Overview
The INA126E/250G4, 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 two-op-amp design of the INA126E/250G4 ensures excellent performance with a low quiescent current of 175 μA per channel. It is particularly suited for portable instrumentation and data acquisition systems due to its wide operating voltage range and low power consumption.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage Range | ±1.35 V | ±18 V | V | |
| Quiescent Current per Channel | 175 μA | 200 μA | μA | |
| Offset Voltage | ±100 μV | ±250 μV | μV | |
| Offset Voltage Drift | ±0.5 μV/°C | ±3 μV/°C | μV/°C | |
| Noise Voltage | 35 nV/√Hz | nV/√Hz | ||
| Input Bias Current | 25 nA | nA | ||
| Temperature Range | –40°C | +85°C | °C | |
| Gain Range | 5 V/V | 10000 V/V | V/V | |
| Common-Mode Rejection Ratio (CMRR) | 80 dB | 94 dB | dB |
Key Features
- Low quiescent current: 175 μA per channel
- Wide supply range: ±1.35 V to ±18 V
- Low offset voltage: 250 μV maximum
- Low offset drift: 3 μV/°C maximum
- Low noise: 35 nV/√Hz
- Low input bias current: 25 nA maximum
- Temperature range: –40°C to +85°C
- Multiple package options:
- Single channel: PDIP (P), SOIC (D), VSSOP (DGK)
- Dual channels: PDIP (N), SOIC (D), SSOP (DBQ)
- Gain adjustable from 5 V/V to 10000 V/V with a single external resistor
- Excellent common-mode rejection ratio (CMRR)
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 INA126E/250G4?
The quiescent current of the INA126E/250G4 is 175 μA per channel.
- What is the supply voltage range of the INA126E/250G4?
The supply voltage range is ±1.35 V to ±18 V.
- What is the maximum offset voltage of the INA126E/250G4?
The maximum offset voltage is 250 μV.
- How does the gain of the INA126E/250G4 get adjusted?
The gain can be adjusted from 5 V/V to 10000 V/V with a single external resistor.
- What is the temperature range for the INA126E/250G4?
The temperature range is –40°C to +85°C.
- What are the package options available for the INA126?
The package options include PDIP (P), SOIC (D), and VSSOP (DGK) for single-channel versions.
- What is the common-mode rejection ratio (CMRR) of the INA126E/250G4?
The CMRR ranges from 80 dB to 94 dB depending on the configuration.
- What are some typical applications of the INA126E/250G4?
Typical applications include level transmitters, flow transmitters, multiparameter patient monitors, and electrocardiograms (ECG).
- How much noise does the INA126E/250G4 generate?
The noise voltage is 35 nV/√Hz.
- What is the input bias current of the INA126E/250G4?
The input bias current is 25 nA maximum.
