LM6132 Dual and LM6134 Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers General Description Features (For 5V Supply, Typ Unless Noted) The LM6132/34 provides new levels of speed vs power performance in applications where low voltage supplies or power limitations previously made compromise necessary. With only 360 mA/amp supply current, the 10 MHz gain-bandwidth of this device supports new portable applications where higher power devices unacceptably drain battery life. The LM6132/34 can be driven by voltages that exceed both power supply rails, thus eliminating concerns over exceeding the common-mode voltage range. The rail-to-rail output swing capability provides the maximum possible dynamic range at the output. This is particularly important when operating on low supply voltages. The LM6132/34 can also drive large capacitive loads without oscillating. Operating on supplies from 2.7V to over 24V, the LM6132/34 is excellent for a very wide range of applications, from battery operated systems with large bandwidth requirements to high speed instrumentation. Y Y Y Y Y Y Y Y Y l Rail-to-Rail input CMVR b 0.25V to 5.25V Rail-to-Rail output swing 0.01V to 4.99V High gain-bandwidth, 10 MHz at 20 kHz Slew rate 12 V/ms Low supply current 360 mA/Amp Wide supply range 2.7V to over 24V CMRR 100 dB Gain 100 dB with RL e 10k PSRR 82 dB Applications Y Y Y Y Y Battery operated instrumentation Instrumentation Amplifiers Portable scanners Wireless communications Flat panel display driver Connection Diagrams 14-Pin DIP/SO 8-Pin DIP/SO TL/H/12349 - 1 Top View TL/H/12349 - 2 Top View Ordering Information Package Temperature Range Industrial, b40 C to a 85 C NSC Drawing Transport Media 8-Pin Molded DIP LM6132AIN, LM6132BIN N08E Rails 8-Pin Small Outline LM6132AIM, LM6132BIM M08A Rails LM6132AIMX, LM6132BIMX M08A Tape and Reel 14-Pin Molded DIP LM6134AIN, LM6134BIN N14A Rails 14-Pin Small Outline LM6134AIM, LM6134BIM M14A Rails LM6134AIMX, LM6134BIMX M14A Tape and Reel C1996 National Semiconductor Corporation TL/H/12349 RRD-B30M66/Printed in U. S. A. http://www.national.com LM6132 Dual and LM6134 Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers June 1996 Absolute Maximum Ratings (Note 1) Operating Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage Junction Temperature Range LM6132, LM6134 ESD Tolerance (Note 2) Differential Input Voltage Voltage at Input/Output Pin Thermal resistance (iJA) N Package, 8-pin Molded DIP M Package, 8-pin Surface Mount N Package, 14-pin Molded DIP M Package, 14-pin Surface Mount 2500V 15V (V a ) a 0.3V, (Vb)b0.3V Supply Voltage (V a - Vb) Current at Input Pin Current at Output Pin (Note 3) Current at Power Supply Pin Lead Temp. (soldering, 10 sec.) Storage Temperature Range Junction Temperature (Note 4) 35V g 10 mA 1.8V s VS s 24V b 40 C s TJ s a 85 C 115 C/W 193 C/W 81 C/W 126 C/W g 25 mA 50 mA 260 C b 65 C to a 150 C 150 C 5.0V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25 C, V a e 5.0V, Vb e 0V, VCM e VO e V a /2 and RL l 1 MX to VS/2. Boldface limits apply at the temperature extremes Symbol Parameter VOS Input Offset Voltage TCVOS Input Offset Voltage Average Drift IB Input Bias Current IOS Input Offset Current RIN Input Resistance, CM CMRR Common Mode Rejection Ratio PSRR Power Supply Rejection Ratio VCM Input Common-Mode Voltage Range AV Large Signal Voltage Gain http://www.national.com Conditions Typ (Note 5) LM6134AI LM6132AI Limit (Note 6) LM6134BI LM6132BI Limit (Note 6) Units 0.25 2 4 6 8 mV max 5 0V s VCM s 5V 110 3.4 mV/C 140 300 180 350 nA max 30 50 30 50 nA max 75 70 104 MX 0V s VCM s 4V 100 75 70 0V s VCM s 5V 80 60 55 60 55 82 78 75 78 75 g 2.5V s VS s g 12V RL e 10k 2 b 0.25 0 0 5.25 5.0 5.0 100 25 8 15 6 dB min V V/mV min 5.0V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25 C, V a e 5.0V, Vb e 0V, VCM e VO e V a /2 and RL l 1 MX to VS/2. Boldface limits apply at the temperature extremes (Continued) Symbol VO Parameter Output Swing Conditions 100k Load 10k Load 5k Load ISC Output Short Circuit Current Sourcing Sinking IS Supply Current Per Amplifier Typ (Note 5) LM6134AI LM6132AI Limit (Note 6) LM6134BI LM6132BI Limit (Note 6) Units 4.992 4.98 4.93 4.98 4.93 V min 0.007 0.017 0.019 0.017 0.019 V max 4.952 4.94 4.85 4.94 4.85 V min 0.032 0.07 0.09 0.07 0.09 V max 4.923 4.90 4.85 4.90 4.85 V min 0.051 0.095 0.12 0.095 0.12 V max 4.3 2 2 mA min 4.6 1.8 1.8 mA min 360 400 450 400 450 mA max 