MAX134

3¾ Digit DMM Circuit


Please check latest availability status for a specific part variant.

Description

The MAX133 and MAX134 are integrating A/D converters for 3¾ digit multimeters and data acquisition systems such as data loggers and weigh scales. The A/D's internal resolution is ±40,000 counts. An extra digit is supplied as a guard digit to allow autozero or tare of a 4000 count displayed reading to 1/10 of a displayed count. The conversion time is 50ms.

The MAX133 and MAX134 differ only in their microprocessor interface. The MAX133 has a 4 bit multiplexed address/data bus while the MAX134 has 3 separate address lines and a 4 bit bidirectional data bus. Both devices can be used with 4, 8, and 16 bit microprocessors.

When controlled by a microprocessor, the MAX133 and MAX134 can perform auto-ranging measurements from ±400.0mV to ±4000V full scale. External attenuator resistors are required, but range switching is performed by the A/D.

The power supply is typically a 9V battery or ±5V. Operating current is typically 100µA while standby current is only 25µA.
MAX133, MAX134: Pin Configuration MAX133, MAX134: Pin Configuration Enlarge+

Key Features

  • 40,000 Count Resolution
  • 0.025% Accuracy
  • 20 Conversions per Second
  • Microprocessor Interface
  • 100µA Operating Supply Current
  • Low External Component Count
  • 5µV Resolution
  • Demonstration Kit Available MAX134/DEMO

Applications/Uses

  • Data Acquisition Systems
  • Data Loggers
  • Digital Panel Meters
  • Weigh Scales
Part NumberResolution
(±Counts)
Conv. Rate
(ksps)
Data BusDiff/S.E. InputExternal VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
DNL
(±LSB)
INL
(±LSB)
Package/PinsBudgetary
Price
maxminmaxmaxSee Notes
MAX133 40000.02µP/4Diff. Only0660.216
MQFP/44
PDIP/40
PLCC/44
$14.89 @1k
MAX134 
MQFP/44
PDIP/40
PLCC/44
See All Display-Oriented ADCs (28)
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.


MAX134EVKIT: Evaluation Kit for the MAX134

Quality and Environmental Data

Request Reliability Report for: MAX134 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX134CMH+D
  • MAX134CMH+TD
  • MAX134CPL+
  • MAX134CQH+D
  • MAX134CQH+TD
  • MAX134EPL+
  • MAX134EQH+D
  • 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.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

    Related Resources


    Belle Isle 2020
    05/29/2020 - 05/31/2020, Detroit, MI
    2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

    RSVP