PGA308中文资料具有可编程增益和偏移的单电源自动置零传感器放大器数据手册TI规格书

描述 Description

The PGA308 is a programmable analog sensor signal conditioner. The analog signal path amplifies the sensor signal and provides digital calibration for offset and gain. Calibration is done via the 1W pin, a digital One-Wire, UART-compatible interface. For three-terminal sensor modules, 1W may be connected to VOUT and the assembly programmed through the VOUT pin. Gain and offset calibration parameters are stored onboard in seven banks of one-time programmable (OTP) memory. The power-on reset (POR) OTP bank may be programmed a total of four times. The all-analog signal path contains a 2×2 input multiplexer (mux) to allow electronic sensor lead swapping, a coarse offset adjust, an auto-zero programmable gain instrumentation amplifier (PGA), a fine gain adjust, a fine offset adjust, and a programmable gain output amplifier. Fault monitor circuitry detects and signals sensor burnout, overload, and system fault conditions. Over/under-scale limits provide additional means for system level diagnostics. The dual-use DOUT/VCLAMP pin can be used as a programmable digital output or as a VOUT over-voltage clamp. For detailed application information, see the PGA308 User's Guide (SBOU069) available for download at www.ti.com.

特性 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