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CA-IS1311G

Ordering Code CA-IS1311G Category

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Isolated Amplifier for Voltage Sensing

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CA-IS1311G

Order Code CA-IS1311G Category

Description

CA-IS1311G

Isolated Amplifier for Voltage Sensing

The CA-IS1311 devices are high-precision reinforced isolated amplifiers and optimized for voltage sensing. Low offset and gain error and drift guarantee that measuring accuracy is maintained over the entire operating temperature range.

The CA-IS1311 devices utilize silicon oxide (SiO2) isolation barriers and support up to 5-kVRMS galvanic isolation per UL 1577. This technology separates high- and low-voltage domain to protect lower-voltage parts from damage and provides low emissions as well as strong anti-interference capability from magnetic changes. The high common-mode transient immunity (CMTI) means that the CA-IS1311 devices transmit correct signals through isolation barriers and are suitable for industrial motor controls and drives which require high-voltage and high-power switching. The internal missing or undervoltage lockout (UVLO) of highside supply voltage detection functions contribute to fault diagnostics and system safety.

The input of CA-IS1311 is high-impedance, making it suitable for applications where the measured signal sources have high output resistance (such as high-voltage resistive dividers). The CA-IS1311 devices have shutdown mode, which could shut down the high-side circuit by pulling up SHTDN pin to save power.

The CA-IS1311 devices are packaged in wide body, 8-pin SOIC packages and specified over the extended industrial temperature range of –40°C to 125°C.

Features

  • Input Voltage Range – –0.1 V to 2 V
  • High Input Impedance – 1 GΩ (typ)
  • Fixed Initial Gain – 1
  • Low Input Offset and Drift – ±1.5 mV (max) at 25°C, ±15 μV/°C (max)
  • Low Gain Error and Drift – ±0.3% (max) at 25°C, ±40 ppm/°C (max)
  • 3.3-V or 5-V Operation for Both High- and Low-Side
  • Wide Operating Temperature Range – –40°C to 125°C
  • High CMTI – ±150 kV/µs (typ, CA-IS1311BG)
  • Safety-Related Certifications
    • 7-kVPK Isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5-kVRMS Isolation for 1 Minute per UL 1577
    • TUV Certification Approvals
  • >40-year Life at Rated Working Voltage

Applications

  • Industrial Motor Controls and Drives
  • Isolated Switch Mode Supplies
  • Uninterruptible Power Supplies