MAX133
PRODUCTION3¾ Digit DMM Circuit
- Part Models
- 6
- 1ku List Price
- Starting From $17.74
Part Details
- 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
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.
Applications
- Data Acquisition Systems
- Data Loggers
- Digital Panel Meters
- Weigh Scales
Documentation
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
---|---|---|---|
MAX133CMH+D | 44-MQFP-10X10X2(+3.2) | ||
MAX133CMH+TD | 44-MQFP-10X10X2(+3.2) | ||
MAX133CPL+ | 40-PDIP-600_MIL | ||
MAX133CQH+D | Plastic Leaded Chip Carrier | ||
MAX133CQH+TD | Plastic Leaded Chip Carrier | ||
MAX133EPL+ | 40-PDIP-600_MIL |
This is the most up-to-date revision of the Data Sheet.