Overview
The INA146UA/2K5, produced by Texas Instruments, is a high-voltage, programmable gain difference amplifier. This precision amplifier is designed to accurately attenuate high differential voltages and reject high common-mode voltages, making it compatible with common signal processing voltage levels. The INA146UA/2K5 features a wide supply range, low quiescent current, and high common-mode rejection, making it an excellent choice for various industrial and professional applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (Single Supply) | 4.5 | 36 | V | |
| Supply Voltage (Dual Supplies) | ±2.25 | ±18 | V | |
| Input Common-Mode Voltage | VS– to (VS+) – 1 | V | ||
| Differential Gain | 0.1 | 100 | V/V | |
| Quiescent Current | 570 | 700 | 750 | µA |
| Bandwidth (G = 0.1) | 550 | kHz | ||
| Slew Rate | 0.45 | V/µs | ||
| Common-Mode Rejection Ratio (CMRR) | 70 | 80 | dB | |
| Operating Temperature | –40 | 85 | °C | |
| Package Type | SOIC-8 |
Key Features
- High common-mode voltage capability: up to ±100 V at VS = ±15 V
- Programmable differential gain from 0.1 V/V to 100 V/V using external resistors
- Low quiescent current: 570 µA typical
- Wide supply range: single supply from 4.5 V to 36 V, dual supplies from ±2.25 V to ±18 V
- High common-mode rejection ratio (CMRR): up to 80 dB
- Low gain error: 0.025%
- Laser-trimmed on-chip precision resistors for accurate gain and high CMRR
- Operating temperature range: –40°C to 85°C
Applications
- Battery cell formation and test equipment
- AC drive control modules
- HVAC controllers
- Professional audio amplifiers (rack mount)
- Programmable DC power sources
- Data acquisition (DAQ) systems
Q & A
- What is the INA146UA/2K5 used for?
The INA146UA/2K5 is a high-voltage, programmable gain difference amplifier used to accurately attenuate high differential voltages and reject high common-mode voltages.
- What is the supply voltage range for the INA146UA/2K5?
The INA146UA/2K5 can operate with a single supply from 4.5 V to 36 V or with dual supplies from ±2.25 V to ±18 V.
- How is the gain of the INA146UA/2K5 set?
The gain is set using two external resistors, RG1 and RG2, according to the equation: G = 0.1 × (1 + RG2/RG1).
- What is the common-mode rejection ratio (CMRR) of the INA146UA/2K5?
The CMRR is up to 80 dB.
- What is the operating temperature range of the INA146UA/2K5?
The operating temperature range is –40°C to 85°C.
- What package type is the INA146UA/2K5 available in?
The INA146UA/2K5 is available in an SOIC-8 package.
- What are some typical applications of the INA146UA/2K5?
Typical applications include battery cell formation and test equipment, AC drive control modules, HVAC controllers, professional audio amplifiers, programmable DC power sources, and data acquisition systems.
- How does the INA146UA/2K5 handle high common-mode voltages?
The INA146UA/2K5 can handle high common-mode voltages up to ±100 V at VS = ±15 V and has an input common-mode range that extends beyond both supply rails.
- What is the quiescent current of the INA146UA/2K5?
The quiescent current is typically 570 µA.
- What is the bandwidth of the INA146UA/2K5 at a gain of 0.1?
The bandwidth at a gain of 0.1 is 550 kHz.
