AD7492_技术文档

EvaluationBoardfor12-bithighspeed,

lowpower,successive-approximationADC

a

EVAL-AD7492CB

FEATURES

Interfacing to this board is through a 96-way connector. This

96-way connector is compatible with the EVAL-CONTROL

BRD2 which is also available from Analog Devices. External

sockets are provided for the CONVST input and the VIN

inputs.

Full-Featured Evaluation Board for the AD7492

EVAL-CONTROL BRD2 Compatible

Stand Alone Capability

On-Board Analog Buffering and Reference

Optional On-Board Analog Bias-Up Circuit

VariousLinkingOptions

OPERATING THE AD7492 EVALUATION BOARD

Power Supplies

PC Software for Control and Data Analysis when used

with EVAL-CONTROL BRD2

When using this evaluation board with the EVAL-CON-

TROL BRD2, all supplies are provided from the EVAL-

CONTROL BRD2 through the 96 way connector.

When using the board as a stand alone unit, external supplies

must be provided. This evaluation board has five power

supply inputs: V_DD, A_GND, V_SS, V_DRIVEand D_GND. +5 V must

be connected to the V_DDinput to supply the AV_DDand DV_DD

pins on the AD7492, the AD780 voltage reference, the

positive supply pin of all three op-amps and the digital

control logic. 0 V is connected to the A_GNDinput. -5 V must

be connected to the V_SSinput to supply the negative supply

pins on all three op-amps. The V_DRIVEinput can be used to

provide an external voltage for the output drivers on the

AD7492. If an external V_DRIVEis supplied, it is referenced to

the D_GNDinput which should be tied to 0 V. The supplies are

decoupled to the relevant ground plane with 47µF tantalum

and 0.1µF multilayer ceramic capacitors at the point where

they enter the board. The supply pins of the op-amps and

INTRODUCTION

This Technical Note describes the evaluation board for the

AD7492 12-bit, high speed, low power, internal reference

and clock, successive approximation A/D converter that

operates from a single 2.7 V to 5.25 V supply. Full data on

the AD7492 is available in the AD7492 data sheet available

from Analog Devices and should be consulted in conjunction

with this Technical Note when using the Evaluation Board.

On-board components include an AD780 which is a pin

programmable +2.5 V or +3 V ultra high precision bandgap

reference, two AD797 op-amps used to buffer the analog

input, and an OP07 op-amp used to buffer the DC bias

voltage applied to the optional analog input bias-up circuit.

There are various link options which are explained in detail

on page 2.

FUNCTIONAL BLOCK DIAGRAM

Unipolar

Ain

AD7492 ADC

Buffer

Vin

Data Bus

Bipolar

Ain

Bias-up

buffer

Control Lines

External

Ref Out

Reference

Power Supply Circuit

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

EVAL-AD7492CB

reference are also decoupled to A_GNDwith a 10µF tantalum and a 0.1µF ceramic capacitor. The AD7492 AV_DDsupply pin is

decoupled to A_GNDwith 10uF tantalum and 0.1µF multilayer ceramic capacitors. The AD7492 DV_DDand VDRIVE pins are

decoupled to A_GNDwith 10uF tantalum capacitors and to D_GNDwith 0.1µF multilayer ceramic capacitors.

Extensive ground planes are used on this board to minimize the effect of high frequency noise interference. There are two

ground planes, A_GNDand D_GND

.

These are connected at one location close to the AD7492.

Analog Input Section

The analog input section of this evaluation board accommodates unipolar and bipolar signals. Unipolar signals within the

AD7492 analog input signal range of 0 V - 2.5 V are connected via SK1. They are then buffered by the on-board buffer before

being applied to the VIN pin of the AD7492. Bipolar signals are connected via SK3 and are biased up by the on-board bias-

up buffer circuit before being applied to the VIN pin of the AD7492. The input impedence of the bias-up circuit is 50Ω which

is determined by the value of R7. The input impedence may be modified by removing/changing the value of R7. To obtain

optimum performance from this evaluation board the use of an impedence matched, passive filter is recommended before the

analog signal is applied to the evaluation board. For example, when using a 100KHz input tone, a 100KHz 50Ω filter from

TTE (part number KC5-100K-15K-50/50-720B) is suitable.

