Overview
The INA2126E/250G4, produced by Texas Instruments, is a precision instrumentation amplifier designed for accurate and low-noise differential signal acquisition. This device is part of the INAx126 family, which includes both single and dual-channel versions. The INA2126E/250G4 is a dual-channel version, offering excellent performance with a very low quiescent current of 175 μA per channel. It operates over a wide supply voltage range from ±1.35 V to ±18 V, making it suitable for portable instrumentation and data acquisition systems. The two-op-amp design ensures high accuracy and low power consumption, with features such as low offset voltage, low offset drift, and excellent common-mode rejection.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±1.35 | ±18 | V | |
| Quiescent Current (per channel) | 175 | 200 | μA | |
| Offset Voltage | ±100 | ±250 | μV | |
| Offset Voltage Drift | ±0.5 | ±3 | μV/°C | |
| Input Bias Current | ±10 | ±25 | nA | |
| Input Impedance | 1 GΩ || 4 pF | |||
| Common-Mode Rejection Ratio (CMRR) | 80 | 94 | dB | |
| Bandwidth (–3 dB) | 200 kHz (G = 5) | |||
| Slew Rate | 0.4 V/μs (G = 5) | |||
| Operating Temperature Range | –40 | +85 | °C |
Key Features
- Low quiescent current: 175 μA per channel, making it suitable for battery-operated systems.
- Wide supply range: Operates from ±1.35 V to ±18 V, allowing flexibility in power supply configurations.
- Low offset voltage: Maximum of 250 μV, and low offset drift of 3 μV/°C, ensuring high accuracy.
- Low noise: 35 nV/√Hz at 1 kHz, suitable for low-noise applications.
- High input impedance: 1 GΩ || 4 pF, allowing for unbalanced output impedance from the signal source.
- Gain setting: Gain can be set from 5 V/V to 10000 V/V with a single external resistor.
- Multiple package options: Available in 16-pin PDIP, SOIC, and SSOP packages).
Applications
- Industrial sensor amplifiers: Suitable for bridge, RTD, and thermocouple sensors.
- Physiological amplifiers: Used in ECG, EEG, and EMG applications).
- Multiparameter patient monitors and mixed modules (AI, AO, DI, DO)).
- Portable, battery-operated systems: Ideal for data acquisition systems due to low power consumption).
- Flow transmitters and level transmitters).
- Infusion pumps and AC charging stations).
Q & A
- What is the quiescent current of the INA2126E/250G4?
The quiescent current is 175 μA per channel, with a maximum of 200 μA).
- What is the supply voltage range for the INA2126E/250G4?
The device operates from ±1.35 V to ±18 V).
- What is the maximum offset voltage of the INA2126E/250G4?
The maximum offset voltage is 250 μV).
- How can the gain be set for the INA2126E/250G4?
The gain can be set from 5 V/V to 10000 V/V with a single external resistor).
- What are the package options available for the INA2126E/250G4?
It is available in 16-pin PDIP, SOIC, and SSOP packages).
- What is the common-mode rejection ratio (CMRR) of the INA2126E/250G4?
The CMRR is between 80 dB and 94 dB, depending on the gain setting).
- What is the operating temperature range of the INA2126E/250G4?
The device operates from –40°C to +85°C).
- What are some typical applications of the INA2126E/250G4?
It is used in industrial sensor amplifiers, physiological amplifiers, multiparameter patient monitors, and portable data acquisition systems).
- What is the input impedance of the INA2126E/250G4?
The input impedance is 1 GΩ || 4 pF).
- What is the slew rate of the INA2126E/250G4?
The slew rate is 0.4 V/μs for a gain of 5).
