Overview
The PGA113AIDGSR is a precision programmable gain amplifier (PGA) manufactured by Texas Instruments. This device is part of the PGA113 series, which includes binary and scope gain configurations. The PGA113AIDGSR is characterized by its zero-drift, low noise, and high precision, making it suitable for a variety of analog signal processing applications. It features a 10-pin VSSOP package and includes a two-channel multiplexer (MUX), a three-pin SPI interface, and software shutdown capabilities.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Offset Voltage | 25 µV (Typical), 100 µV (Maximum) | µV |
| Zero Drift | 0.35 µV/°C (Typical), 1.2 µV/°C (Maximum) | µV/°C |
| Noise | 12 nV/√Hz | nV/√Hz |
| Input Offset Current | ±5 nA (Maximum at 25°C) | nA |
| Gain Error | 0.1% (Maximum for G ≥ 32), 0.3% (Maximum for G < 32) | % |
| Binary Gains | 1, 2, 4, 8, 16, 32, 64, 128 | - |
| Scope Gains | 1, 2, 5, 10, 20, 50, 100, 200 | - |
| Gain Switching Time | 200 ns | ns |
| MUX Channels | 2 Channels | - |
| Internal Calibration Channels | Four Channels (GND, 0.9 V CAL, 0.1 V CAL, V REF) | - |
| Output Swing | 50 mV to Supply Rails | mV |
| Supply Current | 1.1 mA (Typical) | mA |
| Shutdown Current | ≤ 4 µA (Typical) | µA |
| Temperature Range | –40°C to 125°C | °C |
| SPI Interface | 10 MHz with Daisy-Chain Capability | - |
Key Features
- Rail-to-Rail Input and Output: Ensures maximum signal range utilization.
- Low Offset and Zero Drift: 25 µV typical offset and 0.35 µV/°C typical zero drift for high precision.
- Low Noise: 12 nV/√Hz noise for sensitive signal applications.
- Programmable Gains: Binary gains (1, 2, 4, 8, 16, 32, 64, 128) and scope gains (1, 2, 5, 10, 20, 50, 100, 200).
- Fast Gain Switching: 200 ns gain switching time for rapid configuration changes.
- Two-Channel MUX: Allows selection between two analog input channels.
- Internal Calibration Channels: Four channels for system-level calibration (GND, 0.9 V CAL, 0.1 V CAL, V REF).
- Optimized for CDAC ADCs: Designed to drive Capacitor Digital-to-Analog Converters (CDAC) ADCs efficiently.
- Software and Hardware Shutdown: Low current shutdown mode (≤ 4 µA typical).
- SPI Interface with Daisy-Chain Capability: 10 MHz SPI interface for easy integration and daisy-chaining.
Applications
- Medical Devices: Suitable for medical equipment requiring high precision and low noise, such as ECG and EEG systems.
- Industrial Automation: Used in industrial control systems, sensors, and data acquisition systems.
- Aerospace and Defense: Applicable in various military and aerospace applications requiring high reliability and precision.
- Test and Measurement Equipment: Ideal for use in oscilloscopes, multimeters, and other precision measurement instruments.
- Automotive Systems: Can be used in automotive sensors and control systems that require high accuracy and reliability.
Q & A
- What is the typical offset voltage of the PGA113AIDGSR?
The typical offset voltage is 25 µV, with a maximum of 100 µV.
- What are the available gain settings for the PGA113AIDGSR?
The device offers binary gains (1, 2, 4, 8, 16, 32, 64, 128) and scope gains (1, 2, 5, 10, 20, 50, 100, 200).
- How many analog input channels does the PGA113AIDGSR have?
The PGA113AIDGSR has two analog input channels with a two-channel MUX.
- What is the gain switching time of the PGA113AIDGSR?
The gain switching time is 200 ns.
- Does the PGA113AIDGSR support shutdown modes?
Yes, it supports both software and hardware shutdown modes with a typical shutdown current of ≤ 4 µA.
- What is the temperature range of the PGA113AIDGSR?
The operating temperature range is –40°C to 125°C.
- What type of interface does the PGA113AIDGSR use for configuration?
The device uses a 10 MHz SPI interface with daisy-chain capability.
- Is the PGA113AIDGSR optimized for any specific type of ADC?
Yes, it is optimized for driving Capacitor Digital-to-Analog Converters (CDAC) ADCs.
- What is the typical supply current of the PGA113AIDGSR?
The typical supply current is 1.1 mA.
- Does the PGA113AIDGSR have internal calibration channels?
Yes, it has four internal calibration channels tied to GND, 0.9 V CAL, 0.1 V CAL, and V REF.
