Overview
The INA117PG4, produced by Texas Instruments, is a precision unity-gain difference amplifier designed to handle high common-mode input voltages. This device is a single monolithic IC that includes a precision op-amp and an integrated thin-film resistor network. It is capable of accurately measuring small differential voltages in the presence of common-mode signals up to ±200V. The INA117PG4 is particularly useful in applications where galvanic isolation is not essential, allowing it to replace isolation amplifiers and eliminate the need for costly isolated input-side power supplies and their associated noise and quiescent current.
The device is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages, with an operating temperature range of –40°C to 85°C. Its high common-mode rejection ratio (CMRR) and low nonlinearity make it suitable for a variety of industrial and measurement applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Common-mode input range | ±200 | V (VS = ±15V) |
| Protected inputs (common-mode) | ±500 | V |
| Protected inputs (differential) | ±500 | V |
| Unity gain error | 0.05% | - |
| Nonlinearity | 0.001% | - |
| CMRR (Common-mode rejection ratio) | 86dB (minimum) | - |
| Differential input impedance | 800kΩ | - |
| Bandwidth, –3dB | 200kHz | - |
| Slew rate | 1.7 to 2.6 V/µs | - |
| Settling time (to 0.1%) | 6.5µs | - |
| Quiescent current | 1.5 ± 2mA | - |
| Output voltage | 10 to 12V (IO = 20mA, –5mA) | - |
| Operating temperature range | –40°C to 85°C | - |
Key Features
- High Common-Mode Input Range: The INA117PG4 can handle common-mode input voltages up to ±200V, making it suitable for applications with high common-mode signals.
- Protected Inputs: The device is protected from momentary common-mode or differential overloads up to ±500V.
- Unity Gain Accuracy: It offers a high accuracy with a gain error of 0.05% maximum.
- Low Nonlinearity: The nonlinearity is as low as 0.001%, ensuring precise measurements.
- High CMRR: A minimum CMRR of 86dB ensures effective rejection of common-mode signals.
- High Bandwidth: The device has a bandwidth of 200kHz, suitable for a wide range of applications.
- Compact Packaging: Available in 8-pin plastic mini-DIP and SO-8 surface-mount packages.
Applications
- Single Multi-Axis Servo Drives: Suitable for precision control in servo drive systems.
- Industrial Machine and Machine Tools: Used in various industrial automation and machine tool applications.
- Semiconductor Test and ATE: Ideal for testing and automation in semiconductor manufacturing.
- Ultrasound Scanners: Used in medical imaging equipment due to its high precision and noise rejection capabilities.
- Current Monitoring and Battery Cell-Voltage Monitoring: Effective in monitoring current and voltage in battery cells and other power systems.
- Ground Breaker and Input Protection: Provides protection against overloads and ensures reliable operation in harsh environments.
- Signal Acquisition in Noisy Environments: Suitable for signal acquisition in noisy or high-impedance power-supply lines.
- Factory Automation: Used in various factory automation applications requiring precise signal measurement and processing.
Q & A
- What is the common-mode input range of the INA117PG4?
The INA117PG4 can handle common-mode input voltages up to ±200V.
- What is the maximum gain error of the INA117PG4?
The maximum gain error is 0.05%.
- What is the nonlinearity of the INA117PG4?
The nonlinearity is as low as 0.001%.
- What is the CMRR of the INA117PG4?
The minimum CMRR is 86dB.
- What is the bandwidth of the INA117PG4?
The bandwidth is 200kHz.
- What are the available package types for the INA117PG4?
The device is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages.
- What is the operating temperature range of the INA117PG4?
The operating temperature range is –40°C to 85°C.
- How is the output voltage related to the input voltage?
The output voltage is equal to the differential input voltage between the inverting and non-inverting inputs.
- What are some common applications of the INA117PG4?
It is used in single multi-axis servo drives, industrial machine and machine tools, semiconductor test and ATE, ultrasound scanners, and more.
- How does the INA117PG4 protect against overloads?
The device is protected from momentary common-mode or differential overloads up to ±500V.
