Texas Instruments AMC1303 User manual

SBAU271B–January 2017–Revised December 2019

AMC1303, AMC1306, and AMC1336 Evaluation Module

User's Guide

SBAU271B–January 2017–Revised December 2019

AMC1303, AMC1306, and AMC1336 Evaluation Module

This user’s guide describes the characteristics, operation, and use of the AMC13xxEVM (AMC1303EVM,

AMC1306EVM, and AMC1336EVM). A complete circuit description as well as 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

Device Description

AMC1303 Small, High-Precision, Reinforced Isolated Modulator with Internal Clock

AMC1306 AMC1306x Small-Size, Reinforced Isolated Delta-Sigma Modulators

AMC1336 AMC1336 Small, High-Precision, Reinforced Isolated Delta-Sigma Modulator for Voltage Sensing

Applications

Contents

1 EVM Overview ............................................................................................................... 2

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

3 Digital Interface .............................................................................................................. 3

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

5 Layout, BOM, and Schematic.............................................................................................. 7

List of Figures

1 AMC13xxEVM Schematic: Analog Input Section........................................................................ 3

2 Digital I/O ..................................................................................................................... 3

3 AVDD Input................................................................................................................... 4

4 DVDD Input................................................................................................................... 5

5 AMC13xxEVM Silkscreen .................................................................................................. 7

6 AMC1306EVM Schematic.................................................................................................. 9

List of Tables

1 Related Documentation..................................................................................................... 1

2 J2: Analog Inputs ............................................................................................................ 5

3 J1: Analog Inputs ............................................................................................................ 5

4 J4: AMC1303EVM Digital Output.......................................................................................... 6

5 J4: AMC1306EVM, AMC1336EVM Digital Output ...................................................................... 6

6 AMC13xxEVM Bill of Materials............................................................................................. 8

EVM Overview

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1 EVM Overview

1.1 Features

This EVM supports the following features:

• Full-featured evaluation board for the AMC1303, AMC1306, or AMC1336 single-channel delta-sigma

modulator

• Configurable AVDD and DVDD power supplies

• Screw terminals for easy access to analog inputs and outputs

1.2 Introduction

The AMC1303, AMC1306, and AMC1336 devices are 1-bit modulators 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 8000 VPEAK. When used in combination with the AMC1210 or other digital filter,

the AMC1303, AMC1306, and AMC1336 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 AMC1303EVM, AMC1306EVM, or the AMC1336EVM.

2 Analog Interface

The analog input to the AMC13xxEVM is routed from a two-wire screw terminal screw at J1. This screw

terminal gives the user access to the inverting and non-inverting inputs of the AMC1303, AMC1306, or

AMC1336 depending on which device is installed on the board.

2.1 Analog Inputs

The analog input to the AMC13xxEVM board is comprised of direct connection to AINP and AINN through

0-Ωresistors R1 and R2. If filtering is required, R/C filter circuit options are possible using the footprints for

C4, C5 and C8. The input circuit for the AMC13xxEVM is illustrated in Figure 1.

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Digital Interface

SBAU271B–January 2017–Revised December 2019

AMC1303, AMC1306, and AMC1336 Evaluation Module

Figure 1. AMC13xxEVM Schematic: Analog Input Section

3 Digital Interface

The AMC13xxEVM digital input/output is a simple three terminal screw connector located at J4. J4 pin 1 is

the output data from the modulator installed in location U2. For the AMC1306 and AMC1336, pin 7 is the

modulator clock input as shown below. A 5 MHz to 20 MHz modulator clock can be applied to J4.2

referenced to J4.3. For the AMC1303, pin 7 is the modulator clock output which can be monitored at J4.2

relative to J4.3.

Figure 2. Digital I/O

Power Supplies

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4 Power Supplies

The AMC13xxEVM requires two separate power rails, 5 VISO and DVDD. 5 VISO is on the high voltage side

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

4.1 AVDD Input

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

push-pull driver. A shunt on jumper JP1 is shorting pins 2-3, which routes the regulated 5 V from U1, a

TPS76350, to pin 1 of U2. The screw terminal at J2 allows the user to provide their own AVDD source

when the shunt on JP1 is covering pins 1-2. The AVDD supply should be between 3 and 5.5 VDC. The

input power scheme is shown in Figure 3.

