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User’s Guide
ADS8860EVM-PDK
Art Kay
ABSTRACT
This user's guide describes the operation and use of the ADS8860 evaluation module (EVM). The ADS8860 is a
16-bit, pseudo-differential, unipolar, successive approximation register (SAR), analog-to-digital converter (ADC)
with a maximum throughput of 1 MSPS. The device is a very low-power ADC with excellent noise and distortion
performance for ac or dc signals. The performance demonstration kit (PDK) eases EVM evaluation with
additional hardware and software for computer connectivity through a universal serial bus (USB). The
ADS8860EVM-PDK includes the ADS8860EVM as a daughter card, Precision Host Adaptor (PHI) digital
controler, and a A-to-B USB cable. This user's guide covers circuit description, schematic diagram, and bill of
materials for the ADS8860EVM daughter card.
Table 1-1. Related Documentation
Device
Literature Number
ADS8860
SBAS547
OPA320
SBOS351
REF6050
SBOS410
TPS7A4700
SLOS432
TPS3836K33
SLVS382
Table of Contents
1 EVM Overview......................................................................................................................................................................... 3
1.1 ADS8860EVM Kit...............................................................................................................................................................3
1.2 ADS8860EVM Board......................................................................................................................................................... 3
2 EVM Analog Interface.............................................................................................................................................................4
2.1 ADC Drive Amplifier and Filter........................................................................................................................................... 4
2.2 Reference Drive................................................................................................................................................................. 4
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3 Digital Interface.......................................................................................................................................................................5
3.1 Serial Interface (SPI)..........................................................................................................................................................5
3.2 I2C Bus for the Onboard EEPROM.................................................................................................................................... 5
4 Power Supplies....................................................................................................................................................................... 6
5 ADS8860EVM Initial Setup..................................................................................................................................................... 7
5.1 Software Installation...........................................................................................................................................................7
6 EVM Operation...................................................................................................................................................................... 10
6.1 Connecting the Hardware................................................................................................................................................ 10
6.2 Using the Optional Precision Signal Injector (PSI)........................................................................................................... 11
6.3 EVM GUI Global Settings for ADC Control...................................................................................................................... 12
6.4 Time Domain Display....................................................................................................................................................... 13
6.5 Frequency Domain Display.............................................................................................................................................. 14
6.6 Histogram Display............................................................................................................................................................ 15
7 Bill of Materials, Schematics, and Layout.......................................................................................................................... 16
7.1 Bill of Materials.................................................................................................................................................................16
7.2 Board Layouts.................................................................................................................................................................. 18
7.3 Schematics.......................................................................................................................................................................19
8 Reference.............................................................................................................................................................................. 21
9 Revision History................................................................................................................................................................... 21
List of Figures
Figure 1-1. System Connection for Evaluation............................................................................................................................ 3
Figure 2-1. ADS8860 Input Drive Circuit..................................................................................................................................... 4
Figure 2-2. Reference Input Drive............................................................................................................................................... 4
Figure 3-1. EEPROM for the EVM ID.......................................................................................................................................... 5
Figure 4-1. Power Supplies, Regulators, and Indicators............................................................................................................. 6
Figure 5-1. ADS8860 Software Installation Prompts................................................................................................................... 7
Figure 5-2. Device Driver Installation Wizard Prompts................................................................................................................ 8
Figure 5-3. LabVIEW Run-Time Engine Installation.................................................................................................................... 8
Figure 5-4. ADS8860EVM GUI Folder Post-Installation.............................................................................................................. 9
Figure 6-1. ADS8860EVM Hardware Setup and LED Indicators...............................................................................................10
Figure 6-2. Launch the EVM GUI Software............................................................................................................................... 10
Figure 6-3. PSI Signal Generator Connection............................................................................................................................11
Figure 6-4. EVM GUI Global Input Controls.............................................................................................................................. 12
Figure 6-5. Time Domain Display Tool Options......................................................................................................................... 13
Figure 6-6. Spectral Analysis Tool............................................................................................................................................. 14
Figure 6-7. Histogram Analysis Tool.......................................................................................................................................... 15
Figure 7-1. ADS8860EVM PCB: Ground Layer.........................................................................................................................18
Figure 7-2. ADS8860EVM PCB: Bottom Layer (GND).............................................................................................................. 18
List of Tables
Table 1-1. Related Documentation.............................................................................................................................................. 1
Table 6-1. Jumper Positions for PSI...........................................................................................................................................11
Table 7-1. ADS8860EVM Bill of Materials................................................................................................................................. 16
Trademarks
Windows™ is a trademark of Microsoft.
