Overview
The INA105, produced by Burr-Brown (now part of Texas Instruments), is a precision unity-gain differential amplifier. It is a monolithic device that includes 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. The INA105 is available in various packages, including 8-pin plastic DIP, SO-8 surface-mount, and TO-99 metal packages.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Gain | 1 | 1 | 1 | V/V |
| Power Supply Voltage Range | ±5 | ±15 | ±18 | V |
| Quiescent Current | ±1.5 | ±2 | mA | |
| Temperature Range (Operation) | -40 | 85 | °C | |
| Temperature Range (Storage) | -65 | 150 | °C | |
| Common-Mode Rejection Ratio (CMRR) | 100 | dB | ||
| Nonlinearity | 0.0002% | % | ||
| Gain Error | 0.005% | % |
Key Features
- Precision unity-gain differential amplifier with on-chip metal film resistors.
- Laser-trimmed resistors for accurate gain and high common-mode rejection.
- Excellent temperature coefficient of resistance (TCR) tracking for stable performance over temperature.
- Available in 8-pin plastic DIP, SO-8 surface-mount, and TO-99 metal packages.
- Low gain error and nonlinearity.
- High common-mode rejection ratio (CMRR).
Applications
- Precision instrumentation amplifiers.
- Difference amplifiers.
- Current receivers with compliance to rails.
- Precision summing and averaging amplifiers.
- Precision voltage references and buffers.
- Electrometer circuits.
- Instrumentation amplifier guard drive generators.
Q & A
- What is the gain of the INA105? The gain of the INA105 is 1 (unity gain).
- What types of packages is the INA105 available in? The INA105 is available in 8-pin plastic DIP, SO-8 surface-mount, and TO-99 metal packages.
- What is the common-mode rejection ratio (CMRR) of the INA105? The CMRR of the INA105 is 100 dB.
- What is the temperature range for operation and storage of the INA105? The operation temperature range is -40°C to +85°C, and the storage temperature range is -65°C to +150°C.
- How accurate is the gain of the INA105? The gain error of the INA105 is typically 0.005%.
- What is the nonlinearity of the INA105? The nonlinearity of the INA105 is typically 0.0002%.
- Can the INA105 be used in high-temperature environments? Yes, the INA105 can operate up to 85°C and can be stored up to 150°C.
- Is the INA105 suitable for low-noise applications? Yes, the INA105 is designed for low-noise applications and is suitable for precision instrumentation.
- How do I ensure good common-mode rejection with the INA105? To ensure good common-mode rejection, the source impedances connected to the inputs must be nearly equal.
- Can the INA105 be used in electrometer circuits? Yes, the INA105 can be used in electrometer circuits due to its high precision and low noise characteristics.
