Overview
The Broadcom Limited ACPL-C87BT-500E is a high-precision optically isolated voltage sensor designed for accurate DC voltage sensing in various applications. This component utilizes advanced sigma-delta (Σ-Δ) modulation technology, chopper-stabilized amplifiers, and a fully differential circuit topology to provide exceptional isolation-mode noise rejection, low offset, and high gain accuracy and stability.
It is packaged in a compact, auto-insertable Stretched SO-8 (SSO-8) package, meeting worldwide regulatory safety standards such as UL 1577 and IEC/EN/DIN EN 60747-5-5. The ACPL-C87BT-500E is particularly suited for applications requiring high precision and reliability, such as in automotive systems, DC/DC and AC/DC converters, and battery monitoring systems.
Key Specifications
| Parameter | Symbol | Min. | Typ. | Max. | Unit | Test Conditions/Notes |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | -9.9 | -0.3 | 9.9 | mV | TA = 25°C |
| Gain (ACPL-C87BT, ± 0.5%) | G0 | 0.995 | 1 | 1.005 | V/V | TA = 25°C; VDD2 = 5V |
| Input Range | VIN | 0 | - | 2V | V | |
| Input Impedance | - | - | - | 1 GΩ | ||
| Supply Voltage (Input Side) | VDD1 | 4.5 | - | 5.5 | V | |
| Supply Voltage (Output Side) | VDD2 | 3 | - | 5.5 | V | |
| Bandwidth | f-3 dB | 70 | 100 | - | kHz | Guaranteed by design |
| Shutdown Pin | SHDN | - | - | - | Active High |
Key Features
- Advanced Sigma-Delta (Σ-Δ) Modulation Technology: Provides high accuracy and stability in voltage sensing.
- High Input Impedance: 1 GΩ input impedance for minimal loading on the input signal.
- Unity Gain with High Accuracy: ±0.5% gain accuracy for precise voltage measurement.
- Low Offset and Drift: Low offset voltage and drift ensure consistent performance over temperature variations.
- High Common-Mode Transient Immunity: 15 kV/µs immunity to ensure robust operation in noisy environments.
- Active-High Shutdown Pin: Allows for power saving and external control of the shutdown feature.
- Wide Supply Range: Supports supply voltages from 3V to 5.5V on the output side.
- Compact Packaging: Stretched SO-8 (SSO-8) package for easy integration into various designs.
Applications
- Automotive Battery Management Systems (BMS): For precise battery pack voltage sensing.
- Automotive DC/DC and AC/DC Converters: For voltage sensing in DC/DC and AC/DC converters.
- Automotive Motor Inverter DC Bus Voltage Sensing: For monitoring DC bus voltages in motor inverters.
- Automotive AC/DC (Charger) DC Output Voltage Sensing: For monitoring DC output voltages in chargers.
- Isolation Interface for Temperature Sensing: For isolating temperature sensing signals.
- General-Purpose Voltage Sensing and Monitoring: For various industrial and commercial applications requiring high-precision voltage sensing.
Q & A
- What is the input voltage range of the ACPL-C87BT-500E?
The input voltage range is from 0 to 2 V.
- What is the gain accuracy of the ACPL-C87BT-500E?
The gain accuracy is ±0.5%.
- What is the input impedance of the ACPL-C87BT-500E?
The input impedance is 1 GΩ.
- What is the supply voltage range for the input and output sides?
The input side supply voltage range is 4.5V to 5.5V, and the output side supply voltage range is 3V to 5.5V.
- Does the ACPL-C87BT-500E have a shutdown feature?
Yes, it has an active-high shutdown pin for power saving and external control.
- What is the bandwidth of the ACPL-C87BT-500E?
The bandwidth is up to 100 kHz.
- What are the safety certifications for the ACPL-C87BT-500E?
It is certified to UL 1577 and IEC/EN/DIN EN 60747-5-5.
- What are the typical applications of the ACPL-C87BT-500E?
Typical applications include automotive BMS, DC/DC and AC/DC converters, motor inverter DC bus voltage sensing, and general-purpose voltage sensing.
- How does the ACPL-C87BT-500E achieve high common-mode transient immunity?
It achieves high common-mode transient immunity of 15 kV/µs through its advanced optical coupling technology.
- What is the package type of the ACPL-C87BT-500E?
The component is packaged in a Stretched SO-8 (SSO-8) package.
