ADG1438 and ADG1439 are CMOS multiplexers/matrix switches with features such as serial control, ±15 V/+12 V/±5 V operating voltage, and 8-channel/4-channel configurations.
The ADG1438 is an 8‑channel matrix switch and the ADG1439 is a dual 4‑channel matrix switch. Both devices use a versatile 3‑wire serial interface compatible with SPI, QSPI, MICROWIRE and most DSPs, allowing clock rates up to 50 MHz and optional daisy‑chaining via the SDO pin. They are suited for relay replacement, audio/video routing, test equipment, avionics, medical and battery‑powered systems.
Key specifications include on‑resistance as low as 9.5 Ω (typ) at +15 V, on‑resistance flatness of 1.6 Ω, 3 V logic‑compatible digital inputs, and a range of package options (20‑lead TSSOP and 20‑lead LFCSP). Continuous current per channel reaches up to 169 mA (15 V dual‑supply, TSSOP).
| Serial interface clock rate | up to 50 MHz |
|---|---|
| On‑resistance flatness | 1.6 Ω typ |
| Digital input high voltage (Vih) | 2.0 V min |
| Digital input low voltage (Vil) | 0.8 V max |
| Continuous current per channel (15 V dual‑supply, TSSOP) | 169 mA max |
The devices support a serial clock frequency of up to 50 MHz.
The ADG1438 is an 8‑channel matrix switch.