TLP7820(D4-LF4 - 5kVrms Isolated Amplifier | Toshiba
N.º da peça: TLP7820(D4-LF4 ✓ AtivoTLP7820(D4-LF4 Visão geral
An isolation amplifier is a signal-conditioning IC that transfers information across an electrically isolated barrier while preventing galvanic current flow between its input and output domains. The TLP7820 belongs to the isolated delta-sigma modulator class, combining an analog signal interface, optical isolation, and digital filtering into a device intended to simplify current-sense measurement systems. Its isolation amplifier hierarchy is isolation amplifier to optically isolated amplifier to signal-chain IC and industrial power-management component.
Key verified features include 5000 Vrms isolation, operation from 3 V to 5.5 V, differential analog output, one isolation channel, and an SO8L (LF4) package. The D4 option is associated with EN IEC 60747-5-5 qualification according to the manufacturer document index supplied with the product data. These characteristics make the device applicable where a high-side shunt voltage must be measured without connecting the measurement ground to the inverter or motor power stage.
The TLP7820 uses optical isolation to establish a safety barrier between the sensed voltage and the system-side output. Toshiba identifies the TLP7820 family as an isolation amplifier and isolated delta-sigma modulator product with analog output. Its differential output supports direct connection to measurement circuitry when implemented according to the manufacturer application guidance, while the isolated structure helps suppress common-mode effects associated with high-power switching environments.
Typical applications include three-phase inverter motor control, motor phase-current measurement, industrial power conversion, power-supply monitoring, and isolated voltage sensing. These systems benefit from the 5000 Vrms isolation barrier when the measured shunt sits at a high common-mode voltage or when safety isolation is required between power electronics and supervisory control circuitry.
Designers should preserve the isolation barrier, use the specified input and output components from the manufacturer datasheet, and provide adequate clearance and creepage around the package. Input filtering, output differential routing, grounding, and PCB contamination control are as important as electrical pin compatibility because they determine measurement accuracy and real-world isolation performance.
This page consolidates verified manufacturer and distributor information for the TLP7820(D4-LF4, including supply range, isolation rating, package information, sourcing data, and documented same-brand alternatives. It also provides application guidance, comparison tables, and design notes intended to help engineers evaluate the device beyond basic distributor specifications.
Alternativas drop-in para TLP7820(D4-LF4 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
TLP7820(D4ALF4,E
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TLP7820(D4,E
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TLP7820(B,E
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TLP7820(A-LF4,E
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TLP7820(A,E
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TLP7820(D4-LF4 Classificações máximas e características elétricas
| Product Type | Optically isolated amplifier / isolated delta-sigma modulator |
| Number of Channels | 1 channel |
| Isolation Voltage | 5000 Vrms |
| Supply Voltage Range | 3 V to 5.5 V |
| Tipo de saída | Analog output |
| Input Type | Differential |
| Modulation Type | Delta-sigma modulation |
| Encapsulamento | SO8L (LF4) |
| Package Category | 8-SO / SOIC-8, 7.50 mm width |
| Tipo de montagem | Surface mount |
| Primary Application | Motor phase current and voltage sensing |
| Qualification Option | D4 option of EN IEC 60747-5-5 |
| Status RoHS | RoHS |
| VDE Status | VDE |
| Número de pinos | 8 pins |
Guia de Configuração de Pinos do TLP7820(D4-LF4 8-so / soic-8, 7.50 mm width
Configuração de pinos para TLP7820(D4-LF4 (pacote 8-so / soic-8, 7.50 mm width). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para TLP7820(D4-LF4.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
TLP7820(D4-LF4 é adequado para 6 aplicaçãos: Three-Phase Inverter Motor Control, Motor Phase-Current Measurement, Inverter Voltage Sensing, Industrial Power-Supply Monitoring, Isolated Voltage Feedback in Power Conversion, Isolated Data Acquisition.
Three-Phase Inverter Motor Control
TLP7820(D4-LF4 fits three-phase inverter motor control because it combines differential analog measurement with 5000 Vrms optically isolated reinforcement in an 8-SO package. It can be placed in a shunt-based phase-current measurement path while preserving a galvanic barrier between the switching power stage and the controller. The verified 3 V to 5.5 V operating range supports low-voltage control systems. Before implementation, engineers must confirm the manufacturer-specified shunt range, input impedance, gain, bandwidth, and output transfer curve to ensure the PWM-related signal components are captured without compromising measurement accuracy.
Recomendado
Motor Phase-Current Measurement
The TLP7820(D4-LF4 is intended for motor phase-current sensing and can isolate a differential shunt voltage from the controller domain. Its 5000 Vrms isolation rating provides a substantial barrier where the measured conductor may be elevated far above the control-system ground. The differential analog output supports downstream conditioning or direct acquisition, while the delta-sigma modulator architecture suits precision measurement. Designers should verify the datasheet gain, offset, bandwidth, common-mode range, and output-noise values against the shunt and switching frequency before finalizing the analog front end.
