Texas Instruments AMC1311EVM User manual

SLAU745–November 2017

AMC1311EVM Users Guide

User's Guide

SLAU745–November 2017

AMC1311EVM Users Guide

The AMC1311 is a precision isolation amplifier with an output separated from the input circuitry by a

silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. This barrier has been

certified to provide reinforced galvanic isolation of up to 7000 VPEAK per DIN V VDE V 0884-11 (VDE V

0884-11): 2017-01.

Contents

1 Introduction ................................................................................................................... 2

1.1 Features.............................................................................................................. 2

2 Analog Interface.............................................................................................................. 2

2.1 Analog Input......................................................................................................... 2

2.2 Shutdown ............................................................................................................ 3

2.3 Analog Output....................................................................................................... 3

3 Power Supplies .............................................................................................................. 4

3.1 VDD1 Input .......................................................................................................... 4

3.2 VDD2 Input .......................................................................................................... 4

4 EVM Operation............................................................................................................... 5

4.1 Isolated Power and Analog Inputs: J1 and J4 .................................................................. 5

4.2 User Power and Analog Outputs: J2, J3 and J6................................................................ 5

4.3 Device Operation ................................................................................................... 6

5 Board Layout ................................................................................................................. 6

6 Schematic and Bill of Materials ............................................................................................ 7

6.1 Bill of Materials...................................................................................................... 7

6.2 Schematic............................................................................................................ 8

7 Related Documentation..................................................................................................... 9

List of Figures

1 AMC1311EVM Schematic – Analog Input Section...................................................................... 2

2 AMC1311EVM Schematic – Analog Output Section ................................................................... 3

3 VDD1 Input ................................................................................................................... 4

4 VDD2 Input Connector...................................................................................................... 4

5 AMC1311 Silk Screen Drawing............................................................................................ 6

6 AMC1311EVM Schematic.................................................................................................. 8

List of Tables

1 J1 – Analog Input............................................................................................................ 5

2 J4 - VDD1 Power ............................................................................................................ 5

3 J2 – Differential Analog Output ............................................................................................ 5

4 J3 – VDD2 Power............................................................................................................ 5

5 J6 – Single-Ended Analog Output......................................................................................... 6

6 Bill of Materials............................................................................................................... 7

Introduction

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Trademarks

All trademarks are the property of their respective owners.

1 Introduction

For use in high-resolution voltage measurement applications, the high-impedance input of the AMC1311 is

optimized for connection to high-voltage resistive dividers or other voltage signal sources with high output

resistance.

Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with

the AMC1311EVM.

1.1 Features

• Full-featured Evaluation Module for the AMC1311 single-channel precision isolation amplifier.

• Screw terminals for easy access to analog inputs and outputs.

• Transformer and rectifiers to provide an isolated 5-V source to VDD1.

• Differential to Single-ended output option.

2 Analog Interface

The analog input to the AMC1311 is routed from a three-wire screw terminal screw at J1.1 which provides

access to the VINP terminal. A test point, TP1 is also provided along with pads for 1206 size user installed

series resistors R1, R2 and R3 to create a voltage divider circuit for the input to the AMC1311. The analog

input is referenced to J1.2 or TP2.

2.1 Analog Input

The default analog input to the AMC1311EVM board is comprised of R4 and C3 which form a simple anti-

aliasing filter with a corner frequency of 723 Hz. The input circuit for the AMC1311 is shown in Figure 1.

Using a signal generator or other voltage source, the user can apply an input signal directly to J1 pin 1.

The maximum voltage input to the AMC1311 via J1.1 is 2 V referenced to J1.2 or TP2.

Figure 1. AMC1311EVM Schematic – Analog Input Section

41 + 42 + 43 =

621F8

+02

T44

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Analog Interface

SLAU745–November 2017

AMC1311EVM Users Guide

With user installed resistor options R1 through R3, an external voltage source can be applied between

TP1 and GND1 via J1.2 or TP2. As depicted in Figure 1, with R4 installed as 10 kΩ, resistors R1 through

R3 can be chosen according to Equation 1:

(1)

2.2 Shutdown

The AMC1311 features a shutdown option which is an active high input. Shunt jumper SH-J7 is installed

by default and allows for normal operation of the AMC1311 device. When the shunt jumper is removed,

the AMC1311 enters into a low power mode by means of an internal pullup resistor for battery or other

power sensitive applications. For external shutdown operation, J1.3 provides access to the SHTDN pin

when shunt SH-J7 is removed.

