MAX97002EVKIT [MAXIM]

MAX97002 Evaluation Kit;


型号：	MAX97002EVKIT
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	MAX97002 Evaluation Kit
文件：	总12页 (文件大小：1316K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-5083; Rev 0; 12/09

MAX97002 Evaluation Kit

General Description

The MAX97002 evaluation kit (EV kit) is a fully assembled

and tested PCB that evaluates the MAX97002 mono

Class D audio power amplifier and stereo Class H

Features

S Proven Audio PCB Layout

S On-Board USB Interface Circuit Generates

I²C-Compatible Signals

DirectDrive headphone amplifier communicating over

S PCB Pads for User-Supplied I²C-Compatible

a 2-wire I²C interface. The EV kit features an on-board

microcontroller for communicating with the I²C interface

of the MAX97002. Pads are provided for accessing the

analog inputs and amplifier outputs.

Signals

S Surface-Mount Components

S Windows 2000-, Windows XP-, and Windows Vista

(32-Bit)-Compatible Software

The MAX97002 EV kit requires a 2.7V to 5.5V supply for

PVDD and a 1.8V supply for VDD.

S Fully Assembled and Tested

Windows 2000-, Windows XP -, and Windows Vista -

compatible software is provided to facilitate configura-

tion. The software controls an on-board microcontroller

over USB, which generates I²C commands.

Ordering Information

PART

TYPE

MAX97002EVKIT+

EV Kit

+Denotes lead(Pb)-free and RoHS compliant.

Component List

DESIGNATION

QTY

DESCRIPTION

DESIGNATION

QTY

DESCRIPTION

C26–C29,

C39–C42

Not installed, ceramic capacitors

(0402)

0.1FF Q10%, 16V X7R ceramic

capacitors (0603)

Murata GRM188R71C104K

C1, C3–C10,

C17

0.1FF Q10%, 16V X7R ceramic

capacitors (0402)

Murata GRM155R71C104K

C31, C33

C43–C47

4.7FF Q10%, 6.3V X5R ceramic

capacitor (0603)

Murata GRM188R60J475K

0.22FF Q10%, 10V X5R ceramic

capacitors (0402)

Murata GRM155R61A224K

10pF Q5%, 50V C0G ceramic

capacitors (0603)

C11, C12

Murata GRM1885C1H100J

Green LED (0603)

GND

Black miniature test point

10FF Q10%, 6.3V X5R ceramic

capacitors (0603)

Murata GRM188R60J106M

C13, C15, C32,

C34

3.5mm stereo phone jack, SMT

(3-position nonswitch)

HPJK

HPL

White miniature test point

Red miniature test point

White RCA jacks (left)

Red RCA jacks (right)

2-pin headers

C14, C16,

C22–C25,

C35–C38

1FF Q 10%, 10V X5R ceramic

capacitors (0402)

Murata GRM155R61A105K

HPR

JINA1, JINB1

JINA2, JINB2

JU1, JU2

22pF Q5%, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H220J

C18, C19

C20

Not installed, inductors

(provided with EV kit)

TOKO A916CY-220M

L1, L2

3300pF Q10%, 50V X7R ceramic

capacitor (0603)

Murata GRM188R71H332K

OUT-, OUT+

1-pin headers

DirectDrive is a registered trademark of Maxim Integrated

Products, Inc.

Windows, Windows XP, and Windows Vista are registered

trademarks of Microsoft Corp.

_______________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX97002 Evaluation Kit

Component List (continued)

DESIGNATION

QTY

DESCRIPTION

DESIGNATION

QTY

DESCRIPTION

USB mini type-B receptacle

connector

93C46 type 3-wire EEPROM

(8 SO)

R1, R10–R13,

R18, R19

UART-to-USB converter

(32 TQFP)

0I Q5% resistors (0402)

220I Q5% resistor (0603)

10kI Q5% resistor (0603)

2.2kI Q5% resistor (0603)

1.5kI Q5% resistor (0603)

27I Q5% resistors (0603)

10I Q1% resistors (0402)

Not installed, resistors (0603)

0I Q5% resistors (0603)

22I Q5% resistors (0402)

3.3V regulator (5 SC70)

Maxim MAX8511EXK33+

(Top Mark: AEI)

R5, R8, R9

R6, R7

R14, R15

R16, R17

R20, R21

R22, R23

2.5V regulator (5 SC70)

Maxim MAX8511EXK25+

(Top Mark: ADV)

16MHz crystal (HCM49)

Hong Kong X'tals

SSM16000N1HK188F0-0

Not installed, multipurpose test

points

6MHz crystal (HCM49)

Hong Kong X'tals

TP1, TP2

SSL60000N1HK188F0-0

Mono Class H speaker with

DirectDrive headphone amplifier

(20 WLP)

USB high-speed A-to-mini B

cable, 2m

—

Maxim MAX97002EWP+

—

Shunts

PCB: MAX97002 EVALUATION

KIT+

32-bit microcontroller

(68 QFN-EP*)

—

Maxim MAXQ2000-RAX+

*EP = Exposed pad.

