LM211DG - 200 ns Single Comparator | onsemi | SOIC-8
N.º da peça: LM211DG ✓ AtivoLM211DG Visão geral
A voltage comparator is an analog integrated circuit that compares two input voltages and changes its output state when one input crosses the other. The LM211 belongs to the broader comparator, analog IC, and semiconductor hierarchy. Its open-collector output can interface with TTL, MOS, DTL, and RTL logic, while its ability to accept split supplies makes it useful in systems that do not share a common signal ground.
Key features include one comparator channel, a 200 ns response time, and operation across a 5 V to 30 V single-supply range. The open-collector output provides a flexible way to drive compatible digital logic, lamps, or relays when an appropriate pull-up arrangement is used. The specified operating temperature range for LM211DG is -25°C to 85°C.
The LM211 architecture is designed for high-speed threshold detection rather than precision amplification. Its input stage can operate independently of system ground, which helps when comparing signals referenced to a different potential. The open-collector output remains in a high-impedance state unless pulled down, allowing the output transition speed to depend partly on the external pull-up resistor and associated capacitance.
Typical applications include industrial control interfaces, pulse-width and timing circuits, sensor threshold detection, relay or lamp drive, level translation between analog and digital systems, and general-purpose logic interfacing. The combination of a 200 ns response time and flexible supply options also suits pulse-width measurement and fast event detection circuits.
When designing around the LM211DG, account for the open-collector output when calculating rise time and fanout. Keep input and output paths short, use a pull-up resistor appropriate for the driven logic family, and check input common-mode limits for the selected supply configuration before finalizing the schematic.
This product summary combines the LM211DG electrical envelope, package information, sourcing context, pin-compatible alternatives, and practical interface guidance. It supports faster component selection by separating core operating characteristics from application-specific design considerations.
Alternativas drop-in para LM211DG — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com LM211DG (mesmo formato e footprint) — diferindo em Number of Channels, Operating Temperature Range, Package.
LM211DG4
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM211DRE4
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM311DG
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
BTS3110NHUMA1
✅ Drop-InConsulte o preço
Ver ficha técnica →TS311A
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LM211DG Classificações máximas e características elétricas
| Comparator Type | Single high-speed voltage comparator |
| Number of Channels | 1 channel |
| Response Time | 200 ns |
| Single-Supply Operating Voltage | 5 V to 30 V |
| Split-Supply Operation | ±15 V |
| Tipo de saída | Open-collector |
| Logic Compatibility | DTL, MOS, RTL, and TTL |
| Input Isolation | Inputs can be isolated from system ground |
| Faixa de temperatura de operação | -25°C to 85°C |
| Maximum Supply Voltage | 36 VDC |
| Encapsulamento | 8-pin SOIC |
| Package Width | 3.90 mm |
| Package Body Length | 0.154 inch |
| Contagem de pinos | 8 pins |
| Output Drive Capability | Capable of driving lamps or relays |
| Datasheet File Size | 121 KB |
| Datasheet Length | 10 pages |
Guia de Configuração de Pinos do LM211DG 0.154 inch
Configuração de pinos para LM211DG (pacote 0.154 inch). 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 LM211DG.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
LM211DG é adequado para 6 aplicaçãos: Industrial Threshold Detection, Pulse-Width and Timing Control, TTL and MOS Logic Interfacing, Relay and Lamp Drive Interface, Sensor Signal Conditioning, Power Supply and Regulation Monitoring.
Industrial Threshold Detection
The onsemi LM211DG fits industrial threshold-detection circuits because it combines a 200 ns response time with operation from 5 V to 30 V. Place the comparator across a sensor or divided reference signal so the output changes state when the two inputs cross. The open-collector output can feed a pull-up and a controller input, while the -25°C to 85°C specified range covers many industrial environments. Verify the sensor's voltage range, common-mode limits, noise immunity, and galvanic-isolation requirements before finalizing the interface.
