Overview
The INA2132U/2K5 is a dual, low-power, unity-gain difference amplifier produced by Texas Instruments. This component is designed to offer excellent performance at a very low cost, making it a valuable choice for various applications. Each channel of the INA2132 consists of a precision op amp with a precision resistor network, ensuring high accuracy and common-mode rejection over temperature. The device is available in an SO-14 surface-mount package and is specified for operation over the extended industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Offset Voltage | RTO Initial | ±150 | ±500 | ±750 | µV |
| Input Voltage Range | Common-Mode Voltage Range | –2.5 | +5.5 | V | |
| Common-Mode Rejection (CMRR) | VCM = –2.5V to +5.5V, RS = 0Ω | 80 | 90 | 74 | dB |
| Output Voltage, Positive | RL = 100kΩ to Ground | (V+) –1 | (V+) –0.75 | V | |
| Output Voltage, Negative | RL = 100kΩ to Ground | +0.25 | +0.06 | V | |
| Power Supply Rated Voltage | +5 | V | |||
| Power Supply Voltage Range | +2.7 | +36 | V | ||
| Quiescent Current (IQ) | IO = 0mA | ±155 | ±185 | µA |
Key Features
- Low power consumption with quiescent current of ±155µA to ±185µA.
- Unity-gain difference amplifier with high accuracy and common-mode rejection.
- Operates from single (+2.7V to +36V) or dual (±1.35V to ±18V) power supplies.
- Linear common-mode range extends to twice the negative power supply voltage and nearly twice the positive power supply voltage.
- No output phase reversal when inputs are overloaded to either rail.
- Stable with large capacitive loads, including a 10nF load.
- Laser-trimmed for low offset voltage and drift.
- Two completely independent channels with all bias circuitry separate.
Applications
- Differential input amplifier.
- Instrumentation amplifier building block.
- Unity-gain inverting amplifier.
- G = 1/2 amplifier.
- G = 2 amplifier.
- Summing amplifier.
- Differential current receiver.
- Voltage-controlled current source.
- Battery-powered systems.
- Ground loop eliminator.
Q & A
- What is the INA2132U/2K5 used for? The INA2132U/2K5 is a dual, low-power, unity-gain difference amplifier used in various applications such as differential input amplifiers, instrumentation amplifier building blocks, and more.
- What is the operating temperature range of the INA2132U/2K5? The INA2132U/2K5 operates over the extended industrial temperature range of –40°C to +85°C.
- What is the power supply range for the INA2132U/2K5? The device operates from single (+2.7V to +36V) or dual (±1.35V to ±18V) power supplies.
- What is the common-mode rejection ratio (CMRR) of the INA2132U/2K5? The CMRR is typically 90 dB for VCM = –2.5V to +5.5V, RS = 0Ω.
- How many channels does the INA2132U/2K5 have? The INA2132U/2K5 has two completely independent channels.
- What is the quiescent current of the INA2132U/2K5? The quiescent current is ±155µA to ±185µA.
- Is the INA2132U/2K5 stable with capacitive loads? Yes, it is stable with large capacitive loads, including a 10nF load.
- How is the offset voltage adjusted in the INA2132U/2K5? The offset voltage can be adjusted using an optional circuit as shown in Figure 2 of the datasheet.
- What package type is the INA2132U/2K5 available in? The INA2132U/2K5 is available in an SO-14 surface-mount package.
- Can the INA2132U/2K5 measure differential signals beyond the power supply rails? Yes, it can accurately measure differential signals that are beyond the power supply rails.
