19-4423; Rev 0; 1/09
MAX11008 Evaluation Kit/
Evaluation System
General Description
The MAX11008 evaluation kit (EV kit) is an assembled
and tested circuit board that demonstrates the
MAX11008 dual RF LDMOS CODEC smart regulator for
LDMOS FET bias control. Windows
®
98/2000/XP soft-
ware provides a handy user interface to exercise the
features of the MAX11008.
Windows is a registered trademark of Microsoft Corp.
Features
♦
Proven PCB Layout
♦
Complete Evaluation System
♦
Convenient On-Board Test Points
♦
Data-Logging Software
o
Lead(Pb)-Free and RoHS Compliant
♦
Fully Assembled and Tested
Evaluate: MAX11008
Component List
MAX11008EVC16 System Component List
PART
MAX11008EVKIT+
HSI2CMOD
68HC16MODULE-DIP
QTY
1
1
1
DESCRIPTION
MAX11008 EV kit
High-speed
I
2
C
interface module
68HC16 µC module
PART
Ordering Information
TYPE
INTERFACE REQUIREMENTS
User-provided I
2
C interface
Windows PC with RS-232 serial
port
MAX11008EVKIT+
EV Kit
MAX11008EVC16
EV Sys
+Denotes
lead(Pb)-free and RoHS compliant.
Component List (continued)
MAX11008EVKIT Component List
DESIGNATION QTY
C4, C8, C10,
C12, C16, C18,
C26, C27
C5, C9, C11,
C13, C14, C15,
C24, C25, C28,
C29
C6, C7
8
DESCRIPTION
1µF ±20%, 25V X5R ceramic
capacitors (0603)
TDK C1608X5R1E105M
0.1µF ±20%, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104M
Not installed, ceramic capacitors
(0603)
10µF ±20%, 25V X7R ceramic
capacitor (1210)
TDK C3225X7R1E106M
4.7µF ±20%, 6.3V X5R ceramic
capacitor (0603)
TDK C1608X5R0J475M
100pF ±10%, 50V C0G ceramic
capacitors (0603)
TDK C1608C0G1H101K
DESIGNATION QTY
D1, D2
2
DESCRIPTION
npn transistors (3 SOT23)
Fairchild MMBT3904
Top mark: 1A
70Ω, 4A ferrite bead (0603)
Murata BLM1856700N1
20-pin, 2 x 10 right-angle female
receptacle
3-pin jumpers
2-pin jumpers
FETs, n-channel (TO-220AB)
V
DS
= 55V
(High V
DS
--> Low gm)
R
DSON
= 0.024Ω at V
DS
= 10V
I
D
= 29A at +100°C
International Rectifier IRFZ44N
1.00kΩ ±1% resistors (1206)
4.99kΩ ±1% resistors (1206)
FB1
J1
JU0–JU4
JU5–JU20
1
1
5
16
10
0
C17
1
M1, M2
2
C19
1
R1, R2
R3, R9
2
2
C20–C23
4
________________________________________________________________
Maxim Integrated Products
1
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.
MAX11008 Evaluation Kit/
Evaluation System
Evaluate: MAX11008
Component List (continued)
MAX11008EVKIT Component List (continued)
DESIGNATION QTY
R4
R5, R6
R7, R8
R10, R11
R12, R13
R14, R15
U1
1
2
2
2
2
2
1
DESCRIPTION
0Ω resistor (0603)
100Ω ±5% resistors (1206)
1.00Ω ±1% sense resistors (2010)
Vishay (Dale) CRCW20101R00FNEF
0Ω resistors (1206)
10kΩ ±5% resistors (1206)
47Ω ±5% resistors (1206)
Dual RF LDMOS CODEC
(48 TQFN-EP*)
Maxim 11008BETM+
—
—
21
1
DESIGNATION QTY
U2
1
DESCRIPTION
2.5V voltage reference (8 SO)
Maxim MAX6126AASA25+
28V input linear regulator (5 SOT23)
Maxim MAX1615EUK+T
(Top Mark: ABZD)
Shunts
PCB: MAX11008 Evaluation Kit+
U3
1
*EP
= Exposed pad.
