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AMC1203 Datasheet(PDF) 1 Page - Texas Instruments |
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AMC1203 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 30 page AVDD DGND AGND DVDD DS Modulator DATA VINP VINN 2.5V Ref CLKIN AMC1204 www.ti.com SBAS512B – APRIL 2011 – REVISED AUGUST 2011 20MHz, Second-Order, Isolated Delta-Sigma Modulator for Current-Shunt Measurement Check for Samples: AMC1204 1 FEATURES DESCRIPTION The AMC1204 is a 1-bit digital output, isolated 2 • ±250mV Input Voltage Range Optimized for delta-sigma ( ΔΣ) modulator that can be clocked at up Shunt Resistors to 20MHz. The digital isolation of the modulator • Certified Digital Isolation: output is provided by a silicon dioxide (SiO2) barrier – CSA, IEC60747-5-2, and UL1577 Approved that is highly resistant to magnetic interference. This barrier has been certified to provide basic galvanic – Isolation Voltage: 4000VPEAK isolation of up to 4000VPEAK according to UL1577, – Working Voltage: 1200VPEAK IEC60747-5-2, and CSA standards or specifications. – Transient Immunity: 15kV/µs The AMC1204 provides a single-chip solution for • Long Isolation Barrier Lifetime (see measuring the small signal of a shunt resistor across Application Report SLLA197) an isolated barrier. These types of resistors are typically used to sense currents in motor control • High Electromagnetic Field Immunity inverters, green energy generation systems, and (see Application Note SLLA181A) other industrial applications. The AMC1204 • Outstanding AC Performance: differential inputs easily connect to the shunt resistor – SNR: 84dB (min) or other low-level signal sources. An internal reference eliminates the need for external – THD: –80dB (max) components. When used with an appropriate external • Excellent DC Precision: digital filter, an effective number of bits (ENOB) of 14 – INL: ±8LSB (max) is achieved at a data rate of 78kSPS. – Gain Error: ±2% (max) A 5V analog supply (AVDD) is used by the modulator • External Clock Input for Easier while the isolated digital interface operates from a 3V, Synchronization 3.3V, or 5V supply (DVDD). The AMC1204 is available in an SO-16 (DW) package and is specified • Fully Specified Over the Extended Industrial from –40°C to +105°C. Temperature Range APPLICATIONS • Shunt Resistor Based Current Sensing in: – Motor Control – Green Energy – Inverter Applications – Uninterruptible Power Supplies 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 © 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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