Packaging information
| Package | Pins VQFN (RHH) | 36 |
| Operating temperature range (°C) -40 to 150 |
| Package qty | Carrier 2,500 | LARGE T&R |
Features for the PGA900
- High accuracy, low noise, low power, small size resistive sensing signal conditioner
- User-programmable temperature and nonlinearity compensation
- On-chip ARM® Cortex® M0 microprocessor allows users to develop and implement calibration software
- One-wire interface enables the communication through power supply pin without using additional lines
- On-chip power management accepts wide power supply voltage from 3.3 V to 30 V
- Operating temperature range: –40°C to +150°C
- Memory:
- 8-kB software memory
- 128 bytes EEPROM
- 1-kB data SRAM
- Accommodates sensor sensitivities from 1 mV/V to 135 mV/V
- Two individual analog-front end (AFE) chains, each
including:
- Low-noise programmable gain amplifier
- 24-bit sigma-delta analog-to-digital converter
- Built-in internal temperature sensor with option to use external temperature sensor
- 14-bit DAC with programmable gain amplifier
- Output options:
- Ratiometric and absolute voltage output
- 4- to 20-mA current loop interface
- One-wire interface (OWI) over power line
- PWM output
- Serial peripheral interface (SPI)
- Inter-integrated circuit (I2C)
- Depletion MOSFET gate driver
- Diagnostic functions
Description for the PGA900
The PGA900 is a signal conditioner for resistive sensing applications. It can accommodate various sensing element types. The PGA900 conditions its input signals by amplification and digitization through two analog front end channels. With the user programmed software in the on-chip ARM Cortex M0 processor, the PGA900 can perform linearization, temperature compensation, and other user defined compensation algorithms. The conditioned signal can be output as ratiometric voltage, absolute voltage, 4- to 20-mA current loop or PWM. The data and configuration registers can also be accessed through SPI, I2C, UART, and two GPIO ports. In addition, the unique OWI allows communication and configuration through the power supply pin without using additional lines. The PGA900 operating voltage is from 3.3 V to 30 V and it can operate in temperatures from –40°C to +150°C.