5.0V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25 C, V a e 5.0V, Vb e 0V, VCM e VO e V a /2 and RL l 1 MX to VS/2. Boldface limits apply at the temperature extremes Symbol Parameter Conditions Typ (Note 5) LM6134AI LM6132AI Limit (Note 6) LM6134BI LM6132BI Limit (Note 6) Units 14 8 7 8 7 V/ms min 10 7.4 7 7.4 7 MHz min SR Slew Rate g 4V @ VS e g 6V RS k 1 kX GBW Gain-Bandwidth Product f e 20 kHz im Phase Margin RL e 10k 33 deg Gm Gain Margin RL e 10k 10 dB Input Referred Voltage Noise f e 1 kHz Input Referred Current Noise f e 1 kHz en in 27 0.18 3 nV 0Hz pA 0Hz http://www.national.com 2.7V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25 C, V a e 2.7V, Vb e 0V, VCM e VO e V a /2 and RL l 1 MX to VS/2. Boldface limits apply at the temperature extreme Symbol Parameter Conditions Typ (Note 5) LM6134AI LM6132AI Limit (Note 6) LM6134BI LM6132BI Limit (Note 6) Units 0.12 2 8 6 12 mV max VOS Input Offset Voltage IB Input Bias Current IOS Input Offset Current 2.8 nA RIN Input Resistance 134 MX CMRR Common Mode Rejection Ratio 0V s VCM s 2.7V 82 dB PSRR Power Supply Rejection Ratio g 1.35V s VS s g 12V 80 dB VCM Input Common-Mode Voltage Range 0V s VCM s 2.7V 90 nA 2.7 2.7 0 0 V AV Large Signal Voltage Gain RL e 10k 100 VO Output Swing RL e 10k 0.03 0.08 0.112 0.08 0.112 V max 2.66 2.65 2.25 2.65 2.25 V min IS Supply Current Per Amplifier V/mV 330 mA 2.7V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25 C, V a e 2.7V, Vb e 0V, VCM e VO e V a /2 and RL l 1 MX to VS/2. Symbol Typ (Note 5) LM6134AI LM6132AI Limit (Note 6) LM6134BI LM6132BI Limit (Note 6) Parameter Conditions GBW Gain-Bandwidth Product RL e 10k, f e 20 kHz 7 MHz im Phase Margin RL e 10k 23 deg Gm Gain Margin 12 dB http://www.national.com 4 Units 24V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25 C, V a e 24V, Vb e 0V, VCM e VO e V a /2 and RL l 1 MX to VS/2. Boldface limits apply at the temperature extreme Symbol Parameter Conditions Typ (Note 5) LM6134AI LM6132AI Limit (Note 6) LM6134BI LM6132BI Limit (Note 6) Units 1.7 3 5 7 9 mV max VOS Input Offset Voltage IB Input Bias Current IOS Input Offset Current 4.8 nA RIN Input Resistance 210 MX CMRR Common Mode Rejection Ratio 0V s VCM s 24V 80 dB PSRR Power Supply Rejection Ratio 2.7V s VS s 24V 82 dB VCM Input Common-Mode Voltage Range AV Large Signal Voltage Gain RL e 10k 102 VO Output Swing RL e 10k 0.075 0.15 0.15 V max 23.86 23.8 23.8 V min 390 450 490 450 490 mA max IS Supply Current 0V s VCM s 24V 125 Per Amplifier nA b 0.25 0 0 V min 24.25 24 24 V max V/mV 24V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ e 25 C, V a e 24V, Vb e 0V, VCM e VO e V a /2 and RL l 1 MX to VS/2. Symbol Parameter Conditions Typ (Note 5) LM6134AI LM6132AI Limit (Note 6) LM6134BI LM6132BI Limit (Note 6) Units GBW Gain-Bandwidth Product RL e 10k, f e 20 kHz 11 MHz im Phase Margin RL e 10k 23 deg Gm Gain Margin RL e 10k 12 dB Total Harmonic Distortion and Noise AV e a 1, VO e 20VP-P f e 10 kHz 0.0015 % THD a N Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical characteristics. Note 2: Human body model, 1.5 kX in series with 100 pF. Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150 C. Note 4: The maximum power dissipation is a function of TJ(max), iJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD e (TJ(max) b TA)/iJA. All numbers apply for packages soldered directly into a PC board. Note 5: Typical Values represent the most likely parametric norm. Note 6: All limits are guaranteed by testing or statistical analysis. 5 http://www.national.com Typical Performance Characteristics TA e 25 C, RL e 10 kX unless otherwise specified Supply Current vs Supply Voltage Offset Voltage vs Supply Voltage TL/H/12349-3 dVOS vs VCM TL/H/12349 - 5 dVOS vs VCM TL/H/12349-7 Ibias vs VCM TL/H/12349 - 8 TL/H/12349-10 http://www.national.com TL/H/12349 - 11 TL/H/12349 - 14 6 TL/H/12349 - 9 Input Bias Current vs Supply Voltage Pos PSSR vs Frequency TL/H/12349-13 TL/H/12349 - 6 Ibias vs VCM Ibias vs VCM Neg PSRR vs Frequency dVOS vs VCM TL/H/12349 - 12 Typical Performance Characteristics TA e 25 C, RL e 10 kX unless otherwise specified (Continued) dVOS vs Output Voltage dVOS vs Output Voltage TL/H/12349-15 CMRR vs Frequency TL/H/12349 - 16 TL/H/12349 - 17 Output Voltage vs Sinking Current TL/H/12349-18 Output Voltage vs Sinking Current dVOS vs Output Voltage Output Voltage vs Sinking Current TL/H/12349 - 19 TL/H/12349 - 20 Output Voltage vs Sourcing Current TL/H/12349-21 