Datasheet

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A2695

OPA2695

FEATURES

DESCRIPTION

APPLICATIONS

OPA2695 RELATED PRODUCTS

Z =R ||2R

I T G

1:1

1/2

OPA2695

500W

+5V

1/2

OPA2695

800W

500W

-5V

= G

500W

-65

-100

HarmonicDistortion(dBc)

-70

Frequency(MHz)

10 100

-75

-80

3rdHarmonic

-85

-90

-95

2ndHarmonic

G =10V/V

V =2V

R =800

O PP

OPA2695

www.ti.com

...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008

Dual, Ultra-Wideband, Current-Feedback

OPERATIONAL AMPLIFIER with Disable

• GAIN = +2V/V BANDWIDTH (850MHz)

The OPA2695 is a dual, very high bandwidth,

• GAIN = +8V/V BANDWIDTH (450MHz)

current-feedback op amp that combines exceptional

• OUTPUT VOLTAGE SWING: ± 4.1V

2900V/ µ s slew rate and low input voltage noise to

• ULTRA-HIGH SLEW RATE: 2900V/ µ s

deliver a precision, low-cost, high dynamic range

intermediate frequency (IF) amplifier. The device has

• DIFFERENTIAL 3RD-ORDER INTERCEPT:

been optimized for high gain operation, and the pin

> 40dBm (f < 140MHz, 800 Ω )

outs of the two available packages (QFN-16, SO-8)

• LOW POWER: 129mW/channel

have been optimized to provide symmetrical input

• LOW DISABLED POWER: 0.5mW/channel

and output paths. This architecture makes the

OPA2695 an ideal choice as a differential driver, such

as for a high-speed analog-to-digital converter (ADC).

• VERY WIDEBAND ADC DRIVERS

The OPA2695 low 12.9mA/channel supply current is

• LOW-COST PRECISION IF AMPLIFIERS

precisely trimmed at +25 ° C. This trim, along with a

low temperature drift, gives low system power over

• BROADBAND VIDEO LINE DRIVERS

temperature. System power may be further reduced

• PORTABLE INSTRUMENTS

with the optional disable control pin. Leaving this pin

• ACTIVE FILTERS

open, or holding it high, gives normal operation. If

• ARB WAVEFORM OUTPUT DRIVERS

pulled low, the OPA2695 supply current drops to less

than 200 µ A/channel. This power-saving feature,

along with exceptional single +5V operation, makes

the OPA2695 ideal for portable applications. The

OPA2695 is available in an SO-8 (without disable)

package or QFN-16 package (with disable).

SINGLES DUALS TRIPLES COMMENTS

Ultra-wideband

OPA695 — OPA3695 current-feedback operational

amplifier with disable

Wideband, high output

current, current-feedback

OPA691 OPA2691 OPA3691

Differential Driver Test Circuit

operational amplifier with

disable

Ultra-wideband, fixed-gain

OPA693 — OPA3693

operational amplifier

Ultra-wideband, low-power,

OPA694 OPA2694 — current-feedback operational

amplifier

Differential Harmonic Distortion

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.

