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AMC1203

Texas Instruments
Part Number AMC1203
Manufacturer Texas Instruments
Description Isolated Delta-Sigma Modulator
Published May 10, 2023
Detailed Description AMC1203 www.ti.com SBAS427C – FEBRUARY 2008 – REVISED JUNE 2011 1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulato...
Datasheet PDF File AMC1203 PDF File

AMC1203
AMC1203

Overview
AMC1203 www.
ti.
com SBAS427C – FEBRUARY 2008 – REVISED JUNE 2011 1-Bit, 10MHz, 2nd-Order, Isolated Delta-Sigma Modulator Check for Samples: AMC1203 FEATURES 1 •2 16-Bit Resolution • SNR: 80.
5dB min • THD: –88dB max (AMC1203B) • ±280mV Input Range with +5V Supply • Internal 2.
5V Reference Voltage: 1% Accuracy • Gain Error: ±1% (AMC1203B) • UL1577, IEC60747-5-2 (VDE0884, Rev.
2), and IEC61010-1 Approved – Isolation: 4000VPEAK, Working Voltage: 560V – Transient Immunity: 15kV/μs • Typical 25-Year Life at Rated Working Voltage (see Application Report SLLA197) • Specified Temperature Range: –40°C to +105°C APPLICATIONS • Shunt Based Current Sensing in: – Motor Control – Uninterruptible Power Supplies – Power Inverters – Industrial Process Control DESCRIPTION The AMC1203 is a 1-bit, 10MHz, isolated delta-sigma (ΔΣ) modulator with an output buffer separated from the input interface circuitry by a silicon dioxide (SiO2) isolation barrier.
This barrier provides galvanic isolation of up to 4000VPEAK.
Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.
The AMC1203 modulator operates from a +5V supply with a dynamic range of 95dB.
The differential inputs are ideal for direct connection to shunt resistors or other low-level signal sources.
With the appropriate digital filter and modulator rate, the device can be used to achieve 16-bit analog-to-digital (A/D) conversion with no missing codes.
An effective resolution of 14 bits and an SNR of 85dB (typical) can be maintained with a sinc3 filter with a decimation ratio of 256.
The modulator output is translated to a balanced signal and then transferred by the capacitive isolation barrier.
Across the isolation barrier, a differential comparator receives the logic transition information, and then sets or resets a flip-flop and the output circuit accordingly.
The AMC1203 is available...


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