STEVAL-AKI002V1 Evaluation Board for ADC1283 Analog to Digital Donverter User Manual
- October 30, 2023
- ST
Table of Contents
- Introduction
- Getting started
- How to use the board
- Communication with the ADC1283
- VREF measurement and inverter amplifier
- STEVAL-AKI002V1 versions
- Schematic diagram
- Bill of materials
- Regulatory compliance information
- IMPORTANT NOTICE – READ CAREFULLY
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
UM3086
User manual
Getting started with the STEVAL-AKI002V1 evaluation board for the ADC1283
analog-to-digital converter
Introduction
The STEVAL-AKI002V1 evaluation board allows evaluating the conversion
performance of the ADC1283 eight-channel analogto-digital converter, which is
designed for 50 ksps to 200 ksps conversion.
The board can accept external signals to measure and evaluate the ADC1283
conversion performance, based on its successive approximation register (SAR)
with an internal track-and-hold cell.
A reference voltage is also present on the board that can be connected to one
of the channels through a jumper.
The board can be supplied in standalone mode. It can also be connected to a
NUCLEO-L476RG development board hosting an STM32 microcontroller, which
enables further signal processing and PC communication.
To monitor the STEVAL-AKI002V1 performance, when connected to the NUCLEO-
L476RG, you can use the STSW-AKI GUI.
Getting started
1.1 Features
- Six direct inputs with RC filters (301 ohms/10 nF)
- One input switchable between a direct input and a reference voltage, given by a TS3431 buffered by a TSX711
- One input with a rail-to-rail amplifier (TSV772 with a gain equals to -1)
- SPI communication with Aardvark compatible pinout
1.2 Main components
1.2.1 ADC1283
The ADC1283 is a low-power, eight-channel CMOS 12-bit analog-to-digital
converter for conversion from 50 ksps
to 200 ksps, tested at 200 ksps (3.2 MHz clock frequency).
The architecture is based on a successive-approximation register with an
internal track-and-hold cell.
The ADC1283 features eight single-ended multiplexed inputs. The output serial
data is straight binary and is SPI compatible.
1.2.2 TS3431
The TS3431 is an adjustable shunt voltage reference with guaranteed
temperature stability over the entire operating temperature range (- 40°C to +
125°C).
The output voltage can be set to any value between 1.24 and 24 V through an
external resistor bridge.
Available in a SOT23-3 surface mount package, it can be used in application
designs where space saving is critical.
1.2.3 TSX711
The TSX711 operational amplifier offers high precision functioning with low
input offset voltage down to a maximum of 200 µV at 25°C. In addition, thanks
to its rail-to-rail input and output functionality, it can be used on a full
range input and output without limitations.
Thus, the TSX711 has the big advantage of offering a large span of supply
voltages, ranging from 2.7 to 16 V.
The low input bias current performance makes the device extremely suited when
used for signal conditioning in sensor interface applications.
The high ESD tolerance (4 kV HBM) and wide temperature range make the device
suitable also for the automotive market segment.
1.2.4 TSV7722
The TSV7722 is a 22 MHz-bandwidth unity-gain-stable amplifier. The input
offset voltage of 200 µV max. (50 µV typical) at room temperature, optimized
for common-mode close to ground, makes the device ideal for low-side current
measurements.
The TSV7722 can operate from 1.8 to 5.5 V single supply, on a load of 47 pF,
allowing an easy usage as A/D converter input buffer.
The device offers rail-to-rail output, excellent speed/power consumption
ratio, and 22 MHz gain bandwidth product, while consuming just 1.7 mA at 5 V.
It also features an ultra-low input bias current that enables the connection
to photodiodes and other sensors where the current is the key value to be
measured.
These features make the TSV7722 ideal for high-accuracy, high-bandwidth sensor
interfaces.
How to use the board
To use the board, follow the procedure below.
Step 1. Connect the power generators to AVCC and DVCC connectors.
The allowed voltages for AVCC and DVCC are 2.7 to 5.5 V.
