Overview
The INA105KPG4, produced by Texas Instruments, is a precision unity-gain differential amplifier. It is a monolithic device that integrates a precision op-amp and on-chip metal film resistors, which are laser trimmed for accurate gain and high common-mode rejection. This amplifier is designed to provide a precise differential amplification function without the need for an external precision resistor network. It is available in various packages, including 8-pin plastic DIP and SO-8 surface-mount packages, making it versatile for different application needs.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Gain Error | 0.005% | 0.01% | 0.025% | % |
| Gain Drift vs Temperature | 1 | 2 | 5 | ppm/°C |
| Nonlinearity | 0.0002% | 0.001% | - | % |
| Output Voltage Range | - | - | ±10V | V |
| Output Current | - | - | ±20mA | mA |
| Input Impedance (Differential) | 50kΩ | - | - | kΩ |
| Input Impedance (Common-Mode) | 50kΩ | - | - | kΩ |
| Common-Mode Rejection Ratio (CMRR) | 80 | 90 | 100 | dB |
| Power Supply Voltage Range | ±5V | ±15V | ±18V | V |
| Quiescent Current | ±1.5mA | ±2mA | - | mA |
| Operating Temperature Range | -40°C | - | +85°C | °C |
Key Features
- Precision unity-gain differential amplifier with integrated on-chip metal film resistors.
- Laser-trimmed resistors for high accuracy and common-mode rejection.
- Excellent temperature coefficient (TCR) tracking of resistors to maintain gain accuracy and CMR over temperature.
- Available in 8-pin plastic DIP and SO-8 surface-mount packages.
- High common-mode rejection ratio (CMRR) up to 100 dB.
- Low gain error and nonlinearity.
- Wide operating temperature range from -40°C to +85°C.
Applications
- Precision instrumentation amplifiers.
- Differential amplifiers in various measurement and control systems.
- Current receivers with compliance to rails.
- Precision summing and averaging amplifiers.
- Voltage-controlled current sources.
- Window comparators and other precision analog circuits.
Q & A
- What is the primary function of the INA105KPG4?
The INA105KPG4 is a precision unity-gain differential amplifier. - What type of resistors are used in the INA105KPG4?
The device uses on-chip metal film resistors that are laser trimmed for accuracy. - What is the typical common-mode rejection ratio (CMRR) of the INA105KPG4?
The CMRR is typically up to 100 dB. - What are the available package options for the INA105KPG4?
It is available in 8-pin plastic DIP and SO-8 surface-mount packages. - What is the operating temperature range of the INA105KPG4?
The operating temperature range is from -40°C to +85°C. - How accurate is the gain of the INA105KPG4?
The gain error is typically 0.01%. - What is the maximum output current of the INA105KPG4?
The maximum output current is ±20mA. - Can the INA105KPG4 be used in high-temperature environments?
Yes, it can operate up to +85°C and is specified up to this temperature. - Is the INA105KPG4 suitable for low-noise applications?
Yes, it is designed for precision and low noise, making it suitable for such applications. - What are some common applications of the INA105KPG4?
It is commonly used in precision instrumentation amplifiers, current receivers, and other precision analog circuits.
