AMC3301 ±250-mV input, precision reinforced isolated amplifier with integrated DC/DC converter | TI.com

AMC3301
This product is prototype/experimental and has not been released to the market. Testing and final processes may not be complete. This product may be subject to further changes or possible discontinuation.
±250-mV input, precision reinforced isolated amplifier with integrated DC/DC converter

 

Sample availability

Preproduction samples are available (PAMC3301DWER). Order now

Description

The AMC3301 is a precision, isolated amplifier with a fully integrated, isolated DC/DC converter that allows single-supply operation from the low-side of the device. The reinforced capacitive isolation barrier is certified according to VDE V 0884-11 and UL1577 and separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage.

The input of the AMC3301 is optimized for direct connection to shunt resistors or other low voltage-level signal sources. The integrated isolated DC/DC converter allows flexible placement of the shunt and the AMC3301, and makes the device a unique solution for space-constrained applications.

The excellent performance of the device supports accurate current monitoring and control, resulting in system-level power savings and, especially in motor control applications, low torque ripple. The integrated input common-mode overvoltage and DC/DC converter operation fault detection features of the AMC3301 simplify system-level design and diagnostics.

The AMC3301 is specified over the extended industrial temperature range of –40°C to +125°C.

Features

  • 3.3-V or 5-V single supply, CISPR11-compliant operation with integrated DC/DC converter
  • ±250-mV input voltage range optimized for current measurement using shunt resistors
  • Fixed gain: 8.2
  • Low DC errors:
    • Initial offset voltage: ±0.2 mV (max)
    • Offset drift: ±5 µV/°C (max)
    • Initial gain error: ±0.4% (max)
    • Gain drift: ±60 ppm/°C (max)
    • Initial nonlinearity: ±0.075% (max)
  • System-level diagnostic features
  • Safety-related certifications:
    • 7071-VPK reinforced isolation per DIN VDE V 0884-11 (VDE V 0884-11): 2017-01
    • 5000-VRMS isolation for 1 minute per UL1577
  • High CMTI: 75 kV/µs (min)

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Parametrics

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Part number Order Input range (Vp-p) Isolation working voltage VIOWM (rms) (V) Isolation transient overvoltage VIOTM (peak) (V) CMTI (Min) (kV/µs) Input offset (+/-) (Max) (mV) Input offset drift (+/-) (Typ) (uV/C) Gain error (+/-) (Max) (%) Gain error drift (+/-) (Typ) (ppm/°C) Gain non-linearity (+/-) (Max) (%) Small signal bandwidth (Typ) (kHz) Rating Operating temperature range (C)
AMC3301 Order now 0.25     1000     7071     75     0.25     1.5     0.4     20     0.075     310     Catalog     -40 to 125