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OPA692

SBOS236E – MARCH 2002 – REVISED DECEMBER 2008

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DESCRIPTION

The OPA692 provides an easy to use, broadband fixed gain

video buffer amplifier. Depending on the external connec-

tions, 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 supply cur-

rent, the OPA692 offers a slew rate and output power

normally associated with a much higher supply current. 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 OPA692 can deliver a 1V to 4V output swing with

over 120mA drive current and > 200MHz bandwidth. This

combination of features makes the OPA692 an ideal RGB

line driver or single-supply Analog-to-Digital Converter (ADC)

input driver.

The low 5.1mA supply current for the OPA692 is precisely

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

perature, ensures a lower maximum supply current than

competing products that report only a room temperature

nominal supply current. System power may be further re-

duced by using the optional disable control pin. Leaving this

disable pin open, or holding it HIGH, gives normal operation.

If pulled LOW, the OPA692 supply current drops to less than

150µA while the I/O pins go into a high-impedance state.

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

● LOW DISABLED CURRENT: 150µA

● HIGH OUTPUT CURRENT: 190mA

● OUTPUT VOLTAGE SWING: ±4.0V

● SOT23-6 AVAILABLE

Wideband, Fixed Gain

Video BUFFER AMPLIFIER With Disable

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.

APPLICATIONS

● BROADBAND VIDEO LINE DRIVERS

● MULTIPLE LINE VIDEO DA

● PORTABLE INSTRUMENTS

● ADC BUFFERS

● ACTIVE FILTERS

OPA692 RELATED PRODUCTS

SINGLES DUALS TRIPLES

Voltage-Feedback OPA690 OPA2690 OPA3690

Current-Feedback OPA691 OPA2691 OPA3691

Fixed Gain OPA682 OPA2682 OPA3692

Video

Out

75Ω

RG-59

75Ω

RG-59

75Ω

RG-59

75Ω

RG-59

75Ω

DIS

OPA692

SO-8

G = +2

+5V

–5V

Video

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.

225MHz, 4-Output Component Video DA

All trademarks are the property of their respective owners.

Summary of content (30 pages)

