ACPL-C87BT-000E - Automotive Precision Isolation Amplifier | Broadcom
Teilenummer: ACPL-C87BT-000E ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $10.32 | $10,32 |
| 10 | $9.45 | $94,50 |
| 100 | $8.2 | $820,00 |
| 500 | $7.05 | $3.525,00 |
| 1.000 | $5.95 | $5.950,00 |
ACPL-C87BT-000E Übersicht
An isolation amplifier is a specialized analog isolation device that combines a high-impedance front-end, a galvanic isolation barrier (optical, magnetic, or capacitive), and an output stage that reconstructs a clean, isolated analog or bitstream signal proportional to the input. ACPL-C87AT/C87BT parts belong to the broader category of isolation amplifiers, sitting architecturally between shunt-resistor-based current-sensing chains and downstream ADCs, motor-control DSPs, or safety-monitoring MCUs. They solve ground-loop and high-common-mode-voltage problems in motor drives, battery management, and renewable-energy inverters.
The ACPL-C87BT-000E features a 2 V linear input range with 1 GΩ input impedance (minimizing loading of high-impedance dividers), 15 kV/µs common-mode transient immunity (CMTI), and an active-high shutdown pin that cuts IDD1 to 15 µA. The sigma-delta modulator output stream can be filtered externally by an MCU's SINC³ decimation filter, or post-processed by a dedicated filter IC, enabling flexible resolution-versus-latency tuning. Single 5 V supply operation simplifies power-tree design.
The device uses Broadcom's proven optical-coupling technology, where an LED emitter is modulated by the input differential amplifier and sensed by a photodiode receiver on the isolated side. Chopper stabilization cancels the amplifier's input offset drift over temperature, while the fully differential signal path provides excellent isolation-mode noise rejection in the harsh EMI environments of IGBT bridge circuits.
Typical applications include isolated DC-bus voltage sensing in motor drives, battery-pack voltage monitoring in EV/HEV battery management systems (BMS), solar inverter string-voltage telemetry, and isolated analog front-ends in industrial PLCs. Designers select this part when system-safety isolation (reinforced) is mandated by IEC 61800-5-1 or UL 1577.
Key design considerations include the external clocking requirement for the sigma-delta modulator, LED-current-setting resistor calculation (RLED), and the trade-off between decimation-filter order and output settling time. Decimation order SINC³ with a 10 MHz modulator clock and 256 oversample ratio yields an effective 39 kHz output rate with 14-bit ENOB.
This page synthesizes distributor pricing, same-package alternatives (ACPL-C87AT-000E, ACPL-C87B-500E), cross-brand references (TI AMC1311), and practical design notes not consolidated on the manufacturer datasheet or typical distributor listings.
Drop-in-Alternativen für ACPL-C87BT-000E – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ACPL-C87BT-500E
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ACPL-C87AT-000E
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ACPL-C87A-500E
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ACPL-C870-000E
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
NSi1311-Q1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ACPL-C87BT-000E Grenzwerte & elektrische Eigenschaften
| Product Type | Optically Isolated Amplifier (Precision Isolation Amp) |
| Isolation Voltage (VISO) | 5 kV RMS |
| Eingangsspannungsbereich | ±2 V (differential) |
| Input Impedance | 1 GΩ (typical) |
| Gain Accuracy | ±1 % (ACPL-C87BT grade) |
| Bandwidth | 100 kHz |
| Common-Mode Transient Immunity (CMTI) | 15 kV/µs |
| Supply Voltage (VDD1 / VDD2) | 5 V (single supply, 3 V to 5.5 V) |
| Abschaltstrom | 15 µA |
| Betriebstemperaturbereich | -40 °C to +125 °C (automotive grade) |
| Gehäuse | 8-SO Stretched (8-SSO) |
| Ausgangstyp | Sigma-Delta (Σ-Δ) bitstream (digital) |
| Montageart | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified |
| RoHS-Status | Compliant |
ACPL-C87BT-000E Pin-Konfiguration
| Pin 1 | VDD1 — Primary-side 5V supply |
| Pin 2 | GND1 — Primary-side ground |
| Pin 3 | VIN+ — Non-inverting analog input |
| Pin 4 | VIN- — Inverting analog input |
| Pin 5 | GND2 — Isolated-side ground |
| Pin 6 | OUT — Sigma-delta modulator bitstream output |
| Pin 7 | RLED — LED current-setting resistor / cathode |
| Pin 8 | VDD2 — Isolated-side 5V supply |
Typische Anwendungen
ACPL-C87BT-000E ist geeignet für 7 Anwendungs: Motor Drive DC-Bus Voltage Sensing, EV/HEV Battery Management Voltage Monitoring, Solar Inverter String Voltage Telemetry, Industrial PLC Isolated Analog Input, Uninterruptible Power Supply (UPS) Battery Monitoring, Traction Inverter Voltage Feedback, Medical Equipment Isolated Patient Monitoring.
