Texas Instruments AMC1303 User manual

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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

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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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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

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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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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

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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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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

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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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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.

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Revision History
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