Broadcom ACPL C797 500E Optically Isolated Sigma Delta Modulator for Motor Phase Current Measurement
Product Overview
The Broadcom ACPL-C797 is a 1-bit, second-order sigma-delta (-) modulator that converts an analog input signal into a high-speed data stream with galvanic isolation using optical coupling technology. It operates from a 5-V supply and offers an 80 dB dynamic range with an appropriate digital filter. The device features differential inputs ideal for direct connection to shunt resistors for applications like motor phase current measurement. With superior optical isolation and a 0.5-mm minimum distance through insulation (DTI), it provides reliable reinforced insulation and high working insulation voltage, suitable for fail-safe designs. Offered in a Stretched SO-8 (SSO-8) package, it delivers reliability, small size, and superior isolation performance for motor drive designers.Product Attributes
- Brand: Broadcom
- Package: Stretched SO-8 (SSO-8)
- Isolation Technology: Optical Coupling
- Certifications: IEC/EN/DIN EN 60747-5-5, UL 1577, CSA
Technical Specifications
| Parameter | Symbol | Value | Units | Conditions/Notes |
|---|---|---|---|---|
| Product Name | ACPL-C797 | Optically Isolated Sigma-Delta Modulator | ||
| Resolution | 16 | Bits | Digital filter output set to 16 bits | |
| Dynamic Range | 80 | dB | With appropriate digital filter | |
| Analog Input Range (Recommended) | 200 | mV | Differential inputs | |
| Analog Input Range (Full Scale) | FSR | 320 | mV | VIN = VIN+ VIN- |
| Data Rate | 10 | MHz | Typical | |
| Supply Voltage (Analog Side) | VDD1 | 4.5 - 5.5 | V | Recommended Operating Conditions |
| Supply Voltage (Digital Side) | VDD2 | 3 - 5.5 | V | Recommended Operating Conditions |
| Operating Temperature Range | TA | -40 to +105 | C | |
| Common-Mode Transient Immunity | CMR | 25 | kV/s | |
| Working Insulation Voltage | VIORM | 1414 | Vpeak | IEC/EN/DIN EN 60747-5-5 |
| Isolation Voltage (UL 1577) | VISO | 5000 | Vrms/1 min | |
| Distance Through Insulation (DTI) | 0.5 | mm | Minimum | |
| Signal-to-Noise Ratio | SNR | 78 | dB | Min. (Typ. 78 dB) |
| Offset Drift vs. Temperature | TCVOS | 3.5 | V/C | Max. |
| Gain Error | GE | 1 | % | Max. |
| Internal Reference Voltage | VREF | 320 | mV | Typ. |
| Applications | Motor phase and rail current sensing, Power inverter current and voltage sensing, Industrial process control, Data acquisition systems, General purpose current and voltage sensing, Traditional current transducer replacements | |||
2410010204_Broadcom-ACPL-C797-500E_C691942.pdf
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