DOUT

CLKIN

DVDD

DGND

AGND

AINP

AINN

AVDD

AMC1306Mx

HV+

HV-

To Load

Floating

Power Supply

3.0 V, 3.3 V, or 5.0 V

RSHUNT

3.3 V or 5.0 V

SD-Cx

SD-Dx

TMS320F28x7x

PWMx

Optional

Optional

Optional

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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. PRODUCTION DATA.

AMC1306E05, AMC1306E25, AMC1306M05, AMC1306M25

SBAS734C – MARCH 2017 – REVISED JANAURY 2020

AMC1306x Small, High-Precision,

Reinforced Isolated Delta-Sigma Modulators With High CMTI

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 bitstream

options

•

Excellent DC performance:

–

Offset error: ±50 µV or ±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:

–

7000-VPEAK reinforced isolation per DIN VDE V

0884-11: 2017-01

–

5000-VRMS isolation for 1 minute per UL1577

–

CAN/CSA no. 5A-component acceptance

service notice and IEC 62368-1 end equipment

standard

•

Fully specified over the extended industrial

temperature range: –40°C to +125°C

2 Applications

•

Shunt-resistor-based current sensing and isolated

voltage measurements in:

–

Industrial motor drives

–

Photovoltaic inverters

–

Uninterruptible power supplies

3 Description

The AMC1306 is a precision, delta-sigma (ΔΣ)

modulator 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 VPEAK according to the DIN VDE V 0884-11 and

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 AMC1306 is optimized for direct

connection to shunt resistors or other low voltage-

level signal sources. The unique low input voltage

range

of

the

±50-mV

device

allows

significant

reduction of the power dissipation through the shunt

and supports excellent ac and dc performance. The

output bitstream of the AMC1306 is Manchester

coded (AMC1306Ex) or uncoded (AMC1306Mx),

depending on the derivate. 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 a data

rate of 78 kSPS.

The bitstream output of the Manchester coded

AMC1306Ex versions support 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)

AMC1306x

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