GX1220 for Multiple Signal Acquisition, Compatible with ADS1220

With the development of technology, the data acquisition system is developing in the direction of high precision, high speed, stability and reliability and integration. Multi-channel signal acquisition system needs to collect multiple signals at the same time, not only can separate data acquisition, and equipment can be high-speed synchronous processing of data information, but also in the various devices to communicate with each other as well as the expansion of access to other peripherals, constituting a full-featured data acquisition system, in the system, high-precision and high-speed analog-to-digital converter is indispensable, the GX1220 analog-to-digital converter 6-channel, 24-bit, the conversion rate of GX1220 analog-to-digital converter is a 6-channel, 24-bit converter with a conversion rate of 3.7-kSPS and rich configurations, which is very suitable for the application in multi-channel model acquisition.

The GX1220 is a standard 4-wire SPI interface, which provides integrated functions such as PGA, VREF, and 2 IDACs to reduce system cost and component count. At ≤20 SPS, digital filters provide 50Hz or 60Hz suppression of noise for industrial applications. The internal PGA provides gains up to 128 V/V.

The GX1220 is ideally suited for applications that measure signals from small sensors such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistance bridge sensors. Available in lead-free QFN-16 or TSSOP-16 packages, it has a temperature range of -40°C to 125°C. The main performance parameters are described below:

- Wide power supply range: 2.7V to 5.25V

- Programmable gain: 1V/V to 128V/V

- Programmable data rate: up to 3.7kSPS

- 50Hz or 60Hz rejection at <20SPS, single-cycle settling digital filters

- Three differential or five single-ended inputs

- Internal bias voltage generator

- Dual matched programmable current sources: 10μa-1.5ma

- Internal 2.048V reference voltage: 8 ppm/°C (typical) drift

- Internal 2% accuracy oscillator Internal temperature voxel sensor