Overview
The INA146UA is a precision difference amplifier produced by Texas Instruments. It is designed to accurately attenuate high differential voltages and reject high common-mode voltages, making it compatible with common signal processing voltage levels. The amplifier features high-voltage capability, providing inherent input protection, and its input common-mode range extends beyond both supply rails, making it suitable for both single and dual supply applications. On-chip precision resistors are laser-trimmed to achieve accurate gain and high common-mode rejection, ensuring continued high precision over temperature.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | Single Supply: 4.5 V to 36 V Dual Supplies: ±2.25 V to ±18 V | V |
| Quiescent Current | 570 µA | µA |
| Bandwidth | 550 kHz (G = 0.1) | kHz |
| Slew Rate | 0.45 V/µs | V/µs |
| Input Offset Voltage | 5 mV | mV |
| Common-Mode Rejection Ratio (CMRR) | 80 dB | dB |
| Gain Error | 0.025% | % |
| Differential Gain Range | 0.1 V/V to 100 V/V | V/V |
Key Features
- High common-mode voltage: up to 40 V at VS = 5 V and ±100 V at VS = ±15 V.
- Programmable differential gain: 0.1 V/V to 100 V/V set with external resistors.
- Low quiescent current: 570 µA.
- Wide supply range: single supply from 4.5 V to 36 V and dual supplies from ±2.25 V to ±18 V.
- Low gain error: 0.025%.
- High common-mode rejection: 80 dB.
- On-chip precision resistors laser-trimmed for accurate gain and high common-mode rejection.
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 primary function of the INA146UA?
The INA146UA is a precision difference amplifier designed to accurately attenuate high differential voltages and reject high common-mode voltages.
- What is the operating temperature range of the INA146UA?
The operating temperature range is -40°C to 85°C.
- What is the supply voltage range for the INA146UA?
The supply voltage range is from 4.5 V to 36 V for single supply and ±2.25 V to ±18 V for dual supplies.
- How is the gain of the INA146UA 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?
The CMRR is 80 dB.
- What are some typical applications of the INA146UA?
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 (DAQ) systems.
- What is the bandwidth of the INA146UA?
The bandwidth is 550 kHz for a gain of 0.1.
- How much quiescent current does the INA146UA consume?
The quiescent current is 570 µA.
- What is the input offset voltage of the INA146UA?
The input offset voltage is 5 mV.
- What type of package is the INA146UA available in?
The INA146UA is available in an SO-8 surface-mount package.