2.3 Analog Output

The analog output from the AMC1311EVM board is a fully differential signal centered at 1.44 V. The

differential output of U1 is available on the two screw terminals of J2 as shown below in Figure 2. U4 and

U5 provide the user with a single-ended version of the analog output on J6 pin 1. U5 is designed to

provide bias voltage to the difference amplifier configuration of U4. The single ended output provides unity

gain with an output voltage swing from 0.5 V to 2.5 V. If a different bias voltage is desired, the shunt on J8

can be moved to cover pins 2-3 and an external voltage source may be applied to TP4 referenced to

GND2 via TP3.

Figure 2. AMC1311EVM Schematic – Analog Output Section

Power Supplies

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3 Power Supplies

The AMC1311EVM requires two separate power rails, VDD1 and VDD2. VDD1 is on the high voltage side

of the amplifier. VDD2 is on the user side of the amplifier.

3.1 VDD1 Input

The default configuration of the EVM provides 5V to VDD1 through transformer T1 via U3, an SN6501

push-pull driver. A shunt on jumper J5 is shorting pins 1-2 which routes the regulated 5V from U2, a

TPS76350, to pin 1 of U1. The screw terminal at J4 allows the user to provide their own VDD1 source

when the shunt on J5 is covering pins 2-3. The VDD1 supply should be between 3 and 5.5 VDC when

using an external voltage source. The input power scheme is shown in Figure 3.

Figure 3. VDD1 Input

3.2 VDD2 Input

The user side of the AMC1311 isolation amplifier is rated for 3.0 to 5.5 VDC and is applied to the amplifier

using J3 pin 1. When using the on-board transformer for VDD1, a minimum of 3.6 V is needed at J3.

Figure 4 depicts the power input for VDD2.

Figure 4. VDD2 Input Connector

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EVM Operation

SLAU745–November 2017

AMC1311EVM Users Guide

4 EVM Operation

The following section describes the general operation of the AMC1311EVM.

4.1 Isolated Power and Analog Inputs: J1 and J4

The analog input voltage to the AMC1311EVM can be applied directly to J1 pins 1 and 2.

Table 1 lists the details of J1.

Table 1. J1 – Analog Input

Pin Number Signal Description

J1.1 VINP Analog input to the AMC1311.

J1.2 GND1 Ground connection.

J1.3 ShutDown Optional input to drive the shutdown pin from an external source.

The isolated power input to the AMC1311EVM printed circuit board (PCB) can be applied directly to J4

pins 1 and 2. Table 2 lists the details of J4.

Table 2. J4 - VDD1 Power

Pin Number Signal Description

J4.1 VDD1 Connection to the AMC1311 VDD1 terminal (pin 1) with SH-J5 shorting pins 2-3 on J5.

J4.2 GND1 Connection to the AMC1311 GND1 terminal (pin 4).

CAUTION

Carefully review the AMC1311 product data sheet for the limitations of the

analog input range, and ensure that the appropriate analog/digital voltages are

applied prior to connecting any analog input to the EVM. The transformer on

the evaluation module is rated to 2500 Vrms, but the board is not certified for

high voltage operation.

4.2 User Power and Analog Outputs: J2, J3 and J6

The differential analog output voltage from the AMC1311EVM printed circuit board is applied directly to J2

pins 1 and 2. Table 3 lists the details of J2.

Table 3. J2 – Differential Analog Output

Pin Number Signal Description

J2.1 VOUTN Non-inverting analog output from the AMC1311 (pin 6).

J2.2 VOUTP Inverting output from the AMC1311 (pin 7).

The VDD2 power input to the AMC1311EVM printed circuit board can be applied directly to J3 pins 1 and

2. Table 4 lists the details of J3.

Table 4. J3 – VDD2 Power

Pin Number Signal Description

J3.1 VDD2 Connection to the AMC1311 VDD2 terminal (pin 8).

J3.2 GND2 Connection to the AMC1311 GND2 terminal (pin 5).

