SBAU448 September   2024 ADS8681W

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Performance Development Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 EVM Analog Interface
      1. 2.1.1 ADC Analog Input Signal Path
      2. 2.1.2 Onboard ADC Reference
    2. 2.2 Power Supplies
  9. 3Software
    1. 3.1 Digital Interfaces
      1. 3.1.1 multiSPITM SPI for ADC Digital IO
    2. 3.2 ADS8681WEVM-PDK Initial Setup
      1. 3.2.1 Default Jumper and Switch Settings
      2. 3.2.2 EVM Graphical User Interface (GUI) Software Installation
  10. 4Implementation Results
    1. 4.1 ADS8681WEVM-PDK Operation
      1. 4.1.1 EVM GUI Global Settings for ADC control
      2. 4.1.2 Register Map Configuration Tool
      3. 4.1.3 Time Domain Display Tool
      4. 4.1.4 Histogram Tool
      5. 4.1.5 Spectral Analysis Tool
      6. 4.1.6 Linearity Analysis Tool
  11. 5Hardware Design Files
    1. 5.1 ADS8681WEVM-PDK Schematic
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials
  12. 6Additional Information
    1. 6.1 Trademarks
  13. 7Related Documentation

5.3 Bill of Materials

The EVM BOM is listed in Table 5-1.

Table 5-1 ADS8681WEVM Bill of Materials

Designator

Quantity

Value

Description

Package Reference

Part Number

Manufacturer

@H1, @H2, @H3, @H4

4

Hex Standoff, #4-40, Aluminum, 1/4"

1/4" Aluminum Hex Standoff

1891

Keystone

@H5, @H6

2

MACHINE SCREW PAN PHILLIPS M2

MPMS 002 0005 PH

B&F Fastener Supply

C1

1

330pF

CAP, CERM, 330pF, 100V, +/- 5%, C0G/NP0, 0603

0603

C1608C0G2A331J

TDK

C2, C10, C14

3

0.1uF

CAP, CERM, 0.1µF, 50V, +/- 10%, X7R, 0603

0603

C0603C104K5RACTU

Kemet

C3, C4, C5, C6, C7, C11, C13, C15, C19

9

1uF

CAP, CERM, 1µF, 16V, +/- 10%, X7R, 0603

0603

C1608X7R1C105K

TDK

C8, C9, C16, C18, C21, C22

6

10uF

CAP, CERM, 10µF, 25V, +/- 10%, X5R, 0805

0805

CL21A106KAFN3NE

Samsung Electro-Mechanics

C12

1

22uF

CAP, CERM, 22µF, 16V, +/- 20%, X5R, 0805

0805

GRM21BR61C226ME44

MuRata

C17, C20

2

10000pF

CAP, 10000pF, 0603, 5%, 50V, C0G

0603

C1608C0G1H103J080AA

TDK

D2

1

Green

LED, Green, SMD

2x1.4mm

LG M67K-G1J2-24-Z

OSRAM

D3

1

9.1V

Diode, Zener, 9.1V, 500mW, SOD-123

SOD-123

MMSZ4696T1G

ON Semiconductor

FID1, FID2, FID3

3

Fiducial mark. There is nothing to buy or mount.

N/A

N/A

N/A

H1, H2, H3, H4

4

MACHINE SCREW PAN PHILLIPS 4-40

Machine Screw, 4-40, 1/4"

PMSSS 440 0025 PH

B&F Fastener Supply

H5, H6

2

ROUND STANDOFF M2 STEEL 5MM

ROUND STANDOFF M2 STEEL 5MM

9774050243R

Wurth Elektronik

H7

1

CABLE USB A MALE-B MICRO MALE 1M (Kit Item)