R13 Potentiometer (50Kohm)

This variable resistor is used to trim the DC bias voltage applied to the optional analog input bias-up circuit. This bias voltage

is factory preset to 1.25 V which biases a bipolar signal to swing around the midpoint of the analog input range (0 - 2.5 V).

If any adjustment is required, the user can use the histogram window in the eval-board software to analyze the DC voltage

variation while adjusting the trim pot. To view this properly, an analog input signal should not be applied to the board. Under

normal operation this pot should not be adjusted as it is preset for optimum performance.

LINK AND SWITCH OPTIONS

There are 12 link options which must be set for the required operating setup before using the evaluation board. The functions

of these options are outlined below.

Link No.

Function.

LK1

This link is used to select the DC bias voltage to be applied to the optional Vin bias-up circuit.

If the user is using the bias-up circuit, this link must be inserted which will apply the 2.5 V reference voltage

to the bias-up circuit. This causes a bipolar signal (applied to the bipolar vin input socket) to be biased up

around +1.25 V before it is applied to the AD7492 VIN pin. - see also LK10 (below).

When this link is in position "A" the bias-up circuit is supplied by the AD7492 internal reference.

When this link is in position "B" the bias-up circuit is supplied by the AD780 external reference.

If the bias up circuit is not being used this link should be removed.

LK2

This link must be in position "A" if external power supplies are being used. In this position the control logic

is being powered by the voltage applied to the VDD input.

When power is being supplied from the EVAL-CONTROL BRD2, this link can be moved to position "B"

if the user wants to drive the control logic from a separate +5 V which is generated on the EVAL-CONTROL

BRD2.

LK3

LK4

LK5

LK6

LK7

LK8

LK9

This link option selects the sleep mode that the AD7492 can be put into.

When this link is in position "A" the part goes into full sleep when low power operation is selected.

When this link is in position "B" the part goes into partial sleep when low power operation is selected.

This link option selects the source of the CONVST input.

When this link is in position "A" the CONVST input is provided by the EVAL-CONTROL BRD2.

When this link is in position "B" the CONVST input is provided via the external socket, SK2.

This link option selects the source of the RD input.

When this link is in position "A" the RD input is provided by the EVAL-CONTROL BRD2.

When this link is in position "B" the RD input is tied to GND.

This link option selects the source of the CS input.

When this link is in position "A" the CS input is provided by the EVAL-CONTROL BRD2.

When this link is in position "B" the CS input is tied to GND.

This link option sets the voltage applied to the VDRIVE pin on the AD7492.

When this link is in position "A", VDRIVE is connected directly to the DVDD pin.

When this link is in position "B", an external voltage must be applied to the VDRIVE pin Via J3.

This link selects the source of the V_DDsupply.

When this link is in position "A" V_DDmust be supplied from an external source via J2.

When this link is in position "B" V_DDis supplied from the EVAL-CONTROL BRD2.

This link selects the source of the V_SSsupply.

When this link is in position "A" V_SSmust be supplied from an external source via J2.

When this link is in position "B" V_SSis supplied from the EVAL-CONTROL BRD2.

–2–

REV. A

EVAL-AD7492CB

Continued on next page

LK10

This link must be in position "A" if a bipolar AIN signal is being applied to the bipolar Vin socket, SK3.

This link must be in position "B" if a unipolar AIN signal is being applied to the unipolar Vin socket, SK1.

LK11

LK12

This link is used to connect in the impedence matching resistor, R5, for unipolar Vin.

This link is used to connect in the impedence matching resistor, R7, for bipolar Vin.

SET-UP CONDITIONS

Care should be taken before applying power and signals to the evaluation board to ensure that all link positions are as per the

required operating mode. Table I shows the position in which all the links are set when the evaluation board is sent out. All

links are set for use with the EVAL-CONTROL BRD2.

Table I. Initial Link and Switch Positions

Link No.

Position

Function.

LK1

B

Provides DC bias voltage to the analog bias-up circuit using AD780 external reference.

LK2

LK3

LK4

LK5

LK6

LK7

LK8

LK9

LK10

LK11

LK12

B

The digital logic circuitry is powered from the EVAL-CONTROL BRD2.

Part goes into partial sleep mode if low power operation selected.

CONVST signal is provided by the EVAL-CONTROL BRD2 via J1.

RD signal is provided by the EVAL-CONTROL BRD2 via J1.

