LM6132,LM6134 LM6132/LM6134 Dual and Quad Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers Literature Number: SNOS751C LM6132/LM6134 Dual and Quad Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers General Description Features 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 A/amp supply current, the 10 MHz gainbandwidth of this device supports new portable applications where higher power devices unacceptably drain battery life. (For 5V Supply, Typ Unless Noted) n Rail-to-Rail input CMVR -0.25V to 5.25V n Rail-to-Rail output swing 0.01V to 4.99V n High gain-bandwidth, 10 MHz at 20 kHz n Slew rate 12 V/s n Low supply current 360 A/Amp n Wide supply range 2.7V to over 24V n CMRR 100 dB n Gain 100 dB with RL = 10k n PSRR 82 dB 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. Applications n n n n n Battery operated instrumentation Instrumentation Amplifiers Portable scanners Wireless communications Flat panel display driver Connection Diagrams 8-Pin DIP/SO 14-Pin DIP/SO 01234901 Top View 01234902 Top View Ordering Information Package Temperature Range Transport NSC Industrial, -40C to +85C Media Drawing 8-Pin Molded DIP LM6132AIN, LM6132BIN Rails N08E 8-Pin Small Outline LM6132AIM, LM6132BIM Rails M08A M08A LM6132AIMX, LM6132BIMX Tape and Reel 14-Pin Molded DIP LM6134AIN, LM6134BIN Rails N14A 14-Pin Small Outline LM6134AIM, LM6134BIM Rails M14A LM6134AIMX, LM6134BIMX Tape and Reel M14A (c) 2004 National Semiconductor Corporation DS012349 www.national.com LM6132 and LM6134 Dual and Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers November 2004 LM6132/LM6134 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. ESD Tolerance (Note 2) 2500V Differential Input Voltage 15V Voltage at Input/Output Pin Junction Temperature Range Thermal resistance (JA) N Package, 8-pin Molded DIP 35V Current at Output Pin (Note 3) Current at Power Supply Pin 50 mA Lead Temp. (soldering, 10 sec.) 260C Storage Temperature Range 115C/W M Package, 8-pin Surface Mount 10 mA 25 mA Current at Input Pin -40C TJ +85C LM6132, LM6134 (V+)+0.3V, (V-)-0.3V Supply Voltage (V+-V-) 1.8V V+ 24V Supply Voltage 193C/W N Package, 14-pin Molded DIP 81C/W M Package, 14-pin Surface Mount 126C/W -65C to +150C Junction Temperature (Note 4) 150C 5.0V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 5.0V, V- = 0V, VCM = VO = V+/2 and RL > 1 M to V+/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 Conditions LM6134BI LM6132AI LM6132BI Limit Limit (Note 6) (Note 6) 2 4 6 8 110 140 300 180 350 nA max 3.4 30 50 30 50 nA max Typ (Note 5) 0.25 5 0V VCM 5V 104 75 70 75 70 0V VCM 5V 80 60 55 60 55 2.5V V+ 12V 82 78 75 78 75 RL = 10k VO Output Swing 100k Load 10k Load 5k Load 2 mV max M 100 Large Signal Voltage Gain Units V/C 0V VCM 4V AV www.national.com LM6134AI dB min dB min -0.25 0 0 5.25 5.0 5.0 100 25 8 15 6 V/mV min 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 V (Continued) Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 5.0V, V- = 0V, VCM = VO = V+/2 and RL > 1 M to V+/2. Boldface limits apply at the temperature extremes Symbol ISC Parameter Output Short Circuit Current LM6132 Conditions Sourcing Sinking ISC Output Short Circuit Current LM6134 Sourcing Sinking IS Supply Current Per Amplifier Typ (Note 5) LM6134AI LM6134BI LM6132AI LM6132BI Limit Limit Units (Note 6) (Note 6) 4 2 2 2 1 mA min 3.5 1.8 1.8 1.8 1 mA min 3 2 1.6 2 1 mA min 3.5 1.8 1.3 1.8 1 mA min 400 450 400 450 A max 360 5.0V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 5.0V, V- = 0V, VCM = VO = V+/2 and RL > 1 M to V+/2. Boldface limits apply at the temperature extremes Symbol SR Parameter Conditions 4V @ VS = 6V Slew Rate Typ (Note 5) 14 RS < 1 k GBW Gain-Bandwidth Product f = 20 kHz 10 LM6134AI LM6134BI LM6132AI LM6132BI Limit Limit (Note 6) (Note 6) Units 8 8 V/s 7 7 min 7.4 7.4 MHz 7 7 min m Phase Margin RL = 10k 33 deg Gm Gain Margin RL = 10k 10 dB en Input