Overview
The INA333AIDGKT, produced by Texas Instruments, is a low-power, zero-drift, precision instrumentation amplifier. It is designed to offer excellent accuracy and is ideal for a wide range of portable applications due to its versatile three-operational amplifier design, small size, and low power consumption. The device operates with power supplies as low as 1.8 V and has a quiescent current of only 50 µA, making it suitable for battery-operated systems. The INA333AIDGKT uses autocalibration techniques to ensure excellent precision over an extended industrial temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Low Offset Voltage | 25 µV (Maximum), G ≥ 100 | µV |
| Low Drift | 0.1 µV/°C, G ≥ 100 | µV/°C |
| Low Noise | 50 nV/√Hz, G ≥ 100 | nV/√Hz |
| High CMRR | 100 dB (Minimum), G ≥ 10 | dB |
| Low Input Bias Current | 200 pA (Maximum) | pA |
| Supply Range | 1.8 V to 5.5 V | V |
| Input Voltage | (V–) +0.1 V to (V+) –0.1 V | V |
| Output Range | (V–) +0.05 V to (V+) –0.05 V | V |
| Low Quiescent Current | 50 µA | µA |
| Operating Temperature | –40°C to +125°C | °C |
| Package Options | 8-Pin VSSOP and 8-Pin WSON |
Key Features
- Low offset voltage and drift, ensuring high precision over temperature.
- High common-mode rejection ratio (CMRR) of 100 dB at G ≥ 10.
- Low noise density of 50 nV/√Hz, extending down to DC.
- RFI filtered inputs for improved signal integrity.
- Single external resistor sets gain from 1 to 1000 using the industry-standard gain equation: G = 1 + (100 kΩ / RG).
- Low power consumption with a quiescent current of 50 µA, suitable for battery-operated systems.
- Available in 8-pin VSSOP and WSON surface-mount packages.
Applications
- Bridge Amplifiers
- ECG Amplifiers
- Pressure Sensors
- Medical Instrumentation
- Portable Instrumentation
- Weigh Scales
- Thermocouple Amplifiers
- RTD Sensor Amplifiers
- Data Acquisition Systems
Q & A
- What is the minimum power supply voltage for the INA333AIDGKT?
The minimum power supply voltage is 1.8 V.
- What is the maximum gain that can be set using the external resistor?
The gain can be set from 1 to 1000 using the industry-standard gain equation: G = 1 + (100 kΩ / RG).
- What is the typical quiescent current of the INA333AIDGKT?
The typical quiescent current is 50 µA.
- What is the operating temperature range of the INA333AIDGKT?
The operating temperature range is –40°C to +125°C.
- What are the package options available for the INA333AIDGKT?
The device is available in 8-pin VSSOP and 8-pin WSON surface-mount packages.
- What is the common-mode rejection ratio (CMRR) of the INA333AIDGKT?
The CMRR is 100 dB (Minimum) at G ≥ 10.
- How does the INA333AIDGKT achieve low noise density?
The device uses autocalibration techniques to ensure excellent precision and offers exceptionally low noise density of 50 nV/√Hz that extends down to DC.
- What are some typical applications of the INA333AIDGKT?
Typical 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 INA333AIDGKT have RFI filtered inputs?
Yes, the device has RFI filtered inputs to improve signal integrity.
- What is the bandwidth of the INA333AIDGKT at different gain settings?
The bandwidth varies with gain: 150 kHz at G = 1, 35 kHz at G = 10, 3.5 kHz at G = 100, and 350 Hz at G = 1000.
