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Mini DS203 OSC ManualCopyright reserved by elechouse

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Intro

DS203 V2.6 is a pocket size 4 channel digital Oscilloscope for common electronic engineering tasks. It's based

on ARM cortex M3 (STM32F103VCT6) 32 bits platform, providing 72MS/s sampling rate with integrated

FPGA and high speed ADC. Internal 2MB USB disk could be used to store waveform, user application and

upgrade firmware. Due to the palm size and handy performance, it fits in-field diagnosis, quick measurement,

hobbyist projects and wherever convenience matters. Scheme and source files are also open for re-innovating.

Features

Portable and lightweight

Color display

Waveform storage and playback

Two 72MS/s analog channels, plus two digital channels

Firmware upgradable

4 programmable space for user application program

Open Source

Specification

Display Full Color 3" TFT LCD 400 X 240

Input channel Analog: CH(A)\CH(B)

Digital: CH(C)\CH(D)

Max sample rate 72MS/s, 8bit

Sample memory depth 4096 Points for each channel

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Storage Internal 2MB USB disk, BM P, DAT file

Auto measure Max, Min, Vbt, FPS, Vpp, Vdc, RMS

Sampling mode Real time

Dimension 98 * 60 * 14.5 (mm)

Weight 80g (without battery)

Accessories within Pack 2 mcx oscilloscope probe/battery

Basic Operation

Install the battery

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1. Push the back cover toward the Mini USB port direction.

2. Lift the back cover

3. Install the battery

Operation Overview

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Buttons

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There are 2 navigators and 4 buttons on DS203

Navigator A

The Navigator A is used to select/change the submenu of menu. Action "Press" Navigate in the sub-menus,

While Action "Pull/ Push" changes the setting of a sub-menu (ref. menu).

For example, when selecting the menu: CHA Control, with Navigator B (ref. Navigator B), Action "Pull/ Push"

of Navigator A changes the setting of sub-menu1, from "CH (A)"to "HIDE". While action "Press" changes

selected sub-menu, making the blink area jump to next item: DC (or AC), Still, Action "Pull/ Push" changes the

setting of this sub-menu.

Action "Press" of Navigator A changes the submenu of CHA Control menu as follows:

Show mode (CH (A)/HIDE) -> Couple mode (AC/DC-) -> Vol sensitivity (50mV-l0V) -> YPOS Select mode.

Navigator B

Navigator B is used to navigate in the main menu (ref. table l), Action "Press" of Navigator B changes menus

from menu Group1 to Group2 (ref. menu) and vice versa; While action Pull/Push" changes the main menu

within a Group.

Run/Hold

The Run/Hold is used to control working state of DS203: Working or Pause

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3. When cursor is at the bottom, select the exit mode with Navigator A, and press the calibrate button to

exit the calibration status.

More calibration information will be supplied in latter pages.

Preset

This button is used to save your setting when using the DS203. With this function, you don't need to configure

your DS203 every time you power it. For example, configure the signal generator as Square, 10kHz, and then

press the Preset Button. You would find the signal generator the same as your last configuration.

Save Wave

Connect DS203 to PC via USB cable. Switch on the device, and then you will find it in your PC.

In order to save the wave in DS203, Template of .bmpfiles or .datfiles must be stored into DS203 first. You can

download the template:

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Navigate to storage menu with Navigator B. While you get Save F il eoption, you can select the action (Save

Fi le/Load Fi le) you want to do via Navigator A. Press Navigator A to select the file name and file format (.dat

or .bmp), then press the "Save Wave" button, the wave in DS203 will be stored as the format you set.

Menu

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Menu Name: Optional State:

CHA Control CH(A)/HIDE

CHB Control CH(B)/HIDE

CHC Control CH(C)/HIDE

CHD Control CH(D) / (A+B) / (A-B) / (C&D) / (CID) / (FILE_X)

Sync. Mode AUTO/NORM/SINGL/NONE/SCAN

Output Mode SINE /Triang/ Saw / Square

Trigg Mode Trigg (Note l)

Diff between ref v1 & v2 V

Storage Manu (Note 2)

Diff between ref T2 &T2 T

Back Light Control B.L

Voice Control Vol

No te:

1. The color in DSO Quod v2.6 represents each channel (blue for CH(A). yellow for CH(B).

purple for CH(C) and cyan for CH(D))

2. Storage Menu is at the bottom of DS203. It shows only when selected

Group2: Menus to show user the measur e resul t

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Submenu Function

Show mode Show or hide related input channel

Couple mode AC couple or DC couple

Vol sensitivity Vol sensitivity adjust(50mV-l0V)

YPOS adjust mode YPOS adjust

Navigate the submenus with action "press" of Navigator A, and adjust the setting with action "Pull/Push".

