AD9686TQ - 7ns Single Comparator, 35mA | Analog Devices
N.º de pieza: AD9686TQ ✗ Fin de vidaAD9686TQ Descripción general
A comparator is an integrated circuit that compares two input voltages and produces a digital output indicating which input is higher. In the signal-chain hierarchy, the AD9686TQ belongs to the comparator family within analog and linear integrated circuits, where it serves as the decision element between an analog sensing node and a downstream digital or control system. Unlike an operational amplifier used mainly for closed-loop amplification, the comparator provides fast open-loop logic behavior with no intentional feedback compensation.
The principal performance characteristics of the AD9686TQ include a 7 ns propagation delay, 2 mV offset voltage, 4 uA input bias current, and 35 mA operating supply current. Its 16-pin ceramic package supports operation from -55°C to +125°C, while the latch-function TTL-compatible output supports direct interfacing with digital control logic. The 35 mA supply requirement is consistent with a high-speed bipolar comparator and should be included in system power-budget calculations.
The device uses bipolar input and output circuitry optimized for rapid decision transitions. Its low input bias current reduces loading on high-impedance sources, while the 2 mV offset specification defines the input range in which the output state is not guaranteed near the comparison threshold. Designers should add adequate hysteresis when the compared signals can cross slowly or when noise near the threshold could cause repeated output toggling. The latch function can hold the comparator state for system timing and event-capture applications.
Typical uses include pulse-width detection, zero-cross detection, window comparison, automatic-range measurement, and high-speed threshold supervision. In instrumentation, the AD9686TQ can compare a sensor-derived voltage against a reference level and generate a control signal for an ADC, counter, or data-acquisition subsystem. In industrial control equipment, the extended temperature range supports equipment operating in hot or cold environments where commercial-temperature plastic packages would be insufficient.
The principal design consideration is that the 7 ns delay is very short compared with the input offset voltage of 2 mV. A system requiring deterministic decisions close to the threshold should therefore combine appropriate input conditioning, positive feedback for hysteresis, and careful routing to minimize noise pickup. Check the manufacturer pin-description table before assigning board traces, and confirm the supply-voltage limits and output-state definitions in the manufacturer datasheet.
This page organizes the AD9686TQ specifications, package information, sourcing pathway, and application guidance in one place. It also documents the limitations of the available cross-reference record, compares the verified operating characteristics, and identifies practical selection questions that are important before the ceramic-package comparator is committed to a new design.
Alternativas directas para AD9686TQ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
No hay alternativas directas disponibles para este producto.
Solicitar alternativasAD9686TQ Valores máximos y características eléctricas
| Product Type | Single voltage comparator |
| Comparator Type | Bipolar single comparator |
| Propagation Delay | 7 ns |
| Input Offset Voltage | 2 mV |
| Corriente de alimentación | 35 mA |
| Input Bias Current | 4 uA |
| Rango de temperatura de funcionamiento | -55°C to +125°C |
| Encapsulado | 16-pin CERDIP |
| Recuento de pines | 16 pins |
| Tipo de salida | TTL-compatible latch function |
| Technology | Bipolar |
| Tipo de montaje | Through-hole ceramic dual-inline package |
| Military Temperature Grade | -55°C to +125°C |
Guía de configuración de pines de AD9686TQ 16-pin cerdip
Configuración de pines para AD9686TQ (encapsulado 16-pin cerdip). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para AD9686TQ.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
AD9686TQ es adecuado para 6 aplicacións: High-Speed Pulse Detection, Zero-Cross and Level Monitoring, Instrumentation Signal Conditioning, Industrial Control and Automation, Automatic-Range Measurement, Legacy Maintenance and Retrofit.
High-Speed Pulse Detection
The AD9686TQ is suitable for detecting narrow pulse edges because its 7 ns propagation delay limits timing uncertainty at the comparator output. Connect one input to a biased threshold and the other to the pulse source, then add controlled positive feedback when the source crosses the threshold slowly. The 4 uA input bias current limits loading on high-impedance pulse generators. Because the offset voltage is 2 mV, condition small signals before comparison or specify a hysteresis band that is comfortably above the expected noise level. The TTL-compatible output can drive a counter, capture circuit, or downstream digital control stage without an intermediate amplifier.
