Overview
The INA326EA/2K5 from Texas Instruments is a high-performance, low-cost, precision instrumentation amplifier. It features rail-to-rail input and output, making it suitable for a wide range of applications from general-purpose to high-accuracy. This amplifier is designed for single-supply operation and offers excellent long-term stability and very low 1/f noise, ensuring low offset voltage and drift throughout its life.
The INA326EA/2K5 is available in an 8-pin MSOP package and is specified over the industrial temperature range of –40°C to +85°C, with operation extending up to +125°C. Its unique internal topology provides excellent Common-Mode Rejection (CMR) without being affected by resistance in the reference connections or sockets.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage, RTI (VOS) | VS = +5V, VCM = VS/2 | ±20 | ±100 | µV | |
| Over Temperature (dVOS/dT) | ±0.1 | ±0.4 | µV/°C | ||
| Power Supply Rejection (PSR) | VS = +2.7V to +5.5V, VCM = VS/2 | ±20 | ±3 | µV/V | |
| Input Impedance, Differential | 10^10 || 2 Ω || pF | ||||
| Input Impedance, Common-Mode | 10^10 || 14 Ω || pF | ||||
| Input Voltage Range | VS = +2.7V to +5.5V | ||||
| Supply Voltage Range | 2.7 V | 5.5 V | |||
| Operating Temperature | –40°C | +85°C | |||
| Current - Input Bias | 200 pA | ||||
| Current - Supply | 2.4 mA | ||||
| Current - Output / Channel | 25 mA | ||||
| -3db Bandwidth | 1 kHz | ||||
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
Key Features
- Precision low offset voltage: ±20 µV to ±100 µV over the specified temperature range.
- Excellent long-term stability and very low 1/f noise, ensuring low offset voltage and drift.
- Rail-to-rail input and output, allowing for operation beyond the positive and negative supply rails.
- High Common-Mode Rejection (CMR) that is not affected by resistance in the reference connections or sockets.
- Single-supply operation with a supply voltage range of 2.7 V to 5.5 V.
- Low input bias current of 200 pA.
- Compact 8-pin MSOP or TSSOP package.
- Operating temperature range of –40°C to +85°C, with operation up to +125°C).
Applications
- General-purpose instrumentation and measurement systems.
- High-accuracy applications requiring low offset voltage and drift.
- Medical devices and diagnostic equipment.
- Industrial control and automation systems.
- Sensor signal conditioning and amplification.
- Aerospace and defense applications requiring high reliability and precision.
Q & A
- What is the input offset voltage of the INA326EA/2K5?
The input offset voltage of the INA326EA/2K5 is ±20 µV to ±100 µV over the specified temperature range.
- What is the supply voltage range for the INA326EA/2K5?
The supply voltage range for the INA326EA/2K5 is 2.7 V to 5.5 V).
- What is the operating temperature range of the INA326EA/2K5?
The operating temperature range of the INA326EA/2K5 is –40°C to +85°C, with operation up to +125°C).
- What is the package type of the INA326EA/2K5?
The INA326EA/2K5 is available in an 8-pin MSOP or TSSOP package).
- What is the common-mode rejection ratio (CMRR) of the INA326EA/2K5?
The INA326EA/2K5 has a high CMRR that is not affected by resistance in the reference connections or sockets, but the exact CMRR value is 114 dB).
- What are the typical applications of the INA326EA/2K5?
The INA326EA/2K5 is typically used in general-purpose instrumentation, high-accuracy applications, medical devices, industrial control systems, sensor signal conditioning, and aerospace and defense applications).
- How is the gain set for the INA326EA/2K5?
The gain of the INA326EA/2K5 is set using external gain-setting resistors R1 and R2, with the overall gain described by the equation G = 2 * (R2/R1)).
- What is the input bias current of the INA326EA/2K5?
The input bias current of the INA326EA/2K5 is 200 pA).
- What is the output current capability of the INA326EA/2K5?
The output current capability of the INA326EA/2K5 is 25 mA per channel).
- Is the INA326EA/2K5 RoHS compliant?
Yes, the INA326EA/2K5 is RoHS compliant).
