Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Amplifier - Video buffering 1.4 GHz SOIC 8

Ultra-Wideband, Fixed Gain

Video BUFFER AMPLIFIER with Disable

www.ti.com

OPA693

SBOS285A – OCTOBER 2003 – REVISED JULY 2008

www.ti.com

DESCRIPTION

The OPA693 provides an easy to use, broadband, fixed gain

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 voltage buffer.

Operating on a low 13mA supply current, the OPA693 offers

a slew rate (2500V/µs) and bandwidth (> 700MHz) normally

associated with a much higher supply current. A new output

stage architecture delivers high output current with a minimal

headroom and crossover distortion. This gives exceptional

single-supply operation. Using a single +5V supply, the

OPA693 can deliver a 2.5V

swing with over 90mA drive

current and 500MHz bandwidth at a gain of +2. This combi-

nation of features makes the OPA693 an ideal RGB line

driver or single-supply undersampling Analog-to-Digital Con-

verter (ADC) input driver.

The OPA693’s low 13mA supply current is precisely trimmed

at 25°C. This trim, along with low drift over temperature,

ensures lower maximum supply current than competing

products that report only a room temperature nominal supply

current. System power may be further reduced by using the

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

holding it HIGH, gives normal operation. This optional dis-

able allows the OPA693 to fit into existing video buffer

layouts where the disable pin is unconnected to get improved

performance with no board changes. If pulled LOW, the

OPA693 supply current drops to less than 170µA while the

output goes into a high impedance state. This feature may be

used for power savings.

The low gain stable current-feedback architecture used in the

OPA693 is particularly suitable for high full-power bandwidth

cable driving requirements. Where the additional flexibility of

an op amp is required, consider the OPA695 ultra-wideband

current feedback op amp. Where a unity gain stable voltage

feedback op amp with very high slew rate is required,

consider the OPA690.

FEATURES

● VERY HIGH BANDWIDTH (G = +2): 700MHz

● FLEXIBLE SUPPLY RANGE:

+5V to +12V Single Supply

±2.5V to ±6V Dual Supplies

● INTERNALLY FIXED GAIN: +2 or ±1

● LOW SUPPLY CURRENT: 13mA

● LOW DISABLED CURRENT: 120µA

● HIGH OUTPUT CURRENT: ±120mA

● OUTPUT VOLTAGE SWING: ±4.1V

● SOT23-6 AVAILABLE

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

● HIGH FREQUENCY ACTIVE FILTERS

● HFA1112 IMPROVED DROP-IN

OPA693 RELATED PRODUCTS

SINGLES DUALS TRIPLES

Voltage Feedback OPA690 OPA2690 OPA3690

Current Feedback OPA691 OPA2691 OPA3691

Fixed Gain OPA692 — OPA3692

> 900MHz OPA695 — —

75Ω

Video

Out

Video

Out

75Ω

RG-59

75Ω

RG-59

75Ω

300Ω

DIS

OPA693

SO-8

G = +2

700MHz, 2-Output Component Video DA

+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.

All trademarks are the property of their respective owners.

Summary of content (32 pages)