Component Suppliers

SUPPLIER

PHONE

WEBSITE

Hong Kong X’tals Ltd.

852-35112388

770-436-1300

800-745-8656

www.hongkongcrystal.com

Murata Electronics North America, Inc.

TOKO America, Inc.

www.murata-northamerica.com

www.tokoam.com

Note: Indicate that you are using the MAX97002 when contacting these component suppliers.

______________________________________________________________________________________

MAX97002 Evaluation Kit

4) Verify that a shunt is installed on jumper JU3.

MAX97002 EV Kit Files

5) Connect the USB cable from the PC to the EV kit

board. A New Hardware Found window pops up

when installing the USB driver for the first time.

If a window is not seen that is similar to the one

described above after 30s, remove the USB cable

from the board and reconnect it. Administrator privi-

leges are required to install the USB device driver

on Windows.

FILE

DESCRIPTION

Installs the EV kit files on your

computer

INSTALL.EXE

MAX97000_1_2.EXE

FTD2XX.INF

Application program

USB device driver file

Uninstalls the EV kit software

UNINST.INI

USB_Driver_Help.PDF USB driver installation help file

6) Follow the directions of the Found New Hardware

window to install the USB device driver. Manually

specify the location of the device driver to be

Quick Start

C:\Program Files\MAX97000_1_2 (default instal-

lation directory) using the Browse button. During

device driver installation, Windows may show a

warning message indicating that the device driver

Maxim uses does not contain a digital signature.

This is not an error condition and it is safe to pro-

ceed with installation. Refer to the USB_Driver_

Help.PDF document included with the software for

additional information.

Required Equipment

•ꢀ 5V, 1A DC power supply (PVDD)

•ꢀ 1.8V, 100mA DC power supply (VDD)

•ꢀ Speaker

•ꢀ Headphones

•ꢀ User-supplied Windows 2000, Windows XP, or

Windows Vista PC with a spare USB port

•ꢀ MAX97002 EV kit (cable included)

7) Connect the 5V power supply across the PVDD and

GND pads.

Note: In the following sections, software-related items

are identified by bolding. Text in bold refers to items

directly from the EV kit software. Text in bold and under-

lined refers to items from the Windows operating system.

8) Connect the 1.8V power supply across the VDD and

GND pads.

9) Connect the speaker across the OUT+ and OUT-

test points.

Procedure

The MAX97002 EV kit is fully assembled and tested.

Follow the steps below to verify board operation:

10) Connect the headphones to HPJK.

11) Enable the power supplies.

1) Visit www.maxim-ic.com/evkitsoftware to down-

load the latest version of the EV kit software,

MAX97000_1_2xx.ZIP. Save the EV kit software to a

temporary folder and uncompress the ZIP file.

12) Start the MAX97002 EV kit software by selecting its

icon in the Start | Programs menu.

13) Observe as the program automatically detects the

address of the MAX97002 and starts the main pro-

gram.

2) Install the EV kit software on the computer by run-

ning the INSTALL.EXE program inside the tempo-

rary folder.

14) The MAX97002 is now ready for evaluation.

3) Verify that shunts are installed on jumpers JU1 and

JU2. This configures the I²C inputs to receive sig-

nals from the USB interface circuitry.

_______________________________________________________________________________________

MAX97002 Evaluation Kit

The MAX97002 EV kit software Main Control tab

(Figure 1) divides the EV kit functions into logical blocks.

The MAX97002 EV kit software Registers tab (Figure 2)

displays each register’s individual bit logic-level status.

A data bit in bold indicates a logic-high, while a non-

bolded data bit indicates a logic-low. Clicking on the

individual data bit toggles the bit and performs a write

command. The new command is shown in the edit box

at the right. Write commands can be written to the reg-

isters alternatively by typing a hex value in the edit box

and pressing Enter on the keyboard.

Detailed Description of Software

Note: Text in bold refers to items in the EV kit software.

Graphical User Interface (GUI)

The MAX97002 EV kit software GUI (Figures 1 and

2) provides a convenient way to test the features of

the MAX97002. Figure 1 shows the MAX97002 EV kit

software’s Main Control tab, while Figure 2 shows the

Registers tab. Actions on the two tabs generate I²C

commands to update the MAX97002 internal memory

registers.