Figure 3. AVDD Input

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Power Supplies

SBAU271B–January 2017–Revised December 2019

AMC1303, AMC1306, and AMC1336 Evaluation Module

The screw terminal at J3 allows the user to provide the DVDD source. The DVDD supply should be

between 3 and 5.5 VDC.

Figure 4. DVDD Input

4.2 Isolated Power and Analog Inputs: J1 and J2

The isolated power input to the AMC13xxEVM printed circuit board (PCB) can be applied directly to J2

pins 1 and 2.

Table 2 lists the details of J2.

Table 2. J2: Analog Inputs

Pin Number Signal Description

J2.1 AGND Connection to the AMC1303, AMC1306, or AMC1336 AGND terminal (pin 4)

J2.2 AVDD Connection to the AMC1303, AMC1306, or AMC1336 AVDD terminal (pin 1)

The analog input to the AMC13xxEVM printed circuit board (PCB) can be applied directly to J1 pins 1

and 2.

CAUTION

Carefully review the AMC1303, AMC1306, and AMC1336 product data sheets

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 EVM uses the ±250 mV versions of the devices for the AMC1303

and AMC1306. The EVM uses ±1 V for the AMC1336.

Table 3 lists the details of J1.

Table 3. J1: Analog Inputs

Pin Number Signal Description

J1.1 AINP Noninverting analog input to the AMC1303, AMC1306, or

AMC1336

J1.2 AINN Inverting input to the AMC1303, AMC1306, or AMC1336

Power Supplies

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4.3 Device Operation

Once the analog and isolated power is applied to the AMC13xxEVM, the digital outputs become active. If

the AMC1303 is installed at location U2, the device uses its own internal modulator clock. Screw terminal

J4 has the connections as shown in Table 4.

Table 4. J4: AMC1303EVM Digital Output

Pin Number Signal Description

J4.1 DOUT AMC1303 bit stream data output

J4.2 CLOCK AMC1303 modulator clock output

J4.3 DGND Digital ground reference

If the AMC1306 is installed at location U2, the device requires an external modulator clock between 5 and

20 MHz. Screw terminal J4 has the connections as shown in Table 5.

Table 5. J4: AMC1306EVM, AMC1336EVM Digital Output

Pin Number Signal Description

J4.1 DOUT AMC1306, AMC1336 bit stream data output

J4.2 CLOCK AMC1306, AMC1336 modulator clock input

J4.3 DGND Digital ground reference

An analog input signal may be applied directly at screw terminal J1. Refer to Figure 1 and Table 3 for

details. The linear analog input range, (VIN+) – (VIN–), is ±250 mV for the AMC1303 and AMC1306. The

linear analog input range, (VIN+) – (VIN–), is ±1 V for the AMC1336.

For the AMC1303 and AMC1306, as the input voltage approaches the maximum input level of +250 mV,

the 1s density of the modulator output will approach 92%. Likewise, when the input voltage approaches

the lower limit of -250 mV the 1s density will be approximately 8%.

For the AMC1336, as the input voltage approaches the maximum input level of +1 V, the 1s density of the

modulator output approaches 92%. Likewise, when the input voltage approaches the lower limit of –1 V

the 1s density is approximately 8%.

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Layout, BOM, and Schematic

SBAU271B–January 2017–Revised December 2019

AMC1303, AMC1306, and AMC1336 Evaluation Module

5 Layout, BOM, and Schematic

This section contains the complete bill of materials, schematic diagram and printed circuit board (PCB)

layout of the AMC1303/06EVM.

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 AMC13xxEVM PCBs.

