Datasheet

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Triple, Wideband, Fixed Gain

Video BUFFER AMPLIFIER With Disable

FEATURES

● FLEXIBLE SUPPLY RANGE:

+5V to +12V Single Supply

±2.5V to ±6V Dual Supplies

● INTERNALLY FIXED GAIN: +2 or ±1

● HIGH BANDWIDTH (G = +2): 225MHz

● LOW SUPPLY CURRENT: 5.1mA/ch

● LOW DISABLED CURRENT: 150µA/ch

● HIGH OUTPUT CURRENT: 190mA

● OUTPUT VOLTAGE SWING: ±4.0V

● IMPROVED HIGH-FREQUENCY PINOUT

APPLICATIONS

● RGB VIDEO LINE DRIVERS

● MULTIPLE LINE VIDEO DAs

● PORTABLE INSTRUMENTS

● ADC BUFFERS

● ACTIVE FILTERS

● WIDEBAND DIFFERENTIAL RECEIVERS

● IMPROVED UPGRADE TO OPA3682

DESCRIPTION

The OPA3692 provides an easy-to-use, broadband fixed

gain, triple buffer amplifier. Depending on the external

connections, the internal resistor network may be used to

provide either a fixed gain of +2 video buffer, or a gain of +1

or –1 voltage buffer. Operating on a very low 5.1mA/ch

supply current, the OPA3692 offers a slew rate and output

power normally associated with a much higher supply cur-

rent. A new output stage architecture delivers high output

current with minimal headroom and crossover distortion.

This gives exceptional single-supply operation. Using a

single +5V supply, the OPA3692 can deliver a 1V to 4V

output swing with over 120mA drive current and > 200MHz

bandwidth. This combination of features makes the OPA3692

an ideal RGB line driver or single-supply, triple Analog-to-

Digital Converter (ADC) input driver.

The low 5.1mA/ch supply current of the OPA3692 is precisely

trimmed at +25°C. This trim, along with low drift over tempera-

ture, ensures lower maximum supply current than competing

products that report only a room temperature nominal supply

current. System power can be further reduced by using the

optional disable control pin. Leaving this disable pin open, or

holding it HIGH, gives normal operation. If pulled LOW, the

OPA3692 supply current drops to less than 150µA/ch while

the output goes into a high-impedance state. This feature

may be used for power savings.

OPA3692

SBOS228E – FEBRUARY 2002 – REVISED DECEMBER 2008

www.ti.com

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.

OPA3692 RELATED PRODUCTS

SINGLES DUALS TRIPLES

Voltage-Feedback OPA690 OPA2690 OPA3690

Current-Feedback OPA691 OPA2691 OPA3691

Fixed Gain OPA692 — OPA3682

OPA3692

1/3

OPA3692

402Ω402Ω

75.0Ω

RG-59

1/3

OPA3692

402Ω402Ω

75.0Ω

RG-59

1/3

OPA3692

402Ω402Ω

75.0Ω

75Ω Cable

75.0Ω

RG-59

RGB Line Driver

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.

All trademarks are the property of their respective owners.

Summary of content (27 pages)

