Overview
The PGA205AU/1K, produced by Texas Instruments, is a low-cost, general-purpose programmable-gain instrumentation amplifier. This device is part of the PGA205 series, known for its excellent accuracy and versatility. The PGA205AU/1K offers digitally selectable gains of 1, 2, 4, and 8 V/V, making it ideal for a wide range of applications including data acquisition systems, general-purpose analog boards, and medical instrumentation.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Gain | 1, 2, 4, 8 | - | - | V/V |
| Input Offset Voltage (RTI) at TA=+25°C | ±10 + 20/G | ±50 + 100/G | ±25 + 30/G | µV |
| Input Offset Voltage Drift vs Temperature | ±0.1 + 0.5/G | ±0.25 + 5/G | ±0.25 + 5/G | µV/°C |
| Input Bias Current | - | 2nA | - | nA |
| Quiescent Current | - | 5.2mA | - | mA |
| Power Supply Voltage | ±4.5 | ±15 | ±18 | V |
| Operating Temperature Range | -40 | - | +85 | °C |
| θJA (Thermal Resistance, Junction to Ambient) | - | 80 | - | °C/W |
Key Features
- Digitally programmable gain: 1, 2, 4, 8 V/V
- Low offset voltage: 50µV max
- Low offset voltage drift: 0.25µV/°C
- Low input bias current: 2nA max
- Low quiescent current: 5.2mA typ
- No logic supply required
- 16-pin plastic DIP or SOL-16 surface-mount packages
- Internal input protection and over-voltage protection
- High common-mode rejection ratio
- Low noise performance
Applications
- Data acquisition systems
- General-purpose analog boards
- Medical instrumentation
- Industrial control systems
- Sensor signal conditioning
Q & A
- What are the available gain settings for the PGA205AU/1K?
The PGA205AU/1K offers digitally selectable gains of 1, 2, 4, and 8 V/V.
- What is the typical input offset voltage of the PGA205AU/1K?
The typical input offset voltage is ±50µV.
- How is the gain selected on the PGA205AU/1K?
The gain is selected using two TTL or CMOS-compatible address lines, A0 and A1.
- What is the quiescent current of the PGA205AU/1K?
The quiescent current is typically 5.2mA.
- What are the package options for the PGA205AU/1K?
The device is available in 16-pin plastic DIP and SOL-16 surface-mount packages.
- Does the PGA205AU/1K require a separate logic supply?
No, the PGA205AU/1K does not require a separate logic supply.
- What is the operating temperature range of the PGA205AU/1K?
The operating temperature range is from -40°C to +85°C.
- How is the input bias current of the PGA205AU/1K managed?
The input bias current is typically less than ±1nA, and a path must be provided for this current.
- What is the common-mode rejection ratio of the PGA205AU/1K?
The PGA205AU/1K has a high common-mode rejection ratio, which is essential for rejecting common-mode signals.
- Is the PGA205AU/1K susceptible to electrostatic discharge (ESD)?
Yes, the PGA205AU/1K can be damaged by ESD, and appropriate handling precautions are recommended.
