Texas Instruments Low Voltage Zero-Drift Precision Instrumentation Amplifier
Texas Instruments low voltage zero-drift precision instrumentation amplifier with RFI filtered inputs, rail-to-rail output and 1.8V to 5.5V supply.
The Texas Instruments Low Voltage Zero-Drift Precision Instrumentation Amplifier offers a user-configurable gain from 1 to 1000, set by a single external resistor. It is a low-power, high-precision instrumentation amplifier designed for exceptional accuracy in demanding applications. Its three-operational-amplifier design, compact form factor and minimal power consumption make it well suited to portable and battery-powered systems.
Gain and Accuracy
The gain follows the industry-standard equation G = 1 + (100kΩ/RG), allowing precise signal conditioning across a broad range of input levels. The amplifier delivers a very low input offset voltage of 25µV (at G ≥ 100), an offset voltage drift of 0.1µV/°C (at G ≥ 100) and a common-mode rejection ratio (CMRR) of 100dB (at G ≥ 10).
Key Features
- Zero-drift architecture with auto-calibration
- Noise density of 50nV/√Hz (at G ≥ 100), extending down to DC
- RFI filtered inputs for electrically noisy environments
- Rail-to-rail output
- Surface-mount VSSOP package
- Free from antimony and brominated flame retardants (No Sb/Br)
Power and Operation
The amplifier operates from a supply voltage range of 1.8V to 5.5V (±0.9V) with a quiescent current of only 50µA, which helps to maximise battery life. Auto-calibration maintains precision across the industrial temperature range of -40°C to 125°C.
Physical Details
- Weight: 0.198 g
- Width: 3.3
- Depth: 1.5
- Height: 4.3
Applications
Suitable for audio signal conditioning, sensing and instrumentation systems, medical diagnostic equipment, portable measurement devices and general test and measurement apparatus. Its combination of precision, low power consumption and compact VSSOP packaging makes it a practical choice for accurate signal measurement in these applications.
- For audio signal conditioning
- For sensing and instrumentation systems
- For medical diagnostic equipment
- For portable measurement devices
- Weight: 0.198 g
- Width: 3.3
- Depth: 1.5
- Height: 4.3
- Supply Voltage: 1.8V to 5.5V (±0.9V)
- Quiescent Current: 50µA
- Input Offset Voltage: 25µV (at G ≥ 100)
- Offset Voltage Drift: 0.1µV/°C (at G ≥ 100)
- Common-Mode Rejection Ratio: 100dB (at G ≥ 10)
- Noise Density: 50nV/√Hz (at G ≥ 100)
- Operating Temperature Range: -40°C to 125°C
- Gain Range: 1 to 1000, set by a single external resistor
- Output: Rail-to-rail
- Package: Surface-mount VSSOP
- Special Feature: Zero-drift architecture with auto-calibration
- Special Feature: RFI filtered inputs
- Special Feature: Free from antimony and brominated flame retardants
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