MAX1367:Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output

The MAX1365/MAX1367 low-power, 4.5- and 3.5-digit, panel meters feature an integrated sigma-delta analog-to-digital converter (ADC), LED display drivers, voltage digital-to-analog converter (DAC), and a 4–20mA (or 0 to 16mA) current driver. The MAX1365/MAX1367's analog input voltage range is programmable to either ±2V or ±200mV. The MAX1367 drives a 3.5-digit (±1999 count) display and the MAX1365 drives a 4.5-digit (±19,999 count) display. The ADC output directly drives the LED display as well as the voltage DAC, which in turn drives the 4–20mA (or 0 to 16mA) current-loop output. In normal operation, the 0 to 16mA/4–20mA current-loop output follows the ±2V or ±200mV analog input to drive remote panel-meter displays, data loggers, and other industrial controllers. For added flexibility, the MAX1365/MAX1367 allow direct access to the DAC output and the V/I converter input. The sigma-delta ADC does not require external precision integrating capacitors, autozero capacitors, crystal oscillators, charge pumps, or other circuitry commonly required in dual-slope ADC panel-meter circuits. On-chip analog input and reference buffers allow direct interface with high-impedance signal sources. Excellent common-mode rejection and digital filtering provide greater than 100dB rejection of simultaneous 50Hz and 60Hz line noise. Other features include data hold, peak detection, and overrange/underrange detection. The MAX1365/MAX1367 require a 2.7V to 5.25V supply, a 4.75V to 5.75V V/I supply, and a 7V to 30V loop supply. They are available in a space-saving (7mm x 7mm), 48-pin TQFP package and operate over the extended (-40°C to +85°C) temperature range.

Key Features
  • Stand-Alone, Digital Panel Meter 20-Bit Sigma-Delta ADC     4.5-Digit Resolution (±19,999 Count, MAX1365)     3.5-Digit Resolution (±1999 Count, MAX1367) No Integrating/Autozeroing Capacitors 100MΩ Input Impedance ±200mV or ±2.000V Input Range LED Display Common-Cathode 7-Segment LED Driver Programmable LED Current (0 to 20mA) 2.5Hz Update Rate Output DAC and Current Driver ±15-Bit DAC with 14-Bit Linear V/I Converter Selectable 0 to 16mA or 4–20mA Current Output Unipolar/Bipolar Modes ±50µA Zero Scale, ±40ppmFS/°C (typ) ±0.5% Gain Error, ±25ppmFS/°C (typ) Separate 7V to 30V Supply for Current-Loop     Output 2.7V to 5.25V ADC/DAC Supply 4.75V to 5.25V V/I Converter Supply Internal 2.048V Reference or External Reference 48-Pin, 7mm x 7mm TQFP Package
MAX1365, MAX1367: Typical Operating Circuit
MAX1365, MAX1367: Typical Operating Circuit
  • Automated Test Equipment (ATE)
  • Data Acquisition Systems
  • Digital Multimeters
  • Digital Panel Meters
  • Digital Voltmeters
  • Industrial Process Control
titleDownload file
MAX1365-MAX1367 Data SheetMAX1365-MAX1367.pdf
Part NumberResolution
Conv. Rate
Data BusDiff/S.E. InputInternal VREF
External VREF
External VREF
Bipolar VIN
maxnominalminmaxmaxSee Notes
MAX136520000.005SPIS.E. Only2.048-2.22.221LQFP/48$8.89 @500
MAX1367LQFP/48$8.89 @1k
Design kits & evaluation modules
Related Products
  • MAX1368:Microcontroller-Interface, 4.5-/3.5-Digit Panel Meters with 4-20mA Output
  • MAX1366:Microcontroller-Interface, 4.5-/3.5-Digit Panel Meters with 4-20mA Output
  • MAX1365:Stand-Alone, 4.5-/3.5-Digit Panel Meters with 4–20mA Output
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1367ECMNo Longer AvailableMAX1367ECM+LQFP;48 pin-40°C to +85°CSee data sheet
MAX1367ECM+ActiveLQFP,;48 pin;LQFP;-40°C to +85°CLead Free
MAX1367ECM+TActiveLQFP;-40°C to +85°CSee data sheet
MAX1367ECM-TNo Longer AvailableMAX1367ECM+LQFP;48 pin-40°C to +85°CSee data sheet
MAX1365-MAX1367.pdf MAX1367
Delta-Sigma ADCs Replace Integrating ADCs for Panel Meters MAX1499
MAX1365-MAX1367.pdf MAX1367