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OPA1637
High-fidelity, high-voltage (36-V), low-noise (3.7-nV/rtHz) Burr-Brown™ audio fully-differential amp
Data sheet
OPA1637
- 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
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
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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | OPA1637 High-Fidelity, Low-Noise, Fully-Differential, Burr-Brown™ Audio Operational Amplifier datasheet (Rev. B) | PDF | HTML | 18 Aug 2020 |
| Application note | Understanding Op Amp Noise in Audio Circuits | PDF | HTML | 14 Jun 2021 | |
| Application note | Optimizing Noise and Power with Super Beta-Fully Differential Amplifiers | PDF | HTML | 07 Dec 2020 | |
| Certificate | OPA1637EVM EU Declaration of Conformity (DoC) | 25 Jun 2020 | ||
| EVM User's guide | OPA1637 Evaluation Module User's Guide (Rev. A) | PDF | HTML | 10 Jun 2020 | |
| Application note | Compensate Transimpedance Amplifiers Intuitively (Rev. A) | 30 Mar 2005 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
OPA1637EVM — Fully differential audio amplifier evaluation module
The OPA1637 is a high-performance, low-noise, low total harmonic distortion (THD), fully differential amplifier that can easily filter and drive fully differential audio signal chains from Texas Instruments. The OPA1637EVM is designed to provide access to the features and measure the performance (...)
Simulation model
OPA1637 TINA-TI Reference Design (Rev. A)
SBOMB87A.TSC (132 KB) - TINA-TI Reference Design
Calculation tool
ANALOG-ENGINEER-CALC — Analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool
TINA-TI — SPICE-based analog simulation program
TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
| Package | Pins | Download |
|---|---|---|
| VSSOP (DGK) | 8 | View options |
Ordering & quality
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