Figure 1. MAX97002 Evaluation Kit Software (Main Control Tab)

______________________________________________________________________________________

MAX97002 Evaluation Kit

Figure 2. MAX97002 Evaluation Kit Software (Registers Tab)

_______________________________________________________________________________________

MAX97002 Evaluation Kit

(unchecked), the ZCD forces all volume adjustment to

be made when the output signal is crossing zero, thus

reducing audio clicks during volume changes.

Software Startup

Upon starting the program, the MAX97002 EV kit software

automatically searches for the USB interface circuit and

then for the MAX97002 device address. The MAX97002

EV kit enters the normal operating mode when the

USB connection is detected and has found the device

address. If the USB connection is not detected, the soft-

ware prompts the user to retry or enter the demo mode.

Input Gain

The MAX97002 EV kit software’s Input Gain group box

selects the input channel preamp gain for the MAX97002.

The MAX97002 input channel preamp gain is selectable

among -6dB, -3dB, 0dB, +3dB, +6dB, +9dB, and +18dB.

Demo Mode

The MAX97002 EV kit software enters the demo mode

when the USB connection is not detected, or by select-

ing the Options | Demo Mode menu item in the main

window. When in demo mode, all software communica-

tion to the EV kit circuit is disabled; however, most of the

software GUI is functional. Demo mode allows the user

to evaluate the software without hardware connectivity.

If the USB cable is connected to the EV kit, but power

is not applied to PVDD, the EV kit GUI acts like it is in

demo mode. In such a case, the EV kit is connected to

the PC through USB and I²C commands can be sent to

the MAX97002, but without power, the MAX97002 does

not acknowledge the I²C commands. When power is

applied, press the Reset button to detect the presence

of the MAX97002.

Charge Pump

The MAX97002 features an internal charge pump for

Maxim’s Class H DirectDrive architecture. The charge

pump can operate in two modes, fixed mode and high-

efficiency mode. By default, the MAX97002 charge pump

operates in high-efficiency mode. High-efficiency mode

on the charge pump dynamically changes the internal

supply rails. To have fixed internal supply rails, check the

Fixed Mode checkbox in the Charge Pump group box.

Within fixed mode, there are two options for the supply

rails shown in the drop-down list, 1.8V and 0.9V.

Distortion Limiter

The distortion limiter limits distortion based on the defined

THD level and has programmable release time.

Switch Enable

The MAX97002 features an internal switch that can bypass

the Class D amplifier and allow an external amplifier to

power the same speaker connected to the MAX97002 EV

kit without requiring external switches. Connect the exter-

nal amplifier output to COM1 and COM2, and enable in

the software by checking the Switch Closed checkbox

in the Analog Switch group box.

Write All/Read All/Reset

The Write All button writes the current settings to all of

the registers on the GUI. The EV kit software GUI per-

forms I²C write commands as changes occur on the GUI.

The Read All button changes the GUI settings to match

the MAX97002 register settings. To change settings one

time, enter demo mode by selecting the Options | Demo

Mode menu item, change the GUI to the required settings,

exit demo mode by selecting Options | Demo Mode, and

then press the Write All button. If further changes are not

required, enter demo mode to disable communication to

the MAX97002. To obtain the MAX97002 settings, exit

demo mode and press the Read All button. The Reset

button clears the EV kit software GUI and reprograms the

MAX97002 to default values.

Low-Power Mode

The MAX97002’s low-power mode minimizes current con-

sumption when only using the headphone amplifier. Low-

power mode transmits a single-ended audio signal to the

headphone amplifier from either INA or INB, or a differ-

ential signal from INA and INB. Low-power mode can be

enabled by selecting LP Mode from the drop-down list.

The volume control and mixer are bypassed in this mode.

MAX97002 Master Controls

The EV kit software’s MAX97002 Master Controls group

box contains ENABLE, Volume Slew Disable, and Zero

Crossing Detection Disable checkboxes. The ENABLE

checkbox, which is also called the software shutdown,

enables or disables the MAX97002. The Volume Slew

Disable checkbox, when checked, disables the volume

slewing. The Zero Crossing Detection Disable check-

box disables the zero-crossing detection (ZCD) during a

volume change operation when checked. When enabled

Mixer

The speaker, left headphone, and right headphone

each have an independent mixer. The MAX97002 EV kit

accepts a pair of single-ended audio inputs for stereo

operation, or a pair of differential audio inputs for mono

operation. The single-ended input signals for the speaker

and headphones are defined as IN_1 (left) and IN_2

(right). In the Input Configuration group box, select

Stereo (S/E) for single-ended stereo operation or Mono

______________________________________________________________________________________

MAX97002 Evaluation Kit

(DIF) for differential mono operation. Depending on the

selection, the speaker and headphone mixers provide

options for selecting the audio source for the SPKR

Mixer, Left HP Mixer, and Right HP Mixer.

volume, respectively, to between -64dB (min) to +6dB

(max). Alternatively, the user can enter a numerical

value inside the Left Headphone Volume and Right

Headphone Volume edit boxes.

