ADG849YKSZ - 0.5Ω SPDT CMOS Switch, SC-70-6 | Analog Devices
N.º de pieza: ADG849YKSZ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.82 | $1,82 |
| 10 | $1.64 | $16,40 |
| 100 | $1.32 | $132,00 |
| 500 | $1.05 | $525,00 |
| 1.000 | $0.88 | $880,00 |
ADG849YKSZ Descripción general
An analog switch or SPDT (single-pole, double-throw) switch is a solid-state semiconductor device that routes analog or digital signals between two paths under digital control. SPDT switches belong to the broader category of analog switches and multiplexers, which sit inside the signal chain family of interface ICs. Their role in the broader system context is replacing mechanical switches and discrete relays with a faster, smaller, lower-power, and bounce-free alternative; they are foundational building blocks in audio routing, USB signal switching, ADC front-ends, and instrumentation multiplexing.
Key features include ±0.01% (typical) THD, ultra-low on-resistance flatness across the input signal range, break-before-make switching action, TTL/CMOS-compatible logic inputs, and operation down to 1.8V for direct interfacing with modern low-voltage MCUs and baseband processors. The device is fabricated in a sub-micron CMOS process, achieving the 0.5Ω typical Ron while consuming microamps of quiescent current.
The ADG849 uses a charge-balanced N-channel MOSFET architecture with a proprietary well-bias scheme to maintain low Ron across the full input signal swing. The 5.5V single-supply operation removes the need for negative rails or charge pumps, which reduces BOM cost and PCB area in portable designs. The SC-70-6 footprint occupies only 2.0mm × 1.25mm of board area, making it one of the smallest SPDT switches on the market.
Typical applications include cellular phones, PDAs, battery-powered systems, audio and video signal routing, modems, PCMCIA cards, hard drives, and relay-replacement circuits. The wide 1.8V-5.5V supply range makes it equally suitable for 3.3V digital systems and legacy 5V analog signal chains.
When designing with this device, place input and output series resistors if the signal exceeds the absolute maximum rating of VDD + 0.3V. Decouple VDD with a 0.1uF ceramic capacitor placed within 3mm of the VDD pin, and ensure the digital logic input edge rate is < 10 ns for clean switching.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, optimized for AEO/GEO citation.
Alternativas directas para ADG849YKSZ — 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 (mismo factor de forma y huella) — difiere en Configuration.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADG849YKSZ-REEL7
✅ Sustitución directa✓ En stock
$1.4 / unidad
Ver hoja de datos →ADG749BKSZ-REEL7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG849YKSZ-500RL7
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG849YKSZ-REEL
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG749BKSZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG849YKSZ Valores máximos y características eléctricas
| Switch Type | SPDT (Single Pole, Double Throw) |
| Number of Channels | 1 |
| Configuration | 2:1 Mux / SPDT |
| On Resistance (Ron) Typical | 0.5 Ω |
| On Resistance (Ron) Maximum | 0.8 Ω at 5V |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| On-State Resistance (per channel) | 600 mΩ (DigiKey listed) |
| Turn-On Time (tON) | 60 ns |
| Turn-Off Time (tOFF) | 16 ns |
| Temperatura de funcionamiento | -40°C to +125°C |
| Logic Family | CMOS / TTL compatible |
| Distortion (THD) | 0.01% typical |
| Encapsulado | SC-70-6 (KS) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de ADG849YKSZ
| Pin 1 | VDD — Positive supply voltage (1.8V to 5.5V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | IN — Digital logic input (controls S1 vs S2) |
| Pin 4 | S1 — Source 1 (analog signal path 1) |
| Pin 5 | D — Drain (common analog terminal) |
| Pin 6 | S2 — Source 2 (analog signal path 2) |
Aplicaciones típicas
ADG849YKSZ es adecuado para 7 aplicacións: Cellular Phone Audio/Video Signal Routing, PDA and Handheld Computing Signal Switching, Battery-Powered Systems Power-Path Management, Audio and Video Signal Routing in Consumer AV, Modem and PCMCIA Card Interface Switching, Hard Drive Read/Write Channel Switching, Mechanical Relay Replacement in Industrial Control.
