Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose PDIP 8

FEATURES

● LOW DISTORTION: 0.0003% at 1kHz

● LOW NOISE: 10nV/√Hz

● HIGH SLEW RATE: 25V/µs

● WIDE GAIN-BANDWIDTH: 20MHz

● UNITY-GAIN STABLE

● WIDE SUPPLY RANGE: V

= ±4.5 to ±24V

● DRIVES 600Ω LOAD

● DUAL VERSION AVAILABLE (OPA2604)

FET-Input, Low Distortion

OPERATIONAL AMPLIFIER

APPLICATIONS

● PROFESSIONAL AUDIO EQUIPMENT

● PCM DAC I/V CONVERTERS

● SPECTRAL ANALYSIS EQUIPMENT

● ACTIVE FILTERS

● TRANSDUCER AMPLIFIERS

● DATA ACQUISITION

OPA604

DESCRIPTION

The OPA604 is a FET-input operational amplifier designed

for enhanced AC performance. Very low distortion, low noise

and wide bandwidth provide superior performance in high

quality audio and other applications requiring excellent dy-

namic performance.

New circuit techniques and special laser trimming of dynamic

circuit performance yield very low harmonic distortion. The

result is an op amp with exceptional sound quality. The low-

noise FET input of the OPA604 provides wide dynamic

range, even with high source impedance. Offset voltage is

laser-trimmed to minimize the need for interstage coupling

capacitors.

The OPA604 is available in 8-pin plastic mini-DIP and SO-8

surface-mount packages, specified for the –25°C to +85°C

temperature range.

Distortion

Rejection

Circuitry

(1)

(3)

(+)

(2)

(–)

(7)

V+

(6)

(4)

V–

Output

Stage

(1)

NOTE: (1) Patents Granted: #5053718, 5019789

(5)

(1)

SBOS019A – JANUARY 1992 – SEPTEMBER 2003

www.ti.com

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

All trademarks are the property of their respective owners.

Summary of content (20 pages)

