Overview
The INA126EA/2K5G4, produced by Texas Instruments, is a precision instrumentation amplifier designed for accurate, low-noise differential-signal acquisition. This device is part of the INAx126 family, which includes both single-channel (INA126) and dual-channel (INA2126) versions. The INA126EA/2K5G4 is particularly noted for its low quiescent current, wide supply range, and excellent performance in low-power, portable instrumentation and data acquisition systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Quiescent Current | 175 | μA/channel |
| Supply Range | ±1.35 V to ±18 V | V |
| Offset Voltage | 250 | μV (maximum) |
| Offset Voltage Drift | 3 | μV/°C (maximum) |
| Noise | 35 | nV/√Hz |
| Input Bias Current | 25 | nA (maximum) |
| Temperature Range | –40°C to +85°C | °C |
| Package | 8-pin VSSOP (DGK) | |
| Gain Range | 5 to 10000 | V/V |
| Common-Mode Rejection Ratio (CMRR) | 83 to 94 dB | dB |
| Input Impedance | 10^9 || 4 pF | Ω || pF |
Key Features
- Low quiescent current: 175 μA/channel, making it suitable for low-power applications.
- Wide supply range: ±1.35 V to ±18 V, providing flexibility in system design.
- Low offset voltage: 250 μV maximum, and low offset voltage drift: 3 μV/°C maximum, ensuring high accuracy.
- Low noise: 35 nV/√Hz, which is crucial for precise signal acquisition.
- Low input bias current: 25 nA maximum, reducing the impact on the input signal.
- High input impedance: Approximately 10^9 Ω || 4 pF, minimizing the loading effect on the input signal.
- Multiple package options: Available in 8-pin PDIP, SOIC, and VSSOP packages.
- Gain adjustable: Gain can be set from 5 V/V to 10000 V/V with a single external resistor.
Applications
- Level transmitter
- Flow transmitter
- Multiparameter patient monitor
- Mixed module (AI, AO, DI, DO)
- AC charging (pile) station
- Infusion pump
- Electrocardiogram (ECG)
Q & A
- What is the quiescent current of the INA126EA/2K5G4? The quiescent current is 175 μA/channel.
- What is the supply voltage range for the INA126EA/2K5G4? The supply voltage range is ±1.35 V to ±18 V.
- What is the maximum offset voltage of the INA126EA/2K5G4? The maximum offset voltage is 250 μV.
- How does the offset voltage drift with temperature? The offset voltage drift is 3 μV/°C maximum.
- What is the noise level of the INA126EA/2K5G4? The noise level is 35 nV/√Hz.
- What is the input bias current of the INA126EA/2K5G4? The input bias current is 25 nA maximum.
- What is the operating temperature range of the INA126EA/2K5G4? The operating temperature range is –40°C to +85°C.
- In what packages is the INA126EA/2K5G4 available? It is available in 8-pin PDIP, SOIC, and VSSOP packages.
- How can the gain of the INA126EA/2K5G4 be adjusted? The gain can be adjusted from 5 V/V to 10000 V/V with a single external resistor.
- What are some common applications of the INA126EA/2K5G4? Common applications include level transmitters, flow transmitters, multiparameter patient monitors, and electrocardiograms (ECGs).
