Драйверы светодиодных дисплеев MAX1447ECJ+

Display Drive AD Converter , 4.5 Digits, 50 выборок/с, Дифференциальный, Параллельный

The MAX1447ECJ+ from Maxim Integrated Products is a 4.5digit, single chip ADC with LED driver in 32 pin LQFP package. It includes 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. The ADC is configurable for either a ±2V or ±200mV input range and it outputs its conversion results to an LED. The MAX1447 do not require external precision integrating capacitors, autozero capacitors, crystal oscillators, charge pumps or other circuitry required with dual-slope ADCs. It also feature on-chip buffers for differential signal and reference input allowing direct interface with high-impedance signal sources. It uses continuous internal offset-calibration and offer >100dB rejection of 50Hz and 60Hz line noise. It is used in digital panel meters, hand-held meters, digital voltmeters and digital mustimeters.

• Single 2.7V to 5.25V power supply
• High ±19,999 count resolution
• Selectable internal 2.048V or external voltage reference
• Internal high-accuracy oscillator needs no external components
• Automatic offset calibration
• Includes data hold and peak detection and overrange
• underrange detection
• Maximum 325µA shutdown current
• Multiplexed common cathode LED drivers
• On-demand enhanced offset calibration for improved offset performance

• Operating temperature range from -40°C to 85°C
• Digital Multimeters; Digital Panel Meters; Digital Voltmeters; Handheld meters

Области применения

Обработка Сигнала, Переносные Устройства, Потребительская Электроника