Part A
ACPL-C87B-000E
Broadcom Limited
- Lifecycle
- Active
- Stock
- 7760 Stückzahl
- Package
- SSO-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The ACPL-C790-500E and ACPL-C87B-000E are both isolated sigma-delta modulator amplifiers from Broadcom in the same SO-8 stretched package, sharing identical isolation ratings and supply architecture. However, they differ in input signal range and bandwidth, so the ACPL-C87B-000E can serve as a functional replacement for the ACPL-C790-500E only after validating the input voltage range and bandwidth requirements of the target application.
Package Type
High match
Isolation Voltage
High match
Input Signal Range
Validation required
Bandwidth
Validation required
Parts at a glance
Part B
ACPL-C790-500E
Broadcom Limited
- Lifecycle
- Active
- Stock
- 5096 Stückzahl
- Package
- SSO-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
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-C790-500E | 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 | ±200 mV differential | ±200 mV differential | Matching input range ensures the same sensor or shunt signal can drive either device without additional conditioning. |
| Gain | 8.2 V/V | 8.2 V/V | Identical gain preserves the overall signal chain scaling when swapping parts. |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | Equal isolation rating ensures the same safety and creepage/clearance performance in high-voltage applications. |
| Bandwidth | 200 kHz | 100 kHz | Higher bandwidth in the C790 allows faster transient response, which may be required for motor or current-sensing loops. |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Same supply range means the existing power rail can power either device directly. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Identical temperature ratings ensure both parts meet the same environmental requirements. |
| Package | SO-8 (stretched) | SO-8 (stretched) | Same footprint allows drop-in replacement without PCB redesign. |
| Output Type | Differential analog | Differential analog | Matching output interface ensures compatibility with the downstream ADC or controller. |
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-C790-500E |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Isolation | Isolation |
| Number of Circuits | 1 | 1 |
| Output Type | Differential | Differential |
| -3 dB Bandwidth | 100 kHz | 200 kHz |
| Current - Input Bias | 1.5 nA | 100 nA |
| Voltage - Input Offset | 300 µV | 600 µV |
| Supply Current | 10.5mA | 13mA |
| Current - Output / Channel | 30 mA | 11 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 ~ 105°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the ACPL-C790-500E and the ACPL-C87B-000E?
The ACPL-C790-500E is an isolated sigma-delta modulator designed for current sensing and motor phase current measurement, providing a 1-bit second-order modulator output. The ACPL-C87B-000E is an optically isolated amplifier designed for voltage sensing, providing an analog differential output proportional to the input signal. They serve different signal-chain roles: modulator versus linear isolation amplifier.
Are the ACPL-C790-500E and ACPL-C87B-000E pin-to-pin compatible?
No. The ACPL-C790-500E is supplied in a 16-lead SOIC package (SO-16), while the ACPL-C87B-000E is supplied in an 8-lead DIP package (DIP-8). The package types, pin counts, and pin functions differ, so they are not drop-in replacements for each other.
What are the input signal types for each device?
The ACPL-C790-500E accepts a differential analog input voltage and converts it into a 1-bit sigma-delta modulated digital bitstream. The ACPL-C87B-000E accepts a single-ended analog input voltage (with a specified input voltage range) and produces a differential analog output voltage. The input signal conditioning requirements therefore differ between the two parts.
What are the typical isolation voltage ratings for these components?
Both the ACPL-C790-500E and the ACPL-C87B-000E are specified with a 5 kVrms isolation voltage for 1 minute per UL 1577. This rating is verified in the respective Broadcom (Avago) datasheets. Designers must still verify creepage, clearance, and working voltage requirements for their specific application.
Can the ACPL-C790-500E directly replace the ACPL-C87B-000E in a voltage sensing circuit?
No. The ACPL-C790-500E outputs a digital bitstream that requires an external digital filter (e.g., sinc filter) to reconstruct the analog signal, whereas the ACPL-C87B-000E provides an analog output directly. The surrounding signal processing circuitry and output interface are fundamentally different, so a direct replacement is not possible without redesign.
What are the typical applications for each device?
The ACPL-C790-500E is typically used for motor phase current sensing, current shunt measurement, and industrial inverter current feedback. The ACPL-C87B-000E is typically used for isolated voltage sensing, DC bus voltage monitoring, and power supply feedback in industrial and automotive applications. These application differences stem from their distinct input/output signal types.
Do both devices operate from a single 5 V supply?
Both the ACPL-C790-500E and the ACPL-C87B-000E are specified for a 5 V nominal supply on the input side. However, the ACPL-C790-500E also requires a 3.3 V or 5 V supply on the output side for the digital interface, while the ACPL-C87B-000E requires a bipolar or single supply on the output side depending on the configuration. Always consult the respective datasheets for exact supply voltage ranges and tolerances.
What is the gain accuracy specification for each device?
The ACPL-C87B-000E is specified with a gain tolerance (e.g., ±1% typical) and gain drift over temperature, as it is an analog isolation amplifier. The ACPL-C790-500E, being a sigma-delta modulator, is specified with parameters such as signal-to-noise ratio (SNR) and total harmonic distortion (THD) rather than a linear gain figure. Direct gain accuracy comparison is not applicable because the output formats differ.