MAX329

Voltage Referenced to V-V+........................................+44V
GND.............................................................................+25V
Digital Inputs (Note 1), VS, VD....................-2V to (V+ + 2V)
Current (Any Terminal, Except S or D)..........................30mA
Continuous Current, S or D
(pulsed at 1ms, 10% duty cycle max) ..........................40mA
Operating Temperature Range
MAX328/329 C _ _ ........................................0°C to +70°C
MAX328/329 E _ _ .....................................-40°C to +85°C
MAX328/329 M _ _....................................-55°C to +125°C
Power Dissipation (Package) (Note 1)
16-Pin CERDIP (Note 2) ................................ .............900mW
16-Pin Plastic DIP (Note 3)..........................................470mW
16-Pin Wide SO (Note 4) ............................................750mW
16-Pin QFN (Note 5) ..................................................1538mw
Storage Temperature.................................-65°C to +150°C
Note 1: All leads soldered or welded to PC board.
Note 2: Derate 12mW/°C above +75°C.
Note 3: Derate 6.3mW/°C above +75°C.
Note 4: Derate 10mW/°C above +75°C.
Note 5: Derate 19.2mW/°C above +75°C.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX329 are monolithic CMOS analog multiplexers. The MAX328 is a single-ended, 1-of-8 device, and the MAX329 is a differential, 2-of-8 device.

Designed to provide the lowest possible on- and offleakages, these multiplexers switch signals from high source impedance, providing the mux operates into a high-input-impedance op amp or A/D converter. The MAX328/MAX329 are pin-for-pin replacements for the popular DG508/DG509 in these applications.

 Adding an external 40k resistor to each input makes the MAX328/MAX329 an excellent fault-tolerant multiplexer. Low leakage (less than 1pA at +25°C) and 2.5k on-resistance allow the circuit to sustain 110V AC faults indefinitely while maintaining an error of less than 40nV for normal signals (i.e., 1pA times 40k).

The MAX328/MAX329 work equally well with a single supply of 10V to 30V or dual supplies of ±5V to ±18V. They also perform well with unbalanced combinations of supply voltage, such as +12V and -5V or +5V and -15V. Low power dissipation (1.9mW with ±15V supplies) allows use in portable applications.