Texas Instruments ADC1xD1x00CVAL Series Manual de usuario

SNAU212–June 2017

ADC1xD1x00CVAL Board User’s Guide

User's Guide

SNAU212–June 2017

ADC1xD1x00CVAL Board User’s Guide

The ADC1xD1x00QML products are low-power, high-performance 10b and 12b ADCs with sampling rates

up to 1.6 GSPS as a dual-channel ADC or 3.2 GSPS in a single-channel interleaved mode. These

products come in a hermetic 376 column ceramic grid array package (376 CCGA) for harsh environments,

such as down hole or space.

Contents

1 Overview ..................................................................................................................... 2

2 Lab Equipment .............................................................................................................. 3

2.1 Required Lab Equipment .......................................................................................... 3

2.2 Optional Lab Equipment .......................................................................................... 4

3 Driving the Clock and Inputs ............................................................................................... 4

3.1 Driving the Sampling Clock........................................................................................ 4

3.2 Driving the Analog Inputs.......................................................................................... 5

4 Jumper Settings.............................................................................................................. 5

5 Board Power Up ............................................................................................................. 6

5.1 Power Supply ....................................................................................................... 6

5.2 Power-Up Sequence ............................................................................................... 6

5.3 VBG Pin.............................................................................................................. 6

5.4 Samtec Connector ................................................................................................. 7

6 Using the AARDVARK ..................................................................................................... 9

7 Importing Data into WaveVision5 ....................................................................................... 12

List of Figures

1 ADC1xD1x00CVAL Board.................................................................................................. 3

2 Flow-Through Routing for the Samtec Connector....................................................................... 7

3 Samtec Connector Footprint ............................................................................................... 8

4 Samtec Connector Ordering Information ................................................................................. 8

5 Aardvark I2C/SPI Host Adapter ........................................................................................... 9

6 Level Translator for Aardvark to ADC .................................................................................... 9

7 Logic Analyzer Data Listing View ........................................................................................ 12

List of Tables

1 Output Data Rate Per Bank by Mode..................................................................................... 4

2 ADC12D16x0 Output Data Rate Example ............................................................................... 4

3 Control Pins and Function.................................................................................................. 5

4 Non-ECM Pin Control Settings............................................................................................. 6

Trademarks

All trademarks are the property of their respective owners.

CAUTION

Caution Hot surface.

Contact may cause burns.

Do not touch.

Overview

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ADC1xD1x00CVAL Board User’s Guide

1 Overview

The ADC1xD1x00 Evaluation Board (ADC1xD1x00CVAL) provides flexible ADC I/O connections for

laboratory performance evaluation. As configured, the board is equipped with support shrouds for 100 pin

Samtec connectors for interface to a logic analyzer, but capable of being configured for other types of

logic analyzer connectors.

Because the 10- and 12-bit Gig ADCs are pin-compatible with one another, this board can be used with

the following parts:

• ADC10D1000QML

• ADC12D1600QML

• ADC12D1620QML

Refer to the individual product data sheets for information on the absolute maximum ratings and

recommend operating conditions.

NOTE: The top surface of the ADC (U1) can reach temperatures above 55°C during normal

operation. Use caution and avoid touching the top surface of the ADC when it is operating.

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Lab Equipment

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ADC1xD1x00CVAL Board User’s Guide

Figure 1. ADC1xD1x00CVAL Board

2 Lab Equipment

2.1 Required Lab Equipment

The following lab equipment is required to use the ADC1xD1x00 EVAL board:

• Bench supply to drive 1.9 V at 3 A

• 1 signal generator + bandpass filter + balun to drive sampling clock. Suggested equipment:

– SMA100A with B22 enhanced low phase-noise option

– Trilithic 5VF tunable filter

• 1 signal generator to drive the analog input

• High-speed Logic Analyzer to capture the data. Suggested equipment:

– Keysight 16702B Logic Analysis System

– Keysight 16760A Timing and State Module

– Keysight E5379A Differential Probe Adapter

– Keysight E5386A Half-channel Probe Adapter (for data rates greater than 800MSPS)

Lab Equipment

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Three key requirements for the sampling clock signal generator are low distortion, broad band noise, and

phase noise. Even the highest quality signal generator will also produce harmonics, which the ADC

performance is very sensitive to. Therefore, a bandpass filter, which can be tuned to the desired sampling

clock frequency, will improve the performance of the system. In addition to this, the bandpass filter will

reduce broadband noise and increase the system performance.

