CMOS High-Speed, 8-Bit ADCs with Multiplexer and Reference

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The MAX154/MAX158 are high-speed multi-channel analog-to-digital converters (ADCs). The MAX154 has four analog input channels while the MAX158 has eight channels. Conversion time for both devices is 2.5µs. The MAX154/MAX158 also feature a 2.5V on-chip reference, forming a complete high-speed data acquisition system.

Both converters include a built-in track/hold, eliminating the need for an external track/hold. The analog input range is 0V to +5V, although the ADC operates from a single +5V supply.

Microprocessor interfaces are simplified by the ADC's ability to appear as a memory location or I/O port without the need for external logic. The data outputs use latched, three-state buffer circuitry to allow direct connection to a microprocessor data bus or system input port.
MAX154, MAX158: Functional Diagram MAX154, MAX158: Functional Diagram Enlarge+

Key Features

  • One-Chip Data Acquisition System
  • Four or Eight Analog Input Channels
  • 2.5µs per Channel Conversion Time
  • Internal 2.5V Reference
  • Built-In Track/Hold Function
  • ½ LSB Error Specification
  • Single +5V Supply Operation
  • No External Clock
  • New Space-Saving SSOP Package


  • Audio Instrumentation
  • Digital Signal Processing (DSP)
  • High-Speed Data Acquisition
  • High-Speed Servo Control
  • Telecommunications

See parametric specs for Precision ADCs (< 5Msps) (437)

Part NumberResolution
Input Chan.Conv. Rate
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
External VREF
External VREF
Unipolar VIN
ADCmaxnominalminmaxmaxSee Notes
MAX154 84400SARµP/8S.E. Only2.5055
SOIC (W)/24
$5.20 @1k
MAX158 8
SOIC (W)/28
$14.32 @1k

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.
Product Reliability Reports: MAX154.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

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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