AMC1204EVM

User's Guide SBAU178A – August 2010 – Revised May 2014 AMC1204EVM This user's guide describes the characteristics, operation, and use of the AMC1204EVM. The AMC1204EVM is designed for prototyping and evaluation. A complete circuit description, schematic diagram, and bill of materials are included. The following related documents are available through the Texas Instruments web site at www.ti.com. Table 1. Related Documentation 1 2 3 4 5 6 Device Literature Number AMC1204 SBAS512 AMC1210 SBAS372 SN6501 SLLSEA0 Contents Overview ...................................................................................................................... 1.1 Features .............................................................................................................. 1.2 Introduction .......................................................................................................... Analog Interface.............................................................................................................. 2.1 Analog Inputs ........................................................................................................ Digital Interface .............................................................................................................. Power-Supplies .............................................................................................................. EVM Set-up and Operation ................................................................................................. 5.1 Isolated Power and Analog Inputs: J1, J3, and J4 ............................................................. 5.2 Device Operation ................................................................................................... BOM, Schematic, and Layout .............................................................................................. 6.1 Printed Circuit Board Layout ...................................................................................... 6.2 Schematic ............................................................................................................ 6.3 Bill of Materials ...................................................................................................... All trademarks are the property of their respective owners. SBAU178A – August 2010 – Revised May 2014 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated AMC1204EVM 2 2 2 2 2 3 3 4 4 4 5 5 5 6 1 Overview www.ti.com 1 Overview 1.1 Features • • • • • 1.2 Full-featured evaluation module for the AMC1204 single-channel, ΔΣ modulator 9-pin sub-D connector for interfacing to the AMC1210 digital filter evaluation module Screw terminals for easy access to analog inputs Two package options included: – AMC1204DW – AMC1204DWV Optional isolated power to VDD1 from VDD2 Introduction The AMC1204 is a 1-bit modulator with an output buffer separated from the input interface circuitry by a silicon dioxide (SiO2) isolation barrier. The isolation barrier provides galvanic isolation of up to 4000 VPEAK. When used in combination with the AMC1210 or other digital filter, the AMC1204 can be used to achieve 16-bit analog-to-digital (A/D) conversion with no missing codes. For use in high-resolution measurement applications, an effective accuracy of 14 bits can be obtained with a digital filter bandwidth of 20 kHz at a modulator rate of 10 MHz. Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with the AMC1204EVM. 2 Analog Interface There are two AMC1204 devices installed on the EVM. Both of the analog inputs to the AMC1204 are routed from the two-wire screw terminals at J3 and J4. These screw terminals give the user access to the inverting and noninverting inputs of the AMC1204 devices installed at U1 and U2. 