Component Suppliers
SUPPLIER
Fairchild Semiconductor
International Rectifier
TDK Corp.
Vishay
PHONE
888-522-5372
310-322-3331
847-803-6100
402-563-6866
www.irf.com
www.component.tdk.com
www.vishay.com
WEBSITE
www.fairchildsemi.com
Note:
Indicate you are using the MAX11008 when contacting these component suppliers.
Quick Start
Required Equipment
•
•
•
•
•
Maxim MAX11008EVC16 (contains MAX11008EVKIT+
board, HSI2CMOD, and 68HC16MODULE-DIP)
DC power supply, 8V at 500mA
DC power supply, 10V at 1000mA
Windows 98/2000/XP computer with a spare serial
(COM) port
9-pin I/O extension cable
2) Carefully connect the boards by aligning the 40-pin
header of the HSI2CMOD with the 40-pin connector of
the 68HC16MODULE-DIP module. Gently press them
together. The two boards should be flush against one
another. Next, connect the MAX11008 EVKIT 20-pin
connector to the HSI2CMOD board.
3) Connect the 8V DC power source to the
68HC16MODULE at the terminal block located next
to the on/off switch, along the top edge of the mod-
ule. Observe the polarity marked on the board.
4) Connect a cable from the computer’s serial port to
the 68HC16MODULE. If using a 9-pin serial port,
use a straight-through, 9-pin female-to-male cable.
If the only available serial port uses a 25-pin con-
nector, a standard 25-pin to 9-pin adapter is
required. The EV kit software checks the modem
status lines (CTS, DSR, DCD) to confirm that the
correct port has been selected.
5) Install the evaluation software on your computer by
launching MAX11008.msi. (The latest software can
be found at
www.maxim-ic.com/evkitsoftware.)
The program files are copied and icons are created
for them in the Windows
Start
menu.
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.
Procedure
The MAX11008 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution:
Do not turn on the power until all connections are
completed.
1) Ensure that the MAX11008EVKIT jumpers are set in
accordance with Table 1.
2
_______________________________________________________________________________________
MAX11008 Evaluation Kit/
Evaluation System
6) Turn on the 8V DC power supply.
7) Start the MAX11008EVKIT program by opening its
icon in the
Start
menu.
8) Click the
Connect
button to establish communica-
tions with the 68HC16MODULE and HSI2CMOD
boards. The program prompts you to connect the
µC module and turn its power on. Slide SW1 to the
ON position. Select the correct serial port, and click
OK. The program automatically downloads its soft-
ware to the module. (During connection, you will be
asked to move the HSI2CMOD rev A board’s
jumper JU5 shunt.)
9) After successful connection, you will be prompted
to read the EEPROM and perform a full reset.
Answer YES to ensure that the software graphical
user interface (GUI) and the working registers
match the initial values stored in the MAX11008’s
nonvolatile EEPROM.
10) Bring up the
ADC / Control
tab.
11) Connect the 10V DC power supply to the
MAX11008EVKIT’s DRAIN1 (+) and SOURCE1 (-),
leaving DRAIN2 and SOURCE2 unconnected.
Note:
The power-supply grounds are connected
through resistor R10.
12) Turn on the 10V DC power supply. FET M1 may
begin drawing current. Adjust the channel 1 VGS
OFFSET control until the drain current is 125mA.
Keep a note of this board calibration value in case
factory defaults must be restored.
13) Check
Force GATE1 off,
and FET M1 stops drawing
current.
14) Connect the 10V DC power supply to DRAIN2 (+)
and SOURCE2 (-). FET M2 may begin drawing cur-
rent. Adjust the channel 2 VGS OFFSET control until
the drain current is 125mA. Keep a note of this
board calibration value in case factory defaults
must be restored.
15) Uncheck
Force GATE1 off.
Both M1 and M2 should
draw 125mA each, compensating for temperature rise.