5.1 Printed Circuit Board Layout

Figure 5. AMC13xxEVM Silkscreen

Layout, BOM, and Schematic

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5.2 Bill of Material

Table 6. AMC13xxEVM Bill of Materials

Designators Description Manufacturer Mfg. Part Number

C1, C6, C11 CAP, CERM, 10 uF, 10 V, +/- 10%, X5R, 0805 Kemet C0805C106K8PACTU

C3, C9 CAP, CERM, 0.1 uF, 25 V, +/- 10%, X7R, 0603 AVX 06033C104KAT2A

C7 CAP, CERM, 0.1 uF, 50 V, +/- 10%, X7R, 1206 Yageo America CC1206KRX7R9BB104

C10 CAP, CERM, 1 uF, 10 V, +/- 10%, X5R, 0603 Kemet C0603C105K8PACTU

C12, C13 CAP, CERM, 33 pF, 50 V, +/- 5%, C0G/NP0, AEC-

Q200 Grade 0, 0603 TDK CGA3E2NP01H330J080AA

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

J1, J2, J3 Terminal Block, 3.5mm Pitch, 2x1, TH On-Shore Technology ED555/2DS

J4 Terminal Block, 3.5mm Pitch, 3x1, TH On-Shore Technology ED555/3DS

JP1 Header, 2mm, 3x1, Tin, TH Samtec TMM-103-01-T-S

JP2 Header, 2mm, 2x1, Tin, TH Samtec TMM-102-01-T-S

LBL1 Thermal Transfer Printable Labels, 0.650" W x

0.200" H - 10,000 per roll Brady THT-14-423-10

R1, R2, R3 RES, 0, 5%, 0.1 W, AEC-Q200 Grade 0, 0603 Panasonic ERJ-3GEY0R00V

R7, R8 RES, 100, 5%, 0.1 W, AEC-Q200 Grade 0, 0603 Vishay-Dale CRCW0603100RJNEA

SH-J1, SH-J2 Shunt, 2mm, Gold plated, Black Samtec 2SN-BK-G

T1 Transformer, 45.6 uH SMT Coilcraft DA2303-ALB

TP2, TP3 Terminal, Turret, TH, Double Keystone 1573-2

U1 Single Output LDO, 150 mA, Fixed 5 V Output, 2.7

to 10 V Input, with Low IQ, 5-pin SOT-23 (DBV), -40

to 125 degC, Green (RoHS & no Sb/Br) Texas Instruments TPS76350DBVR

U2 Small Reinforced Isolated Modulator With +/-250mV

Input and CMOS Interface, DWV0008A (SOIC-8) Texas Instruments AMC1306M25DWVR or

AMC1303M2510DWVR

AMC1336MDWVR

U3 Low-Noise 350 mA, 410 kHz Transformer Driver,

DBV0005A (SOT-23-5) Texas Instruments SN6501DBVR

TP1 Terminal, Turret, TH, Double Not Installed

R4, R5, R6 RES, 10.2 k, 1%, 0.25 W, 1206 Not Installed

C4, C5, C8 CAP, CERM, 10 pF, 50 V, +/- 5%, C0G/NP0, 0603 Not Installed

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Layout, BOM, and Schematic

SBAU271B–January 2017–Revised December 2019

AMC1303, AMC1306, and AMC1336 Evaluation Module

5.3 Schematic

Figure 6 illustrates the AMC1306EVM schematic.

Figure 6. AMC1306EVM Schematic

5.4 Trademarks

All trademarks are the property of their respective owners.

Revision History

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Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from A Revision (July 2019) to B Revision ..................................................................................................... Page

• Changed AMC1336 description in Related Documentation table................................................................... 1

• Changed AMC13xxEVM Silkscreen figure............................................................................................. 7

Changes from Original (January 2017) to A Revision .................................................................................................... Page

• Added AMC1336EVM to document..................................................................................................... 1

• Changed VDD1 to AVDD and VDD2 to DVDD in Power Supplies section........................................................ 4

• Changed Signal column in J2: Analog Inputs table................................................................................... 5

• Changed clock output to clock input in CLOCK row of J4: AMC1306EVM, AMC1336EVM Digital Output table ............ 6

• Changed AMC13xxEVM Bill of Materials table........................................................................................ 8

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