CS signal is provided by the EVAL-CONTROL BRD2 via J1.

AD7492 VDRIVE pin is connected to the AD7492 DVDD pin.

V_DDis supplied by the EVAL-CONTROL BRD2 via J1.

B

A

B

V_SSis supplied by the EVAL-CONTROL BRD2 via J1.

A

The AD7492 Vin pin is connected to the bipolar Vin.

Inserted

Unipolar Vin impedence matching resistor is connected into circuit.

Bipolar Vin impedence matching resistor is connected into circuit.

–3–

REV. A

EVAL-AD7492CB

EVAL-CONTROL BRD2 INTERFACING

Table II. 96-Way Connector Pin Functions.

Interfacing to the EVAL-CONTROL BRD2 is via a 96-way

connector, J1. The pinout for the J1 connector is shown in

Figure 2 and its pin designations are given in Table II.

ROW A

ROWB

ROWC

1

32

2

D0

A

B

C

3

D1

32

1

4

DGND

D2

DGND

Figure 1. Pin Configuration for the 96-Way

Connector, J1

5

6

D3

96-Way Connector Pin Description

7

D4

D0-D11 Data Bit 0 to Data Bit 11. Three-state TTL

outputs. D11 is the MSB.

8

+5VD

D5

+5VD

C S

9

RD

+5VD

Digital +5 V supply. This can be used to provide

a separate +5 V supply for the digital logic if

required via LK2.

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

D6

D7

RD

Read. This is an active low logic input connected

DGND

D8

DGND

to the RD pin of the AD7492 via LK5.

C S

Chip Select. This is an active low logic input

connected to the CS pin of the AD7492 via LK6.

D9

FL0

IRQ2

Flag zero. This logic input is connected to the

CONVST input of the AD7492 via LK4.

D10

DGND

D11

DGND

FL0

DGND

Interrupt Request 2. This is a logic output and is

connected to the BUSY logic output on the

AD7492.

IRQ2

DGND

AGND

Digital Ground. These lines are connected to

the digital ground plane on the evaluation

board. It allows the user to provide the digital

supply via the connector along with the other

digital signals.

DGND

AGND

DGND

AGND

AVSS

DGND

AGND

Analog Ground. These lines are connected to

the analog ground plane on the evaluation

board.

AV_SS

Negative Supply Voltage. This provides a nega-

tive supply to the on-board op-amps via LK9.

AV_DD

Positive Supply Voltage. This provides a positive

supply to the op-amps, the reference, the AD7492

and the digital logic.

AGND

When interfacing directly to the EVAL-CONTROL BRD2,

all power supplies and control signals are generated by the

EVAL-CONTROL BRD2. However, due to the nature of

the DSP interface on the EVAL-CONTROL BRD2, AD7492

sampling rates greater than 750 KHz are not supported when

interfacing the EVAL-AD7492CB directly to the EVAL-

CONTROL BRD2.

AVSS

AVDD

Note : The unused pins of the 96-way connector are not shown.

–4–

REV. A

EVAL-AD7492CB

SOCKETS

OPERATING WITH THE EVAL-CONTROL BRD2

The evaluation board can be operated in a stand-alone mode

or operated in conjunction with the EVAL-CONTROL

BRD2. This EVAL-CONTROL BRD2 is available from

Analog Devices under the order entry "EVAL-CONTROL

BRD2". When interfacing directly to this control board, all

supplies and control signals to operate the AD7492 are

provided by the EVAL-CONTROL BRD2 when it is run

under control of the AD7492 software which is provided with

the AD7492 evaluation board package. This EVAL-CON-

TROL BRD2 will also operate with all Analog Devices

evaluation boards which end with the letters CB in their title.

There are three input sockets relevant to the operation of the

AD7492 on this evaluation board. The function of these

sockets is outlined in Table III.

Table III. Socket Functions

Socket

Function

SK1

Sub-Miniature BNC Socket for unipolar ana-

log input. Analog inputs in the acceptable

AD7492 analog input range (0 V to REFIN)

are applied to this socket. The signal is then

buffered before it is applied to the AD7492

VIN pin.

The 96-way connector on the EVAL-AD7492CB plugs

directly into the 96-way connector on the EVAL-CON-

TROL BRD2. No power supplies are required in the system.