Digital input channel CHC is a digital input channel, it only has two submenus: Show mode and YPOS adjust

Mode.Digital

Digital input channel CHD has something different. It can be set to math inputs (Table2). It has sub-menus as

Submenu Function

Show mode HIDE / CH(D) / (A+B) / (A-B) / (C&D) / (C|D) /

( FILE_X)

YPOS adjust mode YPos adjust

The results of A+B, A-B, C&D and C|D, can be set as the inputs of channel D. With this function, it is

convenient for the user to observe and analyze the signal of each channel. Besides, the FILE_X can be used as

the input when recalling data from .DAT file (Ref. store and Recall).

Syn . M ode

AUTO: Always refresh display, synchronize when triggered.

Norm: Display synchronized waveform when triggered blank if not triggering

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This menu also has a submenu of Horizontal sensitivity, From O.1s/div t0 1s/div. And a submenu of XPOS,

Each "div" means a grid unit of the screen. You can view the full sampling buffer of a channel with the action

"Push/Pull" of Navigator A.

Output M ode

There are two signal generator sources in the DS203, Digita l source and analog source. The

digital source outputs duty ratio is adjustable from 1% to 99% square wave, and frequency from10HZ to 8MHZ. The analog outputs wave forms include: Sine wave, Triangle wave, Saw wave.

Frequency form 10HZ to 20KHZ.

This menu has a sub-menu as

Sub-menu Function

Output wave Output wave selectFrequency Set the frequency of output

Tr igger Mode

There are 8 trigger modes

Trigger Mode Trigger Condition

I Falling edge of threshold

F Rising edge of threshold

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Waveform could be saved to the internal 2MB USB disk, with.bmpor .datfiles, and then recalled as the user

want.

Save waveform as .bmp:

1. Copy the Filexxx.BM P to the 2M USB disk, rename the xxx as 000, 001, 002_

2. Navigate to the save menu, select "Save file", "xxx (the one you select to use)" and ".BMP"

3.Push button "Save wave" (The forth button on DS203)

4. Reset the DS203, you will see the saved BMP in your USB disk.

Save and recall .DAT

1. Copy the Filexxx. DAT to the 2M USB disk, rename thexxx as 000, 001, 002

2. Navigate to the save menu, select "Save file", "xxx(the one you select to use)" and ".dat"

3. Press button "Save wave" to store the data into .datfile.

4. In order to recall the data you stored in the USB disk, first navigate to the save menu, select the "load

file""xxx(the one you want to recall)"and ".dat", and then press the button "Save Wave".

5. Navigate to the CHD, select the show mode as File_x(the data in which channel you stored ), and, you

can get the recalled waveform.

Time Measure

Th T h th D l f T1 d T2 It h b f T1 d T2 Adj t T1 li d T2 li

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Min Min value of input (CHA/B/C)

Vbt Voltage of battry(common)

FPS Frames per second(common)

Vpp Vpp of input (CHA/B/C)

Vdc Mean value of input(CHA/B/C)

RMS Effective value of input(CHA/B/C)

Also, different color represents different channel. And, because the Vbt and FPS is common for all the channels,

the back color of them is white.

Firmware Upgrade

Firmware can be downloaded via this link: http://www.elechouse.com/elechouse/images/product/DS203/

DS203_firmware.rar

Installation into the DS203 are shown as follows:

1. CFG_FPGA.ADR+ VxxxFPGA.bin. The two files for FPGA logic, you need to install the .ADR file and

then the .bin file.

2. logo_00B.ADR+ logo_001.bin. The logo files, you need to install the .ADR file and then the .bin file.

3. APP_Bxxx.hex, the app firmware.

4. SYS_Bxxx.hex, the sys firmware.

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The firmware of DS203 is upgradable via USB as following steps:

1. Connecting DS203 via mini USB cable to PC, Power up the DS203 while pressing ">||", you will see a

virtue USB disk added on your PC and the screen of DS203 will display words Device Firmware

Upgrade Vx.xx, Please Copy .Hex/.Binfile to DFU virtual USB disk..

