Overview
The INA132U/2K5 is a low-power, unity-gain differential amplifier produced by Texas Instruments. It consists of a precision op amp with a precision resistor network, where the on-chip resistors are laser trimmed for accurate gain and high common-mode rejection. This amplifier is designed to operate on either single (2.7V to 36V) or dual (±1.35V to ±18V) supplies, making it versatile for various applications. The INA132U/2K5 is particularly useful in single-supply applications due to its internal op amp’s common-mode range extending to the negative supply. It is available in an 8-pin SOIC surface-mount package and is specified for operation over the industrial temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Offset Voltage | RTO, TA = 25°C | ±75 | ±250 | ±500 | µV |
| Offset Voltage Drift | RTO, TA = –40°C to +85°C | ±1 | ±5 | ±10 | µV/°C |
| Common-Mode Rejection | VCM = 0V to 8V, RS = 0Ω | 76 | 90 | 70 | dB |
| Quiescent Current | VIN = 0V | ±175 | ±230 | µA | |
| Small Signal Bandwidth | -3dB | 300 | kHz | ||
| Slew Rate | 0.1 | V/µs | |||
| Operating Temperature Range | –40°C | +85°C | °C | ||
| Package Type | SO-8 |
Key Features
- Wide Supply Range: Single supply: 2.7V to 36V, Dual supplies: ±1.35V to ±18V.
- DC Precision Performance: Low gain error: ±0.075% (maximum), Low nonlinearity: 0.001% (maximum), High common-mode rejection: 90dB (typical).
- Low Quiescent Current: 175µA.
- High Accuracy Over Temperature: Excellent TCR tracking of the resistors maintains gain accuracy and common-mode rejection over temperature.
- Capacitive Load Drive Capability: Stable operation with up to 10,000pF load.
Applications
- Differential Input Amplifier: Ideal for amplifying differential signals.
- Instrumentation Amplifier: Used in various instrumentation applications.
- Unity-Gain Inverting Amplifier: Can be configured as an inverting amplifier with a gain of -1).
- Summing Amplifier: Can be used to sum multiple input signals).
- Differential Current Receiver: Suitable for receiving differential current signals).
- Voltage-Controlled Current Source: Can be used in voltage-controlled current source applications).
- Battery-Powered Systems: Low power consumption makes it suitable for battery-powered systems).
- Ground Loop Eliminator: Helps in eliminating ground loops in measurement systems).
- Optical Modules, Building Security Gateways, AC Analog Input Module, Mass Spectrometer, CPU (PLC Controller), Lab and Field Instrumentation: Various other industrial and scientific applications).
Q & A
- What is the operating temperature range of the INA132U/2K5?
The INA132U/2K5 operates over the industrial temperature range of –40°C to +85°C.
- What are the supply voltage ranges for the INA132U/2K5?
The INA132U/2K5 can operate on single supplies from 2.7V to 36V or dual supplies from ±1.35V to ±18V.
- What is the typical common-mode rejection ratio (CMRR) of the INA132U/2K5?
The typical CMRR is 90dB.
- What is the quiescent current of the INA132U/2K5?
The quiescent current is approximately 175µA.
- What is the small signal bandwidth of the INA132U/2K5?
The small signal bandwidth is 300kHz.
- Can the INA132U/2K5 drive large capacitive loads?
Yes, it is stable with loads up to 10,000pF.
- What package types are available for the INA132U/2K5?
The INA132U/2K5 is available in an 8-pin SOIC surface-mount package.
- How accurate is the gain of the INA132U/2K5?
The gain error is ±0.075% (maximum).
- Can the INA132U/2K5 be used in single-supply applications?
Yes, it is an excellent choice for single-supply applications due to its internal op amp’s common-mode range extending to the negative supply.
- What are some common applications of the INA132U/2K5?
Common applications include differential input amplifiers, instrumentation amplifiers, summing amplifiers, and various industrial and scientific applications.
