MAX4812 [MAXIM]

Fully Assembled and Tested;


型号：	MAX4812
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Fully Assembled and Tested
文件：	总6页 (文件大小：200K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-4300; Rev 0; 10/08

MAX4810 Evaluation Kit

Evluates:0/MAX4812

General Description

Features

The MAX4810 evaluation kit (EV kit) provides a proven

design to evaluate the MAX4810 high-voltage digital

pulser.

o On-Board Charge-Pump Voltage Inverter

o Lead-Free and RoHS Compliant

o Fully Assembled and Tested

The MAX4810 EV kit PCB comes with a MAX4810CTN+

installed. Contact the factory for free samples of the

pin-compatible MAX4811CTN+ or MAX4812CTN+

devices.

Ordering Information

PART

TYPE

Warning: Use caution when using this EV kit due to the

high voltage involved.

MAX4810EVKIT+

EV Kit

+Denotes lead-free and RoHS compliant.

Component List

DESIGNATION QTY

DESCRIPTION

DESIGNATION QTY

DESCRIPTION

4700pF 10%, 250V X7R ceramic

capacitors (0805)

Murata GRM21AR72E472K

220pF 10%, 250V X7R ceramic

capacitors (0603)

Murata GRM188R72E221KW07D

C1–C4

C5, C6

C23, C24

J1–J4

2-pin headers

3-pin headers

2-pin headers

4700pF 10%, 25V X7R ceramic

capacitors (0603)

Murata GRM188R71H472K

JU2, JU4, JU5,

JU6, JU8,

JU10, JU11

0.1μF 10%, 16V X7R ceramic

capacitors (0603)

Murata GRM188R71C104K

C7–C11, C18

C12–C15

C16, C17

C19–C22

JU12–JU16

R1, R2

1kꢀ 5%, 1W chip resistors (2512)

Panasonic ERJ1TYJ102U

0.1μF 10%, 250V X7R ceramic

capacitors (1206)

Murata GRM31CR72E104K

High-voltage digital pulser

(56 TQFN-EP*)

Maxim MAX4810CTN+

10μF 10%, 16V X7R ceramic

capacitors (1206)

Murata GRM31CR71C106K

Charge-pump voltage inverter (8 SO)

Maxim ICL7662CBA+

—

12 Shunts

PCB: MAX4810 Evaluation Kit+

10μF 20%, 160V aluminum

electrolytic capacitors (G13)

Panasonic EEVEB2C100Q

*EP = Exposed pad.

Component Suppliers

SUPPLIER

PHONE

WEBSITE

Murata Electronics North America, Inc.

Panasonic Corp.

770-436-1300

800-344-2112

www.murata-northamerica.com

www.panasonic.com

Note: Indicate that you are using the MAX4810, MAX4811, or MAX4812 when contacting these component suppliers.

________________________________________________________________ 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.

MAX4810 Evaluation Kit

5) Connect the +3.3V power supply to the EV kit VDD

pad and connect the ground of the +3.3V power

supply to the EV kit top GND pad.

Quick Start

Recommended Equipment

Before beginning, the following equipment is needed:

6) Set the electronic load in constant resistance mode

at 100Ω. Connect the electronic load positive termi-

nal to the EV kit OUT1 pad. Connect the electronic

load negative terminal to the EV kit left GND pad.

•

MAX4810 EV kit

One +100V, 200mA power supply

One -100V, 200mA power supply

One +12V, 200mA power supply

One +3.3V, 200mA power supply

One data generator

7) Connect the oscilloscope channel 1 to capture the

INP1 signal (on the EV kit J1 connector).

8) Connect the oscilloscope channel 2 to capture the

INN1 signal (on the EV kit J2 connector).

One electronic load

9) Connect the oscilloscope channel 3 to capture the

OUT1 signal (on the EV kit OUT1 pad).

One 4-channel oscilloscope

10) Set the data generator to generate two outputs.

Each output has three pulses in every pulse repeat-

ing period, as shown in Figure 1. Set the pulse

amplitude to +3.3V. Disable the outputs.

Procedure

The MAX4810 EV kit is fully assembled and tested.

Follow the steps below to verify board operation.

Caution: Do not turn on the power supply or the

electronic load until all connections are completed.

11) Connect the data generator output 1 to the INP1

logic input (on the EV kit J1 connector). Connect

the data generator output 2 to the INN1 logic input

(on the EV kit J2 connector). Connect the ground of

the data generator to the EV kit top GND pad.

1) Verify that the jumpers are in their default positions,

as described in Table 1.

2) Connect the +100V power supply to the EV kit

VPP1 pad and connect the ground of the +100V

power supply to the EV kit left GND pad.

12) Turn on the power supplies.

13) Enable the data generator outputs.

3) Connect the -100V power supply to the EV kit VNN1

pad and connect the ground of the -100V power

supply to the EV kit left GND pad.

14) Verify that the signal on the OUT1 pad is similar to

the waveform shown in Figure 2.