The logic analyzer should be able to capture differential LVDS signals at high speed, as determined by the

sampling clock speed and ADC Demux Mode. In general, the Output Data Rate per Bank can be

determined as follows:

Table 1. Output Data Rate Per Bank by Mode

MODE OUTPUT DATA RATE PER BANK [MSPS]

DES 1:1 Non-Demux Fs/2

DES 1:2 Demux Fs/4

Non-DES 1:1 Non-Demux Fs

Non-DES 1:2 Demux Fs/2

For example, the ADC12D16x0 will generate data at the following rates:

Table 2. ADC12D16x0 Output Data Rate Example

MODE FCLK [MHz] FS [MSPS] OUTPUT DATA RATE PER BANK

[MSPS]

DES 1:1 Non-Demux 1600 3200 1600

DES 1:2 Demux 1600 3200 800

Non-DES 1:1 Non-Demux 1600 1600 1600

Non-DES 1:2 Demux 1600 1600 800

The EVAL board is designed to be used with the Samtec ASP-65067-01 for the logic analyzer probe

connection to the Keysight E5379A Differential Probe Adapter. There is also a footprint for the Keysight

E5405A Pro Series Soft Touch Connectorless Probe, but this option is not recommended, as the signal

integrity is better through the Samtec connector.

2.2 Optional Lab Equipment

If the EVAL board is being used in Extended Control Mode (ECM), then it is also necessary to have a

system which can write to the SPI. One option is the Aardvark I2C/SPI Host Adapter and accessories.

• Aardvark I2C/SPI Host Adapter

http://www.totalphase.com/products/aardvark_i2cspi/

• Level Shifter Board

http://www.totalphase.com/products/level_shifter/

• 10-pin Split Cable

http://www.totalphase.com/products/split_cable/

3 Driving the Clock and Inputs

3.1 Driving the Sampling Clock

The CLK± SMA inputs are connected directly to the ADC; they must be driven AC-coupled and

differentially. Therefore, a set of DC blocks is required at the input. To convert a single-ended signal to

differential, a National Anaren balun board (400 MHz to 3 GHz) may conveniently be used.

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Driving the Clock and Inputs

SNAU212–June 2017

ADC1xD1x00CVAL Board User’s Guide

3.2 Driving the Analog Inputs

The analog inputs may be driven AC-coupled and must be driven differentially. Depending upon the

application, an amplifier or balun board may be used to achieve single-ended to differential conversion.

4 Jumper Settings

Most of the jumper pins on the EVAL board are also available for customer use, and are more clearly

explained in the datasheet; some exceptions are the TEST pins as described below. These pins are

related to internal test functions and are not available.

The ADC may be used in either Extended Control Mode (ECM) or Non-ECM, also known as pin-control

mode; this is set by the ECEb pin. In ECM, the ADC modes and settings are written through the Serial

Port Interface. Some control pins remain active in ECM.

Table 3. Control Pins and Function

PIN (BOARD) PIN (DATASHEET) I/O FUNCTION

TEST_LP N/A N/A Internal test function; do not connect

ECEB ECEb Input ECM and Non-ECM: Extended

Control Mode Enable bar select

TPN TPM Input Non-ECM only: Test Pattern Mode

select

NDM NDM Input ECM and Non-ECM: Non-Demux

Mode select

TEST_IO N/A N/A Internal test function; do not connect

POR_EN N/A N/A Internal test function; do not connect

DCLK_RST+/- DCLK_RST+/- Input Differential DCLK Reset DES DES

Input Non-ECM only: DES Mode

select

LSPSM LSPSM Input Low sampling power saving mode

DDR_PH DDRPh Input Non-ECM only: DDR Phase select

FSR FSR Input Non-ECM only: Full-Scale Range

select

PDQ PDQ Input ECM and Non-ECM: Power-Down

Q-channel

PDI PDI Input ECM and Non-ECM: Power-Down I-

channel

SCSB SCSb Input SPI: Serial Chip Select bar

SDO SDO Output SPI: Serial Data Out

SDI SDI Input SPI: Serial Data In

SCLK SCLK Input SPI: Serial Clock

TEST_RSV1 N/A N/A Internal test function; do not connect

TEST_RSV2 N/A N/A Internal test function; do not connect

TDIODE TDIODE+/- Output Temperature Sensor Diode

terminals

CALRUN CalRun Output Calibration Running indication

VBG VBG I/O Bandgap Voltage Output / LVDS

Common-mode Voltage select

TEST_CF N/A N/A Internal test function; do not connect

RCLK RCLK+/- Input AutoSync: Reference Clock Input

RCOUT1 RCOut1+/- Output AutoSync: Reference Clock

Differential Output 1

RCOUT2 RCOut2+/- Output AutoSync: Reference Clock

Differential Output 2

In Non-ECM, the following control pins are available.

