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UM3160
User manual
Getting started with the EVAL-RHFAD128V2 evaluation board for the RHFAD128
analog-to-digital converter
Introduction
The
EVAL-RHFAD128V2
evaluation board allows evaluating the conversion performance of the
RHFAD128
eight-channel
analog-to-digital converter, which is designed for 50 ksps to 1 Msps conversion.
The board can accept external signals to measure and evaluate the
RHFAD128
conversion performance, based on its
successive approximation register (SAR) with an internal track-and-hold cell.
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
EVAL-RHFAD128V2
performance, when connected to the NUCLEO-L476RG, the RHFAD128_GUI can be used.
Figure 1.
EVAL-RHFAD128V2 evaluation board
UM3160 - Rev 1 - May 2023
www.st.com
For further information contact your local STMicroelectronics sales office.
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Summary of Contents for STI EVAL-RHFAD128V2
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Page 1: Figure 1. Eval-Rhfad128V2 Evaluation Board
UM3160 User manual Getting started with the EVAL-RHFAD128V2 evaluation board for the RHFAD128 analog-to-digital converter Introduction EVAL-RHFAD128V2 evaluation board allows evaluating the conversion performance of the RHFAD128 eight-channel analog-to-digital converter, which is designed for 50 ksps to 1 Msps conversion. -
Page 2: Getting Started
Standard SPI communication pinout • Numerous test-points 1. The RHF100 is not mounted on the EVAL-RHFAD128V2. However, the footprint is available on the board. 2. The RHF43B is not mounted on the EVAL-RHFAD128V2. However, the footprint is available on the board. Main components 1.2.1... -
Page 3: Rhf43B
UM3160 Main components 1.2.3 RHF43B The RHF43B operational amplifier offers high precision functioning with low input. Rail-to-rail output. It has the following features embedded: • Bandwidth: 8 MHz gain at 16 V • Low input offset voltage: 100 μV typ. •... -
Page 4: How To Use The Board
Step 3. When using the RHFAD128_GUI GUI, refer to the table below for the connection between the EVAL- RHFAD128V2 SPI pins and the NUCLEO-L476RG pins. Table 1. Pinout connection between the EVAL-RHFAD128V2 and the NUCLEO-L476RG NUCLEO-L476RG pin EVAL-RHFAD128V2 SPI pin... -
Page 5: Figure 4. Board Section For Input Connection
UM3160 How to use the board Step 4. Connect your inputs. Step 4a. IN1, IN2, IN3, IN4, IN6, and IN7: direct inputs with RC filters (for example 200 Ω / 10 nF is a good combination at FCLK = 500 KHz). Step 4b. -
Page 6: Communication With The Rhfad128
Communication with the RHFAD128 Option A: use the STSW-AKI GUI The EVAL-RHFAD128V2 can be used with the STSW-AKI GUI. To use it, it is necessary to use a Nucleo-64 L476RG. The RHFAD128_GUI runs on an STM32 Nucleo-64 development board. It communicates with the RHFAD128 of the EVAL-RHFAD128V2 through the SPI protocol at 125 ksps. -
Page 7: Option B: Use The Eval-Rhfad128V2 Directly With Your Test Solution
UM3160 Option B: use the EVAL-RHFAD128V2 directly with your test solution Option B: use the EVAL-RHFAD128V2 directly with your test solution The EVAL-RHFAD128V2 can be plugged directly to your solution. The SPI communication to access the RHFAD128 registers giving access to the measured values of each channel is shown in the following tables. -
Page 8: The Use Of Rhf43B And Rhf100
UM3160 The use of RHF43B and RHF100 The use of RHF43B and RHF100 1.2 V reference voltage on channel 0 The RHF100 is not mounted on board. The RHF100 reference voltage can be measured on the channel IN0. By default, the R42 value can be 0 Ω. However, R42 = 200 Ω and C42 = 10 nF can be a good combination for low-pass filter at FCLK = 500 KHz. -
Page 9: Mode 1: Low-Side Current Sensing
UM3160 Current sensing Figure 7. RHF100 and RHF43B power supply setup Figure 8 is an extract of the board schematic. It shows the different modes to measure the amplifier output voltage. 4.2.1 Mode 1: Low-side current sensing An external load could be connected to the connector J22. The current through this load is measured by the following setup: •... -
Page 10: Mode 3: Custom Input Voltage
UM3160 Current sensing The measured current through the shunt resistance R21 is: Case 1: REF voltage is not used: • R24 = R26 • Vout = I * R21 * Gain • I = Vout / (Gain * R21) Case 2: REF voltage is used: •... -
Page 11: Eval-Rhfad128V2 Versions
EVAL-RHFAD128V2 versions PCB version Schematic diagrams Bill of materials EVAL-RHFAD128V2 EVAL-RHFAD128V2 schematic diagrams EVAL-RHFAD128V2 bill of materials 1. This code identifies the EVAL-RHFAD128V2 expansion board first version. It is printed on the board PCB. UM3160 - Rev 1 page 11/23... -
Page 12: Schematic Diagrams
Schematic diagrams Figure 9. EVAL-RHFAD128V2 board schematic... -
Page 13: Figure 10. Eval-Rhfad128V2 Board Pcb Top Layer
Figure 10. EVAL-RHFAD128V2 board PCB top layer... -
Page 14: Figure 11. Eval-Rhfad128V2 Board Pcb Bottom Layer
Figure 11. EVAL-RHFAD128V2 board PCB bottom layer... -
Page 15: Figure 12. Eval-Rhfad128V2 Board Pcb Top Overlay
Figure 12. EVAL-RHFAD128V2 board PCB top overlay... -
Page 16: Bill Of Materials
UM3160 Bill of materials Bill of materials Table 6. EVAL-RHFAD128V2 bill of materials Quant Manufacturer’s part Item Reference Value Package Description Voltage Manufacturer number C01, C03, CAPACITOR - C31, C32, 1µF SMT 0805 WURTH ELEKTRONIK 885012207078 CERAMIC C33, C34 C02, C04,... - Page 17 UM3160 Bill of materials Quant Manufacturer’s part Item Reference Value Package Description Voltage Manufacturer number BLACK STEP JU23 JUMPER 250VAC WURTH ELEKTRONIK 609002115121 COLOR 2.54MM YELLOW STEP JU24 JUMPER 650VAC 251-8525 COLOR 2.54MM STEP JU35 JUMPER 250VAC Harwin M7681-05 COLOR 2.54MM BLUE STEP...
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Page 18: Regulatory Compliance Information
UM3160 Regulatory compliance information 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: 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 software developers to write software applications for use with the end product. -
Page 19: Revision History
UM3160 Revision history Table 7. Document revision history Date Version Changes 24-May-2023 Initial release. UM3160 - Rev 1 page 19/23... -
Page 20: Table Of Contents
Option A: use the STSW-AKI GUI..........6 Option B: use the EVAL-RHFAD128V2 directly with your test solution ....7 The use of RHF43B and RHF100 . - Page 21 List of tables Table 1. Pinout connection between the EVAL-RHFAD128V2 and the NUCLEO-L476RG ......4 Table 2.
- Page 22 EVAL-RHFAD128V2 board PCB bottom layer ........
- Page 23 UM3160 IMPORTANT NOTICE – READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgment.
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