The single-ended analog output voltage from the AMC1311EVM printed circuit board is applied directly to

J6 pin 1 referenced to pin 2. Table 5 lists the details of J6.

EVM Operation

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Table 5. J6 – Single-Ended Analog Output

Pin Number Signal Description

J6.1 VOUT Single-ended analog output from the AMC1311 through U4.

J6.2 GND2 Ground reference.

4.3 Device Operation

Once the VDD1 and VDD2 power is applied to the AMC1311EVM, the analog output will be available with

a fixed gain of one and a DC offset equal to 1.44 V (typical).

An analog input signal may be applied directly at screw terminal J2. Refer to Figure 1 and Table 2 for

details. The analog input range is specified at 0 to 2 V.

The analog output has a nominal gain of 1 through the AMC1311 isolation amplifier. With an input voltage

of 0 – 2 V, the nominal output is ±1 V differential. The output voltage is centered on 1.44 V providing a

convenient analog input range to the embedded ADCs of the MSP430 and TMS320C2000 series of digital

processors.

5 Board Layout

This section contains the and printed circuit board (PCB) layout of the AMC1311EVM.

NOTE: Board layouts are not to scale. These are intended to show how the board is laid out, and

are not intended to be used for manufacturing AMC1311EVM PCBs.

Figure 5. AMC1311 Silk Screen Drawing

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Schematic and Bill of Materials

SLAU745–November 2017

AMC1311EVM Users Guide

6 Schematic and Bill of Materials

This section contains the complete bill of materials, and schematic diagram of the AMC1311EVM.

6.1 Bill of Materials

Table 6. Bill of Materials

Designator Description Manufacturer Mfg. Part Number

C1, C6 CAP, CERM, 0.1 µF, 50 V,+/- 10%, X7R, 1206 AVX 12065C104KAT2A

C2, C5 CAP, CERM, 4.7 µF, 25 V,+/- 20%, X5R, 1206 AVX 12063D475MAT2A

C3 CAP, CERM, 0.022 µF, 50 V, +/- 1%, C0G/NP0, 0805 Kemet C0805C223F5GACTU

C4, C8, C9, C10 CAP, CERM, 10 µF, 16 V, +/- 10%, X5R, 0805 Taiyo Yuden EMK212BJ106KG-T

C7, C15, C16 CAP, CERM, 0.1 µF, 50 V, +/- 10%, X7R, 0603 AVX 06035C104KAT2A

C11 CAP, CERM, 0.1 µF, 25 V, +/- 10%, X7R, 0805 Kemet C0805C104K3RACTU

C12 CAP, CERM, 100 pF, 10 V, +/- 10%, X7R, 0603 AVX 0603ZC101KAT2A

C13, C14 CAP, CERM, 1000 pF, 10 V, +/- 10%, X7R, 0603 AVX 0603ZC102KAT2A

D1, D2 Diode, Schottky, 20V, 0.5A, SOD-123 ON Semiconductor MBR0520LT1G

J1 Terminal Block, 3.5mm Pitch, 3x1, TH On-Shore Technology ED555/3DS

J2, J3, J4, J6 Terminal Block, 3.5mm Pitch, 2x1, TH On-Shore Technology ED555/2DS

J5, J8 Header, 2mm, 3x1, Tin, TH Samtec TMM-103-01-T-S

J7 Header, 50mil, 2x1, Gold, TH Sullins Connector

Solutions GRPB021VWVN-RC

R4 RES, 10.0 k, 1%, 0.25 W, 1206 Vishay-Dale CRCW120610K0FKEA

R5, R6, R7, R9, R10,

R11 RES, 10.0 k, 1%, 0.1 W, 0603 Vishay-Dale CRCW060310K0FKEA

R8 RES, 1.10 k, 1%, 0.1 W, 0603 Vishay-Dale CRCW06031K10FKEA

T1 Transformer, 340uH, SMT Wurth Elektronik 750313769

TP1, TP2, TP3, TP4 Terminal, Turret, TH, Double Keystone 1502-2

U1 Precision, 2-V Input, Reinforced Isolated Amplifier, DWV0008A

(SOIC-8) Texas Instruments AMC1311DWVR

U2 Single Output LDO, 150 mA, Fixed 5 V Output, 2.5 to 24 V

Input, with Ultra-Low IQ, 5-pin SOT-23 (DBV), -40 to 125 degC,

Green (RoHS & no Sb/Br)

