Broadcom ACPL-C72x Precision Miniature Isolation Amplifiers
Broadcom ACPL-C72x Precision Miniature Isolation Amplifiers include the ACPL-C72B, ACPL-C72A, and ACPL-C720 series. The isolation amplifiers are intended for current sensing in electronic power converters, including motor drives and renewable energy systems.The ACPL-C72x is optimized to allow a ±50mV input voltage range reducing power loss on the shunt resistor. The ACPL-C72A (±1% gain tolerance) and the ACPL-C720 (±3% gain tolerance) are recommended for general applications. The ACPL-C72B (±0.5% gain tolerance) can be implemented for high-precision applications. The amps utilize a single 5V supply and deliver excellent linearity and dynamic performance of 65dB SNR.
The Broadcom ACPL-C72x has high common-mode transient immunity (25kV/μs) that supplies the precision and stability required to accurately monitor motor current in high-noise motor control environments, resulting in smoother control (less “torque ripple”) in various types of motor control applications.
Combined with superior optical coupling technology, the ACPL-C72x employs a sigma-delta (Σ-Δ) analog-to-digital converter, chopper-stabilized amplifiers, and a fully differential circuit topology to provide unequaled isolation mode noise rejection, low offset, high gain accuracy, and stability.
The device is available in a compact, auto-insertable stretched SO-8 (SSO-8) package that satisfies worldwide regulatory safety standards.
FEATURES
- Superior optical isolation technology
- ±50mV linear input range
- ±80mV full-scale input range
- 35V/V gain
- ±0.5%, ±1%, ±3% gain accuracy
- ‑86ppm/°C low gain drift
- ±0.5mV maximum input offset voltage
- TCVos 0.6µV/°C typ; 2.4µV/°C maximum
- 0.03% non‑linearity
- 200kHz bandwidth
- 65dB typical SNR
- 3V to 5.5V wide power supply range
- -40°C to +110°C operating temperature range
- 15kV/μs CMTI
- 8mm creepage and clearance
- Reinforced insulation with worldwide safety approvals:
- IEC/EN 60747‑5‑5: VIORM = 1414Vpk
- UL 1577: 5000Vrms/1min
- CSA
APPLICATIONS
- Motor phase and rail current sensing
- Servo drives and motors
- Power inverter current sensing
- Industrial process control
- Data acquisition systems
- General purpose current sensing
- Traditional current transducer replacements