The EVAL-CONTROL BRD2 generates all the required

supplies for itself and the EVAL-AD7492CB. The EVAL-

CONTROL BRD2 is powered from a 12 V AC transformer.

Suitable transformers are available as an accessory from

Analog Devices under the following part numbers:

SK2

SK3

Sub-Miniature BNC Socket for external

CONVST input.

Sub-Miniature BNC Socket for Bipolar ana-

log input The AD7492 can only accept analog

inputs in the range 0 V to REFIN. Bipolar

analog inputs in the range -1.25 V to +1.25 V

applied to this socket are biased up to the

acceptable AD7492 input range by the on-

board bias-up circuit before being applied to

the AD7492 VIN pin.

EVAL-110VAC-US:

EVAL-220VAC-UK:

EVAL-220VAC-EU:

For use in the U.S. or Japan

For use in the U.K.

For use in Europe

These transformers are also available for other suppliers

including Digikey (U.S.) and Campbell Collins (U.K.).

Connection between the EVAL-CONTROL BRD2 and the

serial port of a PC is via a standard RS-232 cable which is

provided as part the EVAL-CONTROL BRD2 package.

Please refer to the manual which accompanies the EVAL-

CONTROL BRD2 for more details on the EVAL-CON-

TROL BRD2 package.

CONNECTORS

There are three connectors on the AD7492 evaluation board

as outlined in Table IV.

Table IV. Connector Functions

Connector

Function

J1

96-Way Connector for EVAL-CONTROL

BRD2 interface connections.

J2

J3

External VDD, VSS & AGND power connec-

tor.

External VDRIVE & DGND power connec-

tor.

–5–

REV. A

EVAL-AD7492CB

Figure 2. Main Screen

SOFTWARE DESCRIPTION

display the sample number and value of the point directly

beneath the cursor. Along the axis of the graph are the “zoom

handles”. These allow the user to zoom in and out to get a

closer look at a particular sample if required. When another

set of samples is taken the graph will attempt to display all

values collected unless the Hold Zoom check box is ticked.

In this case the graph will keep the same axis settings as for

the previous set of data samples. Additional check boxes are

provided to give the user control over the vertical and

horizontal grids and data points. The lower third of the screen

will show either a Fast Fourier Transform (FFT) of the data

or a Histogram which shows the number of occurrances of

each particular code read back. The FFT (the default option)

is typically used when the user is concerned with examining

an ADC’s performance in the frequency domain while the

Histogram will give an indication of the ADC’s performance

to DC signals. The option displayed can be toggled by

clicking on the FFT Mode/Histogram Mode button in the

top right of the screen. Figure 3 shows how the main screen

looks when the Histogram Option is selected.

The software which controls the Evaluation Board Controller

and hence the evaluation board has three main screens.

The screen shown in Figure 2 shows the screen which appears

when the software is run. The main function of this screen is

to allow the user to read a predetermined number of samples

from the evaluation board and display them in both the time

and frequency domain. The screen can be divided into 3

sections. The upper third of the screen contains the control

buttons, the menu bar and various status windows. The

control buttons allow the user to enter the setup menu, take

samples and get information about the software. The menu

bar allows the user to select which printer port is to be used

to control the Evaluation Board Controller, load and save

data etc. The status windows indicate the setup of the

evaluation board/device, number of samples taken and any

information/error messages that are generated.

The middle third of the screen is a Digital Storage Oscilloscope

(DSO). When samples are uploaded from the Evaluation

Board Controller they are displayed here. The samples can be

displayed either as integer values or as voltages (determined

by the input range of the device inquestion). Once samples

have been displayed clicking at any point in the graph will

–6–

REV. A

EVAL-AD7492CB

Figure 3. Main Screen - Histogram Mode

Setup Screen

been installed should be loaded before the printer port

cable is connected between the Evaluation Board Con-troller

and the PC. This will ensure that the printer port has been

initialized properly. The printer port cable can then be

connected between the PC and the Evaluation Board Con-

troller.

The Setup Screen is responsible for allowing the user to load

a configuration file for the evaluation board. The configura-

tion file will give the software detailed information about the

evaluation board and part connected to the Evaluation Board

Controller such as number of bits, maximum sampling rate,

power supply requirements etc. The configuration file also

tells the software the name of the DSP program file which it

should download to the Evaluation Board Controller. These

files are supplied by Analog Devices with the evaluation

board. Figure 4 shows the Setup Screen.