2.1 Analog Inputs The analog inputs to the AMC1204EVM printed circuit board (PCB) consists of simple RC filter circuits. Connectors J3 and J4 have identical configurations. An example input circuit for the AMC1204 is shown in Figure 1. R1 IN+ 12 R2 C3 330pF IN- 12 J4 C4 10pF C5 10pF 2 1 ISOGND Figure 1. AMC1204EVM Schematic: Analog Input Section 2 AMC1204EVM SBAU178A – August 2010 – Revised May 2014 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated Digital Interface www.ti.com 3 Digital Interface The AMC1204EVM is designed for use with digital filters such as the AMC1210. The output and power for the two AMC1204 devices are routed to a 9-pin, female, D-type connector. The VDD2 power to the AMC1204 devices, as well as the modulator data and clock outputs from the devices under test, are routed to J2, as Figure 2 illustrates. VDD2 C2 4.7uF 1 6 2 7 3 8 4 9 5 VDD2 C1 VDD2 CLKIN DATA GND2 8 7 0.1uF J2 6 5 VDD2 C13 VDD2 CLKIN DATA GND2 GND1 14 13 0.1uF 11 16 9 Figure 2. Power and Digital Outputs 4 Power-Supplies J2 provides access to the +5 VA for the VDD2 supply. All power to the board should be sourced from a well-regulated, linear supply that has current limiting capabilities. Power is to be applied through J2. Table 2 describes the pinout for J2. Table 2. J2: Power Supply and Digital Outputs Signal Pin Number Signal Ground 1 2 Not used 4.5 to 5.5 VDD2 supply 3 4 Not used Ground 5 6 CLKIN for U4 CLKIN for U1 7 8 DATA output for U1 DATA output for U4 9 — N/A For standalone operation, power sources can also be applied via a mating connector to J2, and the digital output data stream can be wired directly to an FPGA or other digital filter module for further processing. Refer to Figure 2 or the schematic appended to the end of this document for additional details. SBAU178A – August 2010 – Revised May 2014 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated AMC1204EVM 3 EVM Set-up and Operation 5 www.ti.com EVM Set-up and Operation This section describes the general operation of the AMC1204EVM. 5.1 Isolated Power and Analog Inputs: J1, J3, and J4 In the EVM default configuration, VDD1 is provided by VDD2 by means of an isolation transformer and the SN6501 transformer driver. This configuration provides a regulated 5-V source to VDD1. For power provided from high-side isolated rails (such as from a gate drive supply), move the shunt on jumper JP1 to cover pins 1 and 2. Use a voltage between 4.5 VDC and 5.5 VDC for the user-applied VDD1 supply. The isolated power input to the AMC1204EVM printed circuit board (PCB) can be applied directly to J1, pins 1 and 2. Table 3 lists the details of J1. Table 3. J1: Isolated Power Pin Number Signal J1.1 5 VISO J1.2 ISOGND Description Connection to the AMC1204 VDD1 terminal Connection to the AMC1204 GND1 pin The analog inputs to the AMC1204EVM PCB can be applied directly to J3 and J4, pins 1 and 2. Table 4 lists the details of J3 and J4. CAUTION Carefully review the AMC1204 product data sheet for the limitations of the analog input range, and ensure that the appropriate analog/digital voltages are applied before connecting any analog input to the EVM. Table 4. J3 and J4: Analog Inputs 5.2 Pin Number Signal Description J3.1 IN+ Noninverting input to U4 J3.2 IN– Inverting input to U4 J4.1 IN+ Noninverting input to U1 J4.2 IN– Inverting input to U1 Device Operation Once the analog and digital power sources are applied to the AMC1204EVM, the digital outputs become active upon the application of an external modulator clock source. The internal reference of the AMC1204 is used as the conversion reference. Additionally, an analog input signal may be applied directly at screw terminals J3 and J4. See Figure 1 and Table 4 for more details. The analog input range, (VIN+) – (VIN–), is ±250 mV. As the input voltage approaches the maximum input level of +250 mV, the 1s density of the modulator output approaches 92%. Likewise, when the input voltage approaches the lower limit of –250 mV, the 1s density is approximately 8%. 4 AMC1204EVM SBAU178A – August 2010 – Revised May 2014 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated BOM, Schematic, and Layout www.ti.com 6 BOM, Schematic, and Layout This section contains the complete bill of materials, schematic diagram, and PCB layout for the AMC1204EVM. NOTE: Board layouts are not to scale. These are intended to show how the board is laid out; they are not intended to be used for manufacturing AMC1204EVM PCBs. 6.1 Printed Circuit Board Layout Figure 3. AMC1204EVM Silk Screen Drawing 6.2 Schematic The AMC1204EVM schematic is appended to the end of this document. SBAU178A – August 2010 – Revised May 2014 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated AMC1204EVM 5 BOM, Schematic, and Layout 6.3 www.ti.com Bill of Materials Table 5. AMC1204EVM Bill of Materials 6 Item Qty Reference Designator Description Manufacturer Mfr Part Number 1 1 — Printed circuit board Any 6520713 2 5 C1, C6, C10, C12, C13 CAP, CERM, 0.1uF, 