PAGE 1
OPA OPA693 693 OPA6 93 www.ti.com SBOS285A – OCTOBER 2003 – REVISED JULY 2008 Ultra-Wideband, Fixed Gain Video BUFFER AMPLIFIER with Disable FEATURES DESCRIPTION ● VERY HIGH BANDWIDTH (G = +2): 700MHz ● FLEXIBLE SUPPLY RANGE: +5V to +12V Single Supply ±2.5V to ±6V Dual Supplies ● INTERNALLY FIXED GAIN: +2 or ±1 ● LOW SUPPLY CURRENT: 13mA ● LOW DISABLED CURRENT: 120µA ● HIGH OUTPUT CURRENT: ±120mA ● 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 .................................................................. ±1.2V Input Voltage Range ............................................................................ ±VS Storage Temperature Range: D, DVB ...........................
PAGE 3
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. OPA693ID, IDBV MIN/MAX OVER TEMPERATURE(1) TYP PARAMETER +25°C 0°C to 70°C –40°C to +85°C MHz typ 700 510 490 480 MHz min B G = –1 700 510 490 480 MHz typ C B CONDITIONS +25°C G = +1 1400 G = +2 UNITS MIN/ TEST MAX LEVEL(2 ) AC PERFORMANCE (see Figure 1) Small-Signal Bandwidth (VO < 1.
PAGE 4
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.
PAGE 5
ELECTRICAL CHARACTERISTICS: VS = +5V Boldface limits are tested at +25°C. G = +2 (–IN grounded though 0.001µF) and RL = 100Ω to VS/2 (see Figure 4 for AC performance only), unless otherwise noted. OPA693ID, 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 400 390 380 MHz min B MHz typ C B MIN/ TEST MAX LEVEL(2 ) AC PERFORMANCE (see Figure 4) Small-Signal Bandwidth (VO < 1.0VPP) Bandwidth for 0.
PAGE 6
ELECTRICAL CHARACTERISTICS: VS = +5V (Cont.) Boldface limits are tested at +25°C. G = +2 (–IN grounded though 0.001µF) and RL = 100Ω to VS/2 (see Figure 4 for AC performance only), unless otherwise noted.
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TYPICAL CHARACTERISTICS: VS = ±5V At TA = +25°C, G = +2, and RL = 100Ω, unless otherwise specified. LARGE-SIGNAL FREQUENCY RESPONSE SMALL-SIGNAL FREQUENCY RESPONSE 8 3 VO = 1VPP G = +1 G = +2 RL = 100Ω 7 6 1 G = +2 0 −1 G = −1 −2 4 2 −4 1 −5 0 −6 −1 100 1000 VO = 2VPP 3 −3 10 VO = 1VPP 5 Gain (dB) Normalized Gain (dB) 2 VO = 7VPP VO = 4VPP See Figure 1 0 2000 200 Frequency (MHz) FREQUENCY RESPONSE FLATNESS vs LOAD Normalized Gain (dB) 0.1 RL = 200Ω 0 −0.
PAGE 8
TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) At TA = +25°C, G = +2, and RL = 100Ω, unless otherwise specified. 10MHz HARMONIC DISTORTION vs LOAD RESISTANCE −60 −60 Harmonic Distortion (dBc) −65 −70 2nd Harmonic −75 −80 −85 3rd Harmonic G = +2 f = 10MHz VO = 2VPP See Figure 1 −90 −95 −100 50 3rd Harmonic −80 −85 G = +2 RL = 100Ω VO = 2VPP See Figure 1 −90 500 2.5 3.0 3.
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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) At TA = +25°C, G = +2, and RL = 100Ω, unless otherwise specified. 2-TONE, 3RD-ORDER INTERMODULATION INTERCEPT INPUT VOLTAGE vs CURRENT NOISE DENSITY 60 100 +5V Inverting Current Noise (internal) 22pA/√Hz Noninverting Current Noise 17.8pA/√Hz 10 Voltage Noise 50Ω Intercept Point (+dBm) Voltage Noise (nV/√Hz) Current Noise (pA/√Hz) PI PO OPA693 RF 300Ω 50 500Ω RG 300Ω −5V 40 +5V PI 30 50Ω PO OPA693 50Ω RF 300Ω 1.
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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) At TA = +25°C, G = +2, and RL = 100Ω, unless otherwise specified. CLOSED-LOOP OUTPUT IMPEDANCE PSRR vs FREQUENCY 10 –PSRR +5V 60 +PSRR 55 Output Impedance (Ω) 50 45 40 35 30 OPA693 50Ω –5V 300Ω 1 300Ω 25 0.
PAGE 11
TYPICAL CHARACTERISTICS: VS = ±5V (Cont.) At TA = +25°C, G = +2, and RL = 100Ω, unless otherwise specified.
PAGE 12
TYPICAL CHARACTERISTICS: VS = +5V At TA = +25°C, G = +2, and RL = 100Ω to VS/2, unless otherwise specified. SMALL-SIGNAL FREQUENCY RESPONSE 3 G = +1 1 6 G = +2 −1 5 Gain (dB) 0 G = −1 −2 2 1 −5 0 −6 −1 10 100 1000 VO = 2VPP See Figure 4 0 200 SMALL-SIGNAL BANDWIDTH vs SINGLE-SUPPLY VOLTAGE 800 RL = 150Ω −0.1 −0.2 RL = 75Ω 700 650 600 550 500 450 RL = 100Ω See Figure 4 See Figure 4 −0.
PAGE 13
TYPICAL CHARACTERISTICS: VS = +5V (Cont.) At TA = +25°C, G = +2, and RL = 100Ω to VS/2, unless otherwise specified. HARMONIC DISTORTION vs FREQUENCY G = +2 RL = 100Ω VO = 2VPP Harmonic Distortion (dBc) −60 −65 2nd Harmonic −75 −80 −85 −65 −70 2nd Harmonic −75 −80 −85 3rd Harmonic −90 −90 See Figure 4 −95 0.5 See Figure 4 −95 1 10 −55 0.
PAGE 14
APPLICATION INFORMATION WIDEBAND BUFFER OPERATION The OPA693 gives the exceptional AC performance of a wideband current-feedback op amp with a highly linear output stage. It features internal RF and RG resistors, making it a simple matter to select a gain of +2, +1 or –1 with no external resistors. Requiring only 13mA supply current, the OPA693’s output swings to within 1V of either supply with > 700MHz small signal bandwidth and > 300MHz delivering 7VPP into a 100Ω load.
