Texas Instruments AMC1210MB-EVM User manual

User's Guide
SBAU188–February 2012
AMC1210MB-EVM
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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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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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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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
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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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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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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
Register to be modified. These registers contain functionally critical features of the device
that must remain in control of the AMC1210MB-EVM software.
Figure 7. AMC1210MB-EVM Software Current Shunt Mode GUI
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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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