50V, +/-10%, X7R, 0603 AVX 06035C104KAT2A 3 2 C2, C7 CAP, CERM, 4.7uF, 25V, +/-10%, X5R, 0805 TDK C2012X5R1E475K 125AB 4 2 C3, C14 CAP, CERM, 330pF, 50V, +/-5%, C0G/NP0, 0603 TDK C1608C0G1H331J 5 4 C4, C5, C15, C16 CAP, CERM, 10pF, 50V, +/-5%, C0G/NP0, 0603 TDK C1608C0G1H100D 6 1 C8 CAP, CERM, 1uF, 25V, +/-10%, X7R, 0603 TDK C1608X7R1E105K 080AB 7 2 C9, C11 CAP, TA, 10uF, 16V, +/-20%, 1.5 ohm, SMD AVX F971C106MCC 8 2 D1, D2 Diode, Schottky, 20V, 0.5A, SOD-123 9 3 J1, J3, J4 10 1 J2 ON Semiconductor MBR0520LT1G Terminal Block, 6A, 3.5mm Pitch, 2-Pos, TH CONN DB9 FEMALE R/A SOLDER SMD Header, TH, 100mil, 3x1, Gold plated, 230 mil above insulator On Shore Techonology ED555/2DS NorComp 190-009-263R001 Samtec TSW-103-07-G-S 11 1 JP1 12 4 R1, R2, R3, R4 13 1 T1 Transformer, 45.6 uH SMT Texas Instruments AMC1204BDWV RES, 12.0 ohm, 1%, 0.1W, 0603 Yageo America RC0603FR0712RL Coilcraft DA2303-ALB 14 1 U1 20MHz, Second-Order, Isolated Delta-Sigma Modulator for Current-Shunt Measurement, DWV0008A 15 1 U2 LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATOR, DBV0005A Texas Instruments TPS76350DBV 16 1 U3 Transformer Driver for Isolated Power Supplies, DBV0005A Texas Instruments SN6501DBV 17 1 U4 20MHz, Second-Order, Isolated Delta-Sigma Modulator for Current-Shunt Measurement, DW0016A Texas Instruments AMC1204BDW AMC1204EVM SBAU178A – August 2010 – Revised May 2014 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated Revision History www.ti.com Revision History Changes from Original (August 2010) to A Revision ..................................................................................................... Page • • • • • • • • • • • Added SN6501 device to Table 1 ....................................................................................................... Added two new bullets to Section 1.1 .................................................................................................. Changed Section 2 ........................................................................................................................ Changed Section 2.1 ..................................................................................................................... Changed Section 3 ........................................................................................................................ Changed Figure 2 ......................................................................................................................... Changed Table 2 .......................................................................................................................... Changed Section 5.1 ..................................................................................................................... Changed Table 4 .......................................................................................................................... Changed schematic diagram ............................................................................................................ Changed Figure 3 ......................................................................................................................... 1 2 2 2 3 3 3 4 4 5 5 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. SBAU178A – August 2010 – Revised May 2014 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated Revision History 7 1 2 3 4 5 6 A A 5Viso VDD2 2 C8 1μF J1 1 2 JP1 1 D1 U2 3 5 C7 C9 10μF 4.7μF OUT 1 IN 2 GND EN 2 6 TPS76350DBV GND GND 3 1 MBR0520LT1G 20V C11 10μF 0.1μF 3 4 7 U3 C10 4 NC 8 T1 2 3 D2 GND GND 5 B D1 GND D2 GND 5 SN6501DBV 1 DA2303-ALB MBR0520LT1G 20V 4 VCC B GND GND VDD2 C2 5Viso C6 0.1μF R1 C1 GND 1 J4 R2 GND 0.1μF J2 U1 12.0 1 2 4.7μF VDD2 C3 2 330pF 3 12.0 4 C C4 C5 10pF 10pF AVDD DVDD VINP DOUT VINN CLKIN AGND DGND GND 8 1 6 2 7 3 8 4 9 5 6 7 5 AMC1204DWV GND GND GND GND 5Viso C12 C 190-009-263R001 VDD2 0.1μF C13 0.1μF U4 R3 J3 GND 12.0 1 C14 1 2 2 330pF R4 3 12.0 C15 C16 10pF 10pF 4 8 5 6 7 GND GND D AVDD DVDD VINP DATA VINN CLKIN AGND AGND DGND DGND NC NC NC NC NC NC AMC1204DW GND 14 11 13 16 9 15 12 10 GND D Texas Instruments and/or its licensors do not warrant the accuracy or completeness of this specification or any information contained therein. Texas Instruments and/or its licensors do not warrant that this design will meet the specifications, will be suitable for your application or fit for any particular purpose, or will operate in an implementation. Texas Instruments and/or its licensors do not warrant that the design is production worthy. You should completely validate and test your design implementation to confirm the system functionality for your application. 