Recomendado
Zero-Cross and Level Monitoring
The AD9686TQ can convert an analog crossing event into a logic transition for zero-cross detection, limit monitoring, and threshold supervision. Its 7 ns propagation delay supports accurate event timing, while the 2 mV input offset defines the practical uncertainty region around the threshold. Use hysteresis to prevent a noisy or slowly varying input from repeatedly crossing the switching point. The 35 mA supply current must be included in the analog power budget, and the -55°C to +125°C operating range supports equipment exposed to severe environmental conditions.
Recomendado
Instrumentation Signal Conditioning
In test and measurement equipment, the AD9686TQ can compare a conditioned sensor signal against a reference voltage and produce a fast control decision for an ADC, counter, or data-acquisition system. The 4 uA input bias current is useful when the comparison source has relatively high impedance, and the 7 ns delay helps preserve timing relationships between measured events and control actions. The 2 mV offset requirement should be evaluated against the smallest signal excursion of interest. Input protection, reference filtering, and intentional hysteresis are more important than propagation delay when the decision is made close to the analog noise floor.
Recomendado
Industrial Control and Automation
The AD9686TQ fits legacy industrial control, motion, and process-monitoring designs that require fast bipolar threshold decisions across an extended temperature range. Its -55°C to +125°C rating covers harsh equipment environments, and the TTL-compatible latch-function output supports event capture and sequencing. The through-hole 16-pin ceramic package is mechanically durable for legacy chassis and board designs. Before adopting it in a new controller, verify the exact supply-voltage range, input common-mode limits, and latch truth table in the manufacturer datasheet, and budget for the 35 mA operating current.
Recomendado
Automatic-Range Measurement
The AD9686TQ can implement an automatic-range decision by comparing an attenuated measurement signal with a precision reference threshold. Its 7 ns response allows the range-change decision to be registered rapidly, while the 4 uA bias current reduces disturbance to the measured node. A 2 mV offset places a limit on the smallest usable measurement increment, so adequate amplification and filtering are required when the source signal approaches that range. The extended-temperature capability allows the same comparison stage to operate in industrial or military-temperature equipment without relying on a commercial-temperature plastic package.
Recomendado
Legacy Maintenance and Retrofit
The AD9686TQ is well suited to repairing or extending legacy analog control equipment where an existing board uses a 16-pin ceramic DIP single comparator. Maintaining the original technology can reduce board-layout risk, provided the replacement device has the same electrical limits, pin functions, and latch behavior. The ceramic package and -55°C to +125°C operating range make it particularly relevant to older industrial and defense-related systems. For such builds, specify required traceability, connector finish, and date-code handling in the purchase request, and validate the complete board for timing margin after substitution.
Recomendado
Datos de referencia de ingeniería para AD9686TQ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto |
|---|---|
| Package | 16-pin CERDIP |
| Brand | Analog Devices |
| Comparator Configuration | Single bipolar comparator |
| Propagation Delay | 7 ns |
| Input Offset Voltage | 2 mV |
| Supply Current | 35 mA |
| Input Bias Current | 4 uA |
| Operating Temperature Range | -55°C to +125°C |
| Output Function | TTL-compatible latch function |
Diferenciadores clave
- Very fast threshold decision (frente a General-purpose comparators with longer propagation delays)
- Extended environmental temperature capability (frente a Commercial-temperature plastic-package comparators)
- Low input bias with ceramic-package construction (frente a Surface-mount comparators using different packages)
Notas de diseño
Do not treat the 2 mV input offset voltage as a usable measurement resolution near the switching threshold. Add hysteresis where the input can cross slowly, and keep the comparison excursion comfortably above that offset. The 7 ns propagation delay is excellent for timing, but it does not remove errors caused by input noise, reference drift, or slow slope noise at the threshold.
Route the two comparison inputs as a compact, balanced pair and keep them away from switching nodes and high-current return paths. Place input-referring and bypass components close to their associated pins, and verify the pin functions against the manufacturer pin-description table before layout release. The 16-pin ceramic package requires adequate clearance for through-hole assembly and for the mechanical tolerances of legacy boards.
Budget for the 35 mA operating supply current and add margin for output loading, temperature, and component tolerance when designing the supply. Decouple the device close to its supply pins, and confirm the permitted supply range and capacitor recommendations in the manufacturer application information. Treat the resulting dissipation as a thermal-design item when the device operates in a sealed or elevated-temperature enclosure.
Información de cumplimiento
The available manufacturer and distributor listings identify the package and operating-temperature characteristics but do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. The -55°C to +125°C rating describes temperature capability, not AEC-Q100 qualification.
