MAX329

Ultra-Low-Leakage, Single-Ended, Monolithic, CMOS Analog Multiplexer


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Description

The MAX328/MA329 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 off-leakages, 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 40kΩ resistor to each input makes the MAX328/MAX329 an excellent fault-tolerant multiplexer. Low leakage (less than 1pA at +25°C) and 2.5kΩ 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 40kΩ).

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.
MAX328, MAX329: Typical Operating Circuit MAX328, MAX329: Typical Operating Circuit Enlarge+

Key Features

  • Ultra-Low Off- and On-Leakage: 1pA Typ
  • Bidirectional Operation (Use as Mux or Demux)
  • TTL and CMOS Logic Compatibility
  • Analog-Signal Range Includes Power-Supply Rails
  • Switching Speeds Less Than 1.5µs
  • Pin Compatible with DG508/DG509 and MAX358/MAX359
  • Latchup Proof Construction
Part NumberFunctionsConfig.ChannelsVSUPPLY (Single)
(V)
VSUPPLY (Single)
(V)
VSUPPLY (Dual)
(±V)
VSUPPLY (Dual)
(±V)
RON
(Ω)
IL(OFF)
(nA)
tON
(ns)
tOFF
(ns)
QINJECTION
(pC)
CON
(pF)
COFF
(pF)
Package/PinsBudgetary
Price
minmaxminmaxmaxmaxmaxmaxSee Notes
MAX328 Mux8-to-1110304.51835000.01150010005101.8
CDIP(N)/16
PDIP(N)/16
SOIC(W)/16
THIN QFN/16
TQFN/16
$4.03 @1k
MAX329 4-to-126
CDIP(N)/16
PDIP(N)/16
SOIC(W)/16
THIN QFN/16
$8.18 @1k
See All Switches and Multiplexers (Mid and High Voltage) (299)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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