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 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.
● 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
●All other trademarks are the property of their respective owners
