Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Audio VSSOP 8

OPA1642

OPA1641

OPA1644

Burr-BrownAudio

IN-

Pre-OutputDriver

OUT

IN+

V+

V-

OPA1641

OPA1642

OPA1644

www.ti.com

SBOS484B –DECEMBER 2009–REVISED AUGUST 2010

™ High-Performance, JFET-Input

AUDIO OPERATIONAL AMPLIFIERS

Check for Samples: OPA1641, OPA1642, OPA1644

FEATURES

DESCRIPTION

234

• SUPERIOR SOUND QUALITY

The OPA1641 (single), OPA1642 (dual), and

OPA1644 (quad) series are JFET-input, ultralow

• TRUE JFET INPUT OP AMP

distortion, low-noise operational amplifiers fully

WITH LOW INPUT BIAS CURRENT

specified for audio applications.

• LOW NOISE: 5.1nV/√Hz at 1kHz

The OPA1641, OPA1642, and OPA1644 rail-to-rail

• ULTRALOW DISTORTION: 0.00005% at 1kHz

output swing allows increased headroom, making

• HIGH SLEW RATE: 20V/ms

these devices ideal for use in any audio circuit.

• UNITY GAIN STABLE

Features include 5.1nV/√Hz noise, low THD+N

(0.00005%), a low input bias current of 2pA, and low

• NO PHASE REVERSAL

quiescent current of 1.8mA per channel.

• LOW QUIESCENT CURRENT:

These devices operate over a very wide supply

1.8mA per Channel

voltage range of ±2.25V to ±18V. The OPA1641,

• RAIL-TO-RAIL OUTPUT

OPA1642, and OPA1644 series of op amps are

• WIDE SUPPLY RANGE: ±2.25V to ±18V

unity-gain stable and provide excellent dynamic

• SINGLE, DUAL, AND QUAD VERSIONS

behavior over a wide range of load conditions.

AVAILABLE

The dual and quad versions feature completely

independent circuitry for lowest crosstalk and

APPLICATIONS

freedom from interactions between channels, even

• PROFESSIONAL AUDIO EQUIPMENT

when overdriven or overloaded.

• ANALOG AND DIGITAL MIXING CONSOLES

The OPA1641, OPA1642, and OPA1644 are

• BROADCAST STUDIO EQUIPMENT

specified from –40°C to +85°C. SoundPlus™

• HIGH-END A/V RECEIVERS

• HIGH-END BLU-RAY™ PLAYERS

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2SoundPlus is a trademark of Texas Instruments Incorporated.

3BLU-RAY is a trademark of Blu-Ray Disc Assocation.

4All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (28 pages)