Output Voltage vs Sourcing Current TL/H/12349 - 22 TL/H/12349 - 23 Output Voltage vs Sourcing Current TL/H/12349 - 24 7 http://www.national.com Typical Performance Characteristics TA e 25 C, RL e 10 kX unless otherwise specified (Continued) Noise Voltage vs Frequency Noise Current vs Frequency TL/H/12349 - 38 TL/H/12349-25 Gain and Phase vs Frequency Gain and Phase vs Frequency TL/H/12349-28 TL/H/12349 - 29 GBW vs Supply Voltage at 20 kHz TL/H/12349 - 31 http://www.national.com 8 NF vs Source Resistance TL/H/12349 - 39 Gain and Phase vs Frequency TL/H/12349 - 30 LM6132/34 Application Hints Slew Rate vs Differential VIN VS e g 12V The LM6132 brings a new level of ease of use to opamp system design. With greater than rail-to-rail input voltage range concern over exceeding the common-mode voltage range is eliminated. Rail-to-rail output swing provides the maximum possible dynamic range at the output. This is particularly important when operating on low supply voltages. The high gain-bandwidth with low supply current opens new battery powered applications, where high power consumption, previously reduced battery life to unacceptable levels. To take advantage of these features, some ideas should be kept in mind. TL/H/12349 - 40 ENHANCED SLEW RATE Unlike most bipolar opamps, the unique phase reversal prevention/speed-up circuit in the input stage eliminates phase reversal and allows the slew rate to be very much a function of the input signal amplitude. FIGURE 2 This effect is most noticeable at higher supply voltages and lower gains where incoming signals are likely to be large. This speed-up action adds stability to the system when driving large capacitive loads. Figure 1 shows how excess input signal is routed around the input collector-base junctions directly to the current mirrors. The LM6132/34 input stage converts the input voltage change to a current change. This current change drives the current mirrors through the collectors of Q1-Q2, Q3 - Q4 when the input levels are normal. If the input signal exceeds the slew rate of the input stage and the differential input voltage rises above a diode drop, the excess signal bypasses the normal input transistors, (Q1 - Q4), and is routed in correct phase through the two additional transistors, (Q5, Q6), directly into the current mirrors. This rerouting of excess signal allows the slew-rate to increase by a factor of 10 to 1 or more. (See Figure 2 .) As the overdrive increases, the opamp reacts better than a conventional opamp. Large fast pulses will raise the slewrate to around 25V to 30V/ms. DRIVING CAPACITIVE LOADS Capacitive loads decrease the phase margin of all opamps. This is caused by the output resistance of the amplifier and the load capacitance forming an R-C phase lag network. This can lead to overshoot, ringing and oscillation. Slew rate limiting can also cause additional lag. Most opamps with a fixed maximum slew-rate will lag further and further behind when driving capacitive loads even though the differential input voltage raises. With the LM6132, the lag causes the slew rate to raise. The increased slew-rate keeps the output following the input much better. This effectively reduces phase lag. After the output has caught up with the input, the differential input voltage drops down and the amplifier settles rapidly. TL/H/12349 - 36 FIGURE 1 9 http://www.national.com LM6132/34 Application Hints (Continued) These features allow the LM6132 to drive capacitive loads as large as 500 pF at unity gain and not oscillate. The scope photos (Figure 3 and 4 ) above show the LM6132 driving a 500 pF load. In Figure 3 , the lower trace is with no capacitive load and the upper trace is with a 500 pF load. Here we are operating on g 12V supplies with a 20 Vp-p pulse. Excellent response is obtained with a Cf of 39 pF. In Figure 4 , the supplies have been reduced to g 2.5V, the pulse is 4 Vp-p and Cf is 39 pF. The best value for the compensation capacitor should be established after the board layout is finished because the value is dependent on board stray capacity, the value of the feedback resistor, the closed loop gain and, to some extent, the supply voltage. Another effect that is common to all opamps is the phase shift caused by the feedback resistor and the input capacitance. This phase shift also reduces phase margin. This effect is taken care of at the same time as the effect of the capacitive load when the capacitor is