A board’s jumper JU5 shunt. After successful connec-
tion, you will be prompted to read the EEPROM and
perform a full reset. Answering NO to this prompt
allows complete control of all read and write opera-
tions. Answering YES to the prompt initializes the GUI
by bringing up the
EEPROM
tab, clicking
Refresh,
then bringing up the
ADC / Control
tab and clicking
Full Reset,
and finally in
Working Registers
clicking
Refresh.
Warning:
Writing the UMSG or STRM registers while
the ADC is continuously converting overwrites the con-
tents of the EEPROM with ADC conversion data. The
GUI hides these detailed operations. Refer to source
code files drv11008.cpp and kit11008.asm for imple-
mentation details.
Evaluate: MAX11008
EEPROM Tab (Figure 2)
Clicking the
Refresh
button reads the entire MAX11008
nonvolatile memory into the GUI.
To write a new value to an EEPROM cell, edit its hexa-
decimal value in the grid, either by clicking with the
mouse or by using the arrow keys and function key F2.
A prompt dialog box confirms writing the value and the
register.
The EV kit software uses BUSY hardware handshaking
when performing UMSG (EEPROM block read). The EV
kit does not perform any handshaking when performing
STRM (EEPROM block write), since the communica-
tions data link to the PC is too slow to overflow the
MAX11008’s FIFO.
Restoring Factory Configuration
The MAX11008 EV kit can be restored to its factory-
default EEPROM image by clicking
Load from File
and
choosing file MAX11008EVKIT-EEPROM.txt.
Working Registers Tab (Figure 3)
The GUI remembers the working register values read
from or written to the hardware. Some of the working
registers are write-only, so the GUI cannot always
determine the value.
Clicking the
Refresh
button reads all readable
MAX11008 working registers into the GUI.
To write a new value to a register, edit either its hexa-
decimal value or the individual bits, either by clicking
with the mouse or by using the arrow keys and function
key F2. A prompt dialog box confirms writing the value
and the register.
Working register values are read from the EEPROM at
device power-up, and after performing a full reset. The
Full Reset
button is located on the
ADC / Control
tab.
Detailed Description of Software
The MAX11008 EV kit software GUI is organized into
several tabs.
Hardware Connection Tab (Figure 1)
Individual working registers may be read or written from
this tab. When the software first starts, click the
Connect
button to establish communications with the
68HC16MODULE and HSI2CMOD boards. During con-
nection, you will be asked to move the HSI2CMOD rev
_______________________________________________________________________________________
3
MAX11008 Evaluation Kit/
Evaluation System
Evaluate: MAX11008
Tables Tab (Figure 4)
There are four look-up tables (LUTs) that can be loaded:
TLUT1 and TLUT2 for temperature compensation, and
ALUT1 and ALUT2 for optional additional compensation.
The EV kit software includes an MS-Excel spreadsheet
file MAX11008_LUT_Example.xls, which models how
physical temperature and voltage parameters can be
mapped into the MAX11008’s EEPROM memory. Refer
to the
Temperature/APC Configuration Registers
section
in the MAX11008 IC data sheet for detailed operation of
the look-up tables.
A set of radio buttons selects one of the four LUT con-
figuration registers. After clicking the appropriate radio
button for TLUT1, ALUT1, TLUT2, or ALUT2, the soft-
ware displays configuration values (pointer offset, linear
interpolation, pointer size, table size, and start of table).
After modifying any of these configuration values, click
the
Apply Changes
button to write the new configura-
tion value for the selected table.
To initialize a table, click the radio button selecting the
desired table. Enter the value 0 into the edit field next to
the
Fill with constant
button, then click to fill the table
with zeros. Enter the known correction values into the
table from the
EEPROM
tab, or click
Load from file
to
load the table points from a text file. Finally, click
Interpolate entries that contain zero
to perform linear
interpolation on all zero value table entries. (This opera-
tion is not the same as the MAX11008’s linear interpola-
tion
between
table entries. The GUI software interpola-
tion fills in
missing
table entries.)
