MAX320/MAX321/MAX322 are precision, dual, SPST analog switches designed to operate from ±3V to ±8V dual supplies. MAX320 has two normally open (NO) switches and MAX321 has two normally closed (NC) switches. MAX322 has one NO and one NC switch. Low power consumption (1.25mW) makes these parts ideal for battery-powered equipment. They offer low leakage currents (100pA max) and fast switching speeds (tON = 150ns max, tOFF = 100ns max). The MAX320 series, powered from ±5V supplies, offers 35Ω max on-resistance (RON), 2Ω max matching between channels, and 4Ω max RON flatness. These switches also offer 5pC max charge injection and a minimum of 2000V ESD protection per Method 3015.7. For equivalent devices specified for single-supply operation, see the MAX323/MAX324/MAX325 data sheet. For quad versions of these switches, see the MAX391/MAX392/MAX393 data sheet.
The MAX320, MAX321, and MAX322 are precision, dual‑supply SPST analog switches designed for operation from ±3 V to ±8 V. They are suited for battery‑powered equipment, sample‑and‑hold circuits, audio/video switching, and many other applications.
Key features include low on‑resistance (35 Ω max, 16 Ω typical), low leakage current, fast switching (tON ≤ 150 ns, tOFF ≤ 100 ns), and robust ESD protection (>2000 V). The devices are available in various packages such as CERDIP, SO, µMAX, and plastic DIP, with temperature ranges from –55 °C to +125 °C.
| Supply Voltage Range | ±3 V to ±8 V |
|---|---|
| On‑Resistance (R_ON) max | 35 Ω |
| On‑Resistance (R_ON) typical | 16 Ω |
| Power Consumption | <1.25 mW |
| Leakage Current (max) | 100 pA |
| Leakage Current at +85 °C | <2.5 nA |
| Switching Time tON | ≤150 ns |
| ESD Protection | >2000 V |
| Charge Injection | <5 pC |
They operate from ±3 V to ±8 V dual supplies.
The MAX320 series has a maximum on‑resistance of 35 Ω.
Turn‑on time is up to 150 ns and turn‑off time up to 100 ns.
They provide greater than 2000 V ESD protection per IEC Method 3015.7.