The MAX398/MAX399 precision, monolithic, CMOS analog multiplexers (muxes) offer low on-resistance (less than 100Ω), which is matched to within 6Ω between channels and remains flat over the specified analog signal range (11Ω max). They also offer low leakage over temperature (NO off-leakage current less than 2.5nA at +85°C) and fast switching speeds (transition time less than 250ns). The MAX398 is an 8-channel device, and the MAX399 is a dual 4-channel device. The MAX398/MAX399 are fabricated with Maxim’s low-voltage silicon-gate process. Design improvements yield extremely low charge injection (less than 5pC) and guarantee electrostatic discharge protection (ESD) greater than 2000V. These muxes operate with a single +3V to +15V supply or bipolar ±3V to ±8V supplies, while retaining CMOS-logic input compatibility and fast switching. CMOS inputs provide reduced input loading. The MAX398/MAX399 are pin compatible with the industry-standard DG408, DG409, DG508A, and DG509A.
The MAX398 is an 8‑channel CMOS analog multiplexer, while the MAX399 provides two 4‑channel sections. Both devices feature low on‑resistance (< 100 Ω), tight channel matching (< 6 Ω), low charge injection (< 5 pC) and high ESD protection (> 2000 V). They operate from a single +3 V to +15 V supply or bipolar ±3 V to ±8 V supplies and are pin‑compatible with DG408/DG409/DG508A/DG509A.
Typical applications include sample‑and‑hold circuits, automatic test equipment, heads‑up displays, military radios and low‑voltage data‑acquisition systems. Detailed electrical characteristics, pin descriptions, package options and ordering information are provided throughout the document.
| On‑Resistance | < 100 Ω |
|---|---|
| Channel Matching | < 6 Ω |
| Off‑Leakage Current | < 2.5 nA at +85 °C |
| Charge Injection | < 5 pC |
| ESD Protection | > 2000 V |
| Supply Voltage (single) | +3 V to +15 V |
| Supply Voltage (bipolar) | ±3 V to ±8 V |
The MAX398 can be powered from a single +3 V to +15 V supply or from bipolar ±3 V to ±8 V supplies.
Both devices have an on‑resistance of less than 100 Ω, with channel‑to‑channel matching within 6 Ω.
Yes, they are pin‑compatible with the industry‑standard DG408, DG409, DG508A, and DG509A.
The devices provide ESD protection greater than 2000 V.