Running the Software

With the hardware setup the user is now in a position to

use the software to control the Evaluation Board Con-troller

and evaluation board. In the software the user should select

the File menu and click on Setup. This will display the setup

form. A window on the left of the setup form list all the

available configuration files. The con-figuration files are text

based files which contain infor-mation about the particular

evaluation board to be tested. The information will cover

such things as the part name, number of samples to be taken,

default and maximum sampling frequency power supply

settings etc. The configuration file also contains the name of

the DSP program file which is to be downloaded to the

Evaluation Board Controller. The user should select the

relevant configuration file and click Load. The Evaluation

Board Controller will be reset and the DSP program will be

downloaded. When the download has been completed the

SETTING UP THE EVALUATION BOARD CON-

TROLLER

The following text describes how the evaluation board

Evaluation Board Controller and software should be set up

for the user to begin using the complete system. The

Evaluation Board Controller and evaluation board should be

connected together (via the 96 way connector). The power

should be applied to the Evaluation Board Controller. At this

stage the red LED should be flashing which indicates that the

Evaluation Board Controller is functional and ready to

receive instructions. The software which should have

–7–

REV. A

EVAL-AD7492CB

Figure 4. Setup Screen

power supply settings indicated in the configuration file are

set and the user may hear some of the relays clicking. The

pull-down menus items such as number of samples and

sampling frequency will have been set to the default values

specified by the configuration file. The user is free to change

these at will. Once all the settings had been decided the user

can click Close to return to the main form.

Load Raw Data: Selecting this option allows the user to load

data which had been saved by the software during a previous

session.

Save Raw Data: Selecting this option allows the user to save

the current set of sample data points. The data can be

reloaded to the Evaluation Board Controller software at a

later date or can be used by other programs for further

analysis

Taking Samples

When the user clicks Sample the software will instruct the

Evaluation Board Controller to take the required number of

samples at the required frequency from the evaluation board.

These samples are then uploaded and displayed. An FFT and

Histogram are also calculated and displayed. If the user clicks

Cont Samp the software will repeat the process indefinitely

until the user clicks the button again. While the software is

continuously sampling data the other control buttons are

disabled.

Save Binary Data: Selecting this option allows the user to

save the current set of sample data points. The data is saved

in binary format as a text file. This method can be useful for

examining code flicker, looking for stuck bits etc.

Save FFT Data: Selecting this option allows the user to save

the current set of FFT data points. FFT data cannot be

reloaded into the Evaluation Board Controller software but

can be loaded into other software packages for further

analysis.

Other Buttons

Exit: Quits the program.

The Reset button will cause the Evaluation Board Controller

to perform a reset function. When this happens the power

supplies are turned off and the program in DSP memory is

lost. The user should repeat the setup instructions to down-

load another program if required.

Printer Port:

This menu item allows the user to select which printer port

should be used for communication with the Evaluation Board

Controller.

LPT1: This option selects 0x378 as the printer port

address. This is the default option.

LPT2: This option selects 0x278 as the printer port

address.

The Quit button will exit the software, the program running

on the Evaluation Board Controller is not terminated.

PRN: This option selects 0x3BC as the printer port

address.

Help:

This menu item gives information about the current revision

of software for the particular evaluation board being used.

MENU BAR ITEMS

The main screen of the Evaluation Board Controller contains

a number of options available as pull-down menu items. The

functions of these are listed below.

File Menu:

Setup Menu: Selecting this option displays the Setup Screen

as shown in Figure 4.

–8–

REV. A

EVAL-AD7492CB

SOFTWARE CONFIGURATION FILES

Software Configuration Files give the Evaluation Board Controller software information on how the software and

hardware should perform . They contain information such as the name of the DSP program to download, the default and

maximum sample frequencies, the number of samples to take and the power supply settings to use. A typical Software

Configuration File (*.cfg) is shown in Table V.

Table V.: Typical Software Configuration File.

