Very Low-Power, Current Feedback Operational …

1 OPA. 683. OPA683. OPA68. 3. SBOS221E NOVEMBER 2001 REVISED JULY 2008. Very Low-Power, Current Feedback Operational AMPLIFIER With Disable FEATURES APPLICATIONS. REDUCED BANDWIDTH CHANGE VERSUS GAIN LOW POWER BROADCAST VIDEO DRIVERS. 150 MHz BANDWIDTH G = +2 EQUALIZING FILTERS. > 90 MHz BANDWIDTH TO GAIN > +10 SAW FILTER HIGH GAIN POST AMPLIFIERS. LOW DISTORTION: < 69dBc at 5 MHz SHORT LOOP ADSL CO DRIVERS. HIGH OUTPUT Current : 110mA MULTICHANNEL SUMMING AMPLIFIERS. SINGLE +5V TO +12V SUPPLY OPERATION PROFESSIONAL CAMERAS. DUAL TO 6V SUPPLY OPERATION ADC INPUT DRIVERS. LOW SUPPLY Current : LOW SHUTDOWN Current : 100 A. have greater bandwidth, and low-power line drivers to meet the DESCRIPTION demanding requirements of studio cameras and broadcast video. The OPA683 provides a new level of performance in very low- The output capability for the OPA683 also sets a new mark in power, wideband, Current Feedback amplifiers.

2 This CFBplus ampli- performance for very low-power Current Feedback amplifiers. De- fier is among the first to use an internally closed-loop input buffer livering a full 4 VPP swing on 5V supplies, the OPA683 also has stage that enhances performance significantly over earlier low- the output Current to support this swing into a 100 load. This power CFB amplifiers. While retaining the benefits of very low minimal output headroom requirement is complemented by a power operation, this new architecture provides many of the similar input stage headroom giving exceptional capability for advantages of a more ideal CFB amplifier. The closed-loop input single +5V operation. stage buffer gives a very low and linearized impedance path at the inverting input to sense the Feedback error Current . This improved The OPA683's low supply Current is precisely trimmed at inverting input impedance gives exceptional bandwidth retention to 25 C.

3 This trim, along with low shift over temperature and supply much higher gains and improved harmonic distortion over earlier voltage, gives a very robust design over a wide range of operating solutions limited by inverting input linearity. Beyond simple high conditions. System power may be further reduced by using the gain applications, the OPA683 CFBplus amplifier can allow the gain optional disable control pin. Leaving this disable pin open, or holding setting element to be set with considerable freedom from amplifier it HIGH, gives normal operation. If pulled LOW, the OPA683 supply bandwidth interaction. This allows frequency response peaking Current drops to less than 100 A while the I/O pins go to a high elements to be added, multiple input inverting summing circuits to impedance state. V+ OPA683 BANDWIDTH vs GAIN. 9. G=2. 6. G=5. 3. Normalized Gain (dB).

4 +. VO. 0. 3. V Z(S) IERR 6. 9. IERR G = 10. 12. RF G = 20. 15. G = 50. 18. RF = G = 100. RG 21. Low-Power Amplifier 1 10 100 200. Frequency (MHz). Patent No. 6,724,260. 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. All trademarks are the property of their respective owners. PRODUCTION DATA information is Current as of publication date. Copyright 2001-2008, Texas Instruments Incorporated Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. ABSOLUTE MAXIMUM RATINGS(1) ELECTROSTATIC. Power Supply .. Internal Power Dissipation .. See Thermal Information DISCHARGE SENSITIVITY.

5 Differential Input Voltage .. This integrated circuit can be damaged by ESD. Texas Instru- Input Voltage Range .. VS ments recommends that all integrated circuits be handled with Storage Temperature Range: ID, IDBV .. 65 C to +125 C appropriate precautions. Failure to observe proper handling Lead Temperature (soldering, 10s) .. +300 C. Junction Temperature (TJ ) .. +175 C. and installation procedures can cause damage. NOTE: (1) Stresses above those listed under Absolute Maximum Ratings . ESD damage can range from subtle performance degradation to may cause permanent damage to the device. Exposure to absolute maximum complete device failure. Precision integrated circuits may be more conditions for extended periods may affect device reliability. susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

6 OPA683 RELATED PRODUCTS. SINGLES DUALS TRIPLES QUADS FEATURES. OPA684 OPA2683 OPA3684 OPA4684 Low-Power CFBplus OPA691 OPA2691 OPA3691 High Slew Rate CFB. OPA685 > 500 MHz CFB. PACKAGE/ORDERING INFORMATION(1). SPECIFIED. PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT. PRODUCT PACKAGE-LEAD DESIGNATOR RANGE MARKING NUMBER MEDIA, QUANTITY. OPA683 SO-8 D 40 C to +85 C OPA683D OPA683ID Rails,100. " " " " " OPA683 IDR Tape and Reel, 2500. OPA683 SOT23-6 DBV 40 C to +85 C A83 OPA683 IDBVT Tape and Reel, 250. " " " " " OPA683 IDBVR Tape and Reel, 3000. NOTE: (1) For the most Current package and ordering information, see the Package Option Addendum located at the end of this document, or see the TI website at PIN CONFIGURATION. Top View SO-8 Top View SOT23-6. Output 1 6 +VS. VS 2 5 DIS. NC 1 8 DIS. Noninverting Input 3 4 Inverting Input Inverting Input 2 7 +VS.

