ADG419 SPDT Analog Switch

@@ -0,0 +1,56 @@+# ADG419++**Analog Devices** · Analog Switch · SOIC-8++The ADG419 is a single-pole double-throw (SPDT) analog switch with low on-resistance (about 25 ohm) and fast switching. A logic input selects which of two inputs connects to the common terminal, routing analog or digital signals. It runs from a single 12 V or dual +-5 V supply and is used for signal multiplexing and channel selection.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | D | bidirectional | Drain terminal of the SPDT switch. May be used as an input or an output; carries analog signals in the range VSS to VDD. |+| 2 | S1 | bidirectional | Source terminal 1 of the SPDT switch. May be an input or an output; connected to D when the switch is ON (logic 0 selects S1). |+| 3 | GND | power_in | Ground (0 V) reference for the device. |+| 4 | VDD | power_in | Most positive power supply potential. Typical +15 V (dual supply) or +12 V (single supply); 44 V max VDD-to-VSS. |+| 5 | VL | power_in | Logic power supply, nominally +5 V (±10%). Sets the reference rail for the digital input threshold (VINH ≥ 2.4 V, VINL ≤ 0.8 V). |+| 6 | IN | input | Logic control input. Logic 0 turns Switch 1 (S1↔D) ON and Switch 2 OFF; logic 1 turns Switch 2 (S2↔D) ON and Switch 1 OFF. CMOS/TTL compatible referenced to GND and VL. |+| 7 | VSS | power_in | Most negative power supply potential in dual-supply applications (typ. −15 V). In single-supply applications this pin may be connected to GND. |+| 8 | S2 | bidirectional | Source terminal 2 of the SPDT switch. May be an input or an output; connected to D when the switch is ON (logic 1 selects S2). |++## Key specifications++| Parameter | Value |+|---|---|+| Type | SPDT analog switch |+| On-resistance | 25 ohm typ |+| Switching time | <175 ns |+| Control | Single logic input (TTL/CMOS) |+| Supply voltage | Single 12 V or dual +-5 V |+| Charge injection | Low |+| Operating temperature | -40 C to 85 C |++## Ordering variants++- `ADG419BNZ`+- `ADG419TNZ`+- `ADG419BRZ`+- `ADG419TRZ`+- `ADG419BRMZ`+- `ADG419TRMZ`+- `ADG419TQ`++## CAD (KiCad official)++- Symbol: `adg419.kicad_sym`+- Footprint: `adg419.kicad_mod`+- 3D model: SOIC-8 body from KiCad `Package_SO/SOIC-8_3.9x4.9mm_P1.27mm`.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/ADG419.pdf) (16 pp, sha256 `99f7f2e00c10da77`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/adg419-datasheet.pdf)

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