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OP A1 641 OP A1 642 OPA1641 OPA1642 OPA1644 OP A1 64 4 Burr-Brown Audio www.ti.com SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 ™ High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS Check for Samples: OPA1641, OPA1642, OPA1644 FEATURES DESCRIPTION • SUPERIOR SOUND QUALITY • TRUE JFET INPUT OP AMP WITH LOW INPUT BIAS CURRENT • LOW NOISE: 5.1nV/√Hz at 1kHz • ULTRALOW DISTORTION: 0.00005% at 1kHz • HIGH SLEW RATE: 20V/ms • UNITY GAIN STABLE • NO PHASE REVERSAL • LOW QUIESCENT CURRENT: 1.
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OPA1641 OPA1642 OPA1644 SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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OPA1641 OPA1642 OPA1644 www.ti.com SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 ELECTRICAL CHARACTERISTICS: VS = +4.5V to +36; ±2.25V to ±18V At TA = +25°C, RL = 2kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted. OPA1641, OPA1642, OPA1644 PARAMETER CONDITIONS MIN TYP MAX UNIT AUDIO PERFORMANCE Total Harmonic Distortion + Noise THD+N Intermodulation Distortion G = +1, f = 1kHz, VO = 3VRMS IMD 0.
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OPA1641 OPA1642 OPA1644 SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 www.ti.com ELECTRICAL CHARACTERISTICS: VS = +4.5V to +36; ±2.25V to ±18V (continued) At TA = +25°C, RL = 2kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted. OPA1641, OPA1642, OPA1644 PARAMETER CONDITIONS MIN TYP MAX UNIT OUTPUT Voltage Output Swing from Rail VO Output Current RL = 10kΩ, AOL ≥ 120dB (V–)+0.2 (V+)–0.2 V RL = 2kΩ, AOL ≥ 114dB (V–)+0.35 (V+)–0.
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OPA1641 OPA1642 OPA1644 www.ti.com SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 TYPICAL CHARACTERISTICS: VS = ±18V At TA = +25°C, RL = 2kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted. INPUT VOLTAGE NOISE DENSITY vs FREQUENCY 0.1Hz to 10Hz NOISE 100nV/div Voltage Noise Density (nV/ÖHz) 100 10 1 0.1 1 10 100 1k 10k Time (1s/div) 100k Frequency (Hz) Figure 1. Figure 2.
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OPA1641 OPA1642 OPA1644 SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 2kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted. THD+N RATIO vs FREQUENCY G = -1 RL = 2kW G = +1 RL = 600W G = -1 RL = 600W 0.0001 -120 G = +1 RL = 2kW 0.00001 Total Harmonic Distortion + Noise (%) VOUT = 3VRMS BW = 80kHz -140 10 100 -80 0.01 RSOURCE OPA1641 -120 0.0001 RSOURCE = 0W 0.00001 10 Frequency (Hz) Figure 7.
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OPA1641 OPA1642 OPA1644 www.ti.com SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 2kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted. CHANNEL SEPARATION vs FREQUENCY -90 NO PHASE REVERSAL VS = ±15V VOUT = 3VRMS G = +1 Output -100 RL = 600W 5V/div Channel Separation (dB) -80 -110 -120 +18V RL = 2kW OPA1641 Output -18V 37VPP Sine Wave (±18.5V) -130 RL = 5kW -140 100 10 1k 10k Time (0.
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OPA1641 OPA1642 OPA1644 SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 2kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted. POSITIVE OVERLOAD RECOVERY VOUT NEGATIVE OVERLOAD RECOVERY G = -10 G = -10 5V/div 5V/div VIN 20kW 20kW 2kW VIN 2kW VOUT OPA1641 OPA1641 VIN VOUT VIN VOUT Time (0.4ms/div) 40 Time (0.4ms/div) Figure 19. Figure 20.
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OPA1641 OPA1642 OPA1644 www.ti.com SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 2kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted. IB AND IOS vs COMMON-MODE VOLTAGE 10 8 QUIESCENT CURRENT vs TEMPERATURE 2.5 VS = ±18V 2.0 +IB 4 -IB 2 0 IQ (mA) IB and IOS (pA) 6 IOS -2 1.5 1.0 -4 -6 0.5 -8 Common-Mode Range -10 -18 -12 0 -6 6 12 0 -40 -25 -10 18 5 20 Common-Mode Voltage (V) Figure 25.
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OPA1641 OPA1642 OPA1644 SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 www.ti.com APPLICATION INFORMATION The OPA1641, OPA1642, and OPA1644 are unity-gain stable, audio operational amplifiers with very low noise, input bias current, and input offset voltage. Applications with noisy or high-impedance power supplies require decoupling capacitors placed close to the device pins. In most cases, 0.1mF capacitors are adequate. The front-page drawing shows a simplified schematic of the OPA1641.
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OPA1641 OPA1642 OPA1644 www.ti.com SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 Figure 32 illustrates both noninverting (A) and inverting (B) op amp circuit configurations with gain. In circuit configurations with gain, the feedback network resistors also contribute noise. In general, the current noise of the op amp reacts with the feedback resistors to create additional noise components. However, the extremely low current noise of the OPA164x means that its current noise contribution can be neglected.
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OPA1641 OPA1642 OPA1644 SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 www.ti.com TOTAL HARMONIC DISTORTION MEASUREMENTS The OPA164x series op amps have excellent distortion characteristics. THD + Noise is below 0.00005% (G = +1, VO = 3VRMS, BW = 80kHz) throughout the audio frequency range, 20Hz to 20kHz, with a 2kΩ load (see Figure 7 for characteristic performance). The distortion produced by the OPA164x series op amps is below the measurement limit of many commercially available distortion analyzers.
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OPA1641 OPA1642 OPA1644 www.ti.com SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 SOURCE IMPEDANCE AND DISTORTION PHASE-REVERSAL PROTECTION For lowest distortion with a source or feedback network, the impedance seen by the positive and negative inputs in noninverting applications should be matched. The n-channel JFETs in the FET input stage exhibit a varying input capacitance with applied common-mode input voltage.
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OPA1641 OPA1642 OPA1644 SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 Although the output current is limited by internal protection circuitry, accidental shorting of one or more output channels of a device can result in excessive heating. For instance, when an output is shorted to mid-supply, the typical short-circuit current of 36mA leads to an internal power dissipation of over 600mW at a supply of ±18V.
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OPA1641 OPA1642 OPA1644 www.ti.com SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 Another common question involves what happens to the amplifier if an input signal is applied to the input while the power supplies +VS and/or –VS are at 0V. Again, it depends on the supply characteristic while at 0V, or at a level below the input signal amplitude. If the supplies appear as high impedance, then the operational amplifier supply current may be supplied by the input source via the current steering diodes.
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OPA1641 OPA1642 OPA1644 SBOS484B – DECEMBER 2009 – REVISED AUGUST 2010 www.ti.com REVISION HISTORY NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (April, 2010) to Revision B • Page Removed product-preview information for MSOP-8 package version of OPA1641 .............................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing OPA1641AIDGKR VSSOP DGK 8 OPA1641AIDGKT VSSOP DGK OPA1641AIDR SOIC D OPA1642AIDGKR VSSOP OPA1642AIDGKT SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 8 250 180.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 8 2500 330.0 12.4 6.4 5.2 2.1 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA1641AIDGKR VSSOP DGK 8 2500 367.0 367.0 35.0 OPA1641AIDGKT VSSOP DGK 8 250 210.0 185.0 35.0 OPA1641AIDR SOIC D 8 2500 367.0 367.0 35.0 OPA1642AIDGKR VSSOP DGK 8 2500 367.0 367.0 35.0 OPA1642AIDGKT VSSOP DGK 8 250 210.0 185.0 35.0 OPA1642AIDR SOIC D 8 2500 367.0 367.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.