Overview
The PGA112AIDGSTG4 is a precision programmable gain amplifier (PGA) manufactured by Texas Instruments. This device is part of the PGA112 series, known for its high precision and low noise characteristics. It is designed for single-supply, single-ended applications and features a rail-to-rail input and output stage. The PGA112AIDGSTG4 is particularly suited for applications requiring high accuracy and low drift over temperature, making it ideal for various industrial, medical, and test and measurement applications.
Key Specifications
| Category | Specification |
|---|---|
| Manufacturer | Texas Instruments |
| Package / Case | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
| RoHS | RoHS Compliant |
| Slew Rate | 8 V/µs |
| Output Type | Rail-to-Rail |
| -3db Bandwidth | 10 MHz |
| Amplifier Type | Programmable Gain |
| Current - Supply | 1.1 mA (Typical) |
| Current - Input Bias | 1.5 nA |
| Operating Temperature | -40°C to 125°C |
| Voltage - Input Offset | 25 µV (Typical), 100 µV (Maximum) |
| Voltage - Supply Span (Min/Max) | 2.2 V / 5.5 V |
| Current - Output / Channel | 60 mA |
| Gain Error | 0.1% Maximum (G ≤ 32), 0.3% Maximum (G > 32) |
| Binary Gains | 1, 2, 4, 8, 16, 32, 64, 128 |
| Gain Switching Time | 200 ns |
| SPI Interface | 10 MHz with Daisy-Chain Capability |
| Shutdown Current | ≤ 4 µA (Typical) |
Key Features
- Zero-Drift and Low Noise: The PGA112AIDGSTG4 features zero-drift characteristics with a typical offset drift of 0.35 µV/°C and low noise of 12 nV/√Hz, making it highly accurate and stable over temperature.
- Programmable Gain: Offers binary gains of 1, 2, 4, 8, 16, 32, 64, and 128, and scope gains of 1, 2, 5, 10, 20, 50, 100, and 200.
- Rail-to-Rail Input and Output: Ensures maximum signal range and flexibility in various applications.
- SPI Interface: A 10 MHz SPI interface with daisy-chain capability for easy configuration and control.
- Internal Calibration Channels: Four internal calibration channels tied to GND, 0.9 V CAL, 0.1 V CAL, and V REF for system-level calibration.
- Low Power Shutdown: Software and hardware shutdown options with a current consumption of ≤ 4 µA (Typical).
- Mixed Voltage Systems: Supports AVDD and DVDD for mixed voltage systems, enhancing versatility in different application environments.
Applications
- Test and Measurement Equipment: Ideal for precision measurement instruments due to its high accuracy and low noise.
- Portable Data Acquisition Systems: Suitable for battery-powered and handheld devices requiring low power consumption and high precision.
- Medical Devices: Used in medical equipment where precise signal amplification and low drift are critical.
- Programmable Logic Controllers (PLCs): Enhances the precision and reliability of PLC systems.
- PC-Based Signal Acquisition Systems: Optimized for driving CDAC ADCs in PC-based systems.
- Battery-Powered Instruments: Low power consumption makes it suitable for battery-powered devices.
Q & A
- What is the PGA112AIDGSTG4?
The PGA112AIDGSTG4 is a precision programmable gain amplifier manufactured by Texas Instruments, known for its zero-drift and low noise characteristics.
- What are the key features of the PGA112AIDGSTG4?
Key features include zero-drift, low noise, programmable gain, rail-to-rail input and output, SPI interface, internal calibration channels, and low power shutdown.
- What are the available gain settings for the PGA112AIDGSTG4?
The device offers binary gains of 1, 2, 4, 8, 16, 32, 64, and 128, and scope gains of 1, 2, 5, 10, 20, 50, 100, and 200.
- What is the operating temperature range of the PGA112AIDGSTG4?
The operating temperature range is -40°C to 125°C.
- What is the typical supply current of the PGA112AIDGSTG4?
The typical supply current is 1.1 mA.
- Does the PGA112AIDGSTG4 support mixed voltage systems?
Yes, it supports AVDD and DVDD for mixed voltage systems.
- What is the gain switching time of the PGA112AIDGSTG4?
The gain switching time is 200 ns.
- What are the typical applications of the PGA112AIDGSTG4?
Typical applications include test and measurement equipment, portable data acquisition systems, medical devices, programmable logic controllers, and battery-powered instruments.
- How does the PGA112AIDGSTG4 handle system-level calibration?
The device provides four internal calibration channels tied to GND, 0.9 V CAL, 0.1 V CAL, and V REF for system-level calibration.
- What is the shutdown current of the PGA112AIDGSTG4?
The shutdown current is ≤ 4 µA (Typical).