The memory map display shows which address range
is assigned to each enabled look-up table. Two or more
look-up tables may be assigned to the same address
range; however, they will contain identical data.
Overlapping table ranges are not recommended.
Keyboard Navigation
When you type on the keyboard, the system must know
which control should receive the keys. Press the Tab
key to move the keyboard’s focus from one control to
the next. The focused control is indicated by a dotted
outline. Shift+Tab moves the focus to the previously
focused control. Buttons respond to the keyboard’s
SPACE bar. Some controls respond to the keyboard’s
UP and DOWN arrow keys. Activate the program’s
menu bar by pressing the F10 key, then press the letter
of the menu item you want. Most menu items have one
letter underlined, indicating their shortcut key.
Detailed Description of Hardware
For the purpose of “table-top” demonstration, two MOSFETS
(M1 and M2) are provided on-board, taking the place of
the LDMOS FETs that would be used in a real application.
Diode-connected BJT transistors D1 and D2 sense the
temperature of each FET while remaining electrically iso-
lated by different PCB copper layers. Capacitors C20 and
C21 filter the external temperature measurements. Gate
drive is lowpass filtered by R14/C28 and R15/C29. Drain
current is measured by Kelvin-connected precision resis-
tors R7 and R8, filtered by R5/C22 and R6/C23. Drain volt-
age is sensed by 6:1 resistor-dividers R9/R1 and R3/R3.
Power is provided from the HSI2CMOD board connect-
ed to J1. The digital supply connects directly to 5V
through jumper JU8. On-board MAX1615 regulator U3
provides the 5V analog supply through jumper JU12.
On-board MAX6126 voltage reference U2 drives both
REFADC and REFDAC through jumpers JU5 and JU6.
The MAX11008 power is bypassed by C4, C5, and
C24–C27.
The complete evaluation system is a three-board set,
with the 68HC16 microcontroller driving the HSI2CMOD
board’s high-speed I
2
C interface core. Refer to the
HSI2CMOD online documentation for details.
Alarms Tab (Figure 5)
The
Alarms
tab configures the ALARM output pin, tem-
perature and current alarm limits, hysteresis, and alarm
behavior.
ADC / Control Tab (Figure 6)
The
ADC / Control
tab configures the system parameters,
reads ADC data, and controls the gate-driver outputs.
4
_______________________________________________________________________________________
MAX11008 Evaluation Kit/
Evaluation System
Evaluate: MAX11008
Table 1. Jumper Settings
JUMPER
JU8
JU12
JU5
JU6
JU7
JU9
JU10
JU11
JU13
JU15
JU14
JU16
JU17
JU18
JU19
JU20
SHUNT POSITION
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
Closed*
Open
DVDD is powered from connector J1
DVDD must be provided by user
AVDD is powered by on-board regulator U3
AVDD must be provided by user
REFDAC = 2.500V from U2
REFDAC = internal 2.5V from U1
REFADC = 2.500V from U2
REFADC = internal 2.5V from U1
Demo circuit RCS1+ connection
Use external user-provided current-sense connection
Demo circuit RCS1- connection
Use external user-provided current-sense connection
Demo circuit ADCIN1 sense M1 V
DRAIN
/4
Use external user-provided ADCIN1 connection
Demo circuit M1 gate connection
Connect to external user-provided FET gate
Demo circuit D1 temperature sensor connection
Connect external user current-sense diode
Demo circuit RCS2+ connection
Use external user-provided current-sense connection
Demo circuit RCS2- connection
Use external user-provided current-sense connection
Demo circuit ADCIN2 sense M2 V
DRAIN
/4
Use external user-provided ADCIN2 connection
Demo circuit M2 gate connection
Connect to external user-provided FET gate
Demo circuit D2 temperature sensor connection
Connect external user current-sense diode
Force OPSAFE1 pin to DGND, normal operation
OPSAFE1 must be driven by a user-provided source
Force OPSAFE2 pin to DGND, normal operation
OPSAFE2 must be driven by a user-provided source
DESCRIPTION
*Default
position.
_______________________________________________________________________________________
5
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