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MAX4707EXT-T Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX4707EXT-T Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 11 page Detailed Description The MAX4706/MAX4707 SPST switches operate from a single supply ranging from 1.8V to 5.5V. The MAX4706 is a normally closed (NC) switch and the MAX4707 is the normally open (NO) version. These switches provide 3.5Ω on-resistance (RON) and 0.9Ω RON flatness with a +2.7V supply. These devices typically consume only 0.02µA of quiescent current, making them suitable for use in low-power, portable applications. The MAX4706/MAX4707 feature low-leakage currents over the entire temperature range, TTL/CMOS-compatible digital logic, and excellent AC characteristics. The MAX4706/MAX4707 are offered in small 5-pin and 6-pin SC70 and 6-pin µDFN packages. Applications Information The MAX4706/MAX4707 operate from a single +1.8V to +5.5V supply. The MAX4706/MAX4707 accept bipolar input signals when V+ and GND are biased from bipolar supplies. For example, the switch accepts a 1VP-P input when V+ = 2V and GND = -2V. ESD-protection diodes are internally connected between each analog switch terminal and both V+ and GND. One of these diodes conducts if any analog signal is greater than V+ or less than GND (Figure 1). Virtually all analog leakage current is attributed to the ESD diodes. Each diode is biased by the analog signal and either V+ or GND. The ESD diodes’ leakage currents vary as the signal changes. Power-Supply Sequencing and Overvoltage Protection Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals, especially if the analog signal is not current-limited. Low-Voltage, 2Ω, SPST, CMOS Analog Switches 6 _______________________________________________________________________________________ V+ POSITIVE SUPPLY D1 D2 N0 Vg GND COM MAX4706 MAX4707 Figure 1. Overvoltage Protection Using Two External Blocking Diodes tr < 5ns tf < 5ns 50% 0V LOGIC INPUT RL NO OR NC GND CL INCLUDES FIXTURE AND STRAY CAPACITANCE. VOUT = VCOM ( RL ) RL + RON SWITCH INPUT IN V+ tOFF 0V COM SWITCH OUTPUT 0.9 x V0UT 0.9 x V0UT tON VOUT SWITCH OUTPUT LOGIC INPUT LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. V+ CL V+ VOUT VCOM MAX4706 MAX4707 Figure 2. Switching Time |
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