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MAX4617 Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX4617 Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 16 page ![]() The logic-level thresholds are TTL/CMOS compatible when VCC is +5V. As VCC rises, the threshold increases; as VCC falls, the threshold decreases. For example, when VCC = +3V the guaranteed minimum logic-high threshold decreases to 2.0V. Power Supply These devices operate from a single supply between +2.5V and +5.5V. All of the bipolar precautions must be observed. At room temperature, they actually “work” with a single supply near or below +2V, although as supply volt- age decreases, switch on-resistance becomes very high. Overvoltage Protection Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maxi- mum ratings because stresses beyond the listed ratings can cause permanent damage to the devices. Always sequence VCC on first, followed by the logic inputs and analog signals. If power-supply sequencing is not pos- sible, add two small signal diodes (D1, D2) in series with the supply pins for overvoltage protection (Figure 1). Adding diodes reduces the analog-signal range to one diode drop below VCC and one diode drop above GND, but does not affect the devices’ low switch resistance and low leakage characteristics. Device operation is unchanged, and the difference between VCC and GND should not exceed 6V. These protection diodes are not recommended if signal levels must extend to ground. High-Frequency Performance In 50Ω systems, signal response is reasonably flat up to 50MHz (see Typical Operating Characteristics). Above 20MHz, the on-response has several minor peaks that are highly layout dependent. The problem is not turning the switch on, but turning it off. The off-state switch acts like a capacitor and passes higher frequencies with less attenuation. At 10MHz, off-isolation is about -50dB in 50Ω systems, becoming worse (approximately 20dB per decade) as frequency increases. Higher circuit impedances also degrade off-isolation. Adjacent channel attenuation is about 3dB above that of a bare IC socket and is entirely due to capacitive coupling. Pin Nomenclature TheMAX4617/MAX4618/MAX4619arepincompatiblewith the industry-standard 74HC4051/74HC4052/74HC4053 and the MAX4581/MAX4582/MAX4583. In single-supply applications, they function identically and have identical logic diagrams, although these parts differ electrically. The pin designations and logic diagrams in this data sheet conform to the original 1972 specifications pub- lished by RCA for the CD4051/CD4052/CD4053. These designations differ from the standard Maxim switch and mux designations found on other Maxim data sheets (including the MAX4051/MAX4052/MAX4053) and may cause confusion. Designers who feel more comfortable with Maxim’s standard designations are advised that the pin designations and logic diagrams on the MAX4051/ MAX4052/MAX4053 data sheet may be freely applied to the MAX4617/MAX4618/MAX4619. Figure 1. Overvoltage Protection Using External Blocking Diodes X, Y, Z X_, Y_, Z_ VEE VCC *INTERNAL PROTECTION DIODES D2 EXTERNAL BLOCKING DIODE D1 EXTERNAL BLOCKING DIODE GND VCC MAX4617 MAX4618 MAX4619 * * * * www.analog.com Analog Devices │ 9 MAX4617/MAX4618/ MAX4619 High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches |
Similar Part No. - MAX4617_V01 |
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Similar Description - MAX4617_V01 |
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