National Semiconductor ADC08200 Скачать руководство пользователя страница 6 | Manualshive

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National Semiconductor ADC08200 Скачать руководство пользователя страница 6

Y1

T1

U5

L4

+5V
GND
+5V
-5.2V

J4

POWER CONNECTOR

L2

L3

Q2

Q1

TP6

GND

NATIONAL SEMICONDUCTOR
ADC08200 EVAL BOARD

TP4

DGND

U9

U10

TP7
3VCC

U3

TP3
VRFB

TP1

INPUT

RV2

RV1

TP2

VTFT

U8

U2

U1

NUMEM
JP8

DIV_EN

JP7

TP5

DGND

U7

L1

J3

J3

JP2
MEM

JP1

ADCCLK

JP5
DLY0

JP6
DLY1

J1

TP7

3VCC

J4

POWER

CONNECTOR

RV2

VTFB ADJ

RV1

VTFT ADJ

TP3

VTFB

J3

INPUT BNC

TP2

VTFT

TP7

INPUT

JP8

Detail:

Hard-Wired

Position

JP2, JP7

Detail:

Hard-Wired

Position

JP1

CLK FREQ

SELECT

JP1

Detail:

Default Jumper

Position

Figure 1. Component and Test Point Locations

4.0 Functional Description

4.2 ADC reference circuitry

The ADC08200 Evaluation Board schematic is shown in

Figure 2

.

The provided reference circuitry will provide nominal
reference voltage ranges of 1.3V to 2.5V for VRFT and

0V to 1.3V for VRFB, Providing for nominal input ranges

of 0V to 2.5V peak-to-peak.

4.1 Input (signal conditioning) circuitry

The input signal to be digitized should be applied to BNC
connector J3. This 50 Ohm input is intended to accept a
low-noise  sine  wave  signal  of  1.6V  peak-to-peak
amplitude.  To  accurately  evaluate  the  ADC08200
dynamic  performance,  the  input  test  signal  should  be
passed  through  a  high-quality  bandpass  filter  (60dB
minimum stop-band attenuation) as even the best signal
sources  do  not  provide  a  pure  enough  sine  wave  to
properly evaluate an ADC.

The reference voltages for the ADC08200 can be
monitored at test points TP2 and TP3 and are set with
RV1 and RV2. Signal offset can be provided by adjusting
both of these potentiometers.

4.3 ADC clock circuit

The board is shipped ready to accept an ECL clock
oscillator at a frequency of your choosing and is shipped
without an oscillator in its socket. 200 MHz oscillators are
not readily available, but a suitable 200 MHz oscillator is
available from Pletronics, Inc. as their part number
EC1145ME-200.0MPST.

The  input  to  the  ADC08200  is  a.c.  coupled  through
capacitor  C14.  Resistors  R33A  and  R33B  provide  the
needed  input  bias  to  the  ADC08200.  If  d.c.  coupling  is
desired,  be  sure  that  the  input  signal  remains  within  the
limits set by VRT at TP2 and VRB at TP3.

6

http://www.national.com

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Содержание ADC08200

Страница 1: ... Semiconductor December 2005 Rev 7 Evaluation Board Instruction Manual ADC08200 8 Bit 10 MSPS to 230 Msps Analog to Digital Converter with Internal Sample Hold 2001 2002 2005 National Semiconductor Corporation ...

Страница 2: ... Blank Page ...

Страница 3: ...rd 7 5 1 Software Installation 7 5 2 Setting up the ADC08200 Evaluation Board 7 5 2 1 Board Set up 7 5 2 1 1 Computer Mode Operation 7 5 2 1 2 Manual Mode Operation 8 5 2 2 Quick Check of Analog Functions 8 5 2 3 Quick Check of Software and Computer Interface Operation 8 5 2 4 Getting Consistent Readings 8 5 2 5 Jumper Information 9 5 2 6 Troubleshooting 9 6 0 Evaluation Board Specifications 9 7 0...

Страница 4: ... Blank Page 4 http www national com ...

Страница 5: ...t and running WaveVision software operating under Microsoft Windows Use program WAVEVSN2 EXE available at National Semiconductor s web site 7 Connect a signal of 1 6VP P amplitude from a 50 Ohm source to Analog Input BNC J3 The ADC input signal can be observed at TP1 Because of isolation resistor R32 and the scope probe capacitance the input signal at TP1 will not have the same frequency response ...

Страница 6: ...his 50 Ohm input is intended to accept a low noise sine wave signal of 1 6V peak to peak amplitude To accurately evaluate the ADC08200 dynamic performance the input test signal should be passed through a high quality bandpass filter 60dB minimum stop band attenuation as even the best signal sources do not provide a pure enough sine wave to properly evaluate an ADC The reference voltages for the AD...