Step 3. When using the STSW-AKI GUI, refer to the table below for the
connection between the STEVALAKI002V1 SPI pins and the NUCLEO-L476RG pins.
Table 1. Pinout connection between the STEVAL-AKI002V1 and the NUCLEO-
L476RG
| NUCLEO-L476RG pin | STEVAL-AKI002V1 SPI pin |
|---|---|
| PB12 | Chip select |
| PB13 | SCLK |
| PB14 | MISO |
| PB15 | MOSI |
Step 4. Connect your inputs.
Step 4a. IN0-IN5: direct inputs with RC filters (301 ohms/10 nF).
Step 4b. IN6: input switchable through the J07 jumper between a direct
input and a reference voltage given by a TS3431 and buffered by a TSX711.
Step 4c. IN7: input with a rail-to-rail amplifier, TSV772, with a gain
equals to -1.
Communication with the ADC1283
Option A: use the STSW-AKI GUI
The STEVAL-AKI002V1 can be used with the STSW-AKI GUI. To use it. It is
necessary to use a nucleo-64 L476RG.
The STSW-AKI runs on an STM32 Nucleo-64 development board. It communicates
with the ADC1283 of the STEVAL-AKI002V1 through the SPI protocol at 125 ksps.
The STSW-AKI allows the user to monitor each channel and plot data on a graph.
It is also a tool to save values measured by the ADC1283 in a .csv file.
For more information on the STSW-AKI GUI, go to the relevant ST web page.
Option B: use the STEVAL-AKI002V1 directly with your test
solution
The STEVAL-AKI002V1 can be plugged directly to your solution.
The SPI communication to access to the ADC1283 registers giving access to the
measured values of each channel is shown in the next tables.
Table 2. Control register bits
| Bit # | 7 (MSB) | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|
| Symbol | DONTC | DONTC | ADD2 | ADD1 | ADD0 | DONTC | DONTC | DONTC |
Table 3. Control register bit description
| Bit # | Symbol | Description |
|---|---|---|
| 7, 6, 2, 1, 0 | DONTC | Don’t care |
| 5 | ADD2 | These bits determine which input channel is converted, as per Table 4 |
| 4 | ADD1 | |
| 3 | ADD0 |
Table 4. Input channel description
| ADD2 | ADD1 | ADD0 | Address value (h) | Input channel |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | IN0 |
| 0 | 0 | 1 | 8 | IN1 |
| 0 | 1 | 0 | 10 | IN2 |
| 0 | 1 | 1 | 18 | IN3 |
| 1 | 0 | 0 | 20 | IN4 |
| 1 | 0 | 1 | 28 | IN5 |
| 1 | 1 | 0 | 30 | IN6 |
| 1 | 1 | 1 | 38 | IN7 |
VREF measurement and inverter amplifier
A) 1.8 V reference voltage on channel 6
The STEVAL-AKI002V1 includes a reference voltage based on a TS3431 and
buffered by a TSX711.
This reference voltage can be measured on the channel IN6 by selecting “REF”
on the J07 jumper.
The reference voltage varies slightly according to the voltage supply. It is
still stable around 1.8 V. Hence, it is possible to use it to control the
voltage supply applied on the ADC1283 and calibrate it.
B)
Inverter amplifier with a gain of -1 on IN7
On the IN7 input, a TSV772 is used in the inverter function with a gain of -1.
This gives the opportunity to test the functionality of the TSV772 and measure
negative values through the ADC1283.
This inverter is directly connected to IN7. The negative value between -AVCC
and GND must be applied on IN7.