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OPA OPA692 69 2 OPA6 92 SBOS236E – MARCH 2002 – REVISED DECEMBER 2008 www.ti.com Wideband, Fixed Gain Video BUFFER AMPLIFIER With Disable FEATURES DESCRIPTION ● 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 ● LOW DISABLED CURRENT: 150µA ● HIGH OUTPUT CURRENT: 190mA ● OUTPUT VOLTAGE SWING: ±4.
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ELECTROSTATIC DISCHARGE SENSITIVITY ABSOLUTE MAXIMUM RATINGS(1) 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, DVB ...........................
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ELECTRICAL CHARACTERISTICS: VS = ±5V Boldface limits are tested at +25°C. G = +2 (–IN grounded) and RL = 100Ω (see Figure 1 for AC performance only), unless otherwise noted. OPA692ID, IDBV TYP PARAMETER CONDITIONS +25°C MIN/MAX OVER TEMPERATURE +25°C(1) 0°C to 70°C –40°C to +85°C UNITS MHz typ 185 180 170 MHz min B MHz typ C MIN/ TEST MAX LEVEL(2 ) AC PERFORMANCE (see Figure 1) Small-Signal Bandwidth (VO < 0.5VPP) Bandwidth for 0.
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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.
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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. OPA692ID, IDBV TYP PARAMETER CONDITIONS +25°C MIN/MAX OVER TEMPERATURE +25°C(1) 0°C to 70°C –40°C to +85°C UNITS MHz typ 168 160 140 MHz min B MHz typ C MIN/ TEST MAX LEVEL(2 ) AC PERFORMANCE (see Figure 2) Small-Signal Bandwidth (VO < 0.5VPP) Bandwidth for 0.
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ELECTRICAL CHARACTERISTICS: VS = +5V (Cont.) 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.
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TYPICAL CHARACTERISTICS: VS = ±5V TA = +25°C, G = +2, and RL = 100Ω (see Figure 1 for DC performance only), unless otherwise noted. SMALL-SIGNAL FREQUENCY RESPONSE LARGE-SIGNAL FREQUENCY RESPONSE 1 7 VO = 1Vp-p 6 G = +1 VO = 2Vp-p –1 G = –1 –2 5 Gain (1dB/div) Normalized Gain (1dB/div) 0 –3 –4 –5 VO = 4Vp-p 3 VO = 7Vp-p 2 G = +2 –6 4 1 –7 –8 0 0 250MHz 500MHz 0 125MHz Frequency (50MHz/div) LARGE-SIGNAL PULSE RESPONSE SMALL-SIGNAL PULSE RESPONSE 4 VO = 0.
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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) TA = +25°C, G = +2, and RL = 100Ω (see Figure 1 for DC performance only), unless otherwise noted. HARMONIC DISTORTION vs LOAD RESISTANCE 5MHz 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 –85 3rd-Harmonic –90 –95 –100 –60 2nd-Harmonic –65 –70 –75 –80 3rd-Harmonic –85 –105 –110 –90 100 1000 2 2.
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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) TA = +25°C, G = +2, and RL = 100Ω (see Figure 1 for DC 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, and RL = 100Ω (see Figure 1 for DC performance only), unless otherwise noted. TYPICAL DC DRIFT OVER TEMPERATURE OUTPUT VOLTAGE AND CURRENT LIMITATIONS Output Current Limited 1W Internal Power Limit Input Offset Voltage (mV) 3 VO (V) 2 1 25Ω Load Line 0 –1 50Ω Load Line –2 100Ω Load Line –3 –4 1W Internal Power Limit Output Current Limit 40 Noninverting Input Bias Current 1.5 30 1 20 0.
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TYPICAL CHARACTERISTICS: VS = +5V TA = +25°C, G = +2, and RL = 100Ω (see Figure 2 for AC performance only), unless otherwise noted. LARGE-SIGNAL FREQUENCY RESPONSE SMALL-SIGNAL FREQUENCY RESPONSE 1 7 VO = 0.5Vp-p 6 G = +1 –1 5 –2 Gain (1dB/div) Normalized Gain (1dB/div) 0 G = –1 –3 –4 –5 3 2 –6 G = +2 1 –7 RL = 100Ω to 2.5V –8 0 0 250M 0 500M 125M SMALL-SIGNAL PULSE RESPONSE LARGE-SIGNAL PULSE RESPONSE 2.9 4.1 G = +2 VO = 0.5Vp-p 2.
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TYPICAL CHARACTERISTICS: VS = +5V (Cont.) TA = +25°C, G = +2, and RL = 100Ω (see Figure 2 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.
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APPLICATIONS INFORMATION WIDEBAND BUFFER OPERATION The OPA692 gives the exceptional AC performance of a wideband current-feedback op amp with a highly linear, highpower output stage. It features internal RF and RG resistors that make it easy to select a gain of +2, +1, or –1 without any external resistors. Requiring only 5.1mA quiescent current, the OPA692 will swing to within 1V of either supply rail and deliver in excess of 160mA at room temperature.
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the output, centering the output voltage swing as well. Tested performance at a 20MHz analog input frequency and a 60MSPS clock rate on the converter gives > 58dBc SFDR. exceeding 5MHz. The high slew rate, exceptional output swing, and high linearity of the OPA692 make it an ideal single-supply ADC driver. Figure 3 shows an example input interface to a very high performance 10-bit, 60MSPS CMOS converter.
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Typically, channel switching is performed either on sync or retrace time in the video signal. The two inputs are approximately equal at this time. The make-before-break disable characteristic of the OPA692 ensures that there is always one amplifier controlling the line when using a wired-OR circuit (see Figure 4). Since both inputs may be on for a short period during the transition between channels, the outputs are combined through the output impedance matching resistors (68.1Ω in this case).
PAGE 16
DELAY-EQUALIZED LOW-PASS FILTER The circuit in Figure 6 realizes a 5th-order Butterworth lowpass filter with a –3dB bandwidth of 20MHz and group delay equalization. This filter is based on the KRC active filter topology using amplifiers with a fixed positive gain ≥ 1. VIN The component values have been predistorted to compensate for the op amps parasitic effects. The low-Q pole section was placed last to minimize noise peaking in the passband, while maintaining good dynamic range performance.
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charge as unpopulated PCBs, delivered with a user's guide. The summary information for these fixtures is shown in the table below. PRODUCT OPA692ID OPA692IDBV PACKAGE ORDERING NUMBER LITERATURE NUMBER SO-8 SOT23-6 DEM-OPA-SO-1A DEM-OPA-SOT-1A SBOU009 SBOU010 over-temperature specifications because the output stage junction temperatures are higher than the minimum specified operating ambient.
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expected 6dB, while the difference between it and the 3rd decreases 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.
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unconnected, the OPA692 will operate normally. To disable, the control pin must be asserted LOW. Figure 9 shows a simplified internal circuit for the disable control feature. +VS Q1 110kΩ 25kΩ IS Control Due to the high output power capability of the OPA692, heatsinking or forced airflow may be required under extreme operating conditions. Maximum desired junction temperature will set the maximum allowed internal power dissipation, as described below.
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b) Minimize the distance (< 0.25") from the power-supply pins to high-frequency 0.1µF decoupling capacitors. At the device pins, the ground and power-plane layout should not be in close proximity to the signal I/O pins. Avoid narrow power and ground traces to minimize inductance between the pins and the decoupling capacitors. The power-supply connections (on pins 4 and 7) should always be decoupled with these capacitors.
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Revision History DATE REVISION PAGE 12/08 E 2 3/06 D 16-17 SECTION DESCRIPTION Absolute Maximum Ratings Changed minimum Storage Temperature Range from −40°C to −65°C. Design-In Tools Board part number changed. NOTE: Page numbers for previous revisions may differ from page numbers in the current version. OPA692 SBOS236E www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (4) 24-Jan-2013 Only one of markings shown within the brackets will appear on the physical 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. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information.
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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 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) OPA692IDBVR SOT-23 DBV 6 3000 180.0 OPA692IDBVT SOT-23 DBV 6 250 OPA692IDR SOIC D 8 2500 B0 (mm) K0 (mm) P1 (mm) 8.4 3.2 3.1 1.39 4.0 180.0 8.4 3.2 3.1 1.39 330.0 12.4 6.4 5.2 2.1 Pack Materials-Page 1 W Pin1 (mm) Quadrant 8.0 Q3 4.0 8.0 Q3 8.0 12.
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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) OPA692IDBVR SOT-23 DBV 6 3000 210.0 185.0 35.0 OPA692IDBVT SOT-23 DBV 6 250 210.0 185.0 35.0 OPA692IDR SOIC D 8 2500 367.0 367.0 35.
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