2. If you want to update App or Sys, copy APP_xxx.hexor SYS_xxx.hexinto the USB disk. Note that only

one file can be copied each time. The USB disk will auto-reset, the disk window will automatically be

closed, and the file name will be changed to APP_xxx.rdyor SYS_xxx.rdy.

3. If you want to update the logo or logic in FPGA, You should first copy the logo/FPGA.ADRfile into the

USB disk. After the Auto-reset, the file name changes to logo/FPGA.SET. Then, copy the

logo/FPGA.bininto the disk, After the Auto-reset, the file name changes to logo/FPGA.rdy.

4. Reset the DS203, the upgrade process is finished

For example, you want to update the APP firmware to v2.35 to correct the calibration error, you just need to

d t th t 2 35 th i d t i th fi

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The issue right now in your DS203 can be seen on the screen when you power it on.

Design your own logo

Logo files are included in the firmware package. You can download via the link above.

When you want to change the logo displayed on the screen, you may do it as follows:

1. Design your logo. The logo you designed should be a picture saved as xxx_logo.bmp(note the formate

should be bmp and the name of the logo should be 8 characters including the _), and the picture shouldbe 16 colors and in size of 64x256.The logo picture should be 8.11kB.

2. Then change the document style of the picture (namely the suffix) from .bmpinto .bin.

3. Connect the Quad to PC via USB, and power it with the ">||" been pressed. The screen of DS203 will

display words Device Firmware Upgrade Vx.xx, Please Copy .Hex/.Bin file to DFU virtual USB disk.

And you can see a virtual disk added on your PC.

4. Copy the LOGO_00B.ADR that you downloaded into the Virtual disk. It will reset automatically and change

the name into LOGO_00B.SET which means that you can put in logo file now.

5. Copy the xxx_logo.bininto the Virtual disk. It again will reset automatically and change the logo name

into xxx_logo.rdyand the LOGO_00B.ADRinto LOGO_00B.USEwhich means the logo is loaded

successfully.

6. Reset (restart) DS203, you can see your logo on it, as picture below shows.

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Calibrate

Calibrate the probe

When you first receive your DS203 or after a long time using, you may need to calibrate your DS203.

Step1:Open the back cover, and you will see 6 adjustable capacitors.

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Step2:Connect the wave out to CHA or CHB, set the wave output: square 10Khz, and the CHA or CHB DC

couple, 0.5V/div, trigger mode: auto, and 50us

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Calibrate the DS203 (for app2.35 or above)

If you update your App to app2.35, you might need to do this calibration. A standard voltmeter and an

adjustable voltage source are needed for calibrating the DS203.

In working state, when the main menu CH (A) was selected, pressing the calibrate button about 2s to begin the

calibration of CH (A). While main menu CH (B) was selected, pressing the calibrate button about 2s to begin

the calibration of CH (B).

1. Connect the probe to ground. And, adjust the Cell ZERO50mv to 0.00 with Navigator A. Then,

press down the Navigator A to jump to the cell DIFF-50mv. Adjust this cell to 0.00(-1 or +1 can be

t bl t ) P d th N i t A th j b k t ll ZERO 50 k

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4. Press the Navigator B to jump to the voltage line, Set the voltagesource to 250mv-300mv as the

prompt (you can measure the voltage with a voltmeter to get the voltage precisely), connect it to theDSO channel you are calibrating, and adjust the voltage to the voltageyou measured. For example, if

your source was 290mv, adjust the cellvoltage-50mv to 290mv. Push/pull the Navigator B to jump

to the other row.

5. For the other row, repeat the operation as the prompt. For example, my voltage source for all the row

was: 300mv, 600mv, 1.2v, 3v, 6v, 10v, 10v, 10v (I do not have a voltage source of 30v and 60v, so ,I use

10v for the row 5v and row 10v) .

CHA ZERO DIFF Voltage

50mv 0.00 0.00(or +1,-1) 300mv

0.1v 0.00 --- 600mv

0.2v 0.00 --- 1.2v

0.5v 0.00 --- 3.00v

1v 0.00 --- 6.00v

2v 0.00 --- 10.00v5v 0.00 --- 10.00v

10v 0.00 --- 10.00v

6. After all this have been done, push the Navigator B to the exit mode. There are 3 models: exit without

calibration/exit with calibration/exit with restore defaults. Select the exit with calibration with

Navigator A. And then press the calibrate button.