STEVAL-AKI002V1 versions
Table 5. STEVAL-AKI002V1 versions
| PCB version | Schematic diagrams | Bill of materials |
|---|---|---|
| STEVAL$AKI002V1A ¹ | STEVAL$AKI002V1A schematic diagrams | STEVAL$AKI002V1A bill |
of materials
Schematic diagram
Bill of materials
Table 6. STEVAL-AKI002V1 bill of materials
Item| Q.ty| Ref.| Part/value| Description| Manufacturer|
Order code
---|---|---|---|---|---|---
1| 2| C01, C03| 22µF C case 25V ±20%| Tantalum capacitors| KEMET|
T491C226M025AT
2| 3| C02, C04, C21| 100nF SMT 0603 50V ±10%| Ceramic capacitors| WURTH
ELEKTRONIK| 885012206095
3| 9| C10, C11, C12, C13, C14, C15, C16, C24, C32| 10nF SMT 0603 50V ±10%|
Ceramic capacitors| WURTH ELEKTRONIK| 885012206089
4| 1| C22| 10µF SMT 0603 25V ±10%| Ceramic capacitors| MURATA|
GRM21BR61E106KA73L
5| 2| C23, C31| 22nF SMT 0603 50V ±10%| Ceramic capacitors| WURTH ELEKTRONIK|
885012206091
6| 1| D01| COLOR GREEN SMT 0603 2V 20mA| LED| WURTH ELEKTRONIK| 150060VS55040
7| 1| D02| COLOR RED SMT 0603 2V 20mA| LED| WURTH ELEKTRONIC| 150060RS55040
8| 1| J01| COLOR GREY HORIZONTAL TEST JACK 2MM 2100 V 5A| Test jack| JOHNSON –
CINCH CONNECTIVIT Y| 105-0754-001
9| 2| J02, J05| COLOR BLACK HORIZONTAL TEST JACK 2MM 2100 V 5A| Test jack|
JOHNSON – CINCH CONNECTIVIT Y| 105-0753-001
10| 2| J03, J06| SIP 1X2 MALE SIP 2 STEP 2.54MM 250VAC 3A| Pin header| WURTH
ELEKTRONIK| 61300211121
11| 1| J04| COLOR RED HORIZONTAL TEST JACK 2MM 2100 V 5A| ****
Test jack
| JOHNSON – CINCH CONNECTIVIT Y| ****
105-0752-001
12| 1| J07| SIP 1X3 MALE SIP 1X3 STEP 2.54MM 250VAC 3A| Connector header|
WURTH ELEKTRONIC| 61300311121
13| 1| J08| SIP 2X10 MALE SIP 2X5 STEP 2.54MM 250VAC 3A| Pin header| WURTH
ELEKTRONIK| 61301021121
14| 2| J11, J12| SIP 1X8 MALE SIP 1X8 STEP 2.54MM 250VAC 3A| Pin header| WURTH
ELEKTRONIK| 61300811121
15| 1| JU07| COLOR BLACK STEP 2.54 MM 250VAC 3A| Jumper| WURTH ELEKTRONIK|
609002115121
16| 4| M-01, M-02,M-03, M-04| 10MM HOLE M2| Threaded spacer| WURTH ELEKTRONIK|
970100244
17| 4| M-05, M-06, M-07, M-08| 6MM HOLE M3| Screw| MULTICOMP PRO| MP006574
Item| Q.ty| Ref.| Part/value| Description|
Manufacturer|
Order code
---|---|---|---|---|---|---
18| 1| R01, R102| 680R SMT 0603 0.25W±1%| Resistor| PANASONIC| ERJPA3F6800V
19| 1| R03| NC SMT 0603 ±1%| Resistor (not mounted)| PANASONIC| ERJPA3F49R9V
20| 7| R10, R11, R12, R13, R14, R15, R16| 301R SMT 0603 0.25W±1%| Resistor|
PANASONIC| ERJPA3F3010V
21| 1| R21| 449R SMT 0603 ±1%| Resistor| PANASONIC| ERJPA3F4990V
22| 1| R22| 1.8K SMT 0603 0.1%| Resistor| YAGEO| RT0603BRD071K8L
23| 1| R23| 3.9K SMT 0603 0.1%| Resistor| YAGEO| RT0603BRD073K9L
24| 2| R24, R33| 330R SMT 0603 ±1%| Resistor| PANASONIC| ERJPA3F3300V
25| 2| R31, R32| 10K SMT 0603 ±1%| Resistor| PANASONIC| ERJPA3F1002V
26| 1| U01| ADC1283IPT, TSSOP-16L| 8-channel, 50 ksps to 200 ksps, 12-bit A-D
converter| ST|
ADC1283IPT
27| 1| U21| TS3431CILT, SOT23| 1.24 V adjustable shunt voltage reference| ST|
TS3431CILT
28| 1| U22| TSX711ILT, SOT23-5L| Precision (200 µV), rail-to-rail 16 V CMOS
op-amp, single, GBP 2.7 MHz| ST|
TSX711ILT
29| 1| U31| TSV7722IST, MiniSO-8| High bandwidth (22 MHz) low offset (200 µV)
low-rail 5 V op- amp| ST|
TSV7722IST
