Overview
The INA143UA/2K5, produced by Texas Instruments, is a high-speed, precision difference amplifier. This component is part of the INA143 series, which includes both single (INA143) and dual (INA2143) versions. The INA143UA/2K5 is specifically packaged in an SO-8 surface mount configuration and is available in tape and reel format, containing 2500 devices per reel.
The device features a precision op-amp with a precision resistor network, offering gains of 10V/V or 0.1V/V. The on-chip resistors are laser trimmed to ensure accurate gain and high common-mode rejection. It operates over a wide supply range, from ±2.25V to ±18V for dual supplies and +4.5V to +36V for single supply, and supports an extended industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage Range (Dual) | ±2.25 | ±18 | V | |
| Supply Voltage Range (Single) | +4.5 | +36 | V | |
| Quiescent Current (per amplifier) | ±0.92 | ±1.2 | mA | |
| Temperature Range (Specification) | –40 | +85 | °C | |
| Temperature Range (Operation) | –55 | +125 | °C | |
| Slew Rate | 5 | V/µs | ||
| Settling Time (0.1% VO = 10V Step, CL = 100pF) | 6 | µs | ||
| Common-Mode Rejection Ratio | 86 | 96 | dB | |
| Gain Error (VO = –4V to +3.5V) | ±0.01 | ±0.05 | ±0.1 | % |
Key Features
- High slew rate of 5 V/µs and fast settling time of 6 µs for 0.1% of a 10V step.
- Precision resistor network with laser-trimmed resistors for accurate gain and high common-mode rejection.
- Wide supply range: ±2.25V to ±18V for dual supplies and +4.5V to +36V for single supply.
- Extended industrial temperature range of –40°C to +85°C and operation range of –55°C to +125°C.
- Low quiescent current of ±0.92 mA to ±1.2 mA per amplifier.
- High common-mode rejection ratio of 86 dB to 96 dB.
- Low gain error and nonlinearity, making it suitable for precise signal amplification.
Applications
The INA143UA/2K5 is suitable for a wide range of general-purpose applications, including:
- Differential signal amplification in industrial and automotive systems.
- Current and voltage sensing in various industrial and medical devices.
- Battery-powered systems requiring low power consumption and high precision.
- Low-cost automotive systems where precision and reliability are crucial.
- Any application requiring high-speed, high-precision difference amplification.
The device is particularly useful in configurations where the input and feedback resistors can be reversed to achieve different gain settings (e.g., G = 10 or G = 0.1).
Q & A
- What is the gain of the INA143UA/2K5?
The INA143UA/2K5 offers gains of 10V/V or 0.1V/V.
- What is the operating temperature range of the INA143UA/2K5?
The device operates over an extended industrial temperature range of –40°C to +85°C and can function from –55°C to +125°C.
- What is the supply voltage range for the INA143UA/2K5?
The device can operate from ±2.25V to ±18V for dual supplies and from +4.5V to +36V for single supply.
- What is the slew rate of the INA143UA/2K5?
The slew rate is 5 V/µs.
- How is the common-mode rejection ratio of the INA143UA/2K5?
The common-mode rejection ratio is between 86 dB and 96 dB.
- What is the quiescent current of the INA143UA/2K5?
The quiescent current is ±0.92 mA to ±1.2 mA per amplifier.
- What package type and configuration does the INA143UA/2K5 come in?
The device is packaged in an SO-8 surface mount configuration and is available in tape and reel format.
- How does the INA143UA/2K5 handle source impedance mismatches?
For good common-mode rejection, the source impedances connected to the inputs must be nearly equal. An additional resistor in series with the opposite input can be used to preserve good common-mode rejection if there is a known impedance mismatch.
- What are some typical applications of the INA143UA/2K5?
Typical applications include differential signal amplification, current and voltage sensing, battery-powered systems, and low-cost automotive systems.
- How can the gain of the INA143UA/2K5 be adjusted?
The gain can be adjusted by reversing the input and feedback resistors to achieve different gain settings (e.g., G = 10 or G = 0.1).
