Texas Instruments OPA1637 Audio Fully-Differential Amplifier
Texas Instruments OPA1637 Audio Fully-Differential Amplifier is a low-noise, low total harmonic distortion (THD), fully differential, Burr-Brown™ Audio operational amplifier. It easily filters and drives fully differential audio signal chains. The OPA1637 also converts single-ended sources to differential outputs required by high-fidelity analog-to-digital converters (ADCs). Designed for exceptionally low noise and THD, the bipolar super-beta inputs yield a very low noise figure at a very low quiescent current and input bias current. Texas Instruments OPA1637 is designed for audio circuits with low power consumption, excellent signal-to-noise ratio (SNR), and spurious-free dynamic range (SFDR).
The OPA1637 features high-voltage supply capability, allowing for supply voltages up to ±18V. This capability enables high-voltage differential signal chains to benefit from the improved headroom and dynamic range without adding separate amplifiers for each polarity of the differential signal. Very low voltage and current noise enable the OPA1637 to be used in high-gain configurations with minimal impact on the audio signal noise. The Texas Instruments OPA1637 is characterized for operation over a wide temperature range of –40°C to +125°C and is available in an 8-pin VSSOP package.
Features
- 3.7nV/√Hz at 1kHz low input voltage noise
- –120dB at 1kHz low THD + N
- 950µA at ±18V low supply current
- ±200µV (maximum) input offset voltage
- 2nA (maximum) input bias current
- 400fA/√Hz at 10Hz low bias current noise
- 9.2MHz gain-bandwidth product
- 15V/µs differential output slew rate
- Wide input and output common-mode range
- 3V to 36V wide single-supply operating range
- < 20µA low supply current power-down feature
- Overload power limit
- Current limit
- 8-pin VSSOP package
- –40°C to +125°C temperature range
Applications
- Professional audio mixer or control surface
- Professional microphones and wireless systems
- Professional speaker systems
- Professional audio amplifier
- Soundbar
- Turntable
- Professional video camera
- Guitar and other instrument amplifiers
- Data acquisition (DAQ)
Functional Block Diagram
Paskelbta: 2020-07-14
| Atnaujinta: 2024-07-01