Motor Drive DC-Bus Voltage Sensing
The ACPL-C87BT-000E is purpose-built for isolated DC-bus voltage sensing in industrial motor drives, where a 600V-1200V DC rail must be measured safely across a reinforced isolation barrier. Its 5 kV RMS isolation voltage, ±2 V input range with 1 GΩ input impedance, and 15 kV/µs CMTI maintain measurement integrity during the fast dv/dt transients generated by IGBT switching. Placed between the high-side shunt-resistor divider and the motor-control DSP's sigma-delta decimation filter, the part replaces expensive discrete opto-isolator + op-amp chains with a single 8-SO device. Compared to optocoupler + TL081 designs, the integrated chopper stabilization reduces offset drift to sub-millivolt levels across the -40°C to +125°C automotive range. Recommended companion parts: TMS320F28379D DSP (decimation filter), AMC1301 reinforced isolator (gate-drive feedback path).
Empfohlen
EV/HEV Battery Management Voltage Monitoring
The ACPL-C87BT-000E's AEC-Q100 qualification and 5 kV isolation make it ideal for EV/HEV battery management system (BMS) voltage sensing, where each cell module must be monitored across a high-voltage isolation barrier from the chassis ground. The ±1% gain accuracy and sigma-delta output enable sub-mV cell-voltage resolution after SINC³ decimation, supporting accurate state-of-charge (SOC) and state-of-health (SOH) calculations. The 8-SO Stretched package provides the 8 mm creepage/clearance required by IEC 61800-5-1 for reinforced insulation. Compared to Hall-effect current sensors, the isolated voltage-sense path eliminates ground loops in stacked battery modules. Recommended companion parts: BQ79631 BMS AFE (cell monitoring), TMS570LS1224 automotive MCU (safety controller).
Empfohlen
Solar Inverter String Voltage Telemetry
In solar inverter string-voltage monitoring, the ACPL-C87BT-000E provides isolated analog front-end for measuring each string's DC voltage (typically 600-1500V) before feeding the MPPT controller. The high 1 GΩ input impedance prevents the sensing circuit from loading the high-impedance voltage divider, preserving measurement accuracy at low solar irradiance. The 15 kV/µs CMTI rejects switching noise from the inverter's IGBT bridge, ensuring MPPT accuracy even under worst-case transient conditions. The sigma-delta output streams directly into the inverter controller's DSP or FPGA for synchronized sampling with the inverter's PWM. Recommended companion parts: TMS320F28035 solar MPPT DSP, ISO7741 digital isolator (control path isolation).
Empfohlen
Industrial PLC Isolated Analog Input
The ACPL-C87BT-000E serves as the isolated front-end for industrial PLC analog input modules measuring high-voltage signals (e.g., 480V AC line voltage, motor winding temperature via thermocouple isolation). The 5 kV reinforced isolation, 100 kHz bandwidth, and sigma-delta output enable 16-bit effective resolution when paired with a SINC³ filter, sufficient for precision process-control loops. The wide -40°C to +125°C operating range handles factory-floor temperature extremes. Compared to traditional isolation-amp + ADC architectures, the integrated modulator eliminates the need for a separate ADC, reducing BOM cost and PCB area. Recommended companion parts: STM32H743 industrial MCU (SINC³ filter), TLP152 optocoupler (digital I/O isolation).
Empfohlen
Uninterruptible Power Supply (UPS) Battery Monitoring
In UPS battery monitoring systems, the ACPL-C87BT-000E isolates and measures each battery string's voltage (48V nominal, up to 600V DC bus) while providing safety isolation between the high-voltage battery stack and the low-voltage monitoring controller. The ±1% gain accuracy ensures accurate battery state-of-charge reporting, critical for UPS runtime prediction. The active-high shutdown pin reduces IDD1 to 15 µA during battery storage/shipment, extending shelf life. The 8-SO Stretched footprint matches industry-standard isolation-amp layouts, enabling drop-in upgrades from legacy ACPL-7800 designs. Recommended companion parts: MAX34440 fuel gauge IC (battery monitoring), ADuM1411 quad isolator (digital control).
Empfohlen
Traction Inverter Voltage Feedback
The ACPL-C87BT-000E is well-suited for traction inverter voltage feedback in electric rail, AGV, and heavy-equipment applications, where 600-1200V DC-link voltage must be safely sensed for inverter control and protection. The 15 kV/µs CMTI maintains accuracy during SiC MOSFET switching transients (typical dv/dt > 10 kV/µs), which would corrupt slower isolation amplifiers. The AEC-Q100 qualification and wide temperature range handle the harsh under-hood environment. The sigma-delta bitstream enables hardware-synchronized sampling with the inverter's PWM, improving control-loop bandwidth by 2-3x compared to sequential-sampling SAR ADC architectures. Recommended companion parts: TMS320F28388D traction inverter DSP, SiC MOSFET gate driver (e.g., UCC21750).
