Part A
ACPL-C87A-500E
компанией Broadcom Limited
- Lifecycle
- Active
- Stock
- 7176 ПКС
- Package
- SSO-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Replacement verdict
Compatible functional replacement candidate
The ACPL-C87A-500E is a viable functional replacement candidate for the ACPL-C784-500E in isolated voltage sensing applications, with identical package footprint, isolation rating, and supply voltage requirements. Designers must validate the tighter gain tolerance and reduced input offset voltage of the ACPL-C87A-500E against system accuracy budgets before committing to a drop-in substitution.
Package Type
High match
Isolation Voltage
High match
Supply Voltage
High match
Gain Tolerance
Validation required
Parts at a glance
Part B
ACPL-C784-500E
компанией Broadcom Limited
- Lifecycle
- Active
- Stock
- 6380 ПКС
- Package
- SSO-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
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-C87A-500E | Why it matters |
|---|---|---|---|
| Input Type | Analog (shunt-based current sensing) | Analog (voltage sensing) | Determines the physical quantity the isolator is designed to measure, affecting whether it can be dropped into a given sensing circuit. |
| Input Signal Range | ±200 mV (recommended linear input) | ±2 V (recommended linear input) | The full-scale input range must match the sensor/shunt output to preserve accuracy and avoid clipping or poor resolution. |
| Isolation Voltage (VISO) | 5000 Vrms (UL 1577, 1 min) | 5000 Vrms (UL 1577, 1 min) | Higher isolation voltage provides greater safety margin in high-voltage applications; matching values indicate equivalent safety capability. |
| Gain | 8.2 (typical, fixed) | 1 (unity, fixed) | Fixed gain defines the transfer function from input to output; a mismatch requires external signal conditioning to maintain system calibration. |
| Bandwidth | 100 kHz (typical, -3 dB) | 100 kHz (typical, -3 dB) | Bandwidth limits the maximum signal frequency that can be accurately transmitted, critical for motor control and power conversion loops. |
| Output Type | Differential analog voltage | Differential analog voltage | Differential outputs improve noise immunity and allow direct interface to differential ADCs, affecting downstream circuit design. |
| Supply Voltage (VDD1/VDD2) | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Compatible supply rails allow the same power architecture to be reused without redesigning the power tree. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Industrial temperature range ensures reliable operation in harsh environments and matches application thermal requirements. |
| Package | 8-pin SOIC (stretched, 500 mil) | 8-pin SOIC (stretched, 500 mil) | Identical package footprint enables direct PCB drop-in replacement without layout changes. |
| Nonlinearity | ±0.05% (typical) | ±0.05% (typical) | Low nonlinearity preserves measurement accuracy across the input range, important for precision current/voltage sensing. |
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-C87A-500E | ACPL-C784-500E |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Isolation | Isolation |
| Number of Circuits | 1 | 1 |
| Output Type | Differential | Differential |
| -3 dB Bandwidth | 100 kHz | 100 kHz |
| Current - Input Bias | 1.5 nA | - |
| 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 |
Frequently asked questions
What are the primary differences between the ACPL-C784-500E and the ACPL-C87A-500E?
The ACPL-C784-500E is an isolation amplifier designed for current sensing with a ±3% gain tolerance and a 200 kHz bandwidth. The ACPL-C87A-500E is a precision optically isolated voltage sensor with a ±1% gain tolerance and a 100 kHz bandwidth. The C87A is optimized for voltage sensing with higher accuracy, while the C784 is optimized for current sensing with wider bandwidth.
Are the ACPL-C784-500E and ACPL-C87A-500E pin-to-pin compatible?
Yes, both devices are offered in the same 8-pin surface-mount package (SO-8) with identical pinouts. However, pin-to-pin compatibility does not guarantee functional equivalence; the input configurations and internal signal conditioning differ, so circuit design must be validated for each specific application.
What is the input voltage range for the ACPL-C87A-500E?
The ACPL-C87A-500E is specified for a nominal input voltage range of ±200 mV, with a full-scale input range of ±320 mV. It is intended for isolated voltage sensing across a shunt resistor or resistive divider.
What is the input voltage range for the ACPL-C784-500E?
The ACPL-C784-500E is specified for a nominal input voltage range of ±200 mV, with a full-scale input range of ±320 mV. It is intended for isolated current sensing when used with an external shunt resistor.
What are the isolation voltage ratings for these components?
Both the ACPL-C784-500E and ACPL-C87A-500E are rated for 5 kVrms isolation for 1 minute per UL 1577. They also carry IEC/EN/DIN EN 60747-5-5 approval with a working voltage of 891 Vpeak and a transient overvoltage of 6 kVpeak.
What is the operating temperature range for the ACPL-C784-500E and ACPL-C87A-500E?
Both devices are specified for an operating temperature range of –40 °C to +105 °C. Performance parameters such as gain drift and offset drift are guaranteed over this temperature range.
Which device is better suited for motor phase current sensing?
The ACPL-C784-500E is generally better suited for motor phase current sensing due to its 200 kHz bandwidth, which allows faster response to current transients. The ACPL-C87A-500E has a 100 kHz bandwidth and is more appropriate for DC bus voltage sensing or precision voltage monitoring.
Do both devices require an external clock or carrier signal?
No. Both the ACPL-C784-500E and ACPL-C87A-500E are stand-alone optically isolated amplifiers that do not require an external clock or carrier signal. They internally generate the modulation and demodulation necessary for signal isolation.
What are the typical applications for the ACPL-C87A-500E compared to the ACPL-C784-500E?
The ACPL-C87A-500E is typically used for isolated voltage sensing in DC bus monitoring, inverter voltage feedback, and power supply regulation. The ACPL-C784-500E is typically used for isolated current sensing in motor drive phase current feedback, switching power supply current monitoring, and overcurrent protection circuits.