Referred Voltage Noise f = 1 kHz 27 in Input Referred Current Noise f = 1 kHz 0.18 2.7V DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 2.7V, V- = 0V, VCM = VO = V+/2 and RL > 1 M to V+/2. Boldface limits apply at the temperature extreme Symbol Parameter VOS Input Offset Voltage IB Input Bias Current IOS Conditions Typ (Note 5) 0.12 0V VCM 2.7V LM6134AI LM6134BI LM6132AI LM6132BI Limit Limit (Note 6) (Note 6) 2 6 mV 8 12 max Units 90 nA Input Offset Current 2.8 nA RIN Input Resistance 134 M CMRR Common Mode 0V VCM 2.7V 82 dB 1.35V V+ 12V 80 dB Rejection Ratio PSRR Power Supply 3 www.national.com LM6132/LM6134 5.0V DC Electrical Characteristics LM6132/LM6134 2.7V DC Electrical Characteristics (Continued) Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 2.7V, V- = 0V, VCM = VO = V+/2 and RL > 1 M to V+/2. Boldface limits apply at the temperature extreme Symbol Parameter Conditions Typ (Note 5) LM6134AI LM6134BI LM6132AI LM6132BI Limit Limit (Note 6) (Note 6) 2.7 2.7 0 0 Units Rejection Ratio VCM Input Common-Mode Voltage Range AV Large Signal RL = 10k 100 RL = 100k 0.03 V V/mV Voltage Gain VO Output Swing 2.66 IS Supply Current Per Amplifier 0.08 0.08 V 0.112 0.112 max 2.65 2.65 V 2.25 2.25 min 330 A 2.7V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 2.7V, V- = 0V, VCM = VO = V+/2 and RL > 1 M to V+/2. Symbol Parameter Conditions Typ (Note 5) LM6134AI LM6134BI LM6132AI LM6132BI Limit Limit (Note 6) (Note 6) Units GBW Gain-Bandwidth Product RL = 10k, f = 20 kHz 7 MHz m Phase Margin RL = 10k 23 deg Gm Gain Margin 12 dB www.national.com 4 Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 24V, V- = 0V, VCM = VO = V+/2 and RL > 1 M to V+/2. Boldface limits apply at the temperature extreme Symbol VOS Parameter Conditions Input Offset Voltage IB Input Bias Current Typ (Note 5) 1.7 0V VCM 24V LM6134AI LM6134BI LM6132AI LM6132BI Limit Limit (Note 6) (Note 6) 3 7 mV 5 9 max 125 Units nA IOS Input Offset Current 4.8 nA RIN Input Resistance 210 M CMRR Common Mode 0V VCM 24V 80 dB 2.7V V+ 24V 82 dB Rejection Ratio PSRR Power Supply Rejection Ratio VCM Input Common-Mode Voltage Range AV Large Signal -0.25 0 0 V min 24.25 24 24 V max RL = 10k 102 V/mV RL = 10k 0.075 0.15 0.15 23.86 23.8 23.8 Voltage Gain VO Output Swing V max V min IS Supply Current Per Amplifier 390 450 450 A 490 490 max 24V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25C, V+ = 24V, V- = 0V, VCM = VO = V+/2 and RL > 1 M to V+/2. Symbol Parameter Conditions Typ (Note 5) LM6134AI LM6134BI LM6132AI LM6132BI Limit Limit (Note 6) (Note 6) Units GBW Gain-Bandwidth Product RL = 10k, f = 20 kHz 11 MHz m Phase Margin RL = 10k 23 deg 12 dB 0.0015 % Gm Gain Margin RL = 10k THD + N Total Harmonic AV = +1, VO = 20VP-P Distortion and Noise f = 10 kHz 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 k 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 150C. Note 4: The maximum power dissipation is a function of TJ(MAX), JA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/JA. 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 www.national.com LM6132/LM6134 24V DC Electrical Characteristics LM6132/LM6134 Typical Performance Characteristics TA = 25C, RL = 10 k unless otherwise specified Supply Current vs. Supply Voltage Offset Voltage vs. Supply Voltage 01234903 01234905 dVOS vs. VCM dVOS vs. VCM 01234906 01234907 dVOS vs. VCM IBIAS vs. VCM 01234908 www.national.com 01234909 6 IBIAS vs. VCM (Continued) IBIAS vs. VCM 01234910 01234911 Input Bias Current vs. Supply Voltage Negative PSRR vs. Frequency 01234912 01234913 Positive PSSR vs. Frequency dVOS vs. Output Voltage 01234915 01234914 7 www.national.com LM6132/LM6134 Typical Performance Characteristics TA = 25C, RL = 10 k unless otherwise specified LM6132/LM6134 Typical Performance Characteristics TA = 25C, RL = 10 k unless otherwise specified dVOS vs. Output Voltage dVOS vs. Output Voltage 01234916 01234917 