Технические характеристики
HCPL-7840-000E is a Broadcom high-precision optical isolation amplifier adopting Sigma-Delta conversion and full differential circuit architecture, specially designed for accurate isolated current and voltage sampling in high-noise industrial inverter, motor drive and switching power supply systems.
👉 It’s not a general low-precision optocoupler or non-isolated operational amplifier.
👉 It’s a high CMTI isolated analog sensing chip with ultra-low nonlinearity, solving high dv/dt common-mode interference from IGBT/MOSFET switching power circuits.
Key Features of HCPL-7840-000E Isolation Amplifier
Power electronics and motion control engineers select HCPL-7840-000E for superior noise suppression, precise sampling and global safety certification:
- 3750 Vrms reinforced galvanic isolation (UL1577 certified), fully separating high-voltage power side and low-voltage control logic circuits
- Industry-leading 15 kV/μs common-mode transient immunity (CMTI) at VCM=1000V, eliminates sampling jitter caused by high-speed power switching
- Ultra-high linearity: only 0.004% typical nonlinearity, ±5% fixed gain tolerance for consistent closed-loop control accuracy
- Ultra-low 0.3 mV input offset voltage, extremely low gain temperature drift of 0.00025 V/V/°C, stable sampling under wide temperature fluctuation
- 100 kHz signal bandwidth, supports fast real-time current closed-loop feedback for high-frequency PWM drive equipment
- Advanced Σ-Δ analog-to-digital conversion + chopper-stabilized amplifier, suppresses temperature drift and low-frequency noise
- Full differential input and differential output topology, further improves interference rejection capability
- 8-pin through-hole PDIP package, tube packaging format (suffix -000E stands for lead-free DIP tube version)
- Dual independent 5V power rails for primary and secondary sides, isolated power domain design
- Wide industrial operating temperature range: -40°C to +85°C with full performance guarantee
- Passed UL, CSA, IEC/EN 60747-5-5 international safety isolation certifications
- RoHS3 lead-free compliant construction, compatible with standard wave soldering assembly processes
- Compact size, fewer peripheral components, cost and space saving compared with traditional current transformers and Hall sensors
- Stable long-lifecycle mass supply for industrial automation, new energy power conversion and motor control equipment
Типичные применения
Three-phase AC servo & BLDC motor drive phase current and DC bus current sampling
Industrial frequency converter, inverter and welding power supply isolated signal detection
Solar string inverter, energy storage converter charge/discharge current monitoring
High-power switching power supply (SMPS) output current & voltage isolation feedback
Uninterruptible power supply (UPS) and communication power module analog signal isolation
Automated factory PLC high-voltage loop current detection and overcurrent protection circuits
Rail transit traction auxiliary power unit signal sampling equipment
Medical high-power medical power supply isolated current monitoring systems
General industrial analog signal isolation and high-precision shunt current sensing
LXB Semicon supplies original HCPL-7840-000E isolation amplifier optocoupler IC