placed across the feedback resistor. The circuit shown in Figure 5 was used for these scope photos. TL/H/12349 - 43 FIGURE 5 Figure 6 shows a method for compensating for load capacitance (Co) effects by adding both an isolation resistor Ro at the output and a feedback capacitor CF directly between the output and the inverting input pin. Feedback capacitor CF compensates for the pole introduced by Ro and Co, minimizing ringing in the output waveform while the feedback resistor RF compensates for dc inaccuracies introduced by Ro. Depending on the size of the load capacitance, the value of Ro is typically chosen to be between 100X to 1 kX. TL/H/12349 - 37 FIGURE 6 TL/H/12349-45 FIGURE 3 TL/H/12349-42 FIGURE 4 http://www.national.com 10 Typical Applications FLAT PANEL DISPLAY BUFFERING Three features of the LM6132/34 make it a superb choice for TFT LCD applications. First, its low current draw (360 mA per amplifier @ 5V) makes it an ideal choice for battery powered applications such as in laptop computers. Second, since the device operates down to 2.7V, it is a natural choice for next generation 3V TFT panels. Last, but not least, the large capacitive drive capability of the LM6132 comes in very handy in driving highly capacitive loads that are characteristic of LCD display drivers. The large capacitive drive capability of the LM6132/34 allows it to be used as buffers for the gamma correction reference voltage inputs of resistor-DAC type column (Source) drivers in TFT LCD panels. This amplifier is also useful for buffering only the center reference voltage input of Capacitor-DAC type column (Source) drivers such as the LMC750X series. Since for VGA and SVGA displays, the buffered voltages must settle within approximately 4 ms, the well known technique of using a small isolation resistor in series with the amplifier's output very effectively dampens the ringing at the output. With its wide supply voltage range of 2.7V to 24V), the LM6132/34 can be used for a diverse range of applications. The system designer is thus able to choose a single device type that serves many sub-circuits in the system, eliminating the need to specify multiple devices in the bill of materials. Along with its sister parts, the LM6142 and LM6152 that have the same wide supply voltage capability, choice of the LM6132 in a design eliminates the need to search for multiple sources for new designs. 3 OPAMP INSTRUMENTATION AMP WITH RAIL-TORAIL INPUT AND OUTPUT Using the LM6134, a 3 opamp instrumentation amplifier with rail-to-rail inputs and rail to rail output can be made. These features make these instrumentation amplifiers ideal for single supply systems. Some manufacturers use a precision voltage divider array of 5 resistors to divide the common-mode voltage to get an input range of rail-to-rail or greater. The problem with this method is that it also divides the signal, so to even get unity gain, the amplifier must be run at high closed loop gains. This raises the noise and drift by the internal gain factor and lowers the input impedance. Any mismatch in these precision resistors reduces the CMR as well. Using the LM6134, all of these problems are eliminated. In this example, amplifiers A and B act as buffers to the differential stage (Figure 7). These buffers assure that the input impedance is over 100 MX and they eliminate the requirement for precision matched resistors in the input stage. They also assure that the difference amp is driven from a voltage source. This is necessary to maintain the CMR set by the matching of R1-R2 with R3-R4. TL/H/12349 - 44 FIGURE 7 11 http://www.national.com Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.150x Wide) Molded Small Outline Package, JEDEC Order Number LM6132AIM, LM6132BIM, LM6132AIMX or LM6132BIMX NS Package Number M08A http://www.national.com 12 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead (0.300x Wide) Molded Small Outline Package, JEDEC Order Number LM6134AIM, LM6134BIM, LM6134AIMX or LM6134BIMX NS Package Number M14A 8-Lead (0.300x Wide) Molded Dual-In-Line Package Order Number LM6132AIN, LM6132BIN NS Package Number N08E 13 http://www.national.com LM6132 Dual and LM6134 Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead (0.300x Wide) Molded Dual-In-Line Package Order Number LM6134AIN, LM6134BIN NS Package Number N14A LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. 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