Speaker Amplifier

The MAX97002 EV kit software’s Speaker Amplifier

group box contains the speaker mixer, speaker volume,

and speaker-enable control. Check the Speaker Enable

checkbox to enable the speaker amplifier. The Speaker

Volume track bar sets the speaker volume between

-30dB (min) to +20dB (max). Alternatively, the user can

enter a numerical value inside the Speaker Volume edit

box.

I²C Interface Indicator

The MAX97002 EV kit software Interface group box dis-

plays the MAX97002’s I2C Device Address, Register

Address, and the last Data Sent. The MAX97002 I²C

device address is internally set to 0x9A.

Simple I²C Commands

There are three methods for communicating with

the MAX97002 EV kit, through the Main Control tab

(Figure 1), the Registers tab (Figure 2), or by using low-

level SMBusK commands available in the Advanced

User Interface window (Figure 3). Select the Options

| Interface (Advanced User Interface) menu item to

display the Advanced User Interface window that

allows I²C operations, such as SMBusReadByte and

SMBusWriteByte.

Headphone Amplifier

The Headphone Amplifier group box enables or dis-

ables the headphone outputs. The Left Headphone

Volume and Right Headphone Volume track bars

set the headphone volume. The Left HP Enable and

Right HP Enable checkboxes enable the headphone

amplifiers.

The Left Headphone Volume and Right Headphone

Volume track bars set the left and right headphone

Figure 3. Advanced User Interface Window (2-Wire Interface Tab Sheet)

SMBus is a trademark of Intel Corp.

_______________________________________________________________________________________

MAX97002 Evaluation Kit

Filtered Output

Audio analyzers typically cannot accept pulse-width-

modulated (PWM) signals at their inputs. Therefore, the

MAX97002 EV kit includes a pair of lowpass filters at

the output to ease evaluation. To use the filtering output

pads (FOUT+/FOUT-), install inductors L1 and L2 (pro-

vided with the EV kit), connect the load between FOUT+

and FOUT-, and connect the filtered output to the audio

analyzer. The lowpass filters at the speaker outputs are

optimized for an 8I speaker.

Detailed Description of Hardware

The MAX97002 EV kit evaluates the MAX97002 Class D

audio amplifier and stereo DirectDrive headphone ampli-

fier that communicate over I²C. The EV kit demonstrates

the MAX97002 features, such as user-defined input con-

figuration, input gain, input source, output enable, and

volume control.

The MAX97002 EV kit uses the MAX97002 IC in a

20-bump WLP (2mm x 2mm) package on a proven four-

layer PCB design. The EV kit operates from a 2.7V to

5.5V supply for PVDD and a 1.8V supply for VDD.

Table 1. MAX97002 Jumper Table

Filterless Output

The MAX97002 EV kit filterless outputs (OUT+/OUT-)

can be connected directly to a speaker load without

any filtering. Use the OUT+/OUT- test points to connect

the speaker directly to the MAX97002 outputs using a

twisted-pair cable. Do not install inductors L1 and L2 for

maximum efficiency.

SHUNT

POSITION

JUMPER

DESCRIPTION

On-board I²C (connects on-

board SCL signal to the SCL

pad)

Closed*

JU1

User-supplied I²C (open the

jumper and apply the SCL sig-

nal to the SCL pad)

Open

Closed*

Open

On-board I²C (connects on-

board SDA signal to the SDA

pad)

JU2

User-supplied I²C (open the

jumper and apply the SDA sig-

nal to the SDA pad)

*Default position.

______________________________________________________________________________________

MAX97002 Evaluation Kit

Figure 4a. MAX97002 EV Kit Schematic (Sheet 1 of 2)

_______________________________________________________________________________________

MAX97002 Evaluation Kit

Figure 4b. MAX97002 EV Kit Schematic (Sheet 2 of 2)

10 _____________________________________________________________________________________

MAX97002 Evaluation Kit

1.0’’

Figure 6. MAX97002 EV Kit PCB Layout—Component Side

Figure 5. MAX97002 EV Kit Component Placement Guide—

Component Side

1.0’’

Figure 7. MAX97002 EV Kit PCB Layout—GND Layer 2

______________________________________________________________________________________ 11

MAX97002 Evaluation Kit

1.0’’

Figure 9. MAX97002 EV Kit PCB Layout—Solder Side

Figure 8. MAX97002 EV Kit PCB Layout—Power Layer 3

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.

Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

MAX97002EVKIT [MAXIM]

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