PGA309AIPWTG4集成电路（IC）的传感器检测器接口规格书PDF中文资料

PGA309AIPWTG4属于集成电路（IC）的传感器检测器接口。由美国德州仪器公司制造生产的PGA309AIPWTG4传感器和检测器接口该系列产品可执行信号调节、数据转换、激励生成和/或各种将传感器或变送器机构连接到主机设备所需的其他功能。示例包括用于 CCD 图像传感器的控制器、用于 4-20 mA 接口和类似应用的电流变送器、超声变送器前端、惠斯通电桥接口等。

1FEATURES

2• Complete Bridge Sensor Conditioner

• Voltage Output: Ratiometric or Absolute

• Digital Cal: No Potentiometers/Sensor Trims

• Sensor Error Compensation

– Span, Offset, and Temperature Drifts

• Low Error, Time-Stable

• Sensor Linearization Circuitry

• Temperature Sense: Internal or External

• Calibration Lookup Table Logic

– Uses External EEPROM (SOT23-5)

• Over/Under-Scale Limiting

• Sensor Fault Detection

• +2.7V TO +5.5V Operation

• –40°C to +125°C Operation

• Small TSSOP-16 Package

APPLICATIONS

• Bridge Sensors

• Remote 4-20mA Transmitters

• Strain, Load, and Weigh Scales

• Automotive Sensors

EVALUATION TOOLS

• Hardware Designer’s Kit (PGA309EVM)

– Temperature Eval of PGA309 + Sensor

– Full Programming of PGA309

– Sensor Compensation Analysis Tool

DESCRIPTION

The PGA309 is a programmable analog signal

conditioner designed for bridge sensors. The analog

signal path amplifies the sensor signal and provides

digital calibration for zero, span, zero drift, span drift,

and sensor linearization errors with applied stress

(pressure, strain, etc.). The calibration is done via a

One-Wire digital serial interface or through a

Two-Wire industry-standard connection. The

calibration parameters are stored in external

nonvolatile memory (typically SOT23-5) to eliminate

manual trimming and achieve long-term stability.

The all-analog signal path contains a 2x2 input

multiplexer (mux), auto-zero programmable-gain

instrumentation amplifier, linearization circuit, voltage

reference, internal oscillator, control logic, and an

output amplifier. Programmable level shifting

compensates for sensor dc offsets.

The core of the PGA309 is the precision, low-drift, no

1/f noise Front-End PGA (Programmable Gain

Amplifier). The overall gain of the Front-End PGA +

Output Amplifier can be adjusted from 2.7V/V to

1152V/V. The polarity of the inputs can be switched

through the input mux to accommodate sensors with

unknown polarity output. The Fault Monitor circuit

detects and signals sensor burnout, overload, and

system fault conditions.

For detailed application information, see the PGA309

User's Guide (SBOU024) available for download at

www.ti.com.