Part A
ACPL-C87B-000E
ブロードコム株式会社
- Lifecycle
- Active
- Stock
- 7760 個数
- Package
- SSO-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The ACPL-C87B-000E is a viable functional replacement candidate for the ACPL-C784-500E in isolated voltage sensing applications, with matching isolation voltage, package footprint, and supply voltage range. However, designers must validate the output interface and bandwidth requirements, as the ACPL-C87B-000E provides a differential analog output with wider bandwidth compared to the ACPL-C784-500E.
Isolation Voltage
High match
Package Type
High match
Output Type
Validation required
Bandwidth
Validation required
Parts at a glance
Part B
ACPL-C784-500E
ブロードコム株式会社
- Lifecycle
- Active
- Stock
- 6380 個数
- Package
- SSO-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
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-C87B-000E | Why it matters |
|---|---|---|---|
| Manufacturer | Broadcom | Broadcom | Confirms both parts come from the same supplier, which simplifies sourcing and qualification. |
| Function | Isolation amplifier | Isolation amplifier | Both devices serve the same signal-isolation role, making them candidates for substitution in similar circuits. |
| Input Signal Type | Analog voltage input | Analog voltage input | Matching input type ensures the replacement can interface with the same sensor or signal source. |
| Output Type | Differential analog output | Differential analog output | Identical output topology allows the downstream ADC or controller to remain unchanged. |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | Sufficient and equal isolation rating is critical for safety and compliance in high-voltage applications. |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Compatible supply rails mean the same power design can support either device. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Equivalent thermal range ensures reliable operation in the same environmental conditions. |
| Package / Mounting | Surface mount, 8-pin SOIC | Surface mount, 8-pin SOIC | Same footprint and mounting style allow drop-in replacement without PCB redesign. |
| Gain Accuracy | ±1% typical | ±1% typical | Matching gain accuracy preserves measurement precision in current or voltage sensing loops. |
| Bandwidth | 100 kHz typical | 100 kHz typical | Equal bandwidth supports the same dynamic signal response in control and monitoring systems. |
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-C87B-000E | 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 functional differences between the ACPL-C784-500E and the ACPL-C87B-000E?
The ACPL-C784-500E is an isolation amplifier designed for current sensing and motor phase current measurement, featuring a ±3% gain tolerance and a 200 kHz bandwidth. The ACPL-C87B-000E is a precision optically isolated voltage sensor with a ±0.5% gain tolerance and a 100 kHz bandwidth, specifically intended for DC bus voltage sensing in high-voltage systems.
Are the ACPL-C784-500E and ACPL-C87B-000E pin-to-pin compatible?
Yes, both devices are offered in the same 8-pin surface-mount DIP (Stretched SO-8) package, sharing an identical pinout. However, because their input and output functional blocks differ (current shunt input versus high-impedance voltage divider input), direct substitution requires verifying the external signal conditioning circuitry.
What are the input voltage ranges for the ACPL-C784-500E and ACPL-C87B-000E?
The ACPL-C784-500E has a nominal input voltage range of ±200 mV (with a recommended full-scale range of ±320 mV) for shunt-based current sensing. The ACPL-C87B-000E has a nominal input voltage range of ±2 V (with a full-scale range of ±2.56 V) for direct high-voltage bus sensing via an external resistor divider.
Which device offers better gain accuracy and temperature stability?
The ACPL-C87B-000E provides superior gain accuracy with a specified gain tolerance of ±0.5% at 25°C and a gain drift of ±30 ppm/°C. The ACPL-C784-500E specifies a gain tolerance of ±3% at 25°C with a gain drift of ±50 ppm/°C, making the C87B more suitable for precision voltage monitoring applications.
Can the ACPL-C784-500E be used for DC bus voltage sensing like the ACPL-C87B-000E?
No, the ACPL-C784-500E is not intended for direct DC bus voltage sensing. Its low input impedance and small input voltage range are optimized for shunt-based current measurement. Using it for voltage sensing would require additional signal conditioning and would not achieve the accuracy or isolation performance of the ACPL-C87B-000E.
What are the isolation voltage ratings for these two components?
Both the ACPL-C784-500E and ACPL-C87B-000E are rated for a maximum working isolation voltage of 891 Vpeak (VIORM) and a transient isolation voltage of 5000 Vrms for 1 minute (UL 1577). They share the same reinforced insulation construction and are certified to IEC/EN/DIN EN 60747-5-5 standards.
What is the operating temperature range for the ACPL-C784-500E and ACPL-C87B-000E?
Both devices are specified for an industrial operating temperature range of –40°C to +105°C. Performance parameters such as gain drift, offset drift, and bandwidth are guaranteed across this full temperature range per the respective manufacturer datasheets.
Which device is better suited for motor phase current sensing in a three-phase inverter?
The ACPL-C784-500E is specifically designed for motor phase current sensing due to its ±200 mV input range, 200 kHz bandwidth, and fast 2 µs response time, which are optimized for shunt-based current feedback loops. The ACPL-C87B-000E is optimized for DC bus voltage monitoring and is not recommended for phase current sensing.