ADG849YKSZ-REEL7 - 0.5Ω SPDT CMOS Switch, 1.8-5.5V | Analog Devices
N.º de pieza: ADG849YKSZ-REEL7 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.18 | $21,80 |
| 100 | $1.85 | $185,00 |
| 500 | $1.62 | $810,00 |
| 1.000 | $1.4 | $1.400,00 |
ADG849YKSZ-REEL7 Descripción general
An analog switch (or CMOS switch) is a solid-state device that routes analog or digital signals between two or more paths using MOSFET pass transistors controlled by a logic-level input. SPDT switches sit within the broader hierarchy of analog switch → multiplexer → signal-redirect component → data-acquisition subsystem. They are essential building blocks when designers need to multiplex sensors, swap signal sources, or isolate functional blocks without mechanical relays, and they appear throughout the signal-chain hierarchy from sensor interface to ADC front-end.
Key features include excellent audio performance with ultra-low distortion, automotive-grade temperature range from -40 °C to +125 °C, break-before-make switching action, and TTL/CMOS-compatible digital inputs. The SC-70-6 footprint is among the smallest available SPDT packages, enabling high-density board layouts in portable and space-constrained designs. The part is a pin-compatible upgrade for several legacy SPDT switches, simplifying migration paths in existing designs.
The ADG849 uses a charge-balanced N-channel MOSFET architecture for each channel, achieving low charge injection and low leakage. Its symmetric on-resistance profile across the input signal range minimizes total harmonic distortion when passing audio or precision analog signals, making it suitable for high-fidelity signal routing.
Typical applications include portable audio signal routing, USB 2.0 high-speed signal switching, cell-phone and PDA audio/mux paths, battery-powered instrumentation, modems, hard drives, and PCMCIA cards. The 1.8 V minimum supply makes it directly compatible with modern low-voltage ASICs and microcontrollers.
When designing with this device, place decoupling capacitors (100 nF typical) as close as possible to the VDD pin and ensure the digital control input is driven with clean logic levels to prevent transient feedthrough. The exposed pad (if present) should be soldered to a grounded copper pour for thermal and mechanical stability.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB-layout guidance that is not available on standalone distributor listings, giving the engineer a single, citable reference for component selection.
Alternativas directas para ADG849YKSZ-REEL7 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ADG849YKSZ-REEL7 (mismo factor de forma y huella) — difiere en Configuration, Logic Family, Operating Temperature.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADG749BKSZ-REEL7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG779BKSZ-REEL7
✅ Sustitución directa✓ En stock
$1.41 / unidad
Ver hoja de datos →ADG841YKSZ-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG842YKSZ-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG849YKSZ-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG849YKSZ-REEL7 Valores máximos y características eléctricas
| Configuration | SPDT (1 Circuit, 2:1 Mux) |
| On-Resistance (Ron) Typical | 0.5 Ω |
| On-Resistance (Ron) Maximum | 0.8 Ω at 5 V |
| Ron Flatness Typical | 0.13 Ω |
| Ron Flatness Maximum | 0.24 Ω |
| Supply Voltage Range (Single Supply) | 1.8 V to 5.5 V |
| Continuous Current | 400 mA |
| Peak Current at 5 V | 600 mA |
| Typical Power Consumption | <0.01 µW |
| Rango de temperatura de funcionamiento | -40 °C to +125 °C (automotive) |
| Encapsulado | SC-70-6 (KS) |
| Tipo de montaje | Surface Mount |
| Signal Range | Rail-to-rail |
| Switch Action | Break-before-make |
| Digital Input Compatibility | TTL/CMOS |
| Estado RoHS | Compliant |
Configuración de pines de ADG849YKSZ-REEL7
| Pin 1 | IN — Digital control input (TTL/CMOS compatible); selects between S1 and S2 |
| Pin 2 | GND — Ground reference |
| Pin 3 | VDD — Positive supply input (1.8 V to 5.5 V); decouple with 100 nF capacitor |
| Pin 4 | D — Common drain / signal path output |
| Pin 5 | S2 — Source 2 (alternate signal input) |
| Pin 6 | S1 — Source 1 (default signal input) |
Aplicaciones típicas
ADG849YKSZ-REEL7 es adecuado para 6 aplicacións: Portable Audio Signal Routing, USB 2.0 High-Speed Signal Multiplexing, Cell Phone / PDA Audio and Multiplexer Paths, Battery-Powered Instrumentation, Modem and Hard Drive Signal Routing, PCMCIA Card Multiplexing.
