DOUT

CLKIN

DVDD

DGND

AGND

AINN

AINP

AVDD

AMC1305

HV+

HV-

To Load

Floating

Power Supply

SD-Cx

SD-Dx

TMS320F2837x

3.3 V, or 5.0 V

Gate Driver

Gate Driver

5.0 V

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AMC1305L25, AMC1305M05, AMC1305M25

SBAS654C – JUNE 2014 – REVISED DECEMBER 2014

AMC1305x High-Precision,

Reinforced Isolated Delta-Sigma Modulators

1 Features

3 Description

The AMC1305 is a precision, delta-sigma (

ΔΣ)

1

•

Pin-Compatible Family Optimized for Shunt-

modulator with the output separated from the input

Resistor-Based Current Measurements:

circuitry by a capacitive double isolation barrier that is

–

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

highly resistant to magnetic interference. This barrier

–

CMOS or LVDS Digital Interface Options

is certified to provide reinforced isolation of up to

•

Excellent DC Performance Supporting High-

UL1577, and CSA standards. Used in conjunction

Precision Sensing on System Level:

with isolated power supplies, the device prevents

–

Offset Error: ±50 µV or ±150 µV (max)

noise currents on a high common-mode voltage line

–

Offset Drift: 1.3 µV/°C (max)

from entering the local system ground and interfering

with or damaging low voltage circuitry.

–

Gain Error: ±0.3% (max)

The AMC1305 is optimized for direct connection to

–

Gain Drift: ±40 ppm/°C (max)

shunt resistors or other low voltage level signal

•

Certified Isolation Barrier:

sources

while

supporting

excellent

dc

and

ac

–

Reinforced Isolation Rating

performance. Shunt resistors are typically used to

–

VDE V 0884-10, UL1577, and CSA Approved

sense

currents

in

motor

drives,

green

energy

generation systems, or other industrial applications.

–

By using an appropriate digital filter (that is, as

–

integrated on the TMS320F2837x) to decimate the bit

–

Transient Immunity: 15 kV/µs (min)

stream, the device can achieve 16 bits of resolution

with a dynamic range of 85 dB (13.8 ENOB) at a data

•

High Electromagnetic Field Immunity

rate of 78 kSPS.

(see Application Note SLLA181A)

On the high-side, the modulator is supplied with a

•

External 5-MHz to 20-MHz Clock Input for

nominal voltage of 5 V (AVDD), whereas the isolated

Easier System-Level Synchronization

digital interface operates from a 3.3-V or 5-V power

•

Fully Specified Over the Extended Industrial

supply (DVDD).

Temperature Range

The AMC1305 is available in a wide-body SOIC-16

(DW) package and is specified from –40°C to 125°C.

2 Applications

•

Shunt Resistor Based Current Sensing in:

Device Information(1)

–

Industrial Motor Drives

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

Photovoltaic Inverters

AMC1305x

SOIC (16)

10.30 mm × 7.50 mm

–

Uninterruptible Power Supplies

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

the end of the datasheet.

•

Isolated Voltage Sensing

4 Simplified Schematic

1

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.