Regulatory compliance information
Notice for US Federal Communication Commission (FCC)
For evaluation only; not FCC approved for resale
FCC NOTICE – This kit is designed to allow:
(1) Product developers to evaluate electronic components, circuitry, or
software associated with the kit to determine whether to incorporate such
items in a finished product and
(2) Software developers to write software applications for use with the end
product.
This kit is not a finished product and when assembled may not be resold or
otherwise marketed unless all required FCC equipment authorizations are first
obtained. Operation is subject to the condition that this product not cause
harmful interference to licensed radio stations and that this product accept
harmful interference. Unless the assembled kit is designed to operate under
part 15, part 18 or part 95 of this chapter, the operator of the kit must
operate under the authority of an FCC license holder or must secure an
experimental authorization under part 5 of this chapter 3.1.2.
Notice for Innovation, Science and Economic Development Canada (ISED)
For evaluation purposes only. This kit generates, uses, and can radiate radio
frequency energy and has not been tested for compliance with the limits of
computing devices pursuant to Industry Canada (IC) rules.
Notice for the European Union
This device is in conformity with the essential requirements of the Directive
2014/30/EU (EMC) and of the Directive 2015/863/EU (RoHS).
Notice for the United Kingdom
This device is in compliance with the UK Electromagnetic Compatibility
Regulations 2016 (UK S.I. 2016 No. 1091) and with the Restriction of the Use
of Certain Hazardous Substances in Electrical and Electronic Equipment
Regulations 2012 (UK S.I. 2012 No. 3032).
Table 7. Document revision history
| Date | Revision | Changes |
|---|---|---|
| 8-Mar-23 | 1 | Initial release. |
IMPORTANT NOTICE – READ CAREFULLY
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Information in this document supersedes and replaces information previously
supplied in any prior versions of this document. © 2023 STMicroelectronics –
All rights reserved
References
- STMicroelectronics: Our technology starts with you
- STMicroelectronics Trademark List - STMicroelectronics
- ADC1283 - 8-Channel, 50ksps to 200ksps, 12-Bit A/D Converter - STMicroelectronics
- NUCLEO-L476RG - STM32 Nucleo-64 development board with STM32L476RG MCU, supports Arduino and ST morpho connectivity - STMicroelectronics
- STEVAL-AKI002V1 - Evaluation board for the ADC1283 8-channel, 50 to 200 ksps, 12-bit analog to digital converter - STMicroelectronics
- STSW-AKI - Graphical user interface for the STEVAL-AKI001V1/STEVAL-AKI002V1 boards - STMicroelectronics
- TS3431 - 1.24 V adjustable shunt voltage reference - STMicroelectronics
- TSV772 - High bandwidth (20 MHz) low offset (200 µV) rail-to-rail 5V op amp - STMicroelectronics
- TSV7722 - High bandwidth (22MHz) Low offset (200 µV) low-rail 5V op amp - STMicroelectronics
- TSX711 - Precision (200uV), rail-to-rail 16V CMOS Op-Amp, single, GBP 2.7MHz - STMicroelectronics
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