All other trademarks are the property of their respective owners.
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1 EVM Overview
Table 1-1 lists the related documents that are available for download from Texas Instruments at www.ti.com.
1.1 ADS8860EVM Kit
The ADS8860 evaluation module kit includes the following features:
• Hardware and software required for diagnostic testing as well as accurate performance evaluation of the
ADS8860 ADC
• USB powered—no external power supply is required
• The PHI controller that provides a convenient communication interface to the ADS8860 ADC over USB 2.0
(or higher) for power delivery as well as digital input and output
• Easy-to-use evaluation software for 64-bit Microsoft Windows™7, Windows 8, and Windows 10 operating
systems
• The software suite includes graphical tools for data capture, histogram analysis, and spectral analysis. This
suite also has a provision for exporting data to a text file for post-processing.
ADS8860EVM-PDK PHI Board
xx
xx
xx
xx
xx
xx
xx
x
ADS8860
GUI
Signal
Source
x
x
x
Included in kit
Figure 1-1. System Connection for Evaluation
x
1.2 ADS8860EVM Board
The ADS8860EVM board includes:
• An external single-ended signal source applied to the SMA connector.
• The amplifier driver and voltage reference circuit can be used as a reference design. These components are
optimized to meet the ADS8860 data sheet performance at 1 MSPS.
• The serial interface connects to the PHI controller via a 60-pin connector (J2).
• Test-point connection monitor digital signals with a logic analyzer.
• An onboard ultra-low noise low-dropout (LDO) regulator provides an excellent 3.3-V and 5.3-V voltage range.
• The REF6050 precision 5-V voltage reference is optimized for the SAR ADC VREF input.
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2 EVM Analog Interface
The ADS8860EVM is an evaluation module built to the TI Modular EVM system specifications. The EVM by itself
has no microprocessor and cannot run software. Thus, the EVM is available as part of the ADS8860EVM-PDK
kit that combines the ADS8860EVM as a daughter board with PHI controller using software as a graphical user
interface (GUI).
2.1 ADC Drive Amplifier and Filter
The circuit shown in Figure 2-1 shows a typical amplifier drive circuit for the ADS8860. The amplifier (U4) and its
associated output filter (R13, R14, and C7) are designed for good SNR and THD performance at a maximum
sampling rate (1 MSPS). In general, the OPAx320 was selected for its wide bandwidth and low output
impedance. This device also has rail-to-rail input and output swing without crossover distortion. The input filter
(R1 and C1) are used to minimize input noise and can be adjusted according to your requirements. For more
details on this circuit, see the SAR ADC Front End Component Selection.
TP1
INPU T
+5.3V
Input_CH
1
J1
TP2
TP4
TP5
CONVST SCLK SDI
R1
1.00k
DV DD
2
3
4
5
C6
TP3
SDO
AV DD
1µF
C1
0.01uF
GN D
GN D
R2
C2
1µF
C3
1µF
GN D
U1
2
+5.3V
GN D
5
GN D
10
U4
VREF
4
1
R13
1
3
2
OPA320AIDBVR
24.9
R14
C7
DN P
1100pF
CONVST
49.9
R15
AVDD
CONVST 6
DVDD
SCLK
8
R3
DIN
9
R4
R5
REF
RET_SCLK
49.9
SCLK
49.9
SDI
49.9
3
AINP
DOUT
7
4
AINN
GND
5
SDO
49.9
R6
10.0k
DV DD
ADS8860IDGSR
24.9
GN D
GN D
GN D
Figure 2-1. ADS8860 Input Drive Circuit
2.2 Reference Drive
The circuit shown in Figure 2-2 shows the voltage reference input drive for the SAR ADC. For many SAR ADCs,
such as the ADS8860, the reference input is a switched capacitor input. This type of input requires a widebandwidth, low-impedance signal source. Many standard voltage reference require an external wide bandwidth
buffer to drive the reference input. The REF60xx has a built-in, wide-bandwidth driver, and is therefore optimized
for driving SAR ADC reference inputs. The output filter network (R11 and C12) are the standard components
recommended in the REF60xx for stable, low-noise operation.
