Copyright © 2017, Texas Instruments Incorporated

Note: no CLKOUT connection using AMC1303Ex,

pin 7 to be connected to DGND in this case

DOUT

CLKOUT

DVDD

DGND

AGND

AINP

AINN

AVDD

AMC1303Mx

HV+

HV-

Floating

Power Supply

3.0 V, 3.3 V, or 5.0 V

3.3 V or 5.0 V

SD-Cx

SD-Dx

TMS320F28x7x

Product

Folder

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.

AMC1303E0510, AMC1303M0510, AMC1303E0520, AMC1303M0520

AMC1303E2510, AMC1303M2510, AMC1303E2520, AMC1303M2520

SBAS771 – JUNE 2017

AMC1303x Small, High-Precision,

Reinforced Isolated Delta-Sigma Modulators with Internal Clock

1

1 Features

1

•

Pin-Compatible Family Optimized for Shunt-

Resistor-Based Current Measurements:

–

±50-mV or ±250-mV Input Voltage Ranges

–

Manchester Coded or Uncoded Bistream

Options

–

10-MHz and 20-MHz Clock Options

•

Excellent DC Performance:

–

Offset Error: ±100 µV (max)

–

Offset Drift: ±1 µV/°C (max)

–

Gain Error: ±0.2% (max)

–

Gain Drift: ±40 ppm/°C (max)

•

Transient Immunity: 100 kV/µs (typ)

•

System-Level Diagnostic Features

•

Safety-Related Certifications:

–

V 0884-11 (VDE V 0884-11): 2017-01

–

–

CAN/CSA No. 5A-Component Acceptance

Service Notice, IEC 60950-1, and IEC 60065

End Equipment Standards

•

Fully Specified Over the Extended Industrial

Temperature Range: –40°C to +125°C

2 Applications

•

Shunt-Resistor-Based Current Sensing and

Isolated Voltage Measurement in:

–

Industrial Motor Drives

–

Photovoltaic Inverters

–

Uninterruptible and Isolated Power Supplies

–

Power Factor Correction Circuits

3 Description

The AMC1303 (AMC1303x0510, AMC1303x0520,

AMC1303x2510, and AMC1303x2520) is a family of

precision, delta-sigma (ΔΣ) modulators with the

output separated from the input circuitry by a

capacitive double isolation barrier that is highly

resistant to magnetic interference. This barrier is

certified to provide reinforced isolation of up to 7000

UL1577 standards. Used in conjunction with isolated

power supplies, this isolated modulator separates

parts of the system that operate on different common-

mode voltage levels and protects lower-voltage parts

from damage.

The input of the AMC1303 is optimized for direct

connection to shunt resistors or other low voltage-

level signal sources. The ±50-mV input voltage range

option allows significant reduction of the power

dissipation through the shunt. The output bit-stream

of the AMC1303 is synchronized to the internally

generated

clock

and

is

Manchester

coded

(AMC1303Ex) or uncoded (AMC1303Mx). By using

an integrated digital filter (such as those in the

TMS320F2807x or TMS320F2837x microcontroller

families) to decimate the bitstream, the device can

achieve 16 bits of resolution with a dynamic range of

85 dB at an effective output data rate of 78 kSPS.

The bitstream output of the Manchester coded

AMC1303Ex versions supports single-wire data and

clock transfer without having to consider the setup

and hold time requirements of the receiving device.

Device Information (1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AMC1303x

SOIC (8)

5.85 mm × 7.50 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Schematic