OPA2673 OP A2 67 3 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 Dual, Wideband, High Output Current Operational Amplifier with Active Off-Line Control Check for Samples: OPA2673 FEATURES DESCRIPTION • The OPA2673 provides the high output current and low distortion required in emerging Power Line Modem driver applications. Operating on a single +12V supply, the OPA2673 consumes a low 16mA/ch quiescent current to deliver a very high 700mA output current.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 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. ESD damage can range from subtle performance degradation to complete device failure.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 ELECTRICAL CHARACTERISTICS: VS = ±6V At TA = +25°C, A0 = A1 = 0 (full power), G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 76 for ac performance only. Single channel specifications, except where noted.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com ELECTRICAL CHARACTERISTICS: VS = ±6V (continued) At TA = +25°C, A0 = A1 = 0 (full power), G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 76 for ac performance only. Single channel specifications, except where noted.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 ELECTRICAL CHARACTERISTICS: VS = ±6V (continued) At TA = +25°C, A0 = A1 = 0 (full power), G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 76 for ac performance only. Single channel specifications, except where noted. OPA2673IRGV MIN/MAX OVER TEMPERATURE TYP PARAMETER CONDITIONS +25°C +25°C (2) 0°C to 70°C (3) –40°C to +85°C (3) ±6.5 ±6.5 ±6.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±6V, Full Bias At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TYPICAL CHARACTERISTICS: VS = ±6V, Full Bias (continued) At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified. HARMONIC DISTORTION vs FREQUENCY -55 G = +4V/V VO = 2VPP RL = 100W -65 -70 -75 2nd Harmonic -80 -85 -90 3rd Harmonic -95 -100 1 10 -70 2nd Harmonic -75 -80 -85 -90 -95 3rd Harmonic -100 -105 Single Channel -105 0.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±6V, Full Bias (continued) At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TYPICAL CHARACTERISTICS: VS = ±6V, Full Bias (continued) At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified. COMPOSITE VIDEO (dG/df) TYPICAL DC DRIFT OVER TEMPERATURE 4.0 8 7 dG, df (%/°) 6 dG, Negative Video 5 G = +2V/V RF = 475W VS = ±6V 4 3 2 dG, Positive Video 1 3 -18.5 Input Offset Voltage 2.5 -19.0 2.0 -19.5 1.5 -20.0 1.0 -20.5 0.5 -21.0 Noninverting Bias Current 0 -21.5 -0.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±6V Differential, Full Bias At TA = +25°C, RF = 511Ω, RL = 100Ω Differential, GDIFF = +4V/V, and GCM = +1V/V, unless otherwise specified.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TYPICAL CHARACTERISTICS: VS = ±6V Differential, Full Bias (continued) At TA = +25°C, RF = 511Ω, RL = 100Ω Differential, GDIFF = +4V/V, and GCM = +1V/V, unless otherwise specified.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±6V, 75% Bias At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TYPICAL CHARACTERISTICS: VS = ±6V, 75% Bias (continued) At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±6V, 75% Bias (continued) At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified. CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY 10 Impedance (W) 1 0.1 0.01 0.001 10k 100k 1M 10M Frequency (Hz) Figure 46.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TYPICAL CHARACTERISTICS: VS = ±6V Differential, 75% Bias At TA = +25°C, RF = 511Ω, RL = 100Ω Differential, GDIFF = +4V/V, and GCM = +1V/V, unless otherwise specified.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±6V Differential, 75% Bias (continued) At TA = +25°C, RF = 511Ω, RL = 100Ω Differential, GDIFF = +4V/V, and GCM = +1V/V, unless otherwise specified.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TYPICAL CHARACTERISTICS: VS = ±6V, 50% Bias At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±6V, 50% Bias (continued) At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TYPICAL CHARACTERISTICS: VS = ±6V, 50% Bias (continued) At TA = +25°C, G = +4V/V, RF = 402Ω, and RL = 100Ω, unless otherwise specified. CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY 10 Impedance (W) 1 0.1 0.01 0.001 10k 100k 1M 10M Frequency (Hz) Figure 67.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com TYPICAL CHARACTERISTICS: VS = ±6V Differential, 50% Bias At TA = +25°C, RF = 511Ω, RL = 100Ω Differential, GDIFF = +4V/V, and GCM = +1V/V, unless otherwise specified.