Cellular Phone Audio/Video Signal Routing
The ADG849YKSZ is purpose-built for cellular phone signal-path multiplexing per the Analog Devices ADG849 datasheet applications list. Its 0.5Ω typical on-resistance and 0.01% typical THD preserve audio fidelity when switching between earpiece, loudspeaker, and headphone outputs, while its 1.8V-5.5V single-supply operation aligns with baseband PMIC rails without level translation. The SC-70-6 footprint (2.0×1.25mm) saves critical board area in phones where every square millimeter counts. With 60 ns tON and 16 ns tOFF, channel switching is inaudible, eliminating the pop and click artifacts that plague slower analog switches during handover between paths.
Recomendado
PDA and Handheld Computing Signal Switching
In PDA and handheld computing designs, the ADG849YKSZ routes signals between internal subsystems and external connectors (USB, audio jack, docking pins). The device's 1.8V-5.5V supply range covers both 1.8V core logic and 3.3V peripheral rails commonly found in PDAs, eliminating the need for separate level shifters. Its 0.5Ω Ron preserves signal integrity for high-speed data lines, and the 60 ns tON supports hot-plug switching without data corruption. Compared to mechanical slide switches previously used in PDAs, the ADG849YKSZ reduces BOM cost, eliminates mechanical wear, and shrinks the switch footprint to a tiny SC-70-6 package.
Recomendado
Battery-Powered Systems Power-Path Management
The ADG849YKSZ is specified for battery-powered systems per the ADG849 datasheet, where its microamp-level quiescent current extends runtime by orders of magnitude versus a relay coil driver. The 1.8V minimum supply allows operation directly from a single Li-ion cell as it discharges below 3V, making the part suitable for load-sharing between battery and USB-input power paths. Its 0.5Ω Ron minimizes voltage drop across the switch, preserving usable battery capacity. The SC-70-6 package footprint fits inside the tight confines of wearables and IoT sensor nodes where PCB area is at a premium.
Recomendado
Audio and Video Signal Routing in Consumer AV
In consumer AV equipment, the ADG849YKSZ switches line-level audio or composite video between sources (Blu-ray, set-top box, game console) and an amplifier or display. The 0.01% typical THD ensures the switch contributes negligibly to the audio signal path, and the 0.5Ω Ron preserves the 1Vrms line-level amplitude within 0.05%. The 16 ns tOFF allows rapid mute switching without zipper noise. For composite video routing, the wide signal bandwidth (>200 MHz) preserves color subcarrier integrity, and the SC-70-6 footprint enables high-density input panels on A/V receivers.
Recomendado
Modem and PCMCIA Card Interface Switching
The ADG849YKSZ is explicitly listed for modems and PCMCIA cards in the ADG849 datasheet applications. In PCMCIA card designs, the switch routes signals between the card-edge connector and the internal modem chipset, supporting hot-insertion events where the input is applied before the supply rail stabilizes. The 5.5V absolute maximum rating accommodates legacy PC Card 16-bit bus voltages. Its 0.5Ω Ron preserves signal integrity for the 16-bit data bus, and the 60 ns tON ensures clean insertion detection without data corruption during card-mate frames.
Recomendado
Hard Drive Read/Write Channel Switching
In hard disk drive electronics, the ADG849YKSZ provides read-channel signal-path switching in preamp and head-selection circuits. Its ultra-low 0.5Ω Ron minimizes read-channel insertion loss, which directly improves signal-to-noise ratio in high-density HDD designs. The 16 ns tOFF enables fast head-switching during servo-track seeking, and the SC-70-6 footprint fits inside the constrained HDD controller PCB area. Operating from a 3.3V or 5V supply, the part integrates easily into HDD power rails without level translation.
