Overview
The INA217, produced by Texas Instruments, is a low-noise, low-distortion monolithic instrumentation amplifier. It is designed to provide wide bandwidth and excellent dynamic response over a wide range of gain settings. This device is particularly suited for amplifying low-level audio signals, such as those from balanced low-impedance microphones, and is also suitable for high-level audio stages due to its wide supply voltage range, excellent output voltage swing, and high output current drive. The INA217 operates over a temperature range of –40°C to 85°C, making it versatile for various industrial, instrumentation, and medical applications.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Gain Range | V/V | 1 | 10000 | ||
| Gain Error (G = 100) | VS = ±15 V, RL = 2 kΩ | % | ±0.2% | ||
| Noise Voltage (RTI) | f = 1 kHz | nV/√Hz | 1.3 | ||
| THD+N (G = 100, f = 1 kHz) | VS = ±15 V, RL = 2 kΩ | % | 0.004% | 0.1% | |
| Bandwidth (Small Signal, –3 dB, G = 100) | VS = ±15 V, RL = 2 kΩ | kHz | 800 | ||
| Slew Rate | VS = ±15 V, RL = 2 kΩ | V/μs | 15 | ||
| Common-Mode Rejection Ratio (CMRR) | VCM = ±11 V, RSRC = 0 Ω, G = 100 | dB | 100 | 116 | |
| Supply Voltage Range | V | ±4.5 | ±18 | ||
| Operating Temperature Range | °C | –40 | 85 |
Key Features
- Low Noise: 1.3 nV/√Hz at 1 kHz, providing near-theoretical noise performance for 200-Ω source impedance.
- Low Distortion: Total Harmonic Distortion plus Noise (THD+N) of 0.004% at 1 kHz with a gain of 100.
- Wide Bandwidth: Up to 800 kHz at a gain of 100, ensuring excellent dynamic response.
- High Common-Mode Rejection Ratio (CMRR): Greater than 100 dB, enhancing signal quality.
- Wide Supply Range: Operates from ±4.5 V to ±18 V, making it versatile for various applications.
- Gain Set With External Resistor: Gain is adjustable using an external resistor (RG), allowing for gains from 1 to 10,000.
- Differential Input: Suitable for balanced low-impedance microphones and other differential signal sources.
- High Output Current Drive: Capable of driving high-level audio stages effectively.
Applications
- Professional Microphone Preamps: Ideal for amplifying low-level audio signals from balanced microphones.
- Moving-Coil Transducer Amplifiers: Suitable for amplifying signals from moving-coil transducers.
- Differential Receivers: Used in applications requiring differential signal amplification.
- Bridge Transducer Amplifiers: Applicable for bridge-type transducer signal amplification.
- Industrial and Medical Applications: Beneficial in various industrial and medical contexts due to its low noise and wide bandwidth.
Q & A
- What is the typical noise voltage of the INA217 at 1 kHz?
The INA217 has a typical noise voltage of 1.3 nV/√Hz at 1 kHz.
- What is the maximum gain that can be set for the INA217?
The gain of the INA217 can be set up to 10,000 using an external resistor (RG).
- What is the common-mode rejection ratio (CMRR) of the INA217 at a gain of 100?
The CMRR of the INA217 is greater than 100 dB at a gain of 100.
- What is the operating temperature range of the INA217?
The INA217 operates over a temperature range of –40°C to 85°C.
- What are the typical applications of the INA217?
The INA217 is typically used in professional microphone preamps, moving-coil transducer amplifiers, differential receivers, and bridge transducer amplifiers.
- How is the gain of the INA217 set?
The gain of the INA217 is set using an external resistor (RG) according to the equation G = 1 + 10k/RG.
- What is the slew rate of the INA217?
The slew rate of the INA217 is 15 V/μs.
- What is the bandwidth of the INA217 at a gain of 100?
The bandwidth of the INA217 at a gain of 100 is up to 800 kHz.
- Can the INA217 be used in high-level audio stages?
Yes, the INA217 is suitable for high-level audio stages due to its wide output voltage swing and high output current drive.
- What are the package options for the INA217?
The INA217 is available in DIP-8 and SOIC-16 widebody packages.