TP6
VREF
U2
+5.3V
C11
1µF
R12 C13
120k 1µF
1
VIN
OUT_S
5
2
EN
OUT_F
6
3
SS
GND_F
7
4
FI LT
GND_S
8
VREF
R11
0.22
C12
22uF
REF6050IDGKR
GN D
GN D
GN D
GN D
Figure 2-2. Reference Input Drive
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3 Digital Interface
As noted in Section 1, the EVM interfaces with the PHI and communicates with the computer over the USB.
There are two devices on the EVM with which the PHI communicates: the ADS8860 ADC (over SPI) and the
EEPROM (over I2C). The EEPROM comes pre-programmed with the information required to configure and
initialize the ADS8860 platform. When the hardware is initialized, the EEPROM is no longer used.
3.1 Serial Interface (SPI)
The ADS8860 ADC uses an SPI serial communication in mode 1 (CPOL = 0, CPHA = 1) with high-speed clocks
higher than 30 MHz; for slower clocks, mode 0 is used (CPOL = 0, CPHA = 0). Because the serial clock (SCLK)
frequency can be as fast as 80 MHz, the ADS8860EVM offers 47-Ω resistors between the SPI signals and J2 to
aid with signal integrity. Typically, in high-speed SPI communication, fast signal edges can cause overshoot;
these 47-Ω resistors slow down the signal edges in order to minimize signal overshoot.
3.2 I2C Bus for the Onboard EEPROM
The circuit shown in Figure 3-1 is used with the EVM controler (PHI) for EVM identification. This circuit is not
required by the ADS8860 for operation. The switch (S2) is write protected and does not need to be changed for
EVM operation.
EV M_ID _PWR
EV M_ID_PWR
R8
C10
10.0k
U3
1
A0
VCC
8
2
A1
WP
7
3
A2
SCL
6
EVM_ID_SCL
VSS
SDA
5
EVM_ID_SDA
4
R9
10.0k
S2
1
100nF
GN D
2
3
BR24G32FVT-3AGE2
R16
GN D
EVM_ID_WP
0
GN D
Figure 3-1. EEPROM for the EVM ID
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4 Power Supplies
The PHI provides multiple power-supply options for the EVM, derived from the USB supply of the computer. The
EEPROM on the ADS8860EVM uses a 3.3-V power supply generated directly by the PHI. The EVM_REG_5V5
is a 5.5-V supply from the PHI and is applied to the input of two LDOs to generate other supplies on the EVM.
The analog supply of the ADC (AVDD = 3.3 V) is powered by the TPS7A4700RGWR (U11) LDO. A 5.3-V supply
is also generated using TPS7A4700RGWR (U9) LDO. This supply powers the voltage reference (U2) and
amplifier (U4). The ADC digital supply (DVDD = 3.3 V), is generated by the PHI. Three LEDs are connected to
the 5.3-V, AVDD, and DVDD supplies. These LEDs illuminate after the software GUI loads and the PHI turns on
its output power supplies.
