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High-fidelity, high-voltage (36-V), low-noise (3.7-nV/rtHz) Burr-Brown™ audio fully-differential amp

Availability: 102


Package | PIN: VSSOP (DGK) | 8
Temp: Q (-40 to 125)
Package qty | Carrier: 2,500 | LARGE T&R
Qty Price
1-99 $2.22
100-249 $1.95
250-999 $1.37
1,000+ $1.10


  • Low input voltage noise: 3.7 nV/√Hz at 1 kHz
  • Low THD + N: –120 dB at 10 kHz
  • Low supply current: 950 µA at ±18 V
  • Input offset voltage: ±200 µV (maximum)
  • Input bias current: 2 nA (maximum)
  • 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
  • Amplifier overload power limit
  • Current limit
  • Package: 8-pin VSSOP
  • Temperature range: –40°C to +125°C

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Texas Instruments  XOPA1637DGKR

The OPA1637 is a low-noise, low total harmonic distortion (THD), Burr-Brown™ fully differential amplifier that easily filters and drives fullydifferential, audio signal chains. The OPA1637 is also used to convert single-ended sources todifferential outputs required by high-fidelity analog-to-digital converters (ADCs). Designed forexceptional low noise and THD, the bipolar super-beta inputs yield a very low noise figure atvery-low quiescent current and input bias current. This device is designed for audio circuits wherelow power consumption is required along with excellent signal-to-noise ratio (SNR) andspurious-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 improvedheadroom and dynamic range without adding separate amplifiers for each polarity of the differentialsignal. Very-low voltage and current noise enables the OPA1637 for use in high-gain configurationswith 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.