4) Connect the +12V power supply to the EV kit VCC

pad and connect the ground of the +12V power

supply to the EV kit top GND pad.

DATA GENERATOR OUTPUT 1

DATA GENERATOR OUTPUT 2

Evluates:0/MAX4812

f = 5MHz

PRF = 1kHz

Figure 1. Data Generator Outputs

_______________________________________________________________________________________

MAX4810 Evaluation Kit

Evluates:0/MAX4812

+100V

OUT1

-100V

f = 5MHz

PRF = 1kHz

Figure 2. MAX4810 OUT1 Waveform

Power Supplies

The MAX4810 high-side positive power supply is con-

nected to the VPP1 pad or the VPP2 pad. The negative

power supply is connected to the VNN1 pad or the

VNN2 pad. Close JU12 to share VPP1 and VPP2. Close

JU13 to share VNN1 and VNN2.

Detailed Description of

Hardware

The MAX4810 IC generates high-voltage/high-frequen-

cy unipolar or bipolar pulses from low-voltage logic

inputs. These dual pulsers feature independent logic

inputs, independent high-voltage pulser outputs with

active clamps, and independent high-voltage supply

inputs.

The MAX4810 gate drive positive power supply is con-

nected to the VCC pad and the negative power supply

is connected to the VEE pad. Set the shunt on JU11

across pins 2-3 to provide the negative power supply

through the on-board charge-pump voltage inverter, U2

(Maxim ICL7662). When the VCC input voltage is in the

4.5V to 10V range, place a shunt across JU16 pins 1-2.

When VCC is above 10V, leave JU16 open.

The MAX4810 has three logic inputs per channel to

control the positive and negative pulses and active

clamp. Also included are two independent enable

inputs. Disabling EN ensures that the output MOSFETs

are not accidentally turned on during fast power-supply

ramping. This allows for faster ramp times and smaller

delays between pulsing modes. A low-power shutdown

mode reduces power consumption. All digital inputs

are CMOS compatible.

The MAX4810 logic power supply is connected to the

VDD pad.

The same power-supply connections can be made

when evaluating the MAX4811 or MAX4812.

The MAX4810 EV kit has a total of nine logic input sig-

nals. SHDN controls power-up and down of the device.

There are two sets of INP_, INN_, INC_, and EN_ sig-

nals with one for each channel. INP_ controls the on

and off states of the high-side FET, INN_ controls the

on and off states of the low-side FET, INC_ controls the

active clamp, and EN_ controls the gate-to-source

short. These signals give complete control of the output

stage of each driver. See Table 1 for the EV kit jumper

descriptions.

INP_ and INN_ Logic Inputs

Refer to the MAX4810/MAX4811/MAX4812 IC data

sheet for the logic input requirements. INP1 is connect-

ed to header J1, INN1 is connected to header J2, INP2

is connected to header J3, and INN2 is connected to

header J4.

_______________________________________________________________________________________

MAX4810 Evaluation Kit

Table 1. MAX4810 EV Kit Jumper Descriptions

JUMPER

SHUNT POSITION

1-2*

DESCRIPTION

Channel 1 clamp turned on

Channel 1 clamp turned off

Channel 1 output enabled

Channel 1 output disabled

MAX4810 power-up

JU2 (INC1)

2-3

1-2*

JU4 (EN1)

JU5 (SHDN)

JU6 (EN2)

JU8 (INC2)

JU10

2-3

1-2*

2-3

MAX4810 power-down

1-2*

Channel 2 output enabled

Channel 2 output disabled

Channel 2 clamp turned on

Channel 2 clamp turned off

2-3

1-2*

2-3

1-2*

Substrate voltage VSS connected to VNN1

Substrate voltage VSS connected to VNN2

VEE connected to the external power supply

VEE generated by the on-board voltage inverter

VPP2 connected to VPP1

2-3

1-2

JU11

2-3*

1-2*

JU12

Open

1-2*

VPP2 independent of VPP1

VNN2 connected to VNN1

JU13

Open

1-2*

VNN2 independent of VNN1

OUT1 connected to the on-board weak load

OUT1 open

JU14

Open

1-2*

OUT2 connected to the on-board weak load

OUT2 open

JU15

Open

1-2

On-board voltage inverter input is below 10V

On-board voltage inverter input is above 10V

JU16

Open*

*Default position.

Evluates:0/MAX4812

_______________________________________________________________________________________

MAX4810 Evaluation Kit

Evluates:0/MAX4812

Figure 3. MAX4810 EV Kit Schematic

_______________________________________________________________________________________

MAX4810 Evaluation Kit

Figure 4. MAX4810 EV Kit Component Placement Guide—

Component Side

Figure 5. MAX4810 EV Kit PCB Layout—Component Side

Evluates:0/MAX4812

Figure 6. MAX4810 EV Kit PCB Layout—Solder Side

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.

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

is a registered trademark of Maxim Integrated Products, Inc.

MAX4812 [MAXIM]

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