OPA1641 Datasheet, PDF (1/31 Pages) Texas Instruments – High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS

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OPA1641, OPA1642, OPA1644
SBOS484C – DECEMBER 2009 – REVISED DECEMBER 2015
OPA164x Sound Plus High-Performance, JFET-Input Audio Operational Amplifiers
1 Features
•1 Superior Sound Quality
• True Jfet Input Operational Amplifier
With Low Input Bias Current
• Low Noise: 5.1 nv/√Hz at 1 kHz
• Ultralow Distortion: 0.00005% at 1 kHz
• High Slew Rate: 20 V/μs
• Unity Gain Stable
• No Phase Reversal
• Low Quiescent Current:
1.8 mA per Channel
• Rail-to-rail Output
• Wide Supply Range: ±2.25 V to ±18 V
• Single, Dual, and Quad Versions Available
2 Applications
• Professional Audio Equipment
• Analog and Digital Mixing Consoles
• Broadcast Studio Equipment
• High-end A/V Receivers
• High-end Blu-ray™ Players
3 Description
The OPA1641 (single), OPA1642 (dual), and
OPA1644 (quad) series are JFET-input, ultralow
distortion, low-noise operational amplifiers fully
specified for audio applications.
The OPA1641, OPA1642, and OPA1644 rail-to-rail
output swing allows increased headroom, making
these devices ideal for use in any audio circuit.
Features include 5.1-nV/√Hz noise, low THD+N
(0.00005%), a low input bias current of 2 pA, and low
quiescent current of 1.8 mA per channel.
These devices operate over a very wide supply
voltage range of ±2.25 V to ±18 V. The OPA1641,
OPA1642, and OPA1644 series of operational
amplifiers are unity-gain stable and provide excellent
dynamic behavior over a wide range of load
conditions.
The dual and quad versions feature completely
independent circuitry for lowest crosstalk and
freedom from interactions between channels, even
when overdriven or overloaded.
The OPA1641, OPA1642, and OPA1644 are
specified from –40°C to +85°C. SoundPlus™
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
OPA1641
SOIC (8)
MSOP (8)
4.90 mm × 3.90 mm
3.00 mm × 3.00 mm
OPA1642
SOIC (8)
MSOP (8)
4.90 mm × 3.90 mm
3.00 mm × 3.00 mm
OPA1644
SOIC (14)
TSSOP (14)
8.65 mm × 3.90 mm
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
space
Simplified Internal Schematic
V+
Extremely Stable Input Capacitance
7.5
7
Traditional JFET-Input Amplifier
6.5
Pre-Output Driver
6
OUT
5.5
OPA164x Family
IN-
IN+
5
4.5
V-
1
4
±10 ±8 ±6 ±4 ±2 0 2 4 6
Common-Mode Voltage (V)
8 10
C004
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.