Board Power Up

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Table 4. Non-ECM Pin Control Settings

PIN (BOARD) LOW HIGH FLOATING

ECEB ECM Non-ECM Not valid

TPN Non-TPM TPM Not valid

NDM 1:2 Demux 1:1 NDM Not valid

DES Non-DES DES Not valid

LSPSM Normal Low sampling power saving Not valid

DDR_PH 0˚Mode 90˚Mode Not valid

FSR See data sheet for details Not valid

PDQ Q-channel active Power-Down Q-channel Not valid

PDI I-channel active Power-Down I-channel Not valid

VBG N/A Higher LVDS common-mode

voltage Lower LVDS common-mode voltage

5 Board Power Up

Refer to the individual product data sheets for information about the absolute maximum ratings and

recommend operating conditions.

5.1 Power Supply

For flexibility, each of the different ADC power supply pins has been brought out to a red PWR terminal. TI

recommends powering all supply pins from a single power-supply source. The supply voltage to any of the

PWR terminals must not exceed that applied to X-1 PWR (VA). The supply voltage is a nominal 1.9 V and

should not exceed 2 V.

5.2 Power-Up Sequence

The ADC should be powered up in Non-ECM, by putting the ECEB pin high. The ADC does not have a

Power-on-Reset. If the part is started in extended control mode (ECM), by having the ECEB pin low, the

registers will come up in an unknown random state, and the part will be in an unknown operating

condition. If ECM mode is desired, the board can be placed in ECM by moving the ECEB pin low after

power up with the ECEB pin high.

After the board has stabilized, the ADC should be calibrated by flipping the red CAL switch from low

(CALb) to high (CAL). If the switch remains high, the part cannot be recalibrated in ECM. To enable the

part to be recalibrated, in either ECM or with the switch, the CAL switch must be low (CALb). Recalibrate

the part when there has been a major change in operating conditions, such as change in Fclk, or

temperature.

5.3 VBG Pin

Some versions of this universal board allow for the option to put the VBG pin low. This not a supported

state, and the VBG pin should not be taken low.

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Board Power Up

SNAU212–June 2017

ADC1xD1x00CVAL Board User’s Guide

5.4 Samtec Connector

Figure 2. Flow-Through Routing for the Samtec Connector

Board Power Up

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5.4.1 Footprint Dimensions

Figure 3. Samtec Connector Footprint

Figure 4. Samtec Connector Ordering Information

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Using the AARDVARK

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ADC1xD1x00CVAL Board User’s Guide

6 Using the AARDVARK

The Aardvark I2C/SPI Host Adapter is a fast and powerful I2C bus and SPI bus host adapter through USB

(see Figure 5). It allows a developer to interface a Linux or Windows PC to a downstream embedded

system environment and transfer serial messages using the I2C and SPI protocols.

Part Number: TP240141

RoHS Compliant: Yes

Figure 5. Aardvark I2C/SPI Host Adapter

For more information, visit the manufacturer website at:

http://www.totalphase.com/products/aardvark_i2cspi/

Level translation is required due to the different signaling levels (3.3 V for the Aardvark vs. 1.9 V for the

ADC). A level shifter can be obtained from Total Phase or can be built as shown Figure 6.

Figure 6. Level Translator for Aardvark to ADC

1. Download the Aardvark control GUI software

(a) Go to: http://www.totalphase.com/products/aardvark_i2cspi/ and select the Downloads tab.

(b) Download and install the Control Center Software.

2. Configure and connect the hardware

(a) Put the ADC into Extended Control Mode (ECM) by setting the ECEB jumper to GND.

Using the AARDVARK

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(b) The I2C/SPI Level Shifter board should have jumpers at TPWR, MASTER, and 1.8 V. (The Gig

ADC runs at 1.9 V, but 1.8 V is appropriately close.)

(d) Connect the Aardvark cable to the I2C/SPI Level Shifter board, ADAPTER input

(e) Connect the additionally supplied ribbon cable from the I2C/SPI Level Shifter board, TARGET1 port

to the ribbon cable with split outputs

(f) Connect the split output wires to the ADC EVAL board

(i) SS (white) = SCSb

(ii) MOSI (grey) = SDI

(iii) SCLK (purple) = SCLK iv. GND (black) = GND

3. Configure the Aardvark software

(a) Select Configure Aardvark Adapter

(b) Select anywhere on the row of the available port, select the SPI – GPIO radio button and hit OK

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