Texas Instruments AMC3306M25 Bedienungsanleitung
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AMC3306M25 High-Precision, ±250-mV Input,
Reinforced Isolated Delta-Sigma Modulator With Integrated DC/DC Converter
1 Features
•3.3-V or 5-V single supply with integrated DC/DC
converter
•±250-mV input voltage range optimized for current
measurement using shunt resistors
•Low DC errors:
–Offset error: ±50 µV (max)
–Offset drift: ±1 µV/°C (max)
–Gain error: ±0.2% (max)
–Gain drift: ±35 ppm/°C (max)
•High CMTI: 75 kV/µs (min)
•System-level diagnostic features
•Low EMI: Meets CISPR-11 and CISPR-25
standards
•Safety-related certifications:
–6000-V
PEAK
reinforced isolation per DIN VDE V
0884-11
–4250-V
RMS
isolation for 1 minute per UL1577
•Fully specified over the extended industrial
temperature range: –40°C to +125°C
2 Applications
•Compact, isolated shunt-based current sensing in:
–Protection relays
–Motor drives
–Power supplies
–Photovoltaic inverters
3 Description
The AMC3306M25 is a precision, isolated delta-sigma
(ΔΣ) modulator, optimized for shunt-based current
measurements. The fully integrated, isolated DC/DC
converter allows single-supply operation from the
low-side of the device, which makes the device a
unique solution for space-constrained applications.
The reinforced capacitive isolation barrier is certified
according to VDE V 0884-11 and UL1577 and
supports a working voltage of up to 1.2 kV
RMS
.
The isolation barrier separates parts of the system
that operate on different common-mode voltage levels
and protects the low-voltage side from hazardous
voltages and damage.
The input of the AMC3306M25 is optimized for direct
connection to a low-impedance shunt resistor or other,
low-impedance voltage sources with low signal levels.
The excellent DC accuracy and low temperature
drift support accurate current measurements over the
extended industrial temperature range from –40°C to
+125°C.
By using a digital filter (such as a sinc
3
filter) 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.
Device Information
(1)
PART NUMBERPACKAGEBODY SIZE (NOM)
AMC3306M25SOIC (16)10.30 mm × 7.50 mm
(1)For all available packages, see the orderable addendum at
the end of the datasheet.
AMC3306M25
Reinforced Isolation
û-ADCIsolated
Isolated
Power
Isolated
Power
HGND
INP
INN
DCDC_OUT
DCDC_HGND
HLDO_IN
HLDO_OUT
NC
RSHUNT
I
+250 mV
0 V
± 250 mV
DCDC_IN
DCDC_GND
LDO_OUT
VDD
DOUT
CLKIN
GND
DIAG
MCU
Low-side supply
(3.3 V or 5 V)
Typical Application
www.ti.com
AMC3306M25
SBAS996B – MAY 2020 – REVISED APRIL 2021
Copyright ©2021 Texas Instruments Incorporated
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AMC3306M25
SBAS996B – MAY 2020 – REVISED APRIL 2021
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.
Produktspezifikationen
| Marke: | Texas Instruments |
| Kategorie: | Nicht kategorisiert |
| Modell: | AMC3306M25 |
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