~ 6367253. MOTOROLA 8e TELECOM ay - - ORDERING INFORMATION ~O1E 80645 Dp T-79 -07-/0 MC1741S Device Temperature Range Package MC17418G -65C to +126C = Metal Can MC1 741SC MC1741SCD OC to +70C So0-8 MC1741SCG OC to +70C Matal Can MC1741SCP1 OC to +70C Plastic DIP ~~ HIGH SLEW RATE, INTERNALLY COMPENSATED OPERATIONAL AMPLIFIER OPERATIONAL AMPLIFIER . SILICON MONOLITHIC The MC1741S/MC1741SC is functionally equivalent, pin com- INTEGRATED CIRCUIT patible, and possesses the same ease of use as the popular MC1741 circuit, yet offers 20 times higher slew rate and power bandwidth. This device is ideally suited for D-to-A converters due to its fast settling time and high slew rate. . G SUFFIX . . _ METAL PACKAGE @ High Slew Rate 10 V/us Guaranteed Minimum (for unity gain only) i . fl CASE 601-04 @ No Frequency Compensation Required @ Short-Circuit Protection @ Offset Voltage Null Capability g 1 @ Wide Common-Mode and Differential Voltage Ranges @ Low Power Consumption @ No Latch-Up ao, TYPICAL APPLICATION OF OUTPUT CURRENT TO 8 ae VOLTAGE TRANSFORMATION FOR A D-TO-A CONVERTER 1 Vee =5.0V Veet = 2.0 Vdc D SUFFIX fis 2 & 1ORS P1 SUFFIX PLASTIC PACKAGE ou PLASTIC PACKAGE CASE 751-02 13 CASE 626-05 S0-8 MsB aroe oA 0 Vt A20 OFFSET NULLGJ Dac a30 cisoat-e P20 $v INVT INPUT E A vce asoe MC1408L R2 =e NONINVT INPUT Ef OUTPUT asow-| Series VeeG [} OFFSET NULL aso. (Top View) avo tse asolZf 16h 18 @Vee=-15v Ao Pins not shown are not connected. Settling time to within 1/2 LSB (+19.5 mV) is approxi- mately 4.0 ys from the time that all bits are switched. *The value of C may be selected to minimize overshoot and ringing (C = 150 pF). Theoretical Vg Vo= otha ) AL A2 AR. A4 4 AS 7 AS, Al 4A8 4 8 16 "33 ea 28 "56 Adjust Vref, R11 or RQ so that Vg with all digital i inputs at high level is equal to 9.961 volts. tay 255 Vo =(5k) |o+ ++ + + 4+ = a i Fy W's" 16 32 a r gfe rev wz $861 MC17415 LARGE-SIGNAL TRANSIENT RESPONSE 5.0 V/DIV 1.0 us/DIV STANDARD MC1741 versus MC1741S RESPONSE COMPARISON 5.0 V/DIV 10 us/DIV MOTOROLA LINEAR/INTERFACE DEVICES 2-166MOTOROLA SC {TELECOM} OLE >i 6367253 OO80644b 1 i MC1741S, MC1741SC 6367253 MOTOROLA SC _CTELECOM) O1E 80646 p T=19-07-10 CIRCUIT SCHEMATIC i" i INVERTING INPUT 5k 5k TINS wwPUT: T OFFSET gf MULL 360 er a Ak yee OUTEUT OFFSET RULE I VEE MAXIMUM RATINