ACPL-C797T-500E

The ACPL-C797T is a 1-bit, second-order sigma-delta (S-?) modulator that converts an analog input signal into a high-speed data stream with galvanic isolation based on optical coupling technology. The ACPL-C797T operates from a 5 V power supply with dynamic range of 79 dB with an appropriate digital filter. The differential inputs of ±200 mV (full scale ±320 mV) are ideal for direct connection to shunt resistors or other low-level signal sources in applications such as motor phase current measurement. The ACPL-C797T isolated modulator converts a lowbandwidth analog input into a high-speed one-bit data stream by means of a Sigma-Delta (S-?) over-sampling modulator. The modulator data and on-chip sampling clock are encoded and transmitted across the isolation boundary where they are recovered and decoded into separate high-speed clock and data channels. Combined with superior optical coupling technology, the modulator delivers high noise margins and excellent immunity against isolation-mode transients. Offered in a a compact SSO-8 package, the isolated ADC delivers the reliability, small size, superior isolation and over-temperature performance that motor drive designers need to accurately measure current. The R2CouplerTM isolation products provide the reinforced insulation and reliability needed for critical automotive and high-temperature industrial applications.

• Qualified to AEC-Q100 Grade 1 Test Guidelines
• Automotive temperature range: -40°C to +125°C
• 1-bit, second-order sigma-delta modulator
• 10 MHz internal clock
• 16-bit resolution no missing codes (12 bits ENOB)
• Signal-to-Noise Ratio: 79 dB Typ.
• Gain error: ±1%
• ±200 mV linear range with single 5 V supply (±320 mV full scale)
• Wide supply range for digital interface: 3 V to 5.5 V
• Compact, surface mount SSO-8 package
• Superior optical isolation and insulation
• Common-mode transient immunity: 25 kV/µs
• Safety and regulatory approval:
  • IEC/EN/DIN EN 60747-5-5: 1414 VPEAK working insulation voltage
  • UL 1577: 5000 VRMS/1 minute isolation voltage
  • CSA: Component Acceptance Notice #5