7 Noninverting Input 3 6 Output 6 5 4. VS 4 5 NC. NC = No Connection A83. 1 2 3. Pin Orientation/Package Marking 2 OPA683. SBOS221E. ELECTRICAL CHARACTERISTICS: VS = 5V. Boldface limits are tested at +25 C. RF = , RL = 1k , and G = +2 (see Figure 1 for AC performance only), unless otherwise noted. OPA683ID, IDBV. TYP MIN/MAX OVER TEMPERATURE. 0 C to 40 C to MIN/ TEST. PARAMETER CONDITIONS +25 C +25 C(1) 70 C(2) +85 C(2) UNITS MAX LEVEL(3). AC PERFORMANCE (See Figure 1). Small-Signal Bandwidth (VO = ) G = +1, RF = 200 MHz typ C. G = +2, RF = 150 124 121 117 MHz min B. G = +5, RF = 121 MHz typ C. G = +10, RF = 94 MHz typ B. G = +20, RF = 72 MHz typ C. Bandwidth for Gain Flatness G = +2, VO = , RF = 37 15 14 14 MHz min B. Peaking at a Gain of +1 RF = , VO = dB max B. Large-Signal Bandwidth G = +2, VO = 4 VPP 63 MHz typ C. Slew Rate G = 1, VO = 4V Step (see Figure 2) 540 450 450 430 V/ s min B.

8 G = +2,VO = 4V Step 400 345 338 336 V/ s min B. Rise-and-Fall Time G = +2, VO = Step ns typ C. G = +2, VO = 4 VStep ns typ C. Harmonic Distortion G = +2, f = 5 MHz, VO = 2 VPP. 2nd-Harmonic RL = 100 63 54 54 54 dBc max B. RL 1k 65 55 55 55 dBc max B. 3rd-Harmonic RL = 100 67 62 62 62 dBc max B. RL 1k 74 67 66 66 dBc max B. Input Voltage Noise f > 1 MHz nV/ Hz max B. Noninverting Input Current Noise f > 1 MHz pA/ Hz max B. Inverting Input Current Noise f > 1 MHz pA/ Hz max B. Differential Gain G = +2, NTSC, VO = , RL = 150 % typ C. Differential Phase G = +2, NTSC, VO = , RL = 150 deg typ C. DC PERFORMANCE(4). Open-Loop Transimpedance Gain (ZOL) VO = 0V, RL = 1k 700 300 270 250 k min A. Input Offset Voltage VCM = 0V mV max A. Average Offset Voltage Drift VCM = 0V 12 12 V/ C max B. Noninverting Input Bias Current VCM = 0V A max A. Average Noninverting Input Bias Current Drift VCM = 0V 15 15 nA/ C max B.

9 Inverting Input Bias Current VCM = 0V 10 11 A max A. Average Inverting Input Bias Current Drift VCM = 0V 20 20 nA /C max B. INPUT. Common-Mode Input Range(5) (CMIR) V min A. Common-Mode Rejection Ratio (CMRR) VCM = 0V 60 53 52 52 dB min A. Noninverting Input Impedance 50 2 k || pF typ C. Inverting Input Resistance (RI) Open-Loop, DC typ C. OUTPUT. Voltage Output Swing 1k Load V min A. Current Output, Sourcing VO = 0 150 130 125 120 mA min A. Current Output, Sinking VO = 0 110 100 95 90 mA min A. Closed-Loop Output Impedance G = +2, f = 100kHz typ C. DISABLE (Disabled LOW). Power-Down Supply Current (+VS) VDIS = 0 100 150 170 180 A typ C. Disable Time VIN = +1, See Figure 1 60 ms typ C. Enable Time VIN = +1, See Figure 1 40 ns typ C. Off Isolation G = +2, 5 MHz 70 dB typ C. Output Capacitance in Disable pF typ C. Turn On Glitch G = +2, RL = 150 , VIN = 0 70 mV typ C.

10 Turn Off Glitch G = +2, RL = 150 , VIN = 0 20 mV typ C. Enable Voltage V min A. Disable Voltage V max A. Control Pin Input Bias Current (DIS) VDIS = 0V 80 120 130 135 A max A. POWER SUPPLY. Specified Operating Voltage 5 V typ C. Maximum Operating Voltage Range 6 6 6 V max A. Minimum Operating Voltage Range V min C. Max Quiescent Current VS = 5V mA max A. Min Quiescent Current VS = 5V mA min A. Power-Supply Rejection Ratio ( PSRR) Input Referred 62 55 54 54 dB typ A. TEMPERATURE RANGE. Specification: D, DBV 40 to +85 C typ C. Thermal Resistance, JA Junction-to-Ambient D SO-8 125 C/W typ C. DBV SOT-23-6 150 C/W typ C. NOTES: (1) Junction temperature = ambient for 25 C tested specifications. (2) Junction temperature = ambient at low temperature limit: junction temperature = ambient +2 C at high temperature limit for over temperature tested specifications.