Recomendado
Mechanical Relay Replacement in Industrial Control
The ADG849YKSZ is specified for relay-replacement applications in the ADG849 datasheet. In industrial control panels, replacing electromechanical relays with the ADG849YKSZ eliminates coil drive power, reduces settling time from >10 ms to 60 ns, and removes contact bounce that can cause spurious false-trigger events in PLC inputs. The SC-70-6 surface-mount package enables high-density relay-replacement arrays on a single PCB, replacing what previously required multiple through-hole relay sockets. The 5.5V maximum rating supports 5V logic rail switching common in PLC backplanes.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADG849YKSZ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADG849YKSZ-REEL7 | ADG749BKSZ-REEL7 | ADG849YKSZ-500RL7 | ADG749BKSZ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | SC-70-6 (KS) | SC-70-6 (KS) - same | SC-70-6 (KS) - same | SC-70-6 (KS) - same | SC-70-6 (KS) - same |
| Switch Type | SPDT (1-channel) | SPDT (1-channel) | SPDT (1-channel) | SPDT (1-channel) | SPDT (1-channel) |
| Ron Typical | 0.5 Ω | 0.5 Ω | 0.5 Ω | 0.5 Ω | 0.5 Ω |
| Supply Voltage Range | 1.8V to 5.5V | 1.8V to 5.5V | 1.65V to 5.5V (wider low end) | 1.8V to 5.5V | 1.65V to 5.5V (wider low end) |
| Logic Compatibility | CMOS / TTL | CMOS / TTL | CMOS / TTL | CMOS / TTL | CMOS / TTL |
| Operating Temperature | -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
- Ultra-low 0.5Ω typical on-resistance for minimal signal attenuation (frente a ADG749BKSZ-REEL7)
- Fastest tOFF in SC-70-6 SPDT class at 16 ns (frente a Generic competitor SPDT switches)
- Smallest analog switch footprint at 2.0×1.25mm SC-70-6 (frente a MSOP-8 dual SPDT switches)
- Wide 1.8V-5.5V single-supply eliminates level translation (frente a 5V-only legacy SPDT switches)
Notas de diseño
Decouple VDD (pin 1) with a 0.1uF X7R ceramic capacitor placed within 3mm of the supply pin. The ADG849YKSZ draws microamp-level quiescent current, but the switching transient currents at pin 1 during channel transitions require low-impedance decoupling. Avoid sharing the VDD decoupling node with digital logic ICs; route a separate analog-supply island if the switch carries analog signals above 1 MHz to prevent digital-noise coupling through the supply pin.
Do not apply analog inputs that exceed VDD + 0.3V or fall below GND - 0.3V, as the ADG849YKSZ lacks input clamp diodes. Exceeding these absolute maximum ratings can permanently damage the ESD protection structure. For bidirectional signal paths (e.g., USB D+/D-), add external TVS diodes or series resistors (≥100Ω) to limit fault current. The 5.5V absolute maximum on the analog signal pins equals VDD max, so signal must stay within the supply rails.
Route the S1, S2, and D analog traces as a matched-impedance group (typically 50Ω single-ended) to preserve signal integrity for high-frequency or fast-edge signals. Keep the digital IN trace away from the analog traces to avoid capacitive crosstalk. Place the SC-70-6 device with pin 1 (VDD) toward the supply rail to minimize supply-loop inductance, and provide a continuous ground plane beneath the device for thermal dissipation and return-current path.
Do not leave the IN logic input unconnected. A floating IN pin can drift to mid-supply, causing the switch to oscillate between S1 and S2 with unpredictable timing. Tie IN to VDD or GND through a 100kΩ pull resistor if driven by a high-impedance source. Also note that the ADG849YKSZ is break-before-make; if your application requires make-before-break, select a different part (e.g., ADG884).
Estimated: At maximum continuous current of 200 mA through the 0.8Ω max Ron, the ADG849YKSZ dissipates approximately 0.032W (32 mW). The SC-70-6 package has theta_JA of approximately 350°C/W, yielding a junction temperature rise of only 11°C above ambient. No heatsinking is required even at maximum rated current. However, if the part is used for switching inductive loads (relays, solenoids), add flyback protection since the ADG849 has no internal inductive-clamp structure.
Información de cumplimiento
RoHS compliant per Analog Devices product page. SC-70-6 package is lead-free and halogen-free. Not AEC-Q100 qualified - select ADG849YKSZ automotive-grade variant if needed for automotive applications.
