High-fidelity, high-voltage (36-V), low-noise (3.7-nV/rtHz) Burr-Brown™ audio fully-differential amp
Product details
Parameters
Package | Pins | Size
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
- Input offset voltage: ±200 µV (maximum)
- Input bias current: 2 nA (maximum)
- Low bias current noise: 400 fA/√Hz at 10 Hz
- Gain-bandwidth product: 9.2 MHz
- Differential output slew rate: 15 V/µs
- 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
- Current limit
- Package: 8-pin VSSOP
- Temperature range: –40°C to +125°C
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Description
The OPA1637 is a low-noise, low total harmonic distortion (THD), fully differential, Burr-Brown™ Audio operational amplifier that 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 exceptional low noise and THD, the bipolar super-beta inputs yield a very low noise figure at very-low quiescent current and input bias current. This device is designed for audio circuits where low power consumption is required along with 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 ±18 V. This capability allows 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 enables the OPA1637 for use in high-gain configurations with minimal impact to the audio signal noise.
The OPA1637 is characterized for operation over the wide temperature range of –40°C to +125°C, and is available in an 8-pin VSSOP package.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | OPA1637 High-Fidelity, Low-Noise, Fully-Differential, Burr-Brown™ Audio Op Amp datasheet (Rev. B) | Aug. 18, 2020 |
Application note | Optimizing Noise and Power with Super Beta-Fully Differential Amplifiers | Dec. 07, 2020 | |
More literature | OPA1637EVM EU Declaration of Conformity (DoC) | Jun. 25, 2020 | |
User guide | OPA1637 Evaluation Module User's Guide (Rev. A) | Jun. 10, 2020 | |
Technical article | No headroom, no problem: buffering and filtering an audio signal chain in low-voltage systems | Apr. 11, 2019 | |
Technical article | Amp up your cans: Is your op amp stable? (Part 2) | Jan. 22, 2016 | |
Technical article | Stress-induced outbursts: Microphonics in ceramic capacitors (Part 2) | Dec. 23, 2014 | |
Technical article | Stress-induced outbursts: Microphonics in ceramic capacitors (Part 1) | Dec. 19, 2014 | |
Application note | Compensate Transimpedance Amplifiers Intuitively (Rev. A) | Mar. 30, 2005 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Eases design by providing a quick and simple way to evaluate the OPA1637
- SMA Connectors and test points provided on the EVM allows for quick tests of the OPA1637
- XLR Audio connectors on the EVM provide an easy way to evaluate the OPA1637 using an audio analyzer
- The OPA1637EVM is configured by default (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSSOP (DGK) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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