OPA1637
High-fidelity, high-voltage (36-V), low-noise (3.7-nV/rtHz) Burr-Brown™ audio fully-differential amp
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
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.
OPA1637EVM — Fully differential audio amplifier evaluation module
OPA1637 TINA-TI Reference Design (Rev. A)
ANALOG-ENGINEER-CALC — Analog engineer's calculator
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | Download |
---|---|---|
VSSOP (DGK) | 8 | View options |
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