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ADG419 SPDT Analog Switch

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by Ray

Single-pole double-throw (SPDT) analog switch with low on-resistance, single or dual supply.

analog-switchspdtmuxlow-rdsadisoic-8
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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 (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