ADC GX7173 in Multimeter, Performance Compatible with AD7173

Digital multimeter is a multi-purpose electronic measuring instrument, divided into pointer multimeter and digital multimeter two types, it can measure DC current, DC voltage, AC current, AC voltage, resistance and audio level, mainly used in physical, electrical, electronic and other measurement fields.

The working principle of digital multimeter is mainly based on digital circuit to detect and analyze the signal, and then provide LCD display through analog-to-digital converter. Digital multimeter generally adopts LCD as the reading device, which has the characteristics of high measurement accuracy, safety and reliability.

In a high-precision digital multimeter project data processing process needs to be used in the ADC to measure the analog signal into a digital signal, due to the measurement of the application of the class of precision requirements are extremely high, GXSC to its introduction of high-precision ADC GX7173, the chip to meet the project‘s application requirements. GX7173 is a fast build, highly accurate, low-power, 8/16 channel, multiplexed The GX7173 is a fast build-up, highly accurate, low-power, 8/16-channel, multiplexed ADC that is ideally suited for low-bandwidth input signals.

GX7173 main performance:

1, GX7173 internal integration: precision analog input buffer and reference input buffer 2.5V precision reference voltage source (3.5ppm / ° C), crosspoint multiplexer, 8 fully differential or 16 single-ended channels, clock oscillator, GPIO and GPO pins for controlling the external multiplexer and so on.

2, GX7173 provides fast and flexible output rates from 1.25SPS to 31.25kSPS, channel scan data rate 6.21kSPS/channel number (build-up time: 161µs).

3, GX7173 performance specifications: 17.5-bit noise-free resolution (31.25kSPS), 24-bit noise-free resolution (1.25SPS), integral nonlinearity: ± 3ppm/FSR.

4, GX7173 operating voltage of 3.3V or 5V, the current is 4mA, and provides QFN-40 package.