TP9
PWR_+5V3
EVM_REG_5V5
+5.3V
U9
C33
15
16
1µF
C34
47uF
10V
13
OUT
OUT
IN
IN
EN
SENSE
1
20
R33
0.1
3
U10
GND
GND
5
1
3
RESET
VDD
4
5
6
8
9
10
11
12
CT
MR
GND
TPS3836K33DBVR
R35
0
4
2
GND
NR
6P4V2
6P4V1
3P2V
1P6V
0P8V
0P4V
0P2V
0P1V
NC
NC
NC
NC
GND
PAD
14
7
21
C35
47uF
10V
C36
1µF
19
18
17
2
GND
GND
TPS7A4700RGWR
R36
0
GND
R37 R38
R10
DNP
0
0
0
GND
GND
+5.3V
AVDD
TP10
AVDD
EVM_RAW_5V
R41
6.65k
U11
15
16
1
D4
LED
Green
2
D3
LED
Green
2
2
1
R40
6.65k
1
R39
6.65k
DVDD
D5
CMP-0002953-3
Green
C37
47uF
10V
R43
10.0k
13
AVDD
IN
IN
EN
OUT
OUT
SENSE
GND
GND
TP11
GND
GND
TP12
GND
TP13
GND
4
5
6
8
9
10
11
12
GND
R44
0
R45 R46
0
0
NR
6P4V2
6P4V1
3P2V
1P6V
0P8V
0P4V
0P2V
0P1V
NC
NC
NC
NC
GND
PAD
1
20
R42
0.1
3
14
C38
47uF
10V
C39
1µF
19
18
17
2
GND
GND
7
21
TPS7A4700RGWR
GND
GND
GND
GND
GND
Figure 4-1. Power Supplies, Regulators, and Indicators
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5 ADS8860EVM Initial Setup
This section explains the initial hardware and software setup procedure that must be completed for properly
operating the ADS8860EVM.
5.1 Software Installation
Download the latest version of the EVM GUI installer from the Tools and Software folder of the ADS8860EVM
and run the GUI installer to install the EVM GUI software on your computer.
CAUTION
Manually disable any antivirus software running on the computer before downloading the EVM GUI
installer onto the local hard disk. Depending on the antivirus settings, an error message may appear
or the installer. The exe file can be deleted.
Accept the license agreements and follow the on-screen instructions shown in Figure 5-1 to complete the
installation.
Figure 5-1. ADS8860 Software Installation Prompts
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As a part of the ADS8860EVM GUI installation, a prompt with a Device Driver Installation (as shown in Figure
5-2) appears on the screen. Click Next to proceed.
Figure 5-2. Device Driver Installation Wizard Prompts
The ADS8860EVM requires the LabVIEW™ run-time engine and may prompt for the installation of this software,
as shown in Figure 5-3, if not already installed.
Figure 5-3. LabVIEW Run-Time Engine Installation
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Verify that C:\Program Files (x86)\Texas Instruments\ADS8860EVM is as shown in Figure 5-4 after these
installations.
Figure 5-4. ADS8860EVM GUI Folder Post-Installation
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6 EVM Operation
The following instructions are a step-by-step guide to connecting the ADS8860EVM to the computer and
evaluating the performance of the ADS8860:
6.1 Connecting the Hardware
Connect the EVM as shown in Figure 6-1 after installing the software:
1. Physically connect P2 of the PHI to J2 of the ADS8860EVM. Install the screws to assure a robust connection.
2. Connect the USB on the PHI to the computer first.
• LED D5 on the PHI lights up, indicating that the PHI is powered up
• LEDs D1 and D2 on the PHI start blinking to indicate that the PHI is booted up and communicating with
the PC; Figure 6-1 shows the resulting LED indicators
3. Start the software GUI as shown in Figure 6-2. Notice that the LEDs blink slowly while the FPGA firmware is
loaded on the PHI. This process takes a few seconds, then the AVDD and DVDD power supplies turn on.
4. Connect the signal generator. The input range is 0 V to 5 V. A common input signal applied is a 4.9-VPP
signal with a 2.5-V offset. This signal is adjusted just below the full-scale range to avoid clipping.
1. Connect PHI to ADS8860EVM
and install screws.
D5
ADS8860EVM
PHI
D2
4. Input range = 0V to 5V
An AC full scale signal is
5Vpp with a 2.5V offset.
No jumper or other
configuration required.
D1
2. Connect USB power before
applying signal source.