Страница 7: ...e ADC08200 is available at the 96 pin Euro connector J1 The series resistors of R35 isolate the ADC from the load circuit to reduce noise coupling into the ADC This evaluation package was designed to be easy and simple to use and to provide a quick and simple way to evaluate the ADC08200 The procedures given here will help you to properly set up the board 4 5 Power Supply Connections 5 2 1 Board S...

Страница 8: ...rity and stability and that the sampling clock signal is extremely stable with minimal jitter 6 Adjust RV2 for a voltage of 0 27V to 0 33V at TP4 7 Adjust the signal source at Analog Input J3 for a signal amplitude of approximately 1 6VP P and check for the presence of that signal at TP1 This completes the testing of the analog portion of the evaluation board 5 2 3 Quick Check of Software and Comp...

Страница 9: ...after turning on power before trying to capture data Be sure positions JP2 JP7 and JP8 are wired Be sure that the Digital Interface Board is connected to a serial printer port and has power Problem Opening Comm Port or Error Setting Comm State errors mean that the comm port selected is not the one to which the eval board is connected Be sure the proper port is selected type ALT O Ascertain that an...

Страница 10: ... R33 not used C12 not used R34 0 R36 not used TP1 INPUT R32 100 C14 1uF R31 100 C11 10pF 1MEM JP6 DELAY1 C32 1uF 5V C34 1uF JP5 DELAY0 C13 1uF J1 96 Pin Female Q4 Q3 Q2 Q1 Q0 FF EF 5 6 7 8 9 10 11 12 13 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 D1 D0 PAF PAE GND REN1 RCLK REN2 OE RS WEN1 WCLK WEN2 LD VCC Q8 Q7 Q6 Q5 30 31 1 2 3 4 D8 D7 D6 D5 D4 D3 D2 Q4 Q3 Q2 Q1 Q0 FF EF 5 6 7 8 9 10 11 12 1...

Страница 11: ...C10H125FN U2B MC10H125FN U2C MC10H125FN U2D MC10H125FN R22 47 R18 47 C6 1uF R27 510 5 2V C1 1uF R20 47 100MHz R21 47 _______ 100MHz T1 T4 6T 19 18 13 12 14 D CC __ CE VCC S Q _ Q R VEE 15 20 17 10 3 4 9 12 8 D CC __ CE VCC S Q _ Q R VEE 7 2 5 10 R14 47 OUT __ IN IN 8 9 7 R26 510 R17 47 JP1 ADCCLk Y1 200MHz 5 2V R11 330 C5 1uF OUT __ IN IN 3 4 5 2 20 R15 47 OUT __ IN IN 13 14 15 R13 330 R12 47 14 8...

Страница 12: ...R52 100 Type 1206 26 2 R33A R33B 100 W Leaded 27 1 R53 130 Type 1206 28 1 R40 220 Type 1206 29 2 R10 R47 240 Type 1206 30 5 R1 R2 R11 R13 R46 330 Type 1206 31 5 R25 R26 R27 R28 R29 510 Type 1206 32 1 R4 1k Type 1206 33 1 R9 2 2k Type 1206 34 5 R24 R37 R39 R41 R44 4 7k Type 1206 35 1 R57 10k Type 1206 36 3 R30 R33 R36 not populated n a 37 1 R35 Resistor Pack 8 x 47 DigiKey 767 163 R47 ND 38 1 R49 R...

Страница 13: ... Connect 1 2 Divide Clock Oscillator Y1 frequency by 2 Connect 2 3 Use Clock Oscillator Y1 frequency without dividing it Default JP2 Jumper Memory Connect 1 2 Use one FIFO chip Connect 2 3 Use both FIFO chips Default hard wired position JP3 thru JP6 Not Used JP7 Jumper Divide Enable Connect 1 2 Use both FIFO chips divide FIFO read signal frequency by 2 Default hard wired position Connect 2 3 Use o...

Страница 14: ... D5 C18 ADC output D6 B19 ADC output D7 C19 ADC output D8 not used ADC output D9 not used ADC output D10 not used ADC output D11 not used GND A1 thru A24 A28 B28 C28 A31 B31 C31 Memory Read Clock B15 Reserved Signal B22 C22 C23 Reserved Power A25 A26 B25 B26 C25 C26 5V Logic Power Supply to Digital Interface Board Reserved Power 5 2V A29 B29 C29 Reserved Power 5V A32 B32 C32 14 http www national c...

Страница 15: ... Blank Page 15 http www national com ...

Страница 16: ...systems are devices or systems which a are intended for surgical implant into the body or b support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user 2 A critical component is any component in a life support device or system whose failure to perfor...

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