Portable Audio Signal Routing
The ADG849YKSZ-REEL7's 0.5 Ω typical on-resistance and 0.13 Ω RON flatness make it well suited for routing audio signals between headphone, line-out, and Bluetooth paths in portable audio devices. Its 1.8 V to 5.5 V supply range aligns directly with lithium-ion and USB-powered rails, eliminating level shifters and minimizing BOM count. Compared with mechanical relays, the ADG849 introduces no click noise and offers sub-microsecond switching, critical for click-free audio muxing. With 400 mA continuous current capability, the part can additionally switch headphone amplifier supply lines. Recommended companion parts: AD8534ARZ-REEL (audio op-amp), ADG1219BRJZ-REEL7 (additional SPDT switch for channel expansion).
Recomendado
USB 2.0 High-Speed Signal Multiplexing
The ADG849YKSZ-REEL7's low capacitance, break-before-make action, and 0.5 Ω Ron preserve USB 2.0 high-speed signal integrity when multiplexing between host and device controllers or between OTG ports. Rail-to-rail signal handling allows the switch to pass D+/D- lines cleanly across the full 0 V to 3.3 V USB common-mode range. The SC-70-6 footprint saves board space in compact dongles, phones, and tablets where USB multiplexing is required. Designers should keep trace impedance matched to 90 Ω differential and minimize stub lengths to the switch. Recommended companion parts: ADG1206YCPZ-REEL7 (high-channel-count analog switch), ADA4622-1ARJZ-R2 (precision buffer for sensing).
Recomendado
Cell Phone / PDA Audio and Multiplexer Paths
The ADG849YKSZ-REEL7 is explicitly listed in the Analog Devices ADG849 datasheet as suitable for cell-phone and PDA audio and mux paths. Its 1.8 V minimum supply matches typical baseband and PMIC rails without boost circuitry, and the SC-70-6 package fits beneath shields in handset PCBs. The 0.5 Ω typical Ron preserves audio dynamic range, while the <0.01 µW quiescent power consumption preserves battery life during standby. Designers can use the switch to alternate between microphone, earpiece, and external speaker amplifier paths with minimal BOM impact. Recommended companion parts: ADG1204YCPZ-500RL7 (4-channel DPDT switch for additional paths), AD8676BRMZ (low-noise audio op-amp).
Recomendado
Battery-Powered Instrumentation
The ADG849YKSZ-REEL7's <0.01 µW typical power consumption and 1.8 V minimum supply make it ideal for battery-powered instrumentation such as handheld multimeters, portable medical monitors, and field data loggers. The 400 mA continuous current rating allows the switch to multiplex power rails in addition to signal lines, simplifying power-tree design. Its -40 °C to +125 °C automotive temperature rating extends operating headroom for outdoor and industrial environments. The SC-70-6 footprint minimizes board area in compact handheld enclosures. Recommended companion parts: AD8237ARMZ (low-power instrumentation amp), AD8436ACPZ-R7 (precision op-amp).
Recomendado
Modem and Hard Drive Signal Routing
The ADG849YKSZ-REEL7 is specified by Analog Devices for modem and hard-drive signal routing, where its low Ron and break-before-make switching preserve data integrity across hot-plug or path-selection events. The rail-to-rail signal range accommodates the bipolar signaling common in legacy modem interfaces, while the SC-70-6 footprint enables high-density board layouts on storage controller PCBs. Designers can use the switch to alternate between primary and redundant storage paths or to isolate modem line-driver outputs during power-down. Recommended companion parts: AD9516-0BCPZ-REEL7 (clock generator for synchronous sampling), AD9609BCPZ-80 (high-speed ADC for signal capture).