Texas Instruments TLV70450DBVT

U3 Transformer Driver for Isolated Power Supplies, DBV0005A Texas Instruments SN6501DBVR

U4, U5 Low-Power, Rail-to-Rail In/Out, 1-MHz Operational Amplifier for

Cost-Sensitive Systems, DCK0005A (SOT-5) Texas Instruments TLV6001IDCKR

R1, R2, R3 Not Installed

GND1

GND2

20V

VDD2

GND2

VDD2

10µF

GND2

10µF

C10

GND1

10µF

VDD2

GND1

VDD1

GND1

GND

OUT

3IN 2

NC 4

U2 TLV70450DBVT

GND1

0.1µF

4.7µF

0.1µF

C11

GND1

10µF

0.022µF

VCC

3GND 4

GND 5

SN6501DBVR

GND1

10.0k

R10

10.0k

VDD2

GND2

VDD2

GND2

10.0k

1.10k

VDD2

GND2

V+

V-

TLV6001IDCKR

V+

V-

TLV6001IDCKR

R1 R2

TP1

10.0k

R11

100pF

C12

1000pF

C13

1000pF

C14

0.1µF

C15

VDD2

GND2

0.1µF

C16

0.1µF

SH-J5

SH-J7

TP2

TP3

User Installed Options

VINP

GND1

Shut Down

VOUTP

3.0 V to 5.5 V

VOUTN

VOUT

GND2

VDD1

GND1

VDD2

3.0 V to 5.5 V

SH-J8

TP4

0.1µF

4.7µF

VDD1

VINP

SHTDN

GND1

4GND2 5

VOUTN 6

VOUTP 7

VDD2 8

AMC1311BDWVR

Schematic and Bill of Materials

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6.2 Schematic

Figure 6. AMC1311EVM Schematic

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Related Documentation

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AMC1311EVM Users Guide

7 Related Documentation

To obtain a copy of any of the following TI documents, call the Texas Instruments Literature Response

Center at (800) 477-8924 or the Product Information Center (PIC) at (972) 644-5580. When ordering,

please identify this booklet by its title and literature number. Updated documents can also be obtained

through our website at www.ti.com/.

•AMC1311 Precision, 2-V Input, Reinforced Isolated Amplifier, SBAS786

•SN6501 Transformer Driver for Isolated Power Supplies, SLLSEA0

•TLV600x Low-Power, Rail-to-Rail In/Out, 1-MHz Op Amp for Cost-Sen, SBOS779

STANDARD TERMS FOR EVALUATION MODULES

1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or

documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance

with the terms set forth herein. User's acceptance of the EVM is expressly subject to the following terms.

1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility

evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not

finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For

clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions

set forth herein but rather shall be subject to the applicable terms that accompany such Software

1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,

or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production

system.

2Limited Warranty and Related Remedies/Disclaimers:

2.1 These terms do not apply to Software. The warranty, if any, for Software is covered in the applicable Software License

Agreement.

2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM

to User. Notwithstanding the foregoing, TI shall not be liable for a nonconforming EVM if (a) the nonconformity was caused by

neglect, misuse or mistreatment by an entity other than TI, including improper installation or testing, or for any EVMs that have

been altered or modified in any way by an entity other than TI, (b) the nonconformity resulted from User's design, specifications

or instructions for such EVMs or improper system design, or (c) User has not paid on time. Testing and other quality control

techniques are used to the extent TI deems necessary. TI does not test all parameters of each EVM.

User's claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects in the EVMs within ten (10)

business days after delivery, or of any hidden defects with ten (10) business days after the defect has been detected.

2.3 TI's sole liability shall be at its option to repair or replace EVMs that fail to conform to the warranty set forth above, or credit

User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the warranty

period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to repair or

replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall be

warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day

warranty period.

3Regulatory Notices:

3.1 United States

3.1.1 Notice applicable to EVMs not FCC-Approved:

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. 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 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 not expressly approved by the party responsible for compliance could void the user's authority to

operate the equipment.

FCC Interference Statement for Class A EVM devices

NOTE: 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 his own expense.

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