Update: 28 September, 2023
The MAX1492/MAX1494 are low-power, 3.5- and 4.5-digit analog-to-digital converters (ADCs) with integrated liquid crystal display (LCD) drivers that operate from a single 2.7V to 5.25V power supply. They include an internal reference, a high-accuracy on-chip oscillator, and a triplexed LCD driver. An internal charge pump generates the negative supply needed for single-supply operation. The ADC can be configured for either a ±2V or ±200mV input range and outputs its conversion results to an LCD and/or to a microcontroller (µC). µC communication is facilitated through an SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The MAX1492 is a 3.5-digit (±1999 count) device, and the MAX1494 is a 4.5-digit (±19,999 count) device. The MAX1492/MAX1494 do not require external precision integrating capacitors, autozero capacitors, crystal oscillators, charge pumps, or other circuitry required with dual-slope ADCs commonly used in panel meter circuits. These devices also feature on-chip buffers for the differential signal and reference inputs, allowing direct interface with high-impedance signal sources. In addition, they use continuous internal-offset calibration and offer >100dB simultaneous rejection of 50Hz and 60Hz line noise. Other features include data hold and peak hold, overrange and underrange detection, and a low-battery monitor.
File format: PDF
Size: -
MD5 Checksum: 5CCF903256D2CBE246AD2A6EB7A65E8D
Publication date: 11 April, 2012
Downloads: -
PDF Link: MAXIM MAX1492/MAX1494 Manual PDF