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AMC1203DUBR Datasheet(PDF) 1 Page - Texas Instruments

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Part # AMC1203DUBR
Description  1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulator
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AMC1203DUBR Datasheet(HTML) 1 Page - Texas Instruments

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Output
Buffer
V
REF
+
-
+
-
MDAT
MCLK
Output
Buffer
V
REF
+
-
+
-
POR
BIAS
POR
IsolationBarrier
2nd-Order
DS Modulator
20MHz
RC
Oscillator
V
IN+
V
IN-
Buffer
2.5V
V
REF
AMC1203
www.ti.com
SBAS427C
– FEBRUARY 2008 – REVISED JUNE 2011
1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulator
Check for Samples: AMC1203
1
FEATURES
DESCRIPTION
The AMC1203 is a 1-bit, 10MHz, isolated delta-sigma
2
16-Bit Resolution
(
ΔΣ) modulator with an output buffer separated from
SNR: 80.5dB min
the input interface circuitry by a silicon dioxide (SiO2)
THD:
–88dB max (AMC1203B)
isolation
barrier.
This
barrier
provides
galvanic
±280mV Input Range with +5V Supply
isolation of up to 4000VPEAK. Used in conjunction with
isolated power supplies, these devices prevent noise
Internal 2.5V Reference Voltage: 1% Accuracy
currents on a data bus or other circuits from entering
Gain Error:
±1% (AMC1203B)
the local ground and interfering with or damaging
UL1577, IEC60747-5-2 (VDE0884, Rev. 2), and
sensitive circuitry.
IEC61010-1 Approved
The AMC1203 modulator operates from a +5V supply
– Isolation: 4000VPEAK,
with a dynamic range of 95dB. The differential inputs
Working Voltage: 560V
are ideal for direct connection to shunt resistors or
– Transient Immunity: 15kV/μs
other low-level signal sources. With the appropriate
Typical 25-Year Life at Rated Working Voltage
digital filter and modulator rate, the device can be
(see Application Report SLLA197)
used
to
achieve
16-bit
analog-to-digital
(A/D)
Specified Temperature Range:
conversion with no missing codes. An effective
–40°C to +105°C
resolution of 14 bits and an SNR of 85dB (typical)
can be maintained with a sinc3 filter with a decimation
APPLICATIONS
ratio of 256.
Shunt Based Current Sensing in:
The modulator output is translated to a balanced
signal and then transferred by the capacitive isolation
– Motor Control
barrier. Across the isolation barrier, a differential
– Uninterruptible Power Supplies
comparator receives the logic transition information,
– Power Inverters
and then sets or resets a flip-flop and the output
– Industrial Process Control
circuit accordingly.
The AMC1203 is available in SOP-8 gull-wing,
SOP-8, and SOIC-16 packages. The AMC1203 is
characterized
for
operation
over
the
ambient
temperature range of
–40°C to +105°C.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright
© 2008–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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