[EVAL-CONTROL BOARD]

partname:AD7492

programname:ad7492.PRG

samplefrequency:100000

maxsamplefrequency:750000

samples:2048

+/-15V:on

dvdd:5:on

avdd:5:on

bus:on

;options 2scomp, binary

dataformat:binary

numberofbits:12

inputVmax:2.5

inputVmin:0

[endofconfig]

Figure 7. AD7492 Evaluation Board Circuit Diagram (ADC Section)

–9–

REV. A

EVAL-AD7492CB

Figure 5. AD7492 Evaluation Board Circuit Diagram

–10–

REV. A

EVAL-AD7492CB

Figure 6. AD7492 Evaluation Board Circuit Diagram

–11–

REV. A

EVAL-AD7492CB

Table VI. AD7492 Evaluation Board Bill Of Materials

Qty. PartType

RefDes

Order Number

Supplier/Manuf

1

2

1

AD7492BRU

AD797BN

U1

AD7492BRU

AD797BN

ADI

U2U3

U4

ADI

OP07DP

ADI

AD780AR

U5

AD780AR

ADI

MM74HC04M

MM74HC08M

U6

ꢀEC379-220

ꢀEC379-224

SD103C

Motorola

U7

SD103C Schottky Diode

D1

10

10uꢀ, 10V (TAJ-B Series)

C1 C3 C9 C11 C13 C15 C17 ꢀEC498-660

C19C23C29

AVX

2

0.1uꢀ 16V X7R (0603 size)

0.1uꢀ 50V X7R (0805 size)

C2C4

ꢀEC499-675

AVX

13

C5 C7 C8 C10 C12 C14 C16 ꢀEC499-687

C18C20-C22C42C38

5

1

6

2

1

0.1uꢀ 50V X7R (0805 size)

0.01uꢀ 50V X7R (0805 size)

27pꢀ 50V NPO (0603 size)

1nꢀ 50V NPO (0805 size)

47uꢀ16V(TAJ-DSeries)

22pꢀ 100V NPO (0805 size)

4.7uꢀ16V (TAJ-B Series)

C28C30C32 C34 C36

ꢀEC499-687

ꢀEC499-225

ꢀEC722-017

ꢀEC317-457

ꢀEC498-762

ꢀEC-317-500

ꢀEC498-725

AVX

Philips

AVX

C24

C25

C27

C6 C31C33C35C40C39

C37C26

C41

1

2

3

1

10Ω ±1% (0603 Size)

1KΩ ±1% (0805 Size)

100Ω ±1% (0805 Size)

51Ω ±1% (0805 Size)

20kΩ ±1% (0805 Size)

130Ω ±1% (0805 Size)

50KΩ Multi-turn trimmer pot

R1

ꢀEC910-995

ꢀEC911-239

ꢀEC911-732

ꢀEC771-181

ꢀEC771-491

ꢀEC771-235

ꢀEC348-144

Multicomp

Bourns

R2R3

R4R8

R5R7

R6 R9 R10

R11

R12

R13

1

220uHInductor(8RHBSeries)

L1

ꢀEC598-215

ꢀEC511-705

TOKO

1

2 pin header

LK1

Harwin

8

4 (2+2) pin header

LK2 LK4 LK5 LK6 LK7 LK8 LK9 LK10

ꢀEC511-791

Harwin

1

3 pin header (SIP3)

LK3

ꢀEC 671-927

Harwin

Berg

10

24

1

Shorting Link

LK1 - LK10

ꢀEC528-456

ꢀEC519-959

ꢀEC269-931

ꢀEC151-786

ꢀEC151-785

ꢀEC727-714

ꢀEC310-682

Ultra Low Profile Sockets

96 Pin 90ºDIN41612 Plug

3 Pin Terminal Block

2 Pin Terminal Block

40 Pin 90º IDC Ribbon Connector

Gold 50Ω SMB Jack

U3 U4 U5

Harwin

Siemens

Lumberg

3M

J1

1

J2

1

J3

1

J4

3

SK1 SK2 SK3

M/ACOM

4

1

Stick-on ꢀeet

PCB

EachCorner

ꢀEC148-922

n/a

3M

EVAL-AD7492CB

–12–

REV. A

EVAL-AD7492CB

Figure 7. Component Side Artwork

Figure 8. Solder Side Artwork

–13–

REV. A

EVAL-AD7492CB

Figure 6. Component Side Artwork

–14–

REV. A


型号：	AD7492
厂家：	ADI
描述：	Evaluation Board for 12-bit high speed, low power, successive-approximation ADC 评估板用于12位高速，低功耗，逐次逼近型ADC
文件：	总14页 (文件大小：722K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AD7492 [ADI]

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