3. Start the software GUI.
Figure 6-1. ADS8860EVM Hardware Setup and LED Indicators
Select EVM GUI
from start menu, or
associated shortcut
Figure 6-2. Launch the EVM GUI Software
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6.2 Using the Optional Precision Signal Injector (PSI)
The ADS8860 has excellent AC specifications (typically SNR = 93 dB, THD = -108 dB). Many commercial signal
generators cannot generate a signal with low enough noise and distortion to properly evaluate this device. Texas
Instruments offers a evaluation module that acts as a high-fidelity signal generator (for f = 2 kHz). This signal
generator uses a 2-kHz, fifth-order, band-pass filter to generate a very low noise, low distortion signal. Jumper
positions for single-ended operation are provided in Table 6-1. See the PSIEVM for more information on this
EVM.
USB control and
power
High fidelity sinusoidal
output signal
PSI Signal Source
ADS8860EVM
USB control and
power
PHI
Figure 6-3. PSI Signal Generator Connection
Table 6-1. Jumper Positions for PSI
Jumper
Position
Comment
JP1
FILT
Connects a 2-kHz filter
JP3
FILT
Connects a 2-kHz filter
JP4
VCM
Common-mode control for single-ended signals enabled
JP8
GND
Common-mode control for differential signals disabled
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6.3 EVM GUI Global Settings for ADC Control
Figure 6-4 shows that the EVM Global controls are located on the right hand side of the GUI. These controls
choose the page display, SPI mode, SCLK frequency, and sampling frequency.
Pages selects the
analysis display.
The SPI device modes can be
selected as described in the data
sheet.
The SCLK frequency is limited by the
sampling rate (e.g. for high
sampling rates a higher SCLK
frequency will be required)
The maximum sampling rate is
1MHz for this device.
Figure 6-4. EVM GUI Global Input Controls
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6.4 Time Domain Display
The time domain display tool allows visualization of the ADC response to a given input signal. This tool is useful
for both studying the behavior and debugging any gross problems with the ADC or drive circuits. The user can
trigger data capture of the selected number of samples from the ADS8860EVM, as per the current interface
mode settings indicated in Figure 6-5 by using the Capture button. The sample indices are on the x-axis and
there are two y-axes showing the corresponding output codes as well as the equivalent analog voltages based
on the specified reference voltage. Switching pages to any of the Analysis tools described in the subsequent
sections causes calculations to be performed on the same set of data.
Figure 6-5. Time Domain Display Tool Options
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6.5 Frequency Domain Display
The spectral analysis tool, shown in Figure 6-6, is intended to evaluate the dynamic performance (SNR, THD,
SFDR, SINAD, and ENOB) of the ADS8860 ADC through single-tone sinusoidal signal FFT analysis using the 7term Blackman-Harris window setting. The FFT tool includes windowing options that are required to mitigate the
effects of non-coherent sampling (this discussion is beyond the scope of this document). The 7-Term Blackman
Harris window is the default option and has sufficient dynamic range to resolve the frequency components of up
to a 24-bit ADC. The None option corresponds to not using a window (or using a rectangular window) and is not
recommended.
Figure 6-6. Spectral Analysis Tool
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6.6 Histogram Display
Noise degrades ADC resolution and the histogram tool can be used to estimate effective resolution, which is an
indicator of the number of bits of ADC resolution losses resulting from noise generated by the various sources
connected to the ADC when measuring a DC signal. The cumulative effect of noise coupling to the ADC output
from sources such as the input drive circuits, the reference drive circuit, the ADC power supply, and the ADC
itself is reflected in the standard deviation of the ADC output code histogram that is obtained by performing
multiple conversions of a DC input applied to a given channel. As shown in Figure 6-7, the histogram
corresponding to a DC input is displayed on clicking the Capture button.
Figure 6-7. Histogram Analysis Tool
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7 Bill of Materials, Schematics, and Layout
The bill of materials provided in Table 7-1 shows the PCB layouts for the ADS8860EVM.
7.1 Bill of Materials
Note
All components should be compliant with the European Union Restriction on Use of Hazardous
Substances (RoHS) directive. Some part numbers may be either leaded or RoHS. Verify that
purchased components are RoHS-compliant. (For more information about TI's position on RoHS
compliance, refer to www.ti.com.)
