Texas Instruments AMC1210MB-EVM Manual de usuario

User's Guide

SBAU188–February 2012

AMC1210MB-EVM

This user's guide describes the characteristics, operation, and use of the AMC1210MB-EVM as part of an

evaluation system when used with Texas Instruments delta-sigma (ΔΣ) modulator evaluation modules

(EVMs) in resolver or current-shunt applications. A schematic diagram and bill of materials are included in

this document.

The following related documents are available for download through the Texas Instruments web site at

http://www.ti.com.

EVM-Related Device Data Sheets

Device Literature Number Device Literature Number

AMC1210 SBAS372D LM3S3748 SPMS085F

ADS1205 SBAS312B REG104 SBVS025G

TPD2E001 SLLS684E OPA1632 SBOS286B

OPA353 SBOS103 AMC1203EVM SBAU170

AMC1204EVM SBAU178 ADS1209EVM SBAU167

Stellaris is a registered trademark of Texas Instruments.

ARM is a registered trademark of ARM Limited.

Microsoft, Windows are registered trademarks of Microsoft Corporation.

NI-VISA, LabVIEW are trademarks of National Instruments.

All other trademarks are the property of their respective owners.

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Contents

1 EVM Overview ............................................................................................................... 3

2 Hardware Interfaces ........................................................................................................ 3

3 Software ...................................................................................................................... 6

4 Schematics and Layout ................................................................................................... 13

List of Figures

1 AMC1210EVM Software Installation ..................................................................................... 6

2 NI-VISA AMC1210MB-EVM Driver Installation ......................................................................... 7

3 NI-VISA AMC1210MB-EVM Automatic Installation..................................................................... 7

4 NI-VISA AMC1210MB-EVM Driver Installing............................................................................ 8

5 NI-VISA AMC1210MB-EVM Driver Installation Complete............................................................. 8

6 NI-VISA AMC1210MB-EVM Driver Verification......................................................................... 9

7 AMC1210MB-EVM Software Current Shunt Mode GUI ............................................................... 9

8 AMC1210MB-EVM Software Toolbar................................................................................... 10

9 Save Data Interface....................................................................................................... 10

10 AMC1210MB-EVM Software Current Shunt Data GUI............................................................... 10

11 AMC1210MB-EVM Software Resolver Settings GUI ................................................................. 11

12 AMC1210MB-EVM Software Resolver Demo GUI: Position Data.................................................. 12

13 AMC1210MB-EVM Software Resolver Demo GUI: Raw Data ...................................................... 12

14 AMC1210MB-EVM PCB Silkscreen (Top Image)..................................................................... 14

15 AMC1210MB-EVM PCB Silkscreen (Bottom Image) ................................................................. 14

16 Assembly Configuration .................................................................................................. 15

17 Schematic Page 1......................................................................................................... 16

18 Schematic Page 2......................................................................................................... 17

List of Tables

1 AMC1210MB-EVM Modulator Interface Pinout ......................................................................... 3

2 AMC1210MB-EVM Resolver Interface Pinout .......................................................................... 4

3 AMC1210MB-EVM Test Point Interface ................................................................................. 4

4 AMC1210MB-EVM JP1 and JP2 Interface .............................................................................. 5

5 Terminal Block J6 Pinout .................................................................................................. 5

6 LM3S3748 JTAG Connector .............................................................................................. 5

7 Bill of Materials ............................................................................................................ 13

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EVM Overview

1 EVM Overview

1.1 Features

AMC1210MB-EVM:

•Full-featured evaluation board for the AMC1210 quad digital filter for second-order delta-sigma

modulators

•Contains all support circuitry needed for the AMC1210

•Onboard clocking for built-in ADS1205

•Stellaris®LM3S3748 ARM®processor and parallel interface to AMC1210

•JTAG header for reprogramming the LM3S3748 and experimentation

•D-connectors for connecting ΔΣ modulator EVMs

•Easy-to-use evaluation software for computers with Microsoft®Windows®XP operating systems

•Data collection and register access to AMC1210

•Open source firmware and software to customize evaluation

The AMC1210MB-EVM can be connected to a personal or lab computer using an available USB port. This

manual shows how to use the AMC1210MB-EVM with the PC software available for download from the

product folder at www.ti.com.

This manual covers the operation of the AMC1210MB-EVM. Throughout this document, the abbreviation

EVM and the term evaluation module are synonymous with the AMC1210MB-EVM.

2 Hardware Interfaces

2.1 Modulator Interface Pinout

The AMC1210MB-EVM has two, male-type, nine-pin DSUB connectors at J3 and J4 for connecting TI ΔΣ

modulator EVMs. Each connector supports single-channel and dual-channel ΔΣ modulator evaluation

fixtures. The AMC1210MB-EVM supports using one dual-channel modulator or two single-channel

modulator EVMs configured to use different channels of the DB9 connectors. Table 1 summarizes the

AMC1210MB-EVM modulator interface pinout.

Table 1. AMC1210MB-EVM Modulator Interface Pinout

Pin Signal

1 GND

2 Floating

3 3.3 V

4 5 V

5 GND

6 AMC1210 CLK1

7 AMC1210 CLK2

8 AMC1210 IN2

9 AMC1210 IN1

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Hardware Interfaces

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2.2 Resolver Interface Pinout

The AMC1210MB-EVM is designed for easy interfacing to resolver applications. Connector J5 is a

nine-pin, female-type DSUB connector for connection to a standard resolver. To hold the floating resolver

inputs to a predefined common-mode level, a 2.5-V offset is added to the resolver inputs. The

AMC1210MB-EVM resolver interface pinout is detailed in Table 2.

