DOUT

CLKIN

DVDD

DGND

AGND

AINP

AINN

LDOIN

AMC1304-Q1

HV+

HV-

To Load

Floating

Power Supply

3.3 V or 5.0 V

SD-Cx

SD-Dx

TMS320F2837x

PWMx

Copyright © 2016, Texas Instruments Incorporated

4 V to 18 V

VCAP

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Design

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.

AMC1304L05-Q1, AMC1304L25-Q1, AMC1304M05-Q1, AMC1304M25-Q1

SBAS799 – FEBRUARY 2017

AMC1304x-Q1 High-Precision,

Reinforced Isolated Delta-Sigma Modulators with LDO

1

1 Features

1

•

Qualified for Automotive Applications

•

AEC-Q100 Qualified with the Following Results:

–

Temperature Grade 1: –40°C to +125°C

–

HBM ESD Classification Level 2

–

CDM ESD Classification Level C6

•

Pin-Compatible Family with:

–

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

–

CMOS or LVDS Digital Interface Options

•

Excellent DC Performance:

–

Offset Error: ±50 µV or ±100 µV (max)

–

Offset Drift: 1.3 µV/°C (max)

–

Gain Error: ±0.2% or ±0.3% (max)

–

Gain Drift: ±40 ppm/°C (max)

•

Safety-Related Certifications:

–

V 0884-10 (VDE V 0884-10): 2006-12

–

–

CAN/CSA No. 5A-Component Acceptance

Service Notice

•

Transient Immunity: 15 kV/µs (min)

•

High Electromagnetic Field Immunity

(see Application Note SLLA181A)

•

External 5-MHz to 20-MHz Clock Input

•

On-Chip 18-V LDO Regulator

2 Applications

•

Shunt-Based Current Sensing or Resistor-Divider-

Based Voltage Sensing In:

–

Traction Inverters

–

Onboard Chargers (OBC)

–

DC-DC Converters

–

Battery Management Systems (BMS)

3 Description

The AMC1304-Q1 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

UL1577 and CSA standards. Used in conjunction with

isolated power supplies, the device prevents noise

currents on a high common-mode voltage line from

entering the local system ground and interfering with

or damaging low voltage circuitry.

The input of the AMC1304-Q1 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

while supporting excellent ac and dc performance. By

using an appropriate digital filter (that is, as integrated

on the TMS320F2807x or TMS320F2837x families) to

decimate the bit stream, the device can achieve 16

bits of resolution with a dynamic range of 81 dB (13.2

ENOB) at a data rate of 78 kSPS.

On the high-side, the modulator is supplied by an

integrated low-dropout (LDO) regulator that allows an

unregulated input voltage between 4 V and 18 V

(LDOIN). The isolated digital interface operates from

a 3.3-V or 5-V power supply (DVDD).

The AMC1304-Q1 is available in a wide-body SOIC-

16 (DW) package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

AMC1304x-Q1

SOIC (16)

10.30 mm × 7.50 mm

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

the end of the datasheet.

Simplified Schematic