Table 7-1. ADS8860EVM Bill of Materials
Item #
1
2
3
4
Designator
!PCB1
@H3, @H4
C1
C2, C3, C6,
C11, C13, C33,
C36, C39
Quantity
Value
6
C10
8
9
10
C34, C35, C37,
C38
D1
D3, D4, D5
Any
Printed Circuit Board
2
MPMS 002
0005 PH
BF Fastener
Supply
MACHINE SCREW PAN
PHILLIPS M2
12
J1
0.01uF
C1608NP01H1
TDK
03J080AA
CAP, CERM, 0.01 uF, 50 V, +/5%, C0G/NP0, 0603
0603
8
1uF
C1608X7R1C1
TDK
05K
CAP, CERM, 1 µF, 16 V, +/10%, X7R, 0603
0603
4
10uF
Samsung
CL21A106KAF
ElectroN3NE
Mechanics
CAP, CERM, 10 uF, 25 V, +/10%, X5R, 0805
0805
1
0.1uF
C0603C104K5
Kemet
RACTU
CAP, CERM, 0.1 uF, 50 V, +/10%, X7R, 0603
0603
1
22uF
Samsung
CL21A226MAQ
ElectroNNNE
Mechanics
CAP, CERM, 22 uF, 25 V, +/20%, X5R, 0805
0805
4
47uF
C2012X5R1A4
TDK
76M125AC
CAP, CERM, 47 uF, 10 V, +/20%, X5R, 0805
0805
1
3.6V
MMSZ4685T1
G
3
Green
APT2012LZGC
Kingbright
K
ON
Diode, Zener, 3.6 V, 500 mW,
Semiconductor SOD-123
Wurth
Elektronik
LED, Green, SMD
15
16
17
16
R1
R2, R3, R4,
R5, R15
R6, R43
ADS8860EVM-PDK
LED_0805
ROUND
ROUND STANDOFF M2 STEEL
STANDOFF M2
5MM
STEEL 5MM
9774050243R
1
901-143-6RFX Amphenol RF
JACK, SMA, 50 Ohm, Gold, R/A, SMA Jack, 50
TH
Ohm, R/A, TH
1
QTH-030-01-LSamtec
D-A
Header(Shrouded), 19.7mil,
30x2, Gold, SMT
Header
(Shrouded),
19.7mil, 30x2,
SMT
1
THT-14-423-10 Brady
Thermal Transfer Printable
Labels, 0.650" W x 0.200" H 10,000 per roll
PCB Label
0.650 x 0.200
inch
LBL1
14
SOD-123
2
J2
13
Package
Reference
1
H3, H4
11
Description
DC106
C12
7
Manufacturer
1
C4, C5, C8, C9
5
Part Number
1
1.00k
RT0603BRB07
Yageo America RES, 1.00 k, 0.1%, 0.1 W, 0603
1KL
0603
5
49.9
CRCW040249
R9FKED
0402
2
10.0k
RT0402BRD07
RES, 10.0 k, .1%, .0625 W,
Yageo America
10KL
0402
Vishay-Dale
RES, 49.9, 1%, 0.063 W, AECQ200 Grade 0, 0402
0402
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Item #
18
19
20
21
22
23
24
25
26
27
Quantity
R7, R16, R35,
R36, R37, R38,
R44, R45, R46
9
0
CRCW0603000
Vishay-Dale
0Z0EA
RES, 0, 5%, 0.1 W, AEC-Q200
Grade 0, 0603
0603
2
10.0k
RC0603FR-071
Yageo
0KL
RES, 10.0 k, 1%, 0.1 W, 0603
0603
1
0.22
ERJ-3RQFR22
Panasonic
V
RES, 0.22, 1%, 0.1 W, AECQ200 Grade 0, 0603
0603
1
120k
RC0603FR-071
Yageo
20KL
RES, 120 k, 1%, 0.1 W, 0603
0603
2
24.9
CRCW060324
R9FKEA
