The MAX1496EAI+ is a 3.5 digit, (±1999 count) single chip analogue to digital converter (ADC) with LED driver in 28 pin SSOP package. This low power ADC with integrated LED driver operates from single 2.7V to 5.25V power supply. It includes an internal reference, high accuracy on-chip oscillator and multiplexed LED display driver. An internal charge pump generates negative supply needed to power the integrated input buffers for single supply operation. The ADC is configurable for either ±2V or ±200mV input range and it outputs its conversion results to an LED. The MAX1496 does not require external precision integrating capacitors, autozero capacitors, crystal oscillators, charge pumps or other circuitry required with dual slope ADC. This device also has on-chip buffers for the differential signal and reference input allowing direct interface with high impedance signal sources. The MAX1496 is used in digital panel meters, hand held meters, digital voltmeters and digital multimeters.
- Conversion rate of 5Hz
- Operating temperature range from -40°C to 85°C
- Sigma-delta ADC architecture, automatic offset calibration
- Integrating capacitors and autozeroing capacitors are not required
- CMRR of 100dB (At DC ) and power supply rejection (VDD) of 80dB
- Selectable voltage reference (internal 2.048V or external)
- Internal high accuracy oscillator needs no external components
- Integral nonlinearity (INL) of ±1 counts (200mV range)
- Gain error of ±0.5% FSR, offset drift of 0.1μV/°C and gain drift of ±1ppm/°C
- Overrange/underrange detection, data hold and peak detection
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