The DG421/DG423/DG425 are precision, dual CMOS switches with latchable logic inputs that simplify inter- facing with microprocessors (µPs). The single-pole/single- throw DG421 and double-pole/single-throw DG425 are normally open dual switches. The dual, single- pole/double-throw DG423 has two normally open and two normally closed switches. Fast switching, low switching voltage and low switching current.
The DG421, DG423, and DG425 are precision, dual CMOS analog switches with latchable logic inputs, designed for battery‑powered and micro‑processor‑compatible applications. They offer low on‑resistance, fast switching, and low power consumption.
Key specifications include on‑resistance matching of up to 3 Ω, flatness of 4 Ω across the signal range, charge injection limited to 15 pC, and operation from a single +10 V to +30 V supply or bipolar ±4.5 V to ±20 V supplies. The datasheet also provides pin configurations, ordering information, and typical performance graphs. This manual is written in Chinese.
| Typical on‑resistance | 20 Ω |
|---|---|
| On‑resistance match (max) | 3 Ω |
| On‑resistance flatness (max) | 4 Ω |
| Maximum charge injection | 15 pC |
| Off‑leakage current at +85 °C | <5 nA |
| Supply voltage range | +10 V to +30 V single‑supply or ±4.5 V to ±20 V bipolar |
| Switching times | tON 175 ns, tOFF 145 ns |
| Maximum power consumption | 35 µW |
The typical on‑resistance is 20 Ω.
The maximum charge injection is 15 pC.
They operate from a single +10 V to +30 V supply or bipolar ±4.5 V to ±20 V supplies.
tON is 175 ns and tOFF is 145 ns.