1 2 3 4 Number: 6520713 Rev: B SVN Rev: Not in version control Drawn By: Engineer: Enter name of project lead 5 Mod. Date: 2/10/2014 Designed for: Public Release Project Title: Change in menu Project|Project Options|Parameters Sheet Title: Assembly Variant: Variant name not interpreted Sheet: 1 of 1 File: amc1204_b.SchDoc Size: B Contact: http://www.ti.com/support 6 http://www.ti.com © Texas Instruments 2013 ADDITIONAL TERMS AND CONDITIONS, WARNINGS, RESTRICTIONS, AND DISCLAIMERS FOR EVALUATION MODULES Texas Instruments Incorporated (TI) markets, sells, and loans all evaluation boards, kits, and/or modules (EVMs) pursuant to, and user expressly acknowledges, represents, and agrees, and takes sole responsibility and risk with respect to, the following: 1. User agrees and acknowledges that EVMs are intended to be handled and used for feasibility evaluation only in laboratory and/or development environments. Notwithstanding the foregoing, in certain instances, TI makes certain EVMs available to users that do not handle and use EVMs solely for feasibility evaluation only in laboratory and/or development environments, but may use EVMs in a hobbyist environment. All EVMs made available to hobbyist users are FCC certified, as applicable. Hobbyist users acknowledge, agree, and shall comply with all applicable terms, conditions, warnings, and restrictions in this document and are subject to the disclaimer and indemnity provisions included in this document. 2. Unless otherwise indicated, EVMs are not finished products and not intended for consumer use. EVMs are intended solely for use by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems, and subsystems. 3. User agrees that EVMs shall not be used as, or incorporated into, all or any part of a finished product. 4. 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User shall employ reasonable safeguards to ensure that user’s use of EVMs will not result in any property damage, injury or death, even if EVMs should fail to perform as described or expected. 12. User shall be solely responsible for proper disposal and recycling of EVMs consistent with all applicable federal, state, and local requirements. Certain Instructions. User shall operate EVMs within TI’s recommended specifications and environmental considerations per the user’s guide, accompanying documentation, and any other applicable requirements. Exceeding the specified ratings (including but not limited to input and output voltage, current, power, and environmental ranges) for EVMs may cause property damage, personal injury or death. If there are questions concerning these ratings, user should contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the applicable EVM user's guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60°C as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using EVMs’ schematics located in the applicable EVM user's guide. When placing measurement probes near EVMs during normal operation, please be aware that EVMs may become very warm. 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U.S. Federal Communications Commission Compliance For EVMs Annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant Caution This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications could void the user's authority to operate the equipment. FCC Interference Statement for Class A EVM devices This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at its own expense. FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Industry Canada Compliance (English) For EVMs Annotated as IC – INDUSTRY CANADA Compliant: This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Concerning EVMs Including Radio Transmitters This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Concerning EVMs Including Detachable Antennas Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Canada Industry Canada Compliance (French) Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement. Concernant les EVMs avec appareils radio Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur. 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