RES, 24.9, 1%, 0.1 W, AECQ200 Grade 0, 0603
0603
2
0.1
ERJ-3RSFR10
Panasonic
V
RES, 0.1, 1%, 0.1 W, AEC-Q200
0603
Grade 0, 0603
3
6.65k
RC0603FR-076
Yageo
K65L
RES, 6.65 k, 1%, 0.1 W, 0603
0603
R8, R9
R11
R12
R13, R14
R33, R42
R39, R40, R41
S2
TP1, TP2, TP3,
TP4, TP5, TP6,
TP11, TP12,
TP13
TP9, TP10
Value
Part Number
Manufacturer
Vishay-Dale
28
CAS-120TA
Copal
Electronics
Switch, Slide, SPDT 100mA,
SMT
Switch,
5.4x2.5x2.5mm
9
5001
Keystone
Test Point, Miniature, Black, TH
Black Miniature
Testpoint
2
5005
Keystone
Test Point, Compact, Red, TH
Red Compact
Testpoint
1
ADS8860IDGS Texas
R
Instruments
16 bit 1 MSPS, Serial, PseudoDifferential Input, Micro Power,
Miniature, SAR ADC,
DGS0010A (VSSOP-10)
DGS0010A
1
REF6050IDGK Texas
R
Instruments
5ppm/C High-Precision Voltage
Reference with Integrated HighDGK0008A
Bandwidth Buffer, DGK0008A
(VSSOP-8)
1
BR24G32FVTRohm
3AGE2
I2C BUS EEPROM (2-Wire),
TSSOP-B8
1
OPA320AIDBV Texas
R
Instruments
Precision, 20 MHz, 0.9 pA Ib,
RRIO, CMOS Operational
Amplifier, 1.8 to 5.5 V, -40 to 125 DBV0005A
degC, 5-pin SOT23 (DBV5),
Green (RoHS & no Sb/Br)
2
TPS7A4700RG Texas
WR
Instruments
36V, 1A, 4.17μVRMS, RF LowDropout (LDO) Voltage
Regulator, RGW0020A
(VQFN-20)
1
TPS3836K33D Texas
BVR
Instruments
NanoPower Supervisory
DBV0005A
Circuits, DBV0005A (SOT-23-5)
GRM1885C1E
112JA01D
MuRata
CAP, CERM, 1100 pF, 25 V, +/5%, C0G/NP0, 0603
0603
N/A
N/A
Fiducial mark. There is nothing
to buy or mount.
N/A
RES, 0, 5%, 0.1 W, AEC-Q200
Grade 0, 0603
0603
U2
29
U3
U4
31
U9, U11
32
33
34
35
36
U10
C7
FID1, FID2,
FID3
R10
Description
1
U1
30
Package
Reference
Designator
1
1100pF
0
0
0
CRCW0603000
Vishay-Dale
0Z0EA
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TSSOP-8
RGW0020A
ADS8860EVM-PDK
17
www.ti.com
7.2 Board Layouts
Figure 7-1 and Figure 7-2 show the PCB layouts for the ADS8860EVM.
Note
Board layouts are not to scale. These figures are intended to show how the board is laid out; they are
not intended to be used for manufacturing ADS8860EVM PCBs.
Figure 7-1. ADS8860EVM PCB: Ground Layer
Figure 7-2. ADS8860EVM PCB: Bottom Layer (GND)
18
ADS8860EVM-PDK
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7.3 Schematics
This section provides the schematics for the ADS8860EVM.
