R2

R1

Phase1

Phase2

or N

R3

DOUT

CLKIN

DVDD

DGND

AGND

AINP

AINN

AVDD

AMC1336

3.0 V, 3.3 V, or 5.0 V

3.3 V or 5.0 V

SD-Cx

SD-Dx

TMS320F28x

PWMx

AVDD

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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. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

AMC1336

SBAS951 – AUGUST 2019

AMC1336 Small, High-Precision, Reinforced Isolated Delta-Sigma Modulator

for Voltage Sensing Applications

1

1 Features

1

•

Input structure optimized for voltage

measurements:

–

Input voltage range: ±1 V

–

Input resistance: 1.6 GΩ (typ)

•

Excellent DC performance:

–

Offset error: ±0.5 mV (max)

–

Offset drift: ±6 µV/°C (max)

–

Gain error: ±0.25% (max)

–

Gain drift: ±45 ppm/°C (max)

•

Transient immunity: 100 kV/µs (typ)

•

Missing high-side supply detection

•

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

2 Applications

•

Isolated AC and DC voltage measurement in:

–

Uninterruptible power supplies

–

Photovoltaic inverters

–

Motor drives

3 Description

The AMC1336 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

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 unique wide, bipolar. ±1-V input voltage range of

the AMC1336 and its high input resistance support

direct connection of the device to resistive dividers in

high-voltage applications. When used with a digital

filter

(for

instance,

as

integrated

in

the

TMS320F28004x, TMS320F2807x or TMS320F2837x

microcontroller

families)

to

decimate

the

output

bitstream, the device can achieve 16 bits of resolution

with a dynamic range of 87 dB at a data rate of 82

kSPS.

On the high-side, the AMC1336 is supplied by a 3.3-

V or 5-V power supply. The isolated digital interface

operates from a 3.0-V, 3.3-V or 5-V power supply.

The AMC1336 performance is specified over the

extended industrial temperature range of –40°C to

+125°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AMC1336

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