PAGE 1
OPA3692 OPA 369 2 SBOS228E – FEBRUARY 2002 – REVISED DECEMBER 2008 www.ti.com Triple, Wideband, Fixed Gain Video BUFFER AMPLIFIER With Disable FEATURES APPLICATIONS ● FLEXIBLE SUPPLY RANGE: +5V to +12V Single Supply ±2.5V to ±6V Dual Supplies ● INTERNALLY FIXED GAIN: +2 or ±1 ● HIGH BANDWIDTH (G = +2): 225MHz ● LOW SUPPLY CURRENT: 5.1mA/ch ● LOW DISABLED CURRENT: 150µA/ch ● HIGH OUTPUT CURRENT: 190mA ● OUTPUT VOLTAGE SWING: ±4.
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ABSOLUTE MAXIMUM RATINGS(1) ELECTROSTATIC DISCHARGE SENSITIVITY Power Supply ............................................................................... ±6.5VDC Internal Power Dissipation(2) ............................ See Thermal Information Differential Input Voltage(3) ............................................................... ±1.2V Input Voltage Range ............................................................................ ±VS Storage Temperature Range: D, DBQ ...........................
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ELECTRICAL CHARACTERISTICS: VS = ±5V (Cont.) Boldface limits are tested at +25°C. G = +2 (–IN grounded) and RL = 100Ω (see Figure 1 for AC performance only), unless otherwise noted. OPA3692ID, OPA3692IDBQ MIN/MAX OVER TEMPERATURE(1) TYP PARAMETER AC PERFORMANCE (Cont.) Settling Time to 0.02% 0.
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ELECTRICAL CHARACTERISTICS: VS = +5V Boldface limits are tested at +25°C. G = +2 (–IN grounded though 0.1µF) and RL = 100Ω to VS /2 (see Figure 2 for AC performance only), unless otherwise noted. OPA3692ID, OPA3692IDBQ MIN/MAX OVER TEMPERATURE(1) TYP PARAMETER AC PERFORMANCE (see Figure 2) Small-Signal Bandwidth (VO < 0.5VPP) Bandwidth for 0.1dB Gain Flatness Peaking at a Gain of +1 Large-Signal Bandwidth Slew Rate Rise-and-Fall Time Settling Time to 0.02% 0.
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TYPICAL CHARACTERISTICS: VS = ±5V TA = +25°C, G = +2 (–In grounded), and RL = 100Ω, (see Figure 1 for AC performance only), unless otherwise noted. SMALL-SIGNAL FREQUENCY RESPONSE LARGE-SIGNAL FREQUENCY RESPONSE 1 7 VO = 1Vp-p G = +1 6 –1 VO = 2Vp-p G = –1 –2 Gain (1dB/div) Normalized Gain (1dB/div) 0 –3 –4 –5 5 4 VO = 4Vp-p G = +2 –6 3 VO = 7Vp-p –7 2 –8 0 250MHz 0 500MHz 125MHz SMALL-SIGNAL PULSE RESPONSE LARGE-SIGNAL PULSE RESPONSE 4 VO = 0.
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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) TA = +25°C, G = +2 (–In grounded), and RL = 100Ω, (see Figure 1 for AC performance only), unless otherwise noted. HARMONIC DISTORTION vs LOAD RESISTANCE HARMONIC DISTORTION vs SUPPLY VOLTAGE –60 –50 VO = 2Vp-p f = 5MHz VO = 2Vp-p RL = 100Ω f = 5MHz –55 –70 Harmonic Distortion (dBc) Harmonic Distortion (dBc) –65 2nd-Harmonic –75 –80 3rd-Harmonic –85 –90 –95 –60 2nd-Harmonic –65 –70 –75 –80 3rd-Harmonic –85 –100 –90 100 1000 2.0 2.5 3.
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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) TA = +25°C, G = +2 (–In grounded), and RL = 100Ω, (see Figure 1 for AC performance only), unless otherwise noted. 2-TONE, 3RD-ORDER INTERMODULATION SPURIOUS INPUT VOLTAGE AND CURRENT NOISE DENSITY –30 3rd-Order Spurious Level (dBc) Inverting Input Current Noise (15pA/√Hz) 10 Noninverting Current Noise (12pA/√Hz) Voltage Noise (1.
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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) TA = +25°C, G = +2 (–In grounded), and RL = 100Ω, (see Figure 1 for AC performance only), unless otherwise noted. TYPICAL DC DRIFT OVER TEMPERATURE OUTPUT VOLTAGE AND CURRENT LIMITATIONS Output Current Limited VO (V) 2 1 25Ω Load Line 0 –1 50Ω Load Line –2 100Ω Load Line 1W Internal Power Limit Single Channel –3 –4 Output Current Limit 0 50 30 1 20 0.5 10 Inverting Input Bias Current 0 0 –0.5 –10 Input Offset Voltage –1 –20 –1.
PAGE 9
TYPICAL CHARACTERISTICS: VS = +5V TA = +25°C, G = +2 (–In grounded), and RL = 100Ω, (see Figure 1 for AC performance only), unless otherwise noted. LARGE-SIGNAL FREQUENCY RESPONSE SMALL-SIGNAL FREQUENCY RESPONSE 1 7 VO = 0.5Vp-p 0 6 Normalized Gain (1dB/div) G = +1 –1 Gain (1dB/div) 5 –2 G = –1 –3 –4 –5 3 2 –6 G = +2 1 –7 RL = 100Ω to 2.5V –8 0 0 250MHz 0 500MHz 125MHz LARGE-SIGNAL PULSE RESPONSE SMALL-SIGNAL PULSE RESPONSE 4.1 2.9 Output Voltage (400mV/div) G = +2 VO = 0.
PAGE 10