GN D
1
Input_CH
C11
1µF
R1
R12 C13
120k 1µF
4
3
2
1
1.00k
GN D
TP1
INPU T
C1
0.01uF
VIN
GND_F
OUT_F
OUT_S
GN D
4
EN
GND_S
3
SS
U2
FI LT
REF6050IDGKR
+5.3V
GN D
5
6
7
8
1
+5.3V
C6
GN D
1µF
U4
GN D
R11
0.22
R13
24.9
R14
24.9
C12
22uF
GN D
TP6
VREF
OPA320AIDBVR
GN D
DV DD
C3
1µF
GN D
AV DD
C2
1µF
GN D
VREF
C7
DN P
1100pF
VREF
2
10
1
3
4
U1
WP
R2
R15
9
R5
R4
R3
7
5
GN D
C10
DV DD
S2
TP3
SDO
CONVST
GN D
D1
Ze ner
3.6V
DV DD
SDO
SDI
SCLK
RET_SCLK
GN D
EVM_ID_WP
0
3
2
1
TP2
TP4
TP5
CONVST SCLK SDI
49.9
R6
10.0k
49.9
49.9
49.9
49.9
EVM_ID_SCL
R16
R9
10.0k
EV M_ID _PWR
EVM_ID_SDA
100nF
6
GN D
5
7
8
EV M_ID_PWR
SCL
10.0k
R8
8
SCLK
CONVST 6
DIN
AVDD
DOUT
DVDD
REF
U3
A1
SDA
VCC
A2
BR24G32FVT-3AGE2
VSS
A0
GND
AINP
AINN
4
3
2
1
ADS8860IDGSR
GN D
C8
10uF
MP1
MP2
EV M_RAW_5V
2
4
C4
6
10uF
8
10
12
GN D
14
16
SDI
18
CONVST
20
22
SCLK
24
26
RET_SCLK
28
30
32
34
36
SDO
38
40
42
44
46
48
R7
50
52
0
54
EVM_ID_SDA
56
EVM_ID_SCL
58
EVM_PRSNT_N 60
GN D
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
GND
GND
PHI
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
GND
GND
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
MP3
MP4
EV M_REG_5V5
C5
10uF
GN D
GN D
C9
10uF
EVM_ID_WP
EV M_ID_PWR
GN D
19
ADS8860EVM-PDK
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J1
+5.3V
GN D
5
2
2
3
4
5
www.ti.com
EVM_REG_5V5
C33
GND
1µF
R35
0
GND
5
1
3
U10
VDD
CT
MR
TPS3836K33DBVR
D4
LED
Green
R40
6.65k
GND
TP13
GND
GND
RESET
GND
GND
4
2
GND
D5
CMP-0002953-3
Green
R41
6.65k
DVDD
1
2
AVDD
1
2
+5.3V
R39
6.65k
TP12
GND
D3
LED
Green
TP11
GND
GND
GND
GND
C34
47uF
10V
C37
47uF
10V
R45 R46
0
0
GND
R37 R38
R10
DNP
0
0
0
GND
R36
0
EVM_RAW_5V
R43
10.0k
GND
R44
0
GND
15
16
13
4
5
6
8
9
10
11
12
15
16
13
4
5
6
8
9
10
11
12
OUT
OUT
U9
IN
IN
SENSE
GND
PAD
NC
NC
NC
NC
NR
EN
6P4V2
6P4V1
3P2V
1P6V
0P8V
0P4V
0P2V
0P1V
TPS7A4700RGWR
OUT
OUT
U11
IN
IN
SENSE
GND
PAD
NC
NC
NC
NC
NR
EN
6P4V2
6P4V1
3P2V
1P6V
0P8V
0P4V
0P2V
0P1V
TPS7A4700RGWR
1
20
3
14
19
18
17
2
7
21
1
20
3
14
19
18
17
2
7
21
GND
GND
GND
GND
TP10
AVDD
TP9
PWR_+5V3
C36
1µF
C39
1µF
C35
47uF
10V
R33
0.1
GND
+5.3V
AVDD
C38
47uF
10V
R42
0.1
GND
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ADS8860EVM-PDK
20
1
2
www.ti.com
8 Reference
•
•
Texas Instruments: OPAx320xPrecision,20-MHz,0.9-pA,Low-Noise,RRIO, CMOSOperationalAmplifierWith
Shutdown Data Sheet
Texas Instruments: REF60xxHigh-PrecisionVoltageReferenceWith IntegratedADC Drive Buffer Data Sheet
9 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision * (September 2013) to Revision A (July 2020)
Page
• Updated the numbering format for tables, figures, and cross-references throughout the document..................3
• Changed document to reflect edits to the change in EVM controller platform....................................................3
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ADS8860EVM-PDK
21
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