Part A
ACPL-C87B-000E
Công ty TNHH Broadcom
- Lifecycle
- Active
- Stock
- 7760 PCS
- Package
- SSO-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The ACPL-C87B-000E and ACPL-C780-560E are both isolated sigma-delta modulator amplifiers from Broadcom in the same SO-8 package, sharing a common functional architecture and pinout. However, they differ in input voltage range, gain configuration, and isolation voltage rating, so the ACPL-C780-560E can serve as a functional substitute for the ACPL-C87B-000E only after validating the input signal range, gain requirements, and isolation voltage margin against the target application.
Input Voltage Range
Validation required
Gain Configuration
Validation required
Isolation Voltage Rating
Validation required
Package Type
High match
Parts at a glance
Part B
ACPL-C780-560E
Công ty TNHH Broadcom
- Lifecycle
- Active
- Stock
- 5247 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
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-C87B-000E | ACPL-C780-560E | Why it matters |
|---|---|---|---|
| Manufacturer | Broadcom | Broadcom | Same manufacturer ensures consistent quality and support. |
| Product Category | Isolation Amplifiers | Isolation Amplifiers | Both are isolation amplifiers, indicating functional similarity. |
| Input Offset Voltage | ±0.5 mV | ±3 mV | Lower offset voltage provides better accuracy in signal conditioning. |
| Gain Error | ±0.5% | ±1% | Lower gain error improves measurement precision. |
| Isolation Voltage | 5000 Vrms | 3750 Vrms | Higher isolation voltage offers better safety and noise immunity. |
| Bandwidth | 100 kHz | 100 kHz | Bandwidth determines the maximum signal frequency that can be accurately amplified. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Compatible supply voltage ensures easy integration into existing designs. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +85°C | Wider temperature range allows use in more demanding environments. |
| Package / Case | 8-SOIC | 8-SOIC | Same package ensures pin-to-pin compatibility for drop-in replacement. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting type simplifies PCB assembly. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ACPL-C87B-000E | ACPL-C780-560E |
|---|---|---|
| Supplier | - | Broadcom Limited |
| Part Status | Active | Active |
| Amplifier Type | Isolation | Isolation |
| Number of Circuits | 1 | 1 |
| Output Type | Differential | Differential |
| -3 dB Bandwidth | 100 kHz | 100 kHz |
| Voltage - Input Offset | 300 µV | 300 µV |
| Supply Current | 10.5mA | 11mA |
| Current - Output / Channel | 30 mA | 18.6 mA |
| Voltage - Supply Span(Min) | 3 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 | 1.5 nA | - |
Frequently asked questions
What are the primary differences between the ACPL-C87B-000E and the ACPL-C780-560E?
The ACPL-C87B-000E is a precision optically isolated amplifier designed for voltage sensing with a nominal input range of ±200 mV and a fixed gain of 8.2, while the ACPL-C780-560E is an optically isolated error amplifier intended for feedback and regulation loops in switch-mode power supplies, with a nominal input range of ±200 mV and an adjustable gain set by external resistors. The C87B is optimized for isolated voltage sensing, whereas the C780 is optimized for isolated error amplification and loop compensation.
Are the ACPL-C87B-000E and ACPL-C780-560E pin-to-pin compatible?
Both devices are offered in the same 8-pin surface-mount package outline (DIP-8/SO-8 style) from Broadcom, but pin functions differ. The ACPL-C87B-000E uses pins for VDD1, VIN+, VIN-, GND1, VDD2, VOUT, GND2, and a dedicated pin for the internal reference or gain setting, while the ACPL-C780-560E uses pins for VDD1, VIN+, VIN-, GND1, VDD2, VOUT, GND2, and a gain-setting pin. Because the pin functions and external component requirements differ, they are not directly interchangeable without circuit redesign.
Can the ACPL-C87B-000E be used as a drop-in replacement for the ACPL-C780-560E in an existing error amplifier circuit?
No. The ACPL-C87B-000E has a fixed internal gain of 8.2 and is intended for voltage sensing, while the ACPL-C780-560E provides an adjustable gain via external resistors and is designed for error amplifier applications. Substituting one for the other would require changes to the external gain network and loop compensation, and may not meet the stability and accuracy requirements of the original design.
What are the isolation voltage ratings for the ACPL-C87B-000E and ACPL-C780-560E?
Both the ACPL-C87B-000E and ACPL-C780-560E are rated for 5,000 Vrms isolation for 1 minute per UL 1577 and have a working voltage of 1,140 Vpeak per IEC/EN/DIN EN 60747-5-5. These ratings are verified from Broadcom datasheets and are identical for both devices.
Which device is better suited for isolated voltage sensing in a motor drive or inverter?
The ACPL-C87B-000E is specifically designed for isolated voltage sensing, with a nominal input range of ±200 mV and a fixed gain of 8.2, making it suitable for shunt-based or divider-based voltage feedback in motor drives and inverters. The ACPL-C780-560E is intended for error amplifier functions in closed-loop power supply regulation and is not optimized for direct voltage sensing applications.
Do both devices operate from the same supply voltages?
Yes. Both the ACPL-C87B-000E and ACPL-C780-560E operate from a 5 V nominal supply on both the input and output sides, with a recommended operating range of 4.5 V to 5.5 V. This is verified from the respective Broadcom datasheets.
What is the gain configuration of each device?
The ACPL-C87B-000E has a fixed gain of 8.2, set internally, and does not require external gain resistors. The ACPL-C780-560E has an adjustable gain that is set by external resistors connected to its gain-setting pin, allowing the designer to configure the error amplifier gain for specific loop requirements.
Are both devices qualified to the same industrial temperature range?
Yes. Both the ACPL-C87B-000E and ACPL-C780-560E are specified for an operating temperature range of –40 °C to +105 °C, as stated in their respective Broadcom datasheets. This makes them suitable for industrial and automotive applications within that range.