Overview
The INA333AIDRGR is a low-power, precision instrumentation amplifier produced by Texas Instruments. This device is designed with a versatile three-operational-amplifier architecture, making it ideal for a wide range of portable and industrial applications. It offers excellent accuracy, low power consumption, and a small footprint, making it suitable for battery-operated systems and other applications where precision and low power are critical.
The INA333AIDRGR operates with power supplies as low as 1.8 V and up to 5.5 V, with a quiescent current of only 50 µA. It features auto-calibration techniques to ensure high precision over an extended industrial temperature range of -40°C to +125°C. The device is available in both 8-pin VSSOP and WSON surface-mount packages.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Input Offset Voltage | 25 µV | - |
| Offset Voltage Drift | 0.1 µV/°C | - |
| Noise Density | 50 nV/√Hz | - |
| Common-Mode Rejection Ratio (CMRR) | 100 dB (Minimum), G ≥ 10 | - |
| Input Bias Current | 200 pA (Maximum) | - |
| Supply Range | 1.8 V to 5.5 V | - |
| Input Voltage Range | (V-) +0.1 V to (V+) -0.1 V | - |
| Output Range | (V-) +0.05 V to (V+) -0.05 V | - |
| Quiescent Current | 50 µA | - |
| Operating Temperature Range | -40°C to +125°C | - |
| Package Type | 8-Pin VSSOP, 8-Pin WSON | - |
| Bandwidth (3dB) | 150 kHz (G = 1), 35 kHz (G = 10), 3.5 kHz (G = 100), 350 Hz (G = 1000) | - |
| Slew Rate | 0.16 V/μs (G = 1), 0.05 V/μs (G = 100) | - |
Key Features
- Low Offset Voltage: Maximum of 25 µV, especially at gains ≥ 100.
- Low Drift: 0.1 µV/°C at gains ≥ 100.
- Low Noise: 50 nV/√Hz at gains ≥ 100.
- High CMRR: Minimum of 100 dB at gains ≥ 10.
- Low Input Bias Current: Maximum of 200 pA.
- Wide Supply Range: Operates from 1.8 V to 5.5 V.
- Low Quiescent Current: 50 µA, making it suitable for battery-operated systems.
- RFI Filtered Inputs: Reduces radio-frequency interference.
- Adjustable Gain: Gain can be set from 1 to 1000 using a single external resistor.
- Compact Packages: Available in 8-pin VSSOP and WSON surface-mount packages.
Applications
- Bridge Amplifiers: For strain gauge and bridge transducer applications.
- ECG Amplifiers: For electrocardiogram measurements.
- Pressure Sensors: For converting pressure into electrical signals.
- Medical Instrumentation: For various medical diagnostic and monitoring devices.
- Portable Instrumentation: Ideal for handheld and battery-powered instruments.
- Weigh Scales: For precision weight measurement systems.
- Thermocouple Amplifiers: For temperature measurement using thermocouples.
- RTD Sensor Amplifiers: For resistance temperature detector applications.
- Data Acquisition: For precision data acquisition systems.
Q & A
- What is the maximum input offset voltage of the INA333AIDRGR?
The maximum input offset voltage is 25 µV, especially at gains ≥ 100.
- What is the operating temperature range of the INA333AIDRGR?
The operating temperature range is -40°C to +125°C.
- How is the gain of the INA333AIDRGR set?
The gain can be set from 1 to 1000 using a single external resistor, RG, connected between pins 1 and 8, following the equation G = 1 + (100 kΩ / RG).
- What is the quiescent current of the INA333AIDRGR?
The quiescent current is 50 µA.
- What are the available package types for the INA333AIDRGR?
The device is available in both 8-pin VSSOP and WSON surface-mount packages.
- What is the common-mode rejection ratio (CMRR) of the INA333AIDRGR?
The CMRR is a minimum of 100 dB at gains ≥ 10.
- What is the noise density of the INA333AIDRGR?
The noise density is 50 nV/√Hz at gains ≥ 100.
- Can the INA333AIDRGR be used in battery-operated systems?
Yes, it is suitable for battery-operated systems due to its low quiescent current of 50 µA and wide supply range from 1.8 V to 5.5 V.
- What are some common applications of the INA333AIDRGR?
Common applications include bridge amplifiers, ECG amplifiers, pressure sensors, medical instrumentation, portable instrumentation, weigh scales, thermocouple amplifiers, RTD sensor amplifiers, and data acquisition systems.
- Does the INA333AIDRGR have RFI filtered inputs?
Yes, the INA333AIDRGR has RFI filtered inputs to reduce radio-frequency interference).
