Overview
The INA826, produced by Texas Instruments, is a precision instrumentation amplifier designed for low power consumption and wide supply voltage range. It operates on a single supply from 3 V to 36 V or dual supplies up to ±18 V. This amplifier is notable for its extremely low power consumption of 200 µA and its ability to set any gain from 1 to 1000 using a single external resistor. The INA826 is optimized for excellent stability over temperature and offers a high common-mode rejection ratio (CMRR) of over 100 dB at gains of 10 and above, making it suitable for a variety of precision measurement applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3 | - | 36 | V |
| Dual Supply Voltage | ±1.5 | - | ±18 | V |
| Supply Current | - | 200 | - | µA |
| Gain Range | 1 | - | 1000 | - |
| Input Stage Offset Voltage (RTI) | 40 | 150 | - | µV |
| Common-Mode Rejection Ratio (CMRR) at G=10 | - | - | 100 | dB |
| Operating Temperature Range | -40 | - | 125 | °C |
| Packages | - | - | SOIC, VSSOP, WSON | - |
Key Features
- Low power consumption of 200 µA.
- Wide supply voltage range: 3 V to 36 V single supply or ±1.5 V to ±18 V dual supply.
- Gain adjustable from 1 to 1000 using a single external resistor.
- High common-mode rejection ratio (CMRR) of over 100 dB at gains of 10 and above.
- Excellent stability over temperature with low gain drift of 35 ppm/°C (maximum).
- Rail-to-rail output for low-voltage operation.
- Input protection against overvoltage up to ±40 V beyond the power supplies.
- Available in 8-pin SOIC, VSSOP, and WSON surface-mount packages.
Applications
- Analog input modules.
- Flow transmitters.
- Battery testing.
- LCD testing.
- Electrocardiogram (ECG) equipment.
- Surgical equipment.
- Process analytics (pH, gas, concentration, force, and humidity).
- Circuit breakers (ACB, MCCB, VCB).
Q & A
- What is the supply voltage range for the INA826?
The INA826 operates on a single supply from 3 V to 36 V or dual supplies up to ±18 V.
- How is the gain of the INA826 adjusted?
The gain of the INA826 can be adjusted from 1 to 1000 using a single external resistor.
- What is the common-mode rejection ratio (CMRR) of the INA826?
The CMRR of the INA826 is over 100 dB at gains of 10 and above.
- What is the operating temperature range of the INA826?
The INA826 operates over a temperature range of –40°C to +125°C.
- What packages is the INA826 available in?
The INA826 is available in 8-pin SOIC, VSSOP, and WSON surface-mount packages.
- What is the input protection feature of the INA826?
The INA826 has input protection against overvoltage up to ±40 V beyond the power supplies.
- What are some typical applications of the INA826?
The INA826 is used in analog input modules, flow transmitters, battery testing, LCD testing, ECG equipment, surgical equipment, process analytics, and circuit breakers.
- How much power does the INA826 consume?
The INA826 consumes 200 µA of supply current.
- What is the gain drift of the INA826 over temperature?
The gain drift of the INA826 is 35 ppm/°C (maximum).
- Does the INA826 have rail-to-rail output capability?
Yes, the INA826 has rail-to-rail output capability for low-voltage operation.