7. The DS203shows Save the calibration data means you have done the calibration successfully.

Assemble

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Step 2

Note the direction when attaching it, a notch there for the square hole can help you. It is only when you finish

the sticking that you can tear up the protection paper for the back-adhesive paper.

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Step 4

Stick the decorative aluminum board on the battery shell.

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Step 6

Stick the EVA adhesive sheet on the battery shield.

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Step 8

Install the keys

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Step 10

Install the main board in the bottom shell

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Step 12

Install the surface shell

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Step 14

Install the battery shield

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The information in this document may change without notice.

Revision History

Rev. Date Author Description

A May. 22nd, 2011 Wilson Shen Initial version

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41

D10A

C17105

R29

12K

V+

R23

1K1

C19105

R25

1K1

R27

12K

GND1

AIN2

AIN3

DFS4

REFA

5

REFO

6

R

EFB

7

S1 8

S2 9

BIN11

BIN10

GND12

VD 13

CKB

14

VDD 15

GND16

D7B

17

D6B

18

D5B

19

D4B

20

D3B

21

D2B

22

D1B

23

D0B

24

NC

25

NC 26

GND27

VDD 28

GND29

VD 30

VD 31

GND32

VDD 33

GND34

NC 35

NC 36

D1A

38

D2A

39

D3A

40

D4A

41

D5A

42

D6A

43

D7A

44

D0A

37

GND45

VDD 46

C

KA

47

VD 48

U6

AD9288-40

VDDA

2V8C21

22uF/6.3V

Mo

de

CKB

BQ2

BQ3

BQ1

BQ0

BQ7

BQ6

BQ5

BQ4

CKA

AQ7

AQ6

AQ3

AQ0

AQ1

AQ2

AQ4

AQ5

Ax0

V1

R3112K

R34

#51R

Bi

AiR33

#51R

nPD

Ax1

V+

-3V

C8A 101

C20105

R30

12K

V+ V+R16

22K

R2620K

R4

180K

R6

3K3 R22

3K3R10

3K

R1427K

R24

1K1

C18105

R26

1K1

C2105/100V

R2812K

C2A

5/30pFC8 271CN2

AC2

Bx0Bx2Bx5

V2

L2FB

S4 CPC1017

Bx0R36

1K1

0.5V

10V

S2 CPC1017

R8

3K R32

12K

C4A3/10pF

C6A5/30pF

Bin

5

67

8

U2B

OPA2354

C12

10p

R12

27K

R20

5K1

C10

10p

-3V

Y0 1

Y22

Y3

X0 12

X215

X13

Y34

V+ 16

Y15

CS 6

Gnd 8

X114

A 10

B 9

V- 7

X311

U4

74HC4052PW

Bx1

D6CESD5V0AP

DTr

Fout

2V8

CTr

BT0

RX

TX

1 2 3 4 5 6

CN7

R47

51R

RST

CN5

CN3R41

11K

R38

90K9

L3FB

CN4

R4211K

R37

90K9D5

CESD5V0AP

Cin

Din

Fout

ISP

R40#1K1

R39#1K1

C_SO

Option

R43

1K1

2V8

C30

105

L8 FB

C357pF

C367pF

X1

8MHzL7 FB

DS203V2.6_SCH

Vusb

D-

D+

