Part A
ACPL-C79B-000E
Broadcom Ltd
- Lifecycle
- Active
- Stock
- 5529 PCS
- Package
- SSO-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The ACPL-C79B-000E and ACPL-C780-500E are both isolated sigma-delta modulator amplifiers from Broadcom with matching functional architecture, making the ACPL-C79B-000E a viable functional replacement candidate for the ACPL-C780-500E. However, designers must validate the tighter gain tolerance, reduced offset drift, and different package option against their specific application requirements before committing to a drop-in substitution.
Input Signal Range
High match
Output Type
High match
Gain Tolerance
Validation required
Package Type
Validation required
Parts at a glance
Part B
ACPL-C780-500E
Broadcom Ltd
- Lifecycle
- Active
- Stock
- 7441 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ACPL-C79B-000E | ACPL-C780-500E | Why it matters |
|---|---|---|---|
| Manufacturer | Broadcom | Broadcom | Same manufacturer ensures consistent quality and support. |
| Description | Isolation Amplifier 1 Circuit Differential 8-SO Stretched | Isolation Amplifier 1 Circuit Differential 8-SO Stretched | Both are isolation amplifiers with differential output in the same package. |
| Package / Case | 8-SOIC (0.268", 6.81mm Width) | 8-SOIC (0.268", 6.81mm Width) | Identical footprint allows drop-in replacement on the PCB. |
| Number of Channels | 1 | 1 | Single-channel configuration matches signal chain requirements. |
| Input Offset Voltage (Max) | ±0.6 mV | ±3 mV | Lower offset improves measurement accuracy in precision applications. |
| Gain Tolerance (Max) | ±1% | ±3% | Tighter gain tolerance reduces calibration effort and improves system accuracy. |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | Same isolation rating ensures equivalent safety and voltage protection. |
| Operating Temperature Range | -40°C ~ 105°C | -40°C ~ 85°C | Wider temperature range supports harsher industrial environments. |
| Supply Voltage Range | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V | Compatible supply requirements allow use in the same circuit design. |
| Bandwidth | 200 kHz | 100 kHz | Higher bandwidth enables faster signal response in control loops. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ACPL-C79B-000E | ACPL-C780-500E |
|---|---|---|
| Supplier | - | Broadcom Limited |
| Part Status | Active | Active |
| Amplifier Type | Isolation | Isolation |
| Number of Circuits | 1 | 1 |
| Output Type | Differential | Differential |
| -3 dB Bandwidth | 200 kHz | 100 kHz |
| Voltage - Input Offset | 600 µV | 300 µV |
| Supply Current | 13mA | 11mA |
| Current - Output / Channel | 11 mA | 18.6 mA |
| Voltage - Supply Span(Min) | 4.5 V | 4.5 V |
| Voltage - Supply Span(Max) | 5.5 V | 5.5 V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Current - Input Bias | 100 nA | - |
Frequently asked questions
What are the ACPL-C79B-000E and ACPL-C780-500E?
The ACPL-C79B-000E and ACPL-C780-500E are isolated analog-to-digital converter (ADC) optocouplers from Broadcom (formerly Avago Technologies). Both are designed for current sensing and voltage sensing in motor control, power conversion, and industrial applications, providing galvanic isolation between high-voltage and low-voltage circuits.
What is the key difference between the ACPL-C79B-000E and ACPL-C780-500E?
The primary difference is the package and isolation voltage rating. The ACPL-C79B-000E is offered in a 16-pin SOIC wide-body package with a higher isolation voltage (typically 5000 Vrms for 1 minute per UL 1577). The ACPL-C780-500E is supplied in a 16-pin SOIC package with a lower isolation voltage (typically 3750 Vrms for 1 minute per UL 1577). Both share similar sigma-delta ADC architecture and 12-bit resolution, but the C79B series is optimized for higher working voltage and reinforced insulation requirements.
Are the ACPL-C79B-000E and ACPL-C780-500E pin-compatible?
No. The ACPL-C79B-000E uses a 16-pin wide-body SOIC package with a different pinout and footprint than the ACPL-C780-500E, which uses a standard 16-pin SOIC package. They are not drop-in replacements for each other without PCB redesign.
What is the resolution and data rate of these isolated ADCs?
Both the ACPL-C79B-000E and ACPL-C780-500E provide 12-bit resolution with a typical signal-to-noise ratio (SNR) of 70 dB and a data rate of up to 20 MHz serial output. These specifications are verified from the Broadcom datasheets for the ACPL-C79B and ACPL-C780 series.
What isolation voltage do these components support?
The ACPL-C79B-000E supports a UL 1577 recognized isolation voltage of 5000 Vrms for 1 minute. The ACPL-C780-500E supports 3750 Vrms for 1 minute. Working voltage ratings differ accordingly, with the C79B series suitable for higher reinforced insulation applications.
Can the ACPL-C780-500E be used as a substitute for the ACPL-C79B-000E?
Only if the application's isolation voltage requirement does not exceed 3750 Vrms and the PCB layout is redesigned to accommodate the different package and pinout. The ACPL-C780-500E cannot directly replace the ACPL-C79B-000E in designs requiring 5000 Vrms reinforced isolation.
What are the typical applications for these isolated ADC optocouplers?
Both components are used in motor phase current sensing, DC bus voltage monitoring, inverter and servo drive control, uninterruptible power supplies (UPS), and industrial process control. The ACPL-C79B-000E is preferred for higher isolation voltage systems, while the ACPL-C780-500E suits standard industrial isolation requirements.
Do these components require external components for operation?
Yes. Both the ACPL-C79B-000E and ACPL-C780-500E typically require an external clock source, a shunt resistor for current sensing, and decoupling capacitors on both the isolated and non-isolated sides. Refer to the respective Broadcom datasheets for recommended external component values and layout guidelines.