Recomendado
Inverter Voltage Sensing
TLP7820(D4-LF4 supports inverter voltage-sensing designs where a control circuit must evaluate a signal referenced to a noisy or hazardous power domain. The 5000 Vrms optical isolation barrier separates the sensed input from the system-side analog output, while differential operation can improve rejection of unwanted common-mode voltage. Its 3 V to 5.5 V supply compatibility simplifies integration with low-voltage logic rails. Exact input and output voltage limits are not present in the supplied data, so the manufacturer datasheet must be checked to confirm signal range, scaling, saturation behavior, and safe operating limits.
Recomendado
Industrial Power-Supply Monitoring
The TLP7820(D4-LF4 can be used in industrial power-supply monitoring systems that require an isolated measurement interface between a high-voltage power rail and supervisory electronics. Its optically isolated delta-sigma modulation architecture transfers the sensed signal across the barrier and provides an analog output for the controller. The verified 5000 Vrms isolation, single-channel differential input, and 3 V to 5.5 V supply range support compact isolated sensing. Engineers should compare the complete datasheet electrical limits, including gain, bandwidth, offset, and power consumption, because those values were not available in the supplied distributor summaries.
Recomendado
Isolated Voltage Feedback in Power Conversion
TLP7820(D4-LF4 is appropriate for isolated voltage-feedback paths in power converters where the feedback divider is referenced to a switching node or transformer output. The optical isolation barrier allows a differential measurement to reach system-side electronics without a direct ground connection across the isolation region. Its analog output is compatible with conventional control-loop acquisition, while the 5000 Vrms rating addresses demanding high-side measurement applications. Layout should preserve the isolation clearance and avoid placing copper or contamination across the barrier. The exact allowable input span and feedback transfer must be verified from the manufacturer document.
Recomendado
Isolated Data Acquisition
TLP7820(D4-LF4 can form the isolation stage of an industrial data-acquisition channel when a voltage signal must be transferred from a high-potential sensor or shunt to a safer controller region. The device uses optical isolation and delta-sigma modulation to provide an analog measurement output, while its 5000 Vrms rating supports reinforced isolation applications. The 3 V to 5.5 V operating range allows use with conventional embedded-system supply rails. Designers should evaluate the documented input bandwidth, gain error, offset, common-mode rejection, and output settling behavior, none of which were available in the supplied verified snippets.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TLP7820(D4-LF4 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TLP7820(D4ALF4,E | TLP7820(D4,E | TLP7820(B,E | TLP7820(A-LF4,E | TLP7820(A,E |
|---|---|---|---|---|---|---|
| Brand | Toshiba | Toshiba | Toshiba | Toshiba | Toshiba | Toshiba |
| Package | SO8L (LF4) | SO8L (LF4) | SO8L (LF4) | SO8L (LF4) | SO8L (LF4) | SO8L (LF4) |
| Product Type | Optically isolated amplifier / isolated delta-sigma modulator | Optically isolated amplifier | Optically isolated amplifier | Optically isolated amplifier | Optically isolated amplifier | Optically isolated amplifier |
| Number of Channels | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel |
Principais diferenciais
- Verified D4 qualification option (vs TLP7820(A-LF4,E)
- Directly identified motor phase-current sensing role (vs TLP7830(D4-TP4,E)
- Consistent isolated sensing architecture (vs TLP7820(D4ALF4,E)
Notas de projeto
Maintain a continuous isolation barrier across the TLP7820(D4-LF4 package. Do not place system-side copper, test pads, ground fill, or mechanical hardware that bridges the input and output domains. Route the isolated-side return independently and confirm the required clearance and creepage distances from the manufacturer datasheet and applicable insulation standard.
Do not treat the shared 8-SO package or matching 5000 Vrms headline rating as sufficient proof that every TLP7820 ordering suffix is interchangeable. Confirm the pin diagram, lead dimensions, input polarity, gain, bandwidth, output range, qualification option, and suffix conventions against the official manufacturer documentation before approving a substitution.
Keep the isolation-amplifier input traces short and away from switching-node copper. Differential input routing should use a geometry consistent with the manufacturer's reference layout, with care taken not to introduce unequal parasitics. Place required input and output components directly at the associated pins, and follow the datasheet's grounding and bypass recommendations to minimize measurement error.
The verified summaries do not provide gain, input range, bandwidth, offset, or settling time. These omissions prevent a complete signal-chain design based only on the 3 V to 5.5 V supply and 5000 Vrms isolation specifications. Verify all timing and accuracy limits against the manufacturer datasheet before selecting input filters, shunt values, or controller sampling rates.
Informações de conformidade
RoHS and VDE are stated in the verified distributor results. The manufacturer document index identifies the D4 option with qualification according to option D4 of EN IEC 60747-5-5. No verified AEC-Q100, REACH, lead-free, halogen-free, or conflict-minerals declaration was supplied.