CHRG 1

Gnd2

Batt 3

Vcc4

PRG 5

U14

LTC4054

C53

22uF/6.3V

R48

11K

R49

11K

C54

105

2V8

C32100uF/10V

C56

105

C52

105

C28

105

C62

105

C60

105

C58

105

C55

105

C41

105

VDDA

L9

AC2

Bx2

Ax5

AC1

Bx53V6

Ax2

R50

2KR61

22R

R5622R

R572K

C31

105

-3V

C25 105

2V8

BAT

3V6

Fout

2V8

Vbat

D+D-

Vusb

BZ

C_RST

Ai

Bi

H/L

SDA

SCK

3V6

2V8

D8

CESD5V0AP

EECS

MSCK

MISO

MOSI

2V8

C34100uF/10V

C2422uF/6.3V

C33

22pF

AQ7

AQ6

AQ3

AQ0

AQ1

AQ2

AQ4

AQ5

DB6

DB5

CKA

CKB

DB7

DB8

DB4

DB3

DB0

DB1

DB2

BQ2

BQ3

BQ1

BQ0

BQ7

BQ6

BQ5

BQ4

Cdone

C_SO

DB15

DB14

DB13

DB12

DB9

DB10

DB11

TX

WR

NE1

RD

RS

CLR

RS

EECS

Mode

BT0MSCK

MISO

MOSI

ADC_EN

K6

K5

K7

K8

K2

K1

K3

K4

BZ

K7

K6

K8

K5

BZ

EN1

Gnd2

SW 3

Vin4

FB 5

U15 QX3406AL

L5

100uHC51

105

C50

105

2V8

C37105

R5511K

R58

1K1

R5911K

V2V1

NC1

EN2

Vdd3

Gnd4

Led3 6

Led2 7

Led1 8

Led4 5

U10 QX5239B-20mA

3V6

BL

C69 105

C26

105

C66 105

C68 105

MCO

Q1

LN2300

SW

C42

105

C64

105

Vbat R5411K

C67 105

Bx1Bx0

Ax1

Ax0

K4K3K2K1

K2

K1

K3

K4

C29

101

PE21

PE32

PE43

PE54

PE65

VBAT 6

PC137

PC148

PC159

VSS 10

VDD 11

OSC112

OSC013

NRST

14

PC0_AIN1015

PC1_AIN1116

PC2_AIN1217

PC318

VSSA 19

VREF- 20

VREF+ 21

VDDA 22

PA0_T5123

PA1_T5224

PA2_T23 25

PA3 26

VSS 27

VDD 28

PA4_DAC129

PA5 30

PA6_T31 31

PA7_T32 32

PC4 33

PC534

PB0 35

PB1 36

PB2_BT1 37

PE7

_D4

38

PE8

_D5

39

PE9

_D6

40

PE10

_D7

41

PE11

_D8

42

PE12

_D9

43

PE13

_D10

44

PE14

_D11

45

PE15

_D12

46

PB10 47

PB11 48

VSS 49

VDD 50

PB12 51

PB13 52

PB14 53

PB15 54

PD8

_D13

55

PD9

_D14

56

PD10

_D15

57

PD11

_A16

58

PD12

_A17

59

PD13_A1860

PD14

_D0

61

PD15

_D1

62

PC6

_T81

63

PC7

_T82

64

PC8

65

PC9

66

PA8_MCO67

PA9

_TX

68

PA10

_RX

69

PA11_D-70 PA12_D+71

PA13

72

NC

73

VSS 74

VDD 75P

A14

76

PA15

77

PC10

78

PC11

79

PC12

80

PD0

_D2

81

PD1

_D3

82

PD283

PD384

PD4

_NOE

85

PD5

_NWE

86

PD6

87

PD7

_NE1

88

PB3

_SCK

89

PB4

_SIMO

90

PB5

_MOSI

91

PB692

PB7_T4293

BOOT0

94

PB8_T4395

PB9_T4496

PE097

PE198

VSS 99

VDD 100

U8

STM32F103VCT6

R533K

R60

11K

R52

11K

R51

11K

I/O

1

I/O 2

I/O 3

I/O 4

I/O 9

I/O 10

I/O 7

I/O 8

VIO6

GND 5

VCC61

I/O 12

VCC11

I/O_GBIN 13

I/O_GBIN 15

I/O 16

I/O_GBIN62

I/O 18

I/O 19

I/O

20

I/O 21

SPI_SCK48

SPI_SS49

I/O 24

I/O 25

I/O 26

I/O

27

I/O

28

I/O

29

I/O

30

VIO14

GND 17

I/O

_GBIN

33

I/O

_GBIN

34

I/O_GBIN63

I/O

36

I/O

37

I/O

93

I/O65

I/O

40

I/O

_CS0

41

I/O

_CS1

42