Recomendado
PCMCIA Card Multiplexing
The ADG849YKSZ-REEL7 supports PCMCIA card multiplexing as listed in the Analog Devices ADG849 datasheet. Its compact SC-70-6 package fits the tight pitch of PCMCIA connector pin cards, and the 5.5 V maximum supply matches the legacy PC Card interface voltage. Low Ron and low distortion preserve the analog audio and signaling paths that share PCMCIA pins. With 400 mA continuous current, the part can switch VCC rails in addition to data lines, simplifying power-sequencing logic. Recommended companion parts: ADG1408YRUZ-REEL7 (8-channel analog mux for multi-pin multiplexing), AD7865YSZ-1 (high-speed ADC for data acquisition).
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADG849YKSZ-REEL7 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADG749BKSZ-REEL7 | ADG779BKSZ-REEL7 | ADG841YKSZ-REEL | ADG842YKSZ-REEL | ADG849YKSZ-REEL |
|---|---|---|---|---|---|---|
| Package | SC-70-6 (KS) | SC-70-6 - same | SC-70-6 - same | SC-70-6 - same | SC-70-6 - same | SC-70-6 - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Configuration | SPDT (2:1) | SPDT (2:1) | SPDT (2:1) | SPST (1:1 NO) | SPST (1:1 NC) | SPDT (2:1) |
| On-Resistance (typ) | 0.5 Ω | 3 Ω | 3 Ω | 0.4 Ω | 0.4 Ω | 0.5 Ω |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.8 V to 5.5 V |
| Automotive Temp Range | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
Diferenciadores clave
- Lowest Ron in SC-70-6 SPDT family (frente a ADG749BKSZ-REEL7)
- Same die as ADG849YKSZ-REEL, alternative reel quantity (frente a ADG849YKSZ-REEL)
- 2:1 SPDT topology with high current capability (frente a ADG841YKSZ-REEL)
Notas de diseño
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 3) and a bulk 1 µF to 10 µF capacitor on the same supply node. Keep the GND return path short and direct to a low-impedance ground plane. Maintain symmetric trace lengths on S1 and S2 to preserve timing balance and minimize channel-to-channel skew. Avoid routing noisy digital or RF traces directly over the switch to prevent capacitive coupling into the analog signal path.
The ADG849's 0.5 Ω typical Ron and 0.13 Ω Ron flatness ensure low total harmonic distortion, but the source impedance of the driven signal still matters. Keep source impedance below 1 kΩ for best THD performance in audio paths. For USB 2.0 high-speed routing, maintain 90 Ω differential impedance and minimize stub lengths to within 3 mm to preserve eye-diagram margin. Use the break-before-make switching action to avoid momentary shorting between S1 and S2 during transitions.
Although the SC-70-6 package is small, the ADG849 can dissipate significant power when switching 400 mA continuous current at full 5 V supply. Estimated: at 400 mA and Ron = 0.8 Ω max, the switch dissipates approximately 0.13 W (P = I² × R). With SC-70-6 theta_JA around 400 °C/W, the junction temperature rise above ambient is roughly 52 °C. At 125 °C ambient, junction temperature reaches about 177 °C - exceeding the 150 °C absolute maximum. Derate current above 85 °C ambient or provide additional copper pour to keep junction within safe limits.
Do not exceed the absolute maximum ratings: VDD must stay within -0.3 V to +7 V, and analog signal inputs must remain within -0.3 V to VDD + 0.3 V. Driving signals beyond these limits can permanently damage the ESD protection diodes. Always drive the digital control input (IN, pin 1) with clean logic levels - floating or slow edges can cause both channels to be momentarily enabled, resulting in cross-conduction. Add a pull-up or pull-down resistor on the IN pin if it can be left floating during power-up.
Información de cumplimiento
RoHS and REACH compliant per Analog Devices product page. Automotive temperature range (-40 °C to +125 °C) is specified but the part is not explicitly AEC-Q100 qualified as of the latest available data; verify with manufacturer for automotive qualification status.
