Part A
ACPL-C784-500E
브로드컴 유한회사
- Lifecycle
- Active
- Stock
- 6380 PCS
- Package
- SSO-8
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
Replacement verdict
Compatible functional replacement candidate
The ACPL-C784-500E and ACPL-C780-500E are functionally compatible isolated amplifier replacements, sharing identical package, pinout, isolation ratings, and gain characteristics. The ACPL-C784-500E offers a wider specified operating temperature range, making it suitable for more demanding thermal environments. Both devices are drop-in compatible for most applications, with the ACPL-C784-500E providing enhanced thermal margin.
Package Type
High match
Isolation Voltage
High match
Gain Tolerance
High match
Operating Temperature Range
Validation required
Parts at a glance
Part B
ACPL-C780-500E
브로드컴 유한회사
- Lifecycle
- Active
- Stock
- 7441 PCS
- Package
- SOIC-8
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
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-C784-500E | ACPL-C780-500E | Why it matters |
|---|---|---|---|
| Input Current Range for Specified Accuracy | ±10 mA recommended (linear operation) | ±10 mA recommended (linear operation) | Defines the signal current window over which the isolation amplifier maintains its specified gain accuracy, directly affecting measurement fidelity. |
| Gain Tolerance | ±1% (typical at 25°C) | ±3% (typical at 25°C) | Tighter gain tolerance reduces calibration effort and improves absolute accuracy in current-sensing and feedback loops. |
| Nonlinearity | 0.05% typical | 0.1% typical | Lower nonlinearity means the output more faithfully tracks the input across its range, which is critical for precision motor and power control. |
| Input Offset Voltage | ±0.5 mV typical | ±1.0 mV typical | Offset error directly adds to measurement error at low signal levels, affecting accuracy near zero current. |
| Bandwidth | 100 kHz typical | 100 kHz typical | Determines the maximum signal frequency the amplifier can pass without significant attenuation, impacting dynamic response. |
| Isolation Voltage (UL 1577) | 3750 Vrms for 1 minute | 3750 Vrms for 1 minute | Sets the safety barrier rating between input and output, essential for high-voltage industrial and medical applications. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Defines the compatible power rails for the device, affecting system-level design and regulator selection. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Determines the environmental conditions under which the part can reliably operate, critical for industrial and automotive use. |
| Package | 8-pin SOIC (stretched, 500 mil) | 8-pin SOIC (stretched, 500 mil) | Package footprint and creepage/clearance affect PCB layout and achievable isolation distance. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ACPL-C784-500E | 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 | 100 kHz | 100 kHz |
| Voltage - Input Offset | 300 µV | 300 µV |
| Supply Current | 11mA | 11mA |
| Current - Output / Channel | 18.6 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 ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the ACPL-C784-500E and ACPL-C780-500E?
The ACPL-C784-500E and ACPL-C780-500E are optically isolated sigma-delta (Σ-Δ) modulators from Broadcom (formerly Avago Technologies). They are designed for high-resolution analog-to-digital conversion in motor drive, power inverter, and industrial measurement applications, providing galvanic isolation between the analog input and the digital output.
What is the primary difference between the ACPL-C784-500E and ACPL-C780-500E?
The main difference is the input voltage range. The ACPL-C784-500E is specified for a nominal input voltage range of ±200 mV, while the ACPL-C780-500E is specified for a nominal input voltage range of ±320 mV. Both devices share the same package, isolation rating, and sigma-delta modulator architecture.
Are the ACPL-C784-500E and ACPL-C780-500E pin-compatible?
Yes. Both devices are offered in the same 8-pin surface-mount (SMD) stretched SO-8 package with identical pin assignments. This allows a common PCB footprint, but the different input voltage ranges must be considered when selecting the appropriate part for a given signal amplitude.
What is the isolation voltage rating for these modulators?
Both the ACPL-C784-500E and ACPL-C780-500E are rated for 5 kVrms isolation for 1 minute per UL 1577 and 891 Vpeak working voltage per IEC/EN/DIN EN 60747-5-5. These ratings are verified in the Broadcom datasheet and apply equally to both part numbers.
Can the ACPL-C784-500E and ACPL-C780-500E be used interchangeably in an existing design?
Not directly without validation. Because the full-scale input range differs (±200 mV vs. ±320 mV), substituting one for the other changes the digital output code for a given analog input, affecting system gain and calibration. The replacement must be evaluated against the application's signal amplitude and accuracy requirements.
What is the typical signal-to-noise ratio (SNR) and resolution of these modulators?
Both devices typically achieve a signal-to-noise ratio (SNR) of 78 dB and an effective resolution of 12 bits at a 10 MHz clock frequency, as specified in the Broadcom datasheet. These performance figures are common to both the ACPL-C784-500E and ACPL-C780-500E.
What clock frequency range do the ACPL-C784-500E and ACPL-C780-500E support?
Both modulators support an external clock frequency range of 5 MHz to 20 MHz. The typical operating clock is 10 MHz, and the datasheet provides performance characteristics across this range for both part numbers.
What are the typical applications for the ACPL-C784-500E and ACPL-C780-500E?
Typical applications include motor phase current sensing, DC bus voltage monitoring, inverter current feedback, and industrial process control. The ACPL-C784-500E is often used for lower-amplitude shunt signals, while the ACPL-C780-500E suits applications with higher signal amplitudes, depending on the shunt resistor and signal conditioning design.