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OPA604 OPA 604 OPA 604 SBOS019A – JANUARY 1992 – SEPTEMBER 2003 FET-Input, Low Distortion OPERATIONAL AMPLIFIER FEATURES APPLICATIONS ● ● ● ● ● ● ● ● ● ● ● ● LOW DISTORTION: 0.0003% at 1kHz LOW NOISE: 10nV/√Hz HIGH SLEW RATE: 25V/µs WIDE GAIN-BANDWIDTH: 20MHz UNITY-GAIN STABLE WIDE SUPPLY RANGE: VS = ±4.
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ELECTROSTATIC DISCHARGE SENSITIVITY ABSOLUTE MAXIMUM RATINGS Power Supply Voltage ....................................................................... ±25V Input Voltage ............................................................... (V–)–1V to (V+)+1V Output Short Circuit to Ground ................................................ Continuous Operating Temperature .................................................. –40°C to +100°C Storage Temperature ......................................................
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ELECTRICAL CHARACTERISTICS TA = +25°C, VS = ±15V, unless otherwise noted. OPA604AP, AU PARAMETER OFFSET VOLTAGE Input Offset Voltage Average Drift Power Supply Rejection INPUT BIAS CURRENT(1) Input Bias Current Input Offset Current CONDITION MIN TYP MAX UNITS ±5 80 ±1 ±8 100 mV µV/°C dB VS = ±5 to ±24V VCM = 0V VCM = 0V NOISE Input Voltage Noise Noise Density: f = 10Hz f = 100Hz f = 1kHz f = 10kHz Voltage Noise, BW = 20Hz to 20kHz Input Bias Current Noise Current Noise Density, f = 0.
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TYPICAL CHARACTERISTICS TA = +25°C, VS = ±15V, unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY 1 THD + N (%) 0.1 Measurement BW = 80kHz See “Distortion Measurements” for description of test method. VO G = 100V/V 0.01 See “Distortion Measurements” for description of test method. 1kΩ 0.01 THD + N (%) VO = 3.5Vrms 1kΩ 0.1 TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT VOLTAGE f = 1kHz Measurement BW = 80kHz 0.001 G = 10V/V 0.001 G = 1V/V 0.0001 20 100 1k 10k 0.0001 0.
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TYPICAL CHARACTERISTICS (Cont.) TA = +25°C, VS = ±15V, unless otherwise noted.
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TYPICAL CHARACTERISTICS (Cont.) TA = +25°C, VS = ±15V, unless otherwise noted. MAXIMUM OUTPUT VOLTAGE SWING vs FREQUENCY SETTLING TIME vs CLOSED-LOOP GAIN 30 5 VO = 10V Step RL = 1kΩ CL = 50pF VS = ±15V Output Voltage (Vp-p) Settling Time (µs) 4 3 0.01% 2 0.
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TYPICAL CHARACTERISTICS (Cont.) TA = +25°C, VS = ±15V, unless otherwise noted. MAXIMUM POWER DISSIPATION vs TEMPERATURE POWER DISSIPATION vs SUPPLY VOLTAGE 1.4 0.5 Worst case sine wave RL = 600Ω 0.40 0.35 Total Power Dissipation (W) Power Dissipation (W) 0.45 Typical high-level music RL = 600Ω 0.30 0.25 0.20 No signal or no load 0.15 θJ-A = 90°C/W Soldered to Circuit Board (see text) 1.2 1.0 0.8 0.6 Maximum Specified Operating Temperature 85°C 0.4 0.2 0.10 0 0.
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For the unity-gain buffer, Figure 3a, stability is preserved by adding a phase-lead network, RC and CC. Voltage drop across RC will reduce output voltage swing with heavy loads. An alternate circuit, Figure 3b, does not limit the output with low load impedance. It provides a small amount of positive feedback to reduce the net feedback factor. Input impedance of this circuit falls at high frequency as op amp gain rolloff reduces the bootstrap action on the compensation network.
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(a) (b) CC 820pF RC ei CC 0.47µF 750Ω CL 5000pF CC = eo OPA604 eo OPA604 R2 RC 2kΩ 10Ω CL 5000pF ei 120 X 10–12 CL RC = CC = R2 4CL X 1010 – 1 CL X 103 RC (c) (d) R1 R2 R1 R2 10kΩ 10kΩ 2kΩ 2kΩ CC RC 20Ω 24pF CC 0.22µF RC eo OPA604 ei CL 5000pF 50 CL R2 CC = OPA604 eo ei 25Ω RC = CC = CL 5000pF R2 2CL X 1010 – (1 + R2/R1) CL X 103 RC (e) (f) R2 R1 R2 2kΩ 2kΩ e1 2kΩ R1 RC 20Ω ei 2kΩ eo OPA604 RC 20Ω OPA604 CC 0.22µF CL 5000pF CC 0.
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R4 22kΩ C3 R1 R2 100pF R3 VIN 2.7kΩ 22kΩ C1 3000pF OPA604 10kΩ VO C2 2000pF fp = 20kHz FIGURE 4. Three-Pole Low-Pass Filter. R1 R5 OPA604 VO VIN 6.04kΩ 2kΩ R2 4.02kΩ R2 4.02kΩ C3 1000pF 1 Low-pass 3-pole Butterworth f–3dB = 40kHz 2 OPA2604 1 2 OPA2604 C1 1000pF R4 5.36kΩ See Application Bulletin AB-026 for information on GIC filters. C2 1000pF FIGURE 5. Three-Pole Generalized Immittance Converter (GIC) Low-Pass Filter. 1 7.
PAGE 11
100Ω 10kΩ NOTE: (1) C1 ≈ COUT 2π Rf fc RF = Internal feedback resistance = 1.5kΩ fC = Crossover frequency = 8MHz G = 101 (40dB) 10 OPA604 5 PCM63 20-bit 6 D/A Converter 9 Piezoelectric Transducer 1MΩ(1) C1(1) OPA604 VO = ±3Vp To low-pass filter. NOTE: (1) Provides input bias current return path. FIGURE 7. High Impedance Amplifier. FIGURE 8. Digital Audio DAC I-V Amplifier. OPA604 A2 I2 R4 OPA604 R3 51Ω 51Ω A1 VIN IL = I1 + I2 R2 I1 VOUT Load R1 VOUT = VIN (1+R2/R1) FIGURE 9.
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SOUND QUALITY The following discussion is provided, recognizing that not all measured performance behavior explains or correlates with listening tests by audio experts. The design of the OPA604 included consideration of both objective performance measurements, as well as an awareness of widely held theory on the success and failure of previous op amp designs. I1 800µA R2 75Ω R1 75Ω R5 500Ω J1 J2 J3 1 VBE = 1kHz + DC Bias FFT IC VO IC V (mA) BE 0 1 0.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 24-Jan-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Jul-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device OPA604AU/2K5 Package Package Pins Type Drawing SOIC D 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 12.4 Pack Materials-Page 1 6.4 B0 (mm) K0 (mm) P1 (mm) 5.2 2.1 8.0 W Pin1 (mm) Quadrant 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Jul-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA604AU/2K5 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.