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TYPICAL CHARACTERISTICS: VS = ±6V Differential, 50% Bias (continued) At TA = +25°C, RF = 511Ω, RL = 100Ω Differential, GDIFF = +4V/V, and GCM = +1V/V, unless otherwise specified.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com APPLICATION INFORMATION WIDEBAND VIDEO MULTIPLEXING WIDEBAND CURRENT-FEEDBACK OPERATION The OPA2673 gives the exceptional ac performance of a wideband current-feedback op amp with a highly linear, high-power output stage. Requiring 16mA/ch quiescent current, the OPA2673 swings to within 1.1V of either supply rail and delivers in excess of 460mA at room temperature.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 Where two outputs are switched (see Figure 77), the output line is always under the control of one amplifier or the other as a result of the make-before-break disable timing. In this case, the switching glitches for two 0V inputs drop to less than 20mV.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com LINE DRIVER HEADROOM MODEL ±IP The first step in a driver design is to compute the peak-to-peak output voltage from the target specifications.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 TOTAL DRIVER POWER FOR LINE DRIVER APPLICATIONS The total internal power dissipation for the OPA2673 in a line driver application is the sum of the quiescent power and the output stage power. The OPA2673 holds a relatively constant quiescent current versus supply voltage—giving a power contribution that is simply the quiescent current times the supply voltage used (the supply voltage is greater than the solution given in Equation 9).
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com Figure 82 shows the small-signal frequency response analysis circuit for the OPA2673. Developing the transfer function for the circuit of Figure 82 gives Equation 13: VO VI VI a a 1+ = RF + RI 1 + VO Z(S) IERR IERR RF RG Figure 82.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 Characteristics. They differ in that the optimized values used in the Typical Characteristics are also correcting for board parasitic not considered in the simplified analysis leading to Equation 15. The values shown in Figure 83 give a good starting point for designs where bandwidth optimization is desired. Feedback Resistor (W) 600 500 400 300 200 0 5 10 15 20 Noise Gain Figure 83.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com frequency response at the load. Parasitic capacitive loads greater than 2pF can begin to degrade the performance of the OPA2673. Long PCB traces, unmatched cables, and connections to multiple devices can easily cause this value to be exceeded. Always consider this effect carefully, and add the recommended series resistor as close as possible to the OPA2673 output pin (see the Board Layout Guidelines section).
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 Dividing this expression by the noise gain [NG = (1 + RF/RG)] gives the equivalent input-referred spot noise voltage at the noninverting input, as shown in Equation 17.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com Power Control Operation The OPA2673 provides a power control feature that may be used to reduce system power. The four modes of operation for this power control feature are 100% bias, 75% bias, 50% bias, and power shutdown. These four operating modes are set through two logic lines A0 and A1. Table 3 shows the different modes of operation. Table 3.
OPA2673 www.ti.com SBOS382F – JUNE 2008 – REVISED MAY 2010 BOARD LAYOUT GUIDELINES Achieving optimum performance with a high-frequency amplifier such as the OPA2673 requires careful attention to board layout parasitic and external component types. Recommendations that optimize performance include: a) Minimize parasitic capacitance to any ac ground for all of the signal I/O pins.
OPA2673 SBOS382F – JUNE 2008 – REVISED MAY 2010 www.ti.com e) Socketing a high-speed part such as the OPA2673 is not recommended. The additional lead length and pin-to-pin capacitance introduced by the socket can create an extremely troublesome parasitic network, which can make it almost impossible to achieve a smooth, stable frequency response. Best results are obtained by soldering the OPA2673 directly onto the board.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 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 OPA2673IRGVR VQFN RGV 16 2500 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 OPA2673IRGVT VQFN RGV 16 250 180.0 12.4 4.25 4.25 1.15 8.0 12.
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA2673IRGVR VQFN RGV 16 2500 367.0 367.0 35.0 OPA2673IRGVT VQFN RGV 16 250 210.0 185.0 35.
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