Recomendado
Pulse-Width and Timing Control
The LM211DG is appropriate for pulse-width, zero-cross, and event-timing measurements because its documented response time is 200 ns. Use one input for the incoming pulse and the other for a threshold reference, then use the open-collector output to drive a counter or capture input through an external pull-up. Account for pull-up resistance and wiring capacitance when estimating the output rise time, because the 200 ns comparator response does not include all externally generated propagation delay.
Recomendado
TTL and MOS Logic Interfacing
Use the LM211DG when an analog signal must be converted into a logic-compatible transition. Its open-collector output supports DTL, MOS, RTL, and TTL interfacing, allowing the comparator to sink current while an external pull-up establishes the high state. This arrangement is useful for open-collector bus signaling and for isolating the logic pull-up voltage from the comparator supply when required. Select the pull-up resistor to balance fanout against rise time and confirm the output's absolute voltage and current limits.
Recomendado
Relay and Lamp Drive Interface
The LM211DG can support relay and lamp drive applications because the manufacturer identifies these loads as compatible with the device's open-collector output. For a lamp, determine whether the output path and pull-up network can handle its operating current and provide appropriate protection. For a relay, use a suitable driver stage when coil current exceeds the comparator's direct load capability, and include a flyback path across the coil. The selected driver must preserve the polarity and timing behavior required by the control system.
Recomendado
Sensor Signal Conditioning
The LM211DG can convert a sensor-derived analog level into a clean binary decision. Place the sensor output on one input and a selectable reference on the other, then route the open-collector result into a pull-up and downstream digital stage. The 5 V to 30 V supply range provides flexibility for industrial and embedded systems, while isolated input operation can help when the sensed voltage is referenced away from system ground. Validate common-mode range, input offset, noise, and switching behavior against the actual sensor and operating conditions.
Recomendado
Power Supply and Regulation Monitoring
Use the LM211DG to monitor a power rail or divided auxiliary supply and generate an alert when the measured level crosses a reference. Its 200 ns response permits rapid detection of transients, while the 5 V to 30 V single-supply range can cover many industrial control rails. The open-collector output can trigger an alarm, disable another circuit, or feed a supervisor through a pull-up. Check input common-mode limits, output leakage, and system-level filtering to prevent false events.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LM211DG — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LM211DG4 | LM211DRE4 | LM311DG | TS311 | TS311A |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | STMicroelectronics | STMicroelectronics |
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Comparator Type | Single high-speed voltage comparator | Single comparator | Single comparator | Single comparator | Single comparator | Single comparator |
Principais diferenciais
- Documented high-speed response (vs LM311DG)
- Wide single-supply operating range (vs TS311)
- Direct interface with multiple logic families (vs TS311A)
- Input-ground isolation capability (vs LM211DG4)
Notas de projeto
Do not treat the 200 ns comparator response time as the complete output transition time. The open-collector output rises through an external pull-up resistor, so the observed edge also depends on pull-up resistance, input capacitance, wiring, and the load's threshold. Use the pull-up value required by the driven logic interface and confirm that the resulting rise time satisfies the receiving circuit.
Respect the listed 36 VDC maximum supply voltage, including supply tolerance, startup overshoot, and transient margin. The 5 V to 30 V operating interval applies to single-supply operation, while ±15 V is a supported split-supply arrangement. Confirm the absolute voltage presented to every supply pin under fault conditions and ensure the input common-mode range remains valid at the minimum supply voltage.
Keep the comparator inputs short and route them away from high-current switching paths to reduce coupled noise and false threshold transitions. Place the output pull-up close to the driven input when practical, and keep the return path continuous. When the inputs are isolated from system ground, define the input return carefully to prevent parasitic ground loops and unintended coupling between the comparator and driven circuit.
Use a relay driver or suitable switching stage when coil or lamp current exceeds the comparator's permitted output load. The LM211 can support lamp and relay interfacing, but the open-collector pin still has finite sink-current and voltage limits. Add the required flyback protection for an inductive coil and verify every load against the exact manufacturer limits before energizing it.
Informações de conformidade
No definitive RoHS, REACH, lead-free, halogen-free, or conflict-minerals status appears in the cited manufacturer or distributor records. AEC-Q100 qualification is not indicated.