USB Cable

102-1092-BL-00100

CNC Tech

J1

1

Connector, TH, Right Angle SMA 50 ohm

SMA

901-143

Amphenol RF

J2

1

Header(Shrouded), 19.7mil, 30x2, Gold, SMT

Header (Shrouded), 19.7mil, 30x2, SMT

QTH-030-01-L-D-A

Samtec

J3, J6

2

Header, 2.54mm, 2x1, Gold, R/A, SMT

Header, 2.54mm, 2x1, R/A, SMT

87898-0204

Molex

J4

1

Header, 100mil, 3x1, Gold, SMT

Samtec_TSM-103-01-X-SV

TSM-103-01-L-SV

Samtec

J5

1

Header, 100mil, 4x2, Gold, SMT

Header, 100mil, 4x2, SMT

15910080

Molex

J7

1

Connector, Right Angle SMA 50 ohm, TH

SMA

901-143

Amphenol RF

J8

1

Header, 100mil, 4x2, Gold, SMT

Header, 100mil, 4x2, SMT

15910080

Molex

Q1

1

45V

Transistor, NPN, 45V, 0.1A, SOT-23

SOT-23

BC847CLT1G

ON Semiconductor

R1, R2, R4, R5, R31

5

0

RES, 0, 5%, 0.1 W, 0603

0603

CRCW06030000Z0EA

Vishay-Dale

R6, R9, R13, R20, R21, R30, R32

7

10.0k

RES, 10.0 k, 1%, 0.1 W, 0603

0603

RC0603FR-0710KL

Yageo America

R7, R8

2

249

RES, 249, 1%, 0.1 W, 0603

0603

RC0603FR-07249RL

Yageo America

R10, R11

2

1.00k

RES, 1.00 k, 0.1%, 0.1 W, 0603

0603

RT0603BRD071KL

Yageo America

R12

1

0.47

RES, 0.47, 1%, 0.1 W, 0603

0603

ERJ-3RQFR47V

Panasonic

R14, R17, R19, R23, R26, R27, R28, R29

8

49.9

RES, 49.9, 1%, 0.063 W, 0402

0402

CRCW040249R9FKED

Vishay-Dale

R15

1

220k

RES, 220 k, 5%, 0.063 W, 0402

0402

CRCW0402220KJNED

Vishay-Dale

R16

1

102k

RES, 102 k, 0.1%, 0.1 W, 0603

0603

RG1608P-1023-B-T5

Susumu Co Ltd

R18

1

100k

RES, 100 k, 1%, 0.063 W, 0402

0402

CRCW0402100KFKED

Vishay-Dale

R22

1

0

RES, 0, 5%, 0.063 W, 0402

0402

RC0402JR-070RL

Yageo America

R24

1

330k

RES, 330 k, 0.1%, 0.1 W, 0603

0603

RG1608P-334-B-T5

Susumu Co Ltd

R25, R34

2

0.22

RES, 0.22, 1%, 0.1 W, 0603

0603

ERJ-3RQFR22V

Panasonic

S1

1

Switch, Slide, SPDT 100mA, SMT

Switch, 5.4x2.5x2.5mm

CAS-120TA

Copal Electronics

SH-J4

1

Shunt, 2.54mm, Gold, Black

Shunt, 2.54mm, Black

60900213421

Wurth Elektronik

TP1, TP2, TP3, TP4, TP5

5

SMT

Test Point, Miniature, SMT

Testpoint_Keystone_Miniature

5015

Keystone

TP6, TP7

2

Test Point, Miniature, SMT

Testpoint_Keystone_Miniature

5015

Keystone Electronics

U1

1

16-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System With Programmable, Bipolar Input Ranges

WQFN16

ADS8681WRUMT

Texas Instruments

U2

1

Low Noise, Very Low Drift, Precision Voltage Reference, -40 to 125 degC, 8-pin SOIC (D), Green (RoHS & no Sb/Br)

D0008A

REF5040ID

Texas Instruments

U3

1

Precision, 20MHz, 0.9pA Ib, RRIO, CMOS Operational Amplifier, 1.8 to 5.5V, -40 to 125 degC, 5-pin SOT23 (DBV0005A), Green (RoHS and no Sb/Br)

DBV0005A

OPA320AIDBVR

Texas Instruments

U4

1

Single Output High PSRR LDO, 150mA, Adjustable 1.2 to 33V Output, 3 to 36V Input, with Ultra-Low Noise, 8-pin MSOP (DGN), -40 to 125 degC, Green (RoHS & no Sb/Br)

DGN0008D

TPS7A4901DGNR

Texas Instruments

U5

1

I2C BUS EEPROM (2-Wire), TSSOP-B8

TSSOP-8

BR24G32FVT-3AGE2

Rohm

D1, D4

0

36V

Diode, TVS, Bi, 36V, 64.3Vc, SMB

SMB

SM6T36CA

STMicroelectronics

R3, R33

0

100

RES, 100, 1%, 0.4 W, AEC-Q200 Grade 0, 1.4x3.6mm

1.4x3.6mm

MMA02040C1000FB300

Vishay/Beyschlag