AMC1204BDC Delta-Sigma Modulator

Texas Instruments' 16-Bit, 20 MHz isolated Δ-Σ modulator, ideal for current shunt measurements

Image of Texas Instruments' AMC1204BDC Delta-Sigma ModulatorTexas Instruments' AMC1204B (4250VPEAK) provides a single-chip solution for measuring the small signal of a shunt resistor across an isolated barrier. These types of resistors are typically used to sense currents in motor control inverters, green energy generation systems, and other industrial applications. The AMC1204B differential inputs easily connect to the shunt resistor or other low-level signal sources. An internal reference eliminates the need for external components. When used with an appropriate external digital filter, an effective number of bits (ENOB) of 14 can be achieved at a data rate of 78 kSPS.

A 5 V analog supply (AVDD) is used by the modulator while the isolated digital interface operates from a 3 V, 3.3 V, or 5 V supply (DVDD). The AMC1204B is available in a SO-16 (DW) package and is specified from -40°C to +105°C.

Features
  • ±250 mV input voltage range optimized for shunt resistors
  • Certified digital isolation:
    • CSA, IEC60747-5-2, and UL1577 approved
    • Isolation voltage: 4250 VPEAK
    • Working voltage: 1200 VPEAK
    • Transient immunity: 15 kV/µs
  • Long isolation barrier lifetime (see application report SLLA197)
  • High electromagnetic field immunity
  • Outstanding AC performance:
    • SNR: 84 dB (min)
    • THD: -80 dB (max)
Applications
  • High-voltage motor control
  • Power inverter
  • Wind turbine
  • Uninterruptible power supply (UPS)

AMC1204BDC Delta-Sigma Modulator

ImageManufacturer Part NumberDescriptionTypeResolution (Bits)Available Quantity
AMC1204BDW datasheet linkIC DELTA-SIGMA MOD 16BIT 16SOICAMC1204BDWIC DELTA-SIGMA MOD 16BIT 16SOICModulator16 b285 - Immediate
4200 - Factory Stock
AMC1204BDW product page link

Evaluation Module

ImageManufacturer Part NumberDescriptionNumber of A/D ConvertersNumber of BitsSampling Rate (Per Second)Available Quantity
AMC1204EVM datasheet linkEVAL MODULE FOR AMC1204AMC1204EVMEVAL MODULE FOR AMC120411678k1 - Immediate
AMC1204EVM product page link
Published: 2012-11-19