Overview
The INA117KU/2K5G4 is a precision unity-gain difference amplifier produced by Texas Instruments. This device is part of the INA117 series, known for its high common-mode input voltage range and robust protection features. The INA117 is a single monolithic IC that includes a precision op-amp and an integrated thin-film resistor network, enabling it to accurately measure small differential voltages in the presence of high common-mode signals up to ±200V. The inputs are protected from momentary common-mode or differential overloads up to ±500V, making it suitable for a variety of demanding applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Common-mode input range | -200 | 200 | V | |
| Differential input range | -10 | 10 | V | |
| Offset voltage (RTO, P package) | 120 | 1000 | µV | |
| Offset voltage (RTO, KU package) | 600 | 2000 | µV | |
| Offset voltage drift | 8.5 | µV/°C | ||
| PSRR | 74 | 90 | dB | |
| CMRR (DC, VCM = -200V to 200V) | 70 | 80 | dB | |
| Bandwidth, -3dB | 200 | kHz | ||
| Full power bandwidth | 30 | kHz | ||
| Slew rate | 1.7 | 2.6 | V/µs | |
| Settling time to 0.1% (VO = 10V step) | 6.5 | µs | ||
| Quiescent current | 1.5 | ±2 | mA | |
| Operating temperature range | -40 | 85 | °C |
Key Features
- High Common-Mode Input Range: The INA117 can handle common-mode signals up to ±200V and is protected from momentary overloads up to ±500V.
- Precision Unity-Gain Difference Amplifier: The device features a precision op-amp and an integrated thin-film resistor network, ensuring accurate measurement of small differential voltages.
- Low Nonlinearity and Gain Error: The amplifier has a nonlinearity of 0.001% maximum and a gain error of ±0.05% maximum.
- High CMRR: The common-mode rejection ratio (CMRR) is 70dB minimum, ensuring effective rejection of common-mode signals.
- Wide Bandwidth: The device has a bandwidth of 200kHz and a full power bandwidth of 30kHz.
- Robust Packaging Options: Available in 8-pin plastic mini-DIP and SO-8 surface-mount packages.
Applications
- Single Multi-Axis Servo Drives: Suitable for precise control in servo drive systems.
- Industrial Machines and Machine Tools: Used in various industrial applications requiring high precision and robustness.
- Semiconductor Test and ATE: Employed in automated test equipment for semiconductor testing.
- Ultrasound Scanners: Utilized in medical equipment for accurate signal processing.
- Current Sensing and Measurement: Can be used to measure current by sensing the voltage drop across a series resistor.
Q & A
- What is the common-mode input range of the INA117?
The INA117 can handle common-mode signals up to ±200V.
- What is the maximum differential input range for the INA117?
The differential input range is -10V to 10V.
- What is the typical offset voltage for the INA117 in the KU package?
The typical offset voltage for the KU package is 1000µV.
- What is the CMRR of the INA117?
The CMRR is 70dB minimum.
- What is the bandwidth of the INA117?
The bandwidth is 200kHz.
- What is the operating temperature range for the INA117?
The operating temperature range is -40°C to 85°C.
- How is the INA117 protected against overloads?
The inputs are protected from momentary common-mode or differential overloads up to ±500V.
- What are some common applications of the INA117?
Applications include single multi-axis servo drives, industrial machines, semiconductor test and ATE, ultrasound scanners, and current sensing.
- How can the INA117 be used for current measurement?
The INA117 can measure current by sensing the voltage drop across a series resistor.
- What packaging options are available for the INA117?
The device is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages.
