter

ADC32J/34Jxx J1 AIN_CH-AP – positive input for CHA, single ended input (DNI for ADC32Jxx)

J2 AIN_CH-AM – negative input, (DNI for ADC32Jxx and ADC34Jxx)

J3 BIN_CH-BP – positive input for CHB (CHA input for ADC32Jxx), single ended input

J4 BIN_CH-BM – negative input for CHB (CHA input for ADC32Jxx and ADC34Jxx)

J5 CIN_CH-CP – positive input for CHC (CHB input for ADC32Jxx), single ended input

J6 CIN_CH-CM – negative input for CHC (CHB input for ADC32Jxx and ADC34Jxx)

J7 DIN_CH-DP – positive input for CHD, single ended input (DNI for ADC32Jxx)

J8 DIN_CH-DM – negative input, (DNI for ADC32Jxx and ADC34Jxx)

J9 EXT_ADC_CLK – external ADC clock connection for ADC, if needed

J23 EXT SYSREF+ - external SYSREF connection for ADC, if needed (positive input)

J24 EXT SYSREF– - external SYSREF connection for ADC, if needed (negative input)

J10 LMK_CLKIN – external input clock for LMK use, if needed (for clock distribution mode)

J13 DCLKOUT6P – LMK output test point, positive

J14 DCLKOUT6N – LMK output test point, negative

J15 DCLKOUT7P – LMK output test point, positive

J16 DCLKOUT7N – LMK output test point, positive

J20 5-V input power jack

J18 Mini USB connector for SPI GUI control

J19 CPLD JTAG port

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