Overview
The PGA308AIDRKT, produced by Texas Instruments, is a programmable analog sensor signal conditioner designed to amplify and condition sensor signals. It features a comprehensive set of functionalities including digital calibration for offset and gain, making it highly versatile for various sensor applications. The device operates on a single supply voltage ranging from +2.7V to +5.5V and is available in MSOP-10 and 3mm × 4mm DFN-10 packages. The PGA308AIDRKT is particularly useful for bridge sensors, offering features such as bridge fault monitoring, input multiplexing for lead swapping, and over/under-scale limits for system diagnostics.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage (VS) | 2.7 | 5.5 | V | ||
| Operating Temperature Range | -40 | 125 | °C | ||
| Input Current (VIN1, VIN2) | -10 | 10 | mA | ||
| Input Bias Current | ±0.3 | ±1.5 | nA | ||
| Input Impedance: Differential | 30 ∥6 | GΩ∥pF | |||
| Input Impedance: Common-Mode | 50 ∥20 | GΩ∥pF | |||
| Output Voltage Range | 0.1 VS - 0.1 | V | |||
| Quiescent Current (IQ) | VS = +5V | 1.3 | 1.6 | mA | |
| Shutdown Supply Current (ISHDN) | VS = +5V | 260 | μA | ||
| ESD Ratings (Human Body Model) | 2000 | V |
Key Features
- Digital Calibration for Bridge Sensors
- Offset Select: Coarse and Fine
- Gain Select: Coarse and Fine
- Bridge Fault Monitor
- Input Mux for Lead Swap
- Over/Under Scale Limits
- DOUT/VOUT Clamp Function
- Seven Banks OTP Memory
- One-Wire Digital UART Interface
- Operating Voltage: +2.7V to +5.5V
- Temperature Range: –40°C to +125°C
- MSOP-10 and 3mm × 4mm DFN-10 Packages
Applications
The PGA308AIDRKT is suitable for a wide range of applications involving sensor signal conditioning, particularly in industrial, automotive, and medical devices. It is ideal for use with bridge sensors, such as those found in pressure sensors, load cells, and strain gauges. The device's ability to perform digital calibration and its robust fault monitoring capabilities make it a reliable choice for critical sensing applications.
Q & A
- What is the operating voltage range of the PGA308AIDRKT?
The PGA308AIDRKT operates on a single supply voltage ranging from +2.7V to +5.5V.
- What types of calibration does the PGA308AIDRKT support?
The PGA308AIDRKT supports digital calibration for both offset and gain, which can be performed via the One-Wire, UART-compatible interface.
- What is the purpose of the One-Wire interface on the PGA308AIDRKT?
The One-Wire interface is used for digital calibration and can be connected to VOUT for programming a three-terminal sensor assembly.
- How many banks of OTP memory does the PGA308AIDRKT have?
The PGA308AIDRKT has seven banks of one-time programmable (OTP) memory for storing gain and offset calibration parameters.
- What is the temperature range for the PGA308AIDRKT?
The specified performance temperature range is –40°C to +125°C, with an operational-degraded performance range up to +150°C.
- What types of fault monitoring does the PGA308AIDRKT support?
The PGA308AIDRKT includes fault monitor circuitry that detects and signals sensor burnout, overload, and system fault conditions.
- Can the PGA308AIDRKT be used with different types of sensor configurations?
Yes, the PGA308AIDRKT includes an input multiplexer that allows for electronic sensor lead swapping, making it versatile for different sensor configurations.
- How does the PGA308AIDRKT handle over/under-scale limits?
The PGA308AIDRKT provides over/under-scale limits that can be set through the CFG1 register, offering additional means for system-level diagnostics.
- What is the purpose of the DOUT/VOUT Clamp Function?
The DOUT/VOUT Clamp Function can be used as a programmable digital output or as a VOUT over-voltage clamp, adding flexibility to the device's output configuration.
- What are the package options for the PGA308AIDRKT?
The PGA308AIDRKT is available in MSOP-10 and 3mm × 4mm DFN-10 packages.
