General Description
The MAX1447/MAX1496/MAX1498 low-power, 3.5- and 4.5-digit, analog-to-digital converters (ADCs) with integrated light-emitting diode (LED) drivers operate from a single 2.7V to 5.25V power supply. They include an internal reference, a high-accuracy on-chip oscillator, and a multiplexed LED display driver. An internal charge pump generates the negative supply needed to power the integrated input buffers for single-supply operation

Features
♦ High Resolution
   MAX1447/MAX1498: 4.5 Digits (±19,999 Count)
   MAX1496: 3.5 Digits (±1999 Count)
♦ Sigma-Delta ADC Architecture
   No Integrating Capacitors Required
   No Autozeroing Capacitors Required
   >100dB of Simultaneous 50Hz and 60Hz
   Rejection
♦ Selectable Input Range of ±200mV or ±2V
♦ Selectable Voltage Reference: Internal 2.048V or
   External
♦ Internal High-Accuracy Oscillator Needs No
   External Components
♦ Automatic Offset Calibration
♦ On-Demand Enhanced Offset Calibration
(MAX1447)
♦ Operate from a Single 2.7V to 5.25V Supply
♦ Low Power (Exclude LED-Driver Current)
   Maximum 744µA Operating Current (MAX1496)
   Maximum 960µA Operating Current
   (MAX1447/MAX1498)
   Maximum 325µA Shutdown Current
♦ Multiplexed Common-Cathode LED Drivers
   Resistor-Programmable Segment Current
♦ Small 32-Pin, 7mm x 7mm TQFP Package (4.5
   Digits), 28-Pin SSOP Package (3.5 Digits)
♦ Also Available in a PDIP Package (3.5 Digits)

Applications
   Digital Panel Meters
   Hand-Held Meters
   Digital Voltmeters
   Digital Multimeters