CMRR vs. Frequency Output Voltage vs. Sinking Current 01234918 01234919 Output Voltage vs. Sinking Current Output Voltage vs. Sinking Current 01234920 www.national.com (Continued) 01234921 8 Output Voltage vs. Sourcing Current (Continued) Output Voltage vs. Sourcing Current 01234922 01234923 Output Voltage vs. Sourcing Current Noise Voltage vs. Frequency 01234925 01234924 Noise Current vs. Frequency NF vs. Source Resistance 01234938 01234939 9 www.national.com LM6132/LM6134 Typical Performance Characteristics TA = 25C, RL = 10 k unless otherwise specified LM6132/LM6134 Typical Performance Characteristics TA = 25C, RL = 10 k unless otherwise specified Gain and Phase vs. Frequency Gain and Phase vs. Frequency 01234928 01234929 Gain and Phase vs. Frequency GBW vs. Supply Voltage at 20 kHz 01234930 www.national.com (Continued) 01234931 10 Capacitive loads decrease the phase margin of all op amps. 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 op amps 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. The LM6132 brings a new level of ease of use to op amp 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. ENHANCED SLEW RATE Unlike most bipolar op amps, 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 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. 01234936 FIGURE 2. This rerouting of excess signal allows the slew-rate to increase by a factor of 10 to 1 or more. (See Figure 1.) As the overdrive increases, the op amp reacts better than a conventional op amp. Large fast pulses will raise the slewrate to around 25V to 30 V/s. 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 Figure 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 12V supplies with a 20 VPP pulse. Excellent response is obtained with a Cf of 39 pF. In Figure 4, the supplies have been reduced to 2.5V, the pulse is 4 VPP 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 op amps 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. Slew Rate vs. Differential VIN VS = 12V 01234940 FIGURE 1. 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. 11 www.national.com LM6132/LM6134 DRIVING CAPACITIVE LOADS LM6132/34 Application Information LM6132/LM6134 LM6132/34 Application Information the output and a feedback capacitor CFdirectly 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 ROis typically chosen to be between 100 to 1 k. (Continued) 01234937 FIGURE 6. 01234945 FIGURE 3. Typical Applications 3 OP AMP INSTRUMENTATION AMP WITH RAIL-TO-RAIL INPUT AND OUTPUT Using the LM6134, a 3 op amp 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 M 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. 01234942 FIGURE 4. 01234943 FIGURE 5. 01234944 Figure 6 shows a method for compensating for load capacitance (CO) effects by adding both an isolation resistor RO at www.national.com FIGURE 7. 12 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 s, 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. (Continued) 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 A 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. 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. 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 13 www.national.com LM6132/LM6134 Typical Applications LM6132/LM6134 Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC NS Package Number M08A 14-Lead (0.300" Wide) Molded Small Outline Package, JEDEC NS Package Number M14A www.national.com 14 LM6132/LM6134 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Lead (0.300" Wide) Molded Dual-In-Line Package NS Package Number N08E 14-Lead (0.300" Wide) Molded Dual-In-Line Package NS Package Number N14A 15 www.national.com LM6132 and LM6134 Dual and Quad, Low Power 10 MHz Rail-to-Rail I/O Operational Amplifiers Notes National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information visit us at www.national.com. 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