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OPA891

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180-MHz 0.95-nV√Hz operational amplifier with ultra-low total harmonic distortion (THD)

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Data sheet

OPA891

ACTIVE
Data sheet Order now

Product details

Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 GBW (typ) (MHz) 180 BW at Acl (MHz) 180 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 105 Vn at flatband (typ) (nV√Hz) 0.95 Vn at 1 kHz (typ) (nV√Hz) 1.1 Iq per channel (typ) (mA) 7.5 Vos (offset voltage at 25°C) (max) (mV) 1 Rail-to-rail No Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 106 Input bias current (max) (pA) 20000000 Offset drift (typ) (µV/°C) 1 Iout (typ) (mA) 200 2nd harmonic (dBc) 103 3rd harmonic (dBc) 110 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 GBW (typ) (MHz) 180 BW at Acl (MHz) 180 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 105 Vn at flatband (typ) (nV√Hz) 0.95 Vn at 1 kHz (typ) (nV√Hz) 1.1 Iq per channel (typ) (mA) 7.5 Vos (offset voltage at 25°C) (max) (mV) 1 Rail-to-rail No Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 106 Input bias current (max) (pA) 20000000 Offset drift (typ) (µV/°C) 1 Iout (typ) (mA) 200 2nd harmonic (dBc) 103 3rd harmonic (dBc) 110 Frequency of harmonic distortion measurement (MHz) 1
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Ultra-low 0.95 nV/√ Hz voltage noise
  • High Speed:
    • 180-MHz unity gain bandwidth
    • 140-MHz bandwidth [G = 2 (–1), –3 dB]
    • 105-V/µs slew rate
  • Very low distortion
    • THD = –91 dBc (f = 1 MHz, R L = 150 Ω)
    • THD = –100 dBc (f = 1 MHz, R L = 1 kΩ)
    • THD+N = =137 dBc (f = 1 kHz, BW = 80 kHz)
  • Low 0.2-mV (typical) and 1-mV (max) input offset voltage at 25°C
  • 200-mA output current drive (typical)
  • Typical operation from ±4.5 V to ±18 V
  • Offset nulling pins on the OPA891
  • Ultra-low 0.95 nV/√ Hz voltage noise
  • High Speed:
    • 180-MHz unity gain bandwidth
    • 140-MHz bandwidth [G = 2 (–1), –3 dB]
    • 105-V/µs slew rate
  • Very low distortion
    • THD = –91 dBc (f = 1 MHz, R L = 150 Ω)
    • THD = –100 dBc (f = 1 MHz, R L = 1 kΩ)
    • THD+N = =137 dBc (f = 1 kHz, BW = 80 kHz)
  • Low 0.2-mV (typical) and 1-mV (max) input offset voltage at 25°C
  • 200-mA output current drive (typical)
  • Typical operation from ±4.5 V to ±18 V
  • Offset nulling pins on the OPA891

The OPA891 and OPA2891 ( OPAx891) are ultra-low voltage noise, high-speed voltage feedback amplifiers that are an excellent choice for applications requiring low voltage noise, including communications and imaging. The single-amplifier OPA891 and the dual-amplifier OPA2891 offer very good ac performance with 140-MHz bandwidth (G = 2), 105-V/µs slew rate, and 70-ns settling time (0.1%). The OPAx891 are unity-gain stable with 180-MHz bandwidth. These amplifiers have a high drive capability of 200 mA and draw only 7.5-mA supply current per channel. With –100 dBc of total harmonic distortion (THD) at f = 1 MHz and a very low noise of 0.95 nV/√ Hz, the OPAx891 are designed for applications requiring low distortion and low noise such as buffering analog-to-digital converters.

The OPA891 and OPA2891 ( OPAx891) are ultra-low voltage noise, high-speed voltage feedback amplifiers that are an excellent choice for applications requiring low voltage noise, including communications and imaging. The single-amplifier OPA891 and the dual-amplifier OPA2891 offer very good ac performance with 140-MHz bandwidth (G = 2), 105-V/µs slew rate, and 70-ns settling time (0.1%). The OPAx891 are unity-gain stable with 180-MHz bandwidth. These amplifiers have a high drive capability of 200 mA and draw only 7.5-mA supply current per channel. With –100 dBc of total harmonic distortion (THD) at f = 1 MHz and a very low noise of 0.95 nV/√ Hz, the OPAx891 are designed for applications requiring low distortion and low noise such as buffering analog-to-digital converters.
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* Data sheet OPAx891, 180 MHz, 0.95 nV/√Hz, Ultra-low THD, Operational Amplifiers datasheet PDF | HTML 17 Nov 2023
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

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