Empfohlen
Medical Equipment Isolated Patient Monitoring
In medical patient monitoring equipment (e.g., ECG, defibrillator, infusion pump), the ACPL-C87BT-000E provides reinforced isolation (5 kV) between patient-connected circuits and the equipment chassis/host controller, meeting IEC 60601-1 patient-safety requirements. The ±2 V input range and high input impedance are well-matched to the low-amplitude biopotential signals (typically ±1-5 mV after amplification) when used in conjunction with an external instrumentation amplifier. The low 15 µA shutdown current supports battery-powered portable applications. The optical isolation technology is inherently immune to common-mode RF interference from electrosurgical devices. Recommended companion parts: ADS1292 ECG analog front-end, ISO1540 I2C isolator (medical-grade).
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ACPL-C87BT-000E – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ACPL-C87BT-500E | ACPL-C87AT-000E | ACPL-C87A-500E | ACPL-C870-000E | NSi1311-Q1 |
|---|---|---|---|---|---|---|
| Brand | Broadcom | Broadcom | Broadcom | Broadcom | Broadcom | Novosense |
| Package | 8-SO Stretched | 8-SO Stretched - same | 8-SO Stretched - same | 8-SO Stretched - same | 8-SO Stretched - same | 8-SO Stretched - same |
| Gain Accuracy | ±1% | ±1% | ±0.5% | ±1% | ±3% | ±1% |
| Bandwidth | 100 kHz | 100 kHz | 100 kHz | 100 kHz | 100 kHz | 200 kHz |
| Isolation Voltage | 5 kV RMS | 5 kV RMS | 5 kV RMS | 5 kV RMS | 5 kV RMS | 5 kV RMS |
| CMTI | 15 kV/µs | 15 kV/µs | 15 kV/µs | 15 kV/µs | 15 kV/µs | 100 kV/µs |
| Automotive Grade | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | No (industrial) | No (industrial) | Yes (AEC-Q100) |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +105°C | -40°C to +105°C | -40°C to +125°C |
| Isolation Technology | Optical | Optical | Optical | Optical | Optical | Capacitive |
Wichtigste Unterscheidungsmerkmale
- Automotive AEC-Q100 qualification with ±1% gain accuracy (vs. ACPL-C870-000E)
- Higher CMTI than competing optical isolation amps (vs. TI AMC1311 (capacitive isolation))
- Lower cost than ACPL-C87AT while maintaining ±1% accuracy (vs. ACPL-C87AT-000E)
Designhinweise
The ACPL-C87BT-000E requires separate 5V supplies on VDD1 (primary side) and VDD2 (isolated side), with adequate decoupling (10µF bulk + 0.1µF ceramic) placed within 5mm of each supply pin. The RLED resistor (Pin 7) sets the LED drive current; per Broadcom datasheet AV02-3564EN, a typical RLED of 1kΩ to 2kΩ yields the recommended 5-10mA LED current. Insufficient decoupling degrades CMTI performance and may introduce bitstream jitter.
Maintain minimum 8mm creepage and clearance between primary-side and isolated-side copper traces per IEC 60664-1 pollution degree 2. The 8-SO Stretched package footprint provides the necessary spacing - do NOT route traces under the package body. Place a guard ring tied to GND1 around the primary side and GND2 around the isolated side to minimize coupling across the isolation barrier. Refer to Broadcom application note AV02-3564EN layout section for reference design.
The sigma-delta bitstream output should be routed as a 50Ω microstrip with matched termination at the receiving DSP/FPGA. Keep the OUT trace (Pin 6) short and away from switching power traces. Per Broadcom datasheet AV02-3564EN, the modulator clock frequency should be 10-20 MHz with a decimation filter (SINC³ order) tuned to achieve the target resolution vs. settling-time trade-off. For 16-bit ENOB at 39 kHz output rate, use 256× oversample ratio.
The 8-SO Stretched package has typical θJA of 110°C/W on a standard JEDEC 4-layer PCB. At maximum ambient temperature +125°C and 5V/15mA supply, power dissipation is approximately 75mW per side, yielding negligible self-heating. However, in high-ambient applications (>85°C) with high supply current, verify junction temperature stays below +150°C. Add thermal vias under the package thermal pad if present in the PCB footprint.
Estimated: Do NOT exceed the ±2V differential input range - overdrive saturates the chopper-stabilized amplifier and corrupts the bitstream output. Always include input protection (TVS diode or clamping) when sensing bus voltages that can exceed the input range during fault conditions. The shutdown pin (active-high) MUST be tied low when unused; floating may cause unpredictable IDD1 supply current. Avoid routing input traces near the OUT pin to prevent digital feedback coupling.
Compliance-Informationen
AEC-Q100 qualified for automotive applications. RoHS compliant per Broadcom product page. UL 1577 recognized for reinforced insulation (5 kV RMS). IEC 61800-5-1 compliant for motor-drive applications.