2 PowerPAD is a trademark of Texas Instruments, Inc.

3 All 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 (41 pages)

PAGE 1
OP A2 69 OPA2695 5 OPA 2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 Dual, Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER with Disable FEATURES 1 • • • • • 23 • • GAIN = +2V/V BANDWIDTH (850MHz) GAIN = +8V/V BANDWIDTH (450MHz) OUTPUT VOLTAGE SWING: ±4.
PAGE 2
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... 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.
PAGE 3
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ELECTRICAL CHARACTERISTICS: VS = ±5V Boldface limits are tested at +25°C. At RF = 402Ω, RL = 100Ω, and G = +8V/V, unless otherwise noted.
PAGE 4
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS: VS = ±5V (continued) Boldface limits are tested at +25°C. At RF = 402Ω, RL = 100Ω, and G = +8V/V, unless otherwise noted.
PAGE 5
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ELECTRICAL CHARACTERISTICS: VS = +5V Boldface limits are tested at +25°C. At RF = 422Ω, RL = 100Ω to VS/2, and G = +8, unless otherwise noted.
PAGE 6
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS: VS = +5V (continued) Boldface limits are tested at +25°C. At RF = 422Ω, RL = 100Ω to VS/2, and G = +8, unless otherwise noted.
PAGE 7
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 TYPICAL CHARACTERISTICS: VS = ±5V At G = +8V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted.
PAGE 8
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: VS = ±5V (continued) At G = +8V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted.
PAGE 9
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 TYPICAL CHARACTERISTICS: VS = ±5V (continued) At G = +8V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted.
PAGE 10
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: VS = ±5V (continued) At G = +8V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted.
PAGE 11
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 TYPICAL CHARACTERISTICS: VS = ±5V (continued) At G = +8V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted.
PAGE 12
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: VS = ±5V (continued) At G = +8V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted.
PAGE 13
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 TYPICAL CHARACTERISTICS: VS = ±5V, Differential Operation At GD = 10V/V, RF = 500Ω, and RL = 800Ω, unless otherwise noted.
PAGE 14
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: VS = ±5V, Differential Operation (continued) At GD = 10V/V, RF = 500Ω, and RL = 800Ω, unless otherwise noted.
PAGE 15
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 TYPICAL CHARACTERISTICS: VS = 5V At G = +8V/V, RF = 348Ω, and RL = 100Ω, unless otherwise noted.
PAGE 16
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: VS = 5V (continued) At G = +8V/V, RF = 348Ω, and RL = 100Ω, unless otherwise noted. RECOMMENDED RS vs CAPACITIVE LOAD FREQUENCY RESPONSE vs CAPACITIVE LOAD 9 200 100 VO = 0.
PAGE 17
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 TYPICAL CHARCTERISTICS: VS = 5V, Differential Operation At GD = 10V/V, RF = 500Ω, and RL = 800Ω, unless otherwise noted. DIFFERENTIAL SMALL-SIGNAL FREQUENCY RESPONSE +2.5V 1 0 Normalized Gain (dB) 1/2 OPA2695 -2.
PAGE 18
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com TYPICAL CHARCTERISTICS: VS = 5V, Differential Operation (continued) At GD = 10V/V, RF = 500Ω, and RL = 800Ω, unless otherwise noted.
PAGE 19
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 APPLICATIONS INFORMATION WIDEBAND CURRENT-FEEDBACK OPERATION +5V The OPA2695 gives a new level of performance in wideband current-feedback op amps.
PAGE 20
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com ranges at both the input and the output. The circuit of Figure 70 establishes an input midpoint bias using a simple resistive divider from the +5V supply (two 806Ω resistors) to the noninverting input. The input signal is then ac-coupled into this midpoint voltage bias.
PAGE 21
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 Figure 71 shows the ac-coupled, single +5V supply, gain of –8V/V circuit configuration used as a basis for the +5V only Typical Characteristics. In this case, the midpoint dc bias on the noninverting input is also decoupled with an additional 0.1µF decoupling capacitor.
PAGE 22
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com WIDEBAND VIDEO MULTIPLEXING (QFN-16 Package Only) One common application for video speed amplifiers that include a disable pin is to wire multiple amplifier outputs together, then select one of several possible video inputs to source onto a single line.
PAGE 23
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 HIGH-SPEED ACTIVE FILTERS Wideband current-feedback op amps make ideal elements for implementing high-speed active filters where the amplifier is used as a fixed gain block inside a passive RC circuit network.
PAGE 24
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com DIFFERENTIAL I/O APPLICATIONS The OPA2695 offers very low third-order distortion terms with a dominant second-order distortion for the single amplifier operation.
PAGE 25
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 The two noninverting inputs provide an easy common-mode control input. This is particularly easy if the source is ac-coupled through either blocking caps or a transformer.
PAGE 26
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com DESIGN-IN TOOLS DEMONSTRATION FIXTURES Two printed circuit boards (PCBs) are available to assist in the initial evaluation of circuit performance using the OPA2695 in its two package options. Both of these are offered free of charge as unpopulated PCBs, delivered with a user’s guide.
PAGE 27
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 Where: NC = 1 + RF/RG = Noise Gain This formula is written in a loop gain analysis format, where the errors arising from a non-infinite open-loop gain are shown in the denominator.
PAGE 28
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com total feedback network impedance. This 82Ω load requires no more than 45mA output current to support the ±3.7V minimum output voltage swing specified for 100Ω loads. This minimal requirement is well below the minimum ±90mA specifications.
PAGE 29
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 In most op amps, increasing the output voltage swing increases harmonic distortion directly. The Typical Characteristics show the 2nd harmonic increasing at a little less than the expected 2x rate, while the 3rd harmonic increases at a little less than the expected 3x rate.
PAGE 30
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com voltage is higher than the 1.8nV/√Hz specification for the op amp voltage noise alone. This increased value reflects the noise added to the output by the inverting current noise times the feedback resistor.
PAGE 31
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 THERMAL ANALYSIS The OPA2695 does not require external heatsinking for most applications. Maximum desired junction temperature sets the maximum allowed internal power dissipation as described below. In no case should the maximum junction temperature be allowed to exceed +150°C.
PAGE 32
OPA2695 SBOS354A – APRIL 2008 – REVISED AUGUST 2008 ...................................................................................................................................................... www.ti.com wide traces (50mils to 100mils or 1.27mm to 2.54mm, respectively) should be used, preferably with ground and power planes opened up around them. Estimate the total capacitive load and set RS from the plot of Recommended RS vs Capacitive Load (Figure 17, Figure 37, Figure 61, and Figure 51).
PAGE 33
OPA2695 www.ti.com ...................................................................................................................................................... SBOS354A – APRIL 2008 – REVISED AUGUST 2008 Revision History Changes from Original (April 2008) to Revision A ..........................................................................................................
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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 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant OPA2695IDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 OPA2695IRGTR QFN RGT 16 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 OPA2695IRGTT QFN RGT 16 250 180.0 12.4 3.3 3.3 1.1 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) OPA2695IDR SOIC D 8 2500 367.0 367.0 35.0 OPA2695IRGTR QFN RGT 16 3000 367.0 367.0 35.0 OPA2695IRGTT QFN RGT 16 250 210.0 185.0 35.
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