Table 2. AMC1210MB-EVM Resolver Interface Pinout

Pin Signal

1 Positive sine-wave input

2 Negative sine-wave input

3 Positive cosine-wave input

4 Negative cosine-wave input

5 Floating

6 Positive carrier-wave output

7 Negative carrier-wave output

8 Floating

9 GND

2.3 Test Points

The AMC1210MB-EVM provides test points for easy access to onboard supplies for extended evaluation

or experimentation. Table 3 describes each test point.

Table 3. AMC1210MB-EVM Test Point Interface

Test Point Signal

TP1 3.3 V

TP2 GND

TP3 GND

TP4 5 V

TP5 GND

TP6 +VA

TP7 GND

TP8 –VA

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Hardware Interfaces

2.4 Jumpers

JP1 and JP2 are available to configure the resolver carrier signal driver. The carrier signal may either be

driven directly by the AMC1210 or through the OPA1632 operational amplifier. The purpose of the

OPA1632 is to provide the ability to filter the carrier signal and continue to be capable of sourcing 85 mA

on the carrier. This interface is shown in Table 4.

Table 4. AMC1210MB-EVM JP1 and JP2 Interface

Jumper

JP1 JP2 Description

1-2 closed 1-2 closed PWM carrier signal is driven by the OPA1632

2-3 closed 2-3 closed PWM carrier signal is driven directly from the AMC1210

2.5 Power Supplies

If the OPA1632 is in use (JP1 and JP2 in the 2-3 position; refer to Table 4), positive and negative supply

rails must be provided at terminal block J6 or TP6 and TP8. Terminal block J6 connections are described

in Table 5. All other power is supplied through barrel jack J2 with a 5-V to 7-V wall adapter included in the

EVM kit.

Table 5. Terminal Block J6 Pinout

Pin Description

1 OPA1632 positive supply

2 GND

3 OPA1632 negative supply

2.6 LM3S3748 JTAG Connector

For embedded software investigations with the AMC1210MB-EVM, a 20-pin JTAG connector is provided

at J1. The Stellaris LM3S811 Evaluation Board is a low-cost Stellaris evaluation board that can function as

an in-circuit debugger for the LM3S3748 on the AMC1210MB-EVM. The JTAG connector key should face

the inside of the board, or the pins should align as described in Table 6.

Table 6. LM3S3748 JTAG Connector

Pin Signal

2, 4, 6, 8, 10, 12, 14, 16, 18, 20 GND

3, 11, 15, 17, 19 Floating

1 3.3 V or XVCC

5 TDI

7 TMS

9 TCK

13 TDO

SBAU188–February 2012 AMC1210MB-EVM

Software

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3 Software

The program for evaluating the AMC1210MB-EVM is the AMC1210EVM software. This program uses the

NI-VISA™client to communicate with the hardware through a USB port. The program currently runs only

on PCs with the Microsoft Windows XP operating system. Windows Vista and Windows 7 are not

supported.

3.1 Installation

Follow these procedures to install the AMC1210MB-EVM software.

Step 1. Install the AMC1210MB-EVM software and LabVIEW™RunTime Engine software. The

screen shown in Figure 1 appears as you start this process.

Figure 1. AMC1210EVM Software Installation

Step 2. After the AMC1210EVM software is installed, apply power to the EVM and connect the EVM

to an available PC USB port. The computer should recognize new hardware and begin

installing the driver. Accept the default settings.

Figure 2 through Figure 5 show the driver installation sequence.

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Software

Figure 2. NI-VISA AMC1210MB-EVM Driver Installation

Figure 3. NI-VISA AMC1210MB-EVM Automatic Installation

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Figure 4. NI-VISA AMC1210MB-EVM Driver Installing

Figure 5. NI-VISA AMC1210MB-EVM Driver Installation Complete

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Software

Step 3. Verify that installation is completed correctly by opening the Windows Device Manager and

locating the driver, as shown in Figure 6.

Figure 6. NI-VISA AMC1210MB-EVM Driver Verification

3.2 Using the AMC1210MB-EVM Evaluation Software

The AMC1210MB-EVM evaluation software provides two modes of operation: Resolver Demo and Current

Shunt. Each mode of operation provides a separate GUI and features for evaluating the AMC1210. By

default, the software launches in Current Shunt Mode. Figure 7 shows the Current Shunt Mode GUI.

NOTE: Neither mode of operation allows for the AMC1210 Control Register or Clock Divider

that must remain in control of the AMC1210MB-EVM software.

Figure 7. AMC1210MB-EVM Software Current Shunt Mode GUI

SBAU188–February 2012 AMC1210MB-EVM

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The toolbar shown in Figure 8 is present, regardless of the mode of operation of the AMC1210MB-EVM

software. The left-most button is used to switch between Current-Shunt Mode and Resolver Demo Mode.

The remaining buttons are provided for convenience to quickly access information about the device or visit

the TI E2E community for support or device queries.

Figure 8. AMC1210MB-EVM Software Toolbar

The AMC1210MB-EVM software includes a feature that saves any collected data from either the Resolver

or Current Shunt Data tabs to export collected data to another analysis tool. Figure 9 shows the save data

interface. To save collected data, click the folder icon to browse the file system, or type a path where the

exported data will be saved to a text file. Once the data is collected, click the Save Data button to export

the data.

Figure 9. Save Data Interface

With the software in Current Shunt Mode, there are two tabs available: Current Shunt Settings (refer to

Figure 7), and Current Shunt Data, as shown in Figure 10. The Current Shunt Settings tab makes the

control, sinc filter, and integrator filter register settings available for filter modules 1 and 2 on the

AMC1210. Alarm registers and interrupts are not supported by the AMC1210MB-EVM evaluation software.

Figure 10. AMC1210MB-EVM Software Current Shunt Data GUI

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