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MAX4657

大电流、10Ω、SPST、CMOS模拟开关

概述

说明

Maxim's MAX4655–MAX4658 are medium-voltage CMOS analog switches with low on-resistance of 10Ω max, specifically designed to handle large switch currents. With a switch capability of up to 400mA peak current and 300mA continuous current (MAX4655/MAX4656), and up to 300mA peak current and 150mA continuous current (MAX4657/MAX4658), these parts can switch loads as low as 25Ω. They can replace reed relays with a million times the speed and virtually unlimited number of lifetime cycles. Normal power consumption is only 3mW, whether the switch is on or off. These parts are TTL/CMOS compatible and will switch any voltage within its power-supply range.

These are SPST (single-pole/single-throw) switches. The MAX4655/MAX4657 are normally closed (NC), while the MAX4656/MAX4658 are normally open (NO). The difference between the MAX4655/MAX4656 and the MAX4657/MAX4658 is in the power dissipation of their packages. Refer to the Absolute Maximum Ratings and the Electrical Characteristics in the full data sheet.

The MAX4655–MAX4658 power-supply range is from ±4.5V to ±20V for dual-supply operation and +9V to +40V for single-supply operation. These switches can operate from any combination of supplies, within a 40V V+ to V- range. They conduct equally well in either direction and can handle rail-to-rail analog signals. The offleakage current is only 1nA max at T_A = +25°C. They are available in 8-pin µMAX®, TDFN, and SO packages, with exposed paddle options for high-power applications.

MAX4655、MAX4656、MAX4657、MAX4658：原理框图

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关键特性

High Continuous Current Handling
- 300mA (MAX4655/MAX4656)
- 150mA (MAX4657/MAX4658)
High Peak Current Handling
- 400mA (MAX4655/MAX4656)
- 300mA (MAX4657/MAX4658)
10Ω (max) On-Resistance (±15V supplies)
V_L Not Required
1Ω (max) R_ON Flatness over Specified Signal Range
Rail-to-Rail Signal Handling
+12V Single Supply or ±15V Dual Supply Operation
Pin Compatible with DG417, DG418