I/O68

I/O69

VIO22

GND 23

I/O71 I/O72

I/O 73

I/O

74

I/O

51

I/O

52

I/O

53

I/O

54

I/O

79

I/O

56

I/O

57

I/O

59

VIO58

GND 32

I/O60

VIO92

VCC35

I/O 64

GND 39

I/O66

GND 70

GND 84

GND 98

CDONE43

C_RST44

SPI_SO45

SPI_SI46

VIO88

I/O

78

VPP_FAST 76

VCC77

VPP_2V575

GND 47

VIO31

VIO67

SPI_VCC50

I/O

83

I/O

80

I/O

85

I/O

86

I/O

87

I/O

81

I/O

_GBIN

89

I/O

_GBIN

90

I/O

82

I/O

91

GND 55

VIO38

I/O

95

I/O

96

I/O

97

I/O

94

I/O

99

I/O

100

U9

ICE65L04F_VQ100

1V2

DB6

DB5

DB7

DB8

DB4

DB3

DB0

DB1

DB2

DB15

DB14

DB13

DB12

DB9

DB10

DB11

WR

NE1

RD

DB6

DB5

DB7

DB8

DB4

DB3

DB0

DB1

DB2

DB15

DB14

DB13

DB12

DB9

DB10

DB11

WR

NE1

CLR

RD

Mo

de

MCO

2v8

RX

CTr

DTr

1

Vi 2

Vo3

U11

XC6206P122

ClrW

C57

105

C47

105

C61

105

C59

105

C65 105

C63

105

C4922uF/6.3V

C44

105

C48

105

C46

105

C45

105

L6100uH

2V8

C39

105

C43

105

BL

1V2

RST

C_SI

C_SCK

C_SS

L4

100uH

V+

3V6

C3822uF/6.3V

C40

105

Out1

Vi 2

C-3

Gnd4

EN 5

C+ 6

U12

TC1221

1

3

2 T

EC1

1

3

2 T

EC0

LCD

-ID

1

NC

2

NC

3

NC

4

NC

5

GND

6

IOVCC

7

VCC

8

FMARK

9

CS

10

RS

11

WR

12

RD

13

DB0

14

DB1

15

DB2

16

DB3

17

DB4

18

DB5

19

DB6

20

DB7

21

DB8

22

DB9

23

DB10

24

DB11

25

DB12

26

DB13

27

DB14

28

DB15

29

RST

30

GND

31

LED+

32

LED1-33

LED2-34

LED3-35

LED4-36

NC

37

LCM

12345GGGG

CN8

H/L

CS1

Q2

WP 3

Vss4

D 5

CK 6

RST7

Vcc 8

U13

M25PE16

RST

FUNC ITEMFIT ESC SEL RUN

MINI_USB

6.8uHPWR

C27

105

K9

K10

K9

K10

nPD

3.7V

3.0" 240*400 TFT LCD

V+

-3V

C7A 101

V+R1

620K

R3180K

R3A

12K

R5A4K7

R213K3

R7

3K

R1722K

C1105/100V

C1A

5/30pF

C7 271

CN1

AC1

Ax2Ax5

L1FB

S3 CPC1017

Ax0

R1A180K

0.5V

10V

S1 CPC1017

R9

3K

C3A3/10pF

C5A5/30pF

Ain

5

67

8

U1B

OPA2354

R15

22K

R19

5K1

-3V

Y0 1

Y22

Y3

X0 12

X215

X13

Y34

V+ 16

Y15

CS 6

Gnd 8X114

A 10

B 9

V- 7

X311

U3

74HC4052PW

R351K1

Cdone

C23

105

C70 105

C71

105

C72

105

2

4

31

5

U18

OPA354

2

4

31

5U17

OPA354

2

4

31

5

U7

OPA354

R631K1

R621K1

1234

56

U19 FDFMA2P853

VB

CHRG

3

2

D10BYEL+GRN

REDR643K CHRG

C22

105

CHRG

Y01

Y2 2

Y 3

X012

X2 15

X 13

Y3 4

V+16

Y1 5

CS6

Gnd8 X1 14

A10

B9

V-7

X3 11

U5

74HC4052PW

Y01

Y2 2

Y 3

X012

X2 15

X 13

Y3 4

V+16

Y1 5

CS6

Gnd8

X1 14

A10

B9

V-7

X3 11

U16

74HC4052PW

D9SSA34

SLEEP

SLEEP

SLEEP

R1127K C9

10p

R13

27K C11

10p

R5

3K3

R2A180K

R6A4K7

R18

22K

R4A

12K

42

31

U1A

OPA2354

4

2

31

U2A

OPA2354

L10

FB

C7333pF

C7433pF