PAGE 15
+5V +VS 0.1µF + 6.8µF 50Ω Source DIS VO OPA693 +5V RG 300Ω 6.8µF 604Ω 1000pF DIS VI 50Ω 60.4Ω VO 604Ω 100Ω OPA693 50Ω Load 50Ω Source + 0.1µF VS/2 RF 300Ω RF 300Ω VI RG 300Ω RM 60.4Ω 0.1µF −5V + 6.8µF 1000pF Figure 3. DC-Coupled, G = –1V/V, Bipolar-Supply Specification and Test Circuit. Figure 4. AC-Coupled, G = +2V/V, Single-Supply Specification and Test Circuit.
PAGE 16
SINGLE-SUPPLY ADC INTERFACE Most modern, high-performance ADCs (such as the Texas Instruments ADS8xx series) operate on a single +5V (or lower) power supply. It has been a considerable challenge for single-supply op amps to deliver a low distortion input signal at the ADC input for signal frequencies exceeding 5MHz. The high slew rate, exceptional output swing, and high linearity of the OPA693 make it an ideal single-supply ADC driver.
PAGE 17
WIDEBAND, DC-COUPLED, SINGLE-TO-DIFFERENTIAL CONVERSION The frequency response shown in Figure 7 for the improved gain of +1V/V buffer closely matches the inverting gain of –1V/V frequency response. Combining two OPA693s to give a +1 and –1 response will give a very broadband, DCcoupled, single-ended input to differential output conversion. Figure 9 shows this implementation where the input match is now set by RM in parallel with the RG resistor of the inverting stage.
PAGE 18
DESIGN-IN TOOLS DEMONSTRATION BOARDS Two printed circuit (PC) boards are available to assist in the initial evaluation of the circuit performance using the OPA693 in its two package styles. Both are available free as unpopulated PC boards delivered with descriptive documentation. The summary information for these boards is shown in Table I. PRODUCT PACKAGE DEMO BOARD PART NUMBER LITERATURE REQUEST NUMBER SO-8 DEM-OPA68xU SBOU009 SOT23-6 DEM-OPA6xxN SBOU010 OPA693ID OPA693IDBV TABLE I.
PAGE 19
DISTORTION PERFORMANCE The OPA693 provides good distortion performance into a 100Ω load on ±5V supplies. Relative to alternative solutions, the OPA693 holds much lower distortion at higher frequencies (> 20Mhz) than alternative solutions. Generally, until the fundamental signal reaches very high frequency or power levels, the 2nd harmonic will dominate the distortion with a negligible 3rd harmonic component. Focusing then on the 2nd harmonic, increasing the load impedance improves distortion directly.
PAGE 20
The exceptionally linear output stage (as illustrated by the high 3rd-order intermodulation intercept) and low thermal gradient induced errors for the OPA693 give an extremely linear output over large voltage swings and heavy loads. Figure 13 shows the tested deviation (in % of peak to peak) from linearity for a range of symmetrical output swings and loads. Below 4VPP, for either a 100Ω or a 500Ω load, the OPA693 delivers > 14-bit linear output response.
PAGE 21
Minimizing the resistance seen by the noninverting input will minimize the output DC error. For improved DC precision in a wideband low-gain amplifier, consider the OPA842 where a bipolar input is acceptable (low source resistance) or the OPA656 where a JFET input is required. DISABLE OPERATION The OPA693 provides an optional disable feature that can be used to reduce system power. If the V DIS control pin is left unconnected, the OPA693 will operate normally.
PAGE 22
BOARD LAYOUT GUIDELINES Achieving optimum performance with a high-frequency amplifier like the OPA693 requires careful attention to PC 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 can cause instability; on the noninverting input, it can react with the source impedance to cause unintentional bandlimiting.
PAGE 23
Revision History DATE REVISION PAGE SECTION 7/08 A 2 Abs Max Ratings DESCRIPTION Changed Storage Temperature Range from −40°C to +125C to −65°C to +125C. NOTE: Page numbers for previous revisions may differ from page numbers in the current version. OPA693 SBOS285A www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 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. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 17-Dec-2011 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) OPA693IDBVR SOT-23 DBV 6 3000 180.0 8.4 OPA693IDBVT SOT-23 DBV 6 250 180.0 8.4 Pack Materials-Page 1 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.2 3.1 1.39 4.0 8.0 Q3 3.2 3.1 1.39 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 17-Dec-2011 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA693IDBVR SOT-23 DBV 6 3000 210.0 185.0 35.0 OPA693IDBVT SOT-23 DBV 6 250 210.0 185.0 35.
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