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PGA900ARHHR
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Datasheet
Description
The PGA900 is a signal conditioner for resistive sensing applications. The device is available with a wide variety of sensing element types. The PGA900 amplifies and digitally conditions its input signal through two analog front-end channels. Through user-programmable software in the on-chip ARM Cortex M0 processor, the PGA900 can implement linearization, temperature compensation, and other user-defined compensation algorithms. The conditioned signal can be output as 3-wire proportional voltage, absolute voltage, 2-wire 4-20mA current loop, or PWM. The device also provides access to data and configuration registers through SPI, I2C, universal asynchronous transceiver (UART), and two general-purpose input-output (GPIO) ports. In addition, thanks to the unique OWI, the device enables single-wire communication and configuration through the power pin, eliminating the need for additional wires. The PGA900 has an operating voltage range of 3.3V to 30V and an operating temperature range of –40°C to +150°C. characteristic • High precision, low noise, low power, small size resistive sensing signal conditioner • User programmable temperature and nonlinear compensation • On-chip ARM® Cortex®M0 microprocessor allows user to develop and implement calibration software • One-wire Interface to communicate through power pins without using additional wires • On-chip power management supports wide supply voltage range from 3.3V to 30V • Operating temperature range: –40°C to +150°C • Memory: • 8kB software Memory • 128 Bytes of EEPROM • 1kB of Data SRAM • Adjustable Sensor Sensitivity from 1mV/V to 135mV/V • Two Separate Analog Front End (AFE) Chains Each Contains: • Low Noise Programmable Gain Amplifier • 24 Bit Sigma-Delta Analog-to-Digital Converter • Internal or optional external temperature sensor • 14-Bit DAC with Programmable Gain Amplifier • Output Options: • Ratiometric and Absolute Voltage Outputs • 4mA to 20mA Current Loop Interface • One-Wire Interface (OWI) over Power Line • PWM Output • Serial Peripheral Interface (SPI) • Inter-Integrated Circuit (I2C) • Depletion Mode MOSFET Gate Driver • Diagnostic Functions All the evaluation(0)
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