TYPICAL CHARACTERISTICS: VS = +5V (Cont.) TA = +25°C, G = +2 (–In grounded), and RL = 100Ω, (see Figure 1 for AC performance only), unless otherwise noted. HARMONIC DISTORTION vs FREQUENCY HARMONIC DISTORTION vs LOAD RESISTANCE –60 –50 Harmonic Distortion (dBc) Harmonic Distortion (dBc) VO = 2Vp-p f = 5MHz –65 2nd-Harmonic –70 3rd-Harmonic –75 –80 2nd-Harmonic –70 –80 3rd-Harmonic 0.
PAGE 11
APPLICATIONS INFORMATION WIDEBAND BUFFER OPERATION The OPA3692 gives the exceptional AC performance of a wideband, current-feedback op amp with a highly linear, high-power output stage. It features internal RF and RG resistors that make it easy to select a gain of +2, +1, or –1 without external resistors. Requiring only 5.1mA/ch quiescent current, the OPA3692 swings to within 1V of either supply rail and delivers in excess of 160mA at room temperature.
PAGE 12
HIGH-SPEED INSTRUMENTATION AMPLIFIER 7 Figure 3 shows an instrumentation amplifier based on the OPA3692. The offset matching between inputs makes this an attractive input stage for this application. The differential-tosingle-ended gain for this circuit is 2.0V/V. The inputs are high impedance, with only 1pF to ground at each input. The loads on the OPA3692 outputs are equal for the best harmonic distortion possible.
PAGE 13
LOW-PASS FILTER The demonstration fixtures can be requested at the Texas Instruments web site at (www.ti.com) through the OPA3692 product folder. The circuit in Figure 6 realizes a 7th-order Butterworth lowpass filter with a –3dB bandwidth of 20MHz. This filter is based on the KRC active filter topology, which uses an amplifier with the fixed gain ≥ 1. The OPA3692 makes a good amplifier for this type of filter. The component values have been adjusted to compensate for the parasitic effects of the op amp.
PAGE 14
OPERATING SUGGESTIONS DRIVING CAPACITIVE LOADS GAIN SETTING Setting the gain with the OPA3692 is very easy. For a gain of +2, ground the –IN pin and drive the +IN pin with the signal. For a gain of +1, leave the –IN pin open and drive the +IN pin with the signal. For a gain of –1, ground the +IN pin and drive the –IN pin with the signal. As the internal resistor values (not their ratios) change significantly over temperature and process, external resistors should not be used to modify the gain.
PAGE 15
harmonic increases by less than the expected 12dB. This also shows up in the 2-tone, 3rd-order intermodulation spurious (IM3) response curves. The 3rd-order spurious levels are extremely low at low output power levels. The output stage continues to hold them low even as the fundamental power reaches very high levels. As the Typical Characteristics show, the spurious intermodulation powers do not increase as predicted by a traditional intercept model.
PAGE 16
DISABLE OPERATION The OPA3692 provides an optional disable feature that can be used either to reduce system power or to implement a simple channel multiplexing operation. If the DIS control pin is left unconnected, the OPA3692 operates normally. To disable, the control pin must be asserted LOW. Figure 8 shows a simplified internal circuit for the disable control feature.
PAGE 17
BOARD LAYOUT GUIDELINES Achieving optimum performance with a high frequency amplifier like the OPA3692 requires careful attention to board layout parasitics and external component types. Recommendations that will optimize performance include: a) Minimize parasitic capacitance to any AC ground for all of the signal I/O pins. Parasitic capacitance on the output pin can cause instability: on the noninverting input, it can react with the source impedance to cause unintentional bandlimiting.
PAGE 18
Revision History DATE REVISION PAGE 12/08 E 2 6/06 D SECTION DESCRIPTION Absolute Maximum Ratings Changed minimum Storage Temperature Range from −40°C to −65°C. 13 Design-In Tools 18 Applications Information Demonstration fixture numbers changed. Added Revision History table. NOTE: Page numbers for previous revisions may differ from page numbers in the current version. 18 OPA3692 www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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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 OPA3692IDBQR SSOP DBQ 16 OPA3692IDBQT SSOP DBQ OPA3692IDR SOIC D SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 5.2 2.1 8.0 12.0 Q1 2500 330.0 12.4 6.4 16 250 180.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.
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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) OPA3692IDBQR SSOP DBQ 16 2500 367.0 367.0 35.0 OPA3692IDBQT SSOP DBQ 16 250 210.0 185.0 35.0 OPA3692IDR SOIC D 16 2500 367.0 367.0 38.
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