Overview
The OPA1637DGKR from Texas Instruments is a high-fidelity, low-noise, fully-differential audio operational amplifier. It is designed with Texas Instruments' super-beta bipolar input devices, which provide exceptional low noise and total harmonic distortion (THD) performance. This amplifier is ideal for professional audio equipment and high-end consumer audio applications, ensuring minimal distortion and noise to maintain the integrity of the audio signal. The OPA1637DGKR can easily filter and drive fully differential audio signal chains and convert single-ended sources to differential outputs required by high-fidelity analog-to-digital converters (ADCs).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Noise | 3.7 nV/√Hz at 1 kHz | nV/√Hz |
| Total Harmonic Distortion + Noise (THD + N) | –120 dB at 1 kHz | dB |
| Supply Current | 950 µA at ±18 V | µA |
| Input Offset Voltage | ±200 µV (maximum) | µV |
| Input Bias Current | 2 nA (maximum) | nA |
| Bias Current Noise | 400 fA/√Hz at 10 Hz | fA/√Hz |
| Gain-Bandwidth Product | 9.2 MHz | MHz |
| Differential Output Slew Rate | 15 V/µs | V/µs |
| Single-Supply Operating Range | 3 V to 36 V | V |
| Power-Down Supply Current | < 20 µA | µA |
| Package | 8-pin VSSOP | |
| Operating Temperature Range | –40°C to +125°C | °C |
Key Features
- Low input voltage noise: 3.7 nV/√Hz at 1 kHz
- Low THD + N: –120 dB at 1 kHz
- Low supply current: 950 µA at ±18 V
- Wide input and output common-mode range
- Wide single-supply operating range: 3 V to 36 V
- Low supply current power-down feature: < 20 µA
- Overload power limit and current limit
- High-voltage supply capability up to ±18 V
- Compact 8-pin VSSOP package
- Operating temperature range: –40°C to +125°C
Applications
- Professional audio mixers or control surfaces
- Professional microphones and wireless systems
- Professional speaker systems
- Professional audio amplifiers
- Soundbars
- Turntables
- Professional video cameras
- Guitar and other instrument amplifiers
- Data acquisition (DAQ) systems
Q & A
- What is the input voltage noise of the OPA1637DGKR?
The input voltage noise of the OPA1637DGKR is 3.7 nV/√Hz at 1 kHz.
- What is the total harmonic distortion + noise (THD + N) of the OPA1637DGKR?
The THD + N of the OPA1637DGKR is –120 dB at 1 kHz.
- What is the supply current of the OPA1637DGKR?
The supply current of the OPA1637DGKR is 950 µA at ±18 V.
- What is the input offset voltage of the OPA1637DGKR?
The input offset voltage of the OPA1637DGKR is ±200 µV (maximum).
- What is the package type and pin count of the OPA1637DGKR?
The OPA1637DGKR comes in an 8-pin VSSOP package.
- What is the operating temperature range of the OPA1637DGKR?
The operating temperature range of the OPA1637DGKR is –40°C to +125°C.
- What are some typical applications of the OPA1637DGKR?
The OPA1637DGKR is used in professional audio mixers, microphones, speaker systems, audio amplifiers, soundbars, turntables, professional video cameras, guitar amplifiers, and data acquisition systems.
- Does the OPA1637DGKR support power-down mode?
Yes, the OPA1637DGKR has a power-down feature with a supply current of less than 20 µA in power-down mode.
- What is the gain-bandwidth product of the OPA1637DGKR?
The gain-bandwidth product of the OPA1637DGKR is 9.2 MHz.
- What is the differential output slew rate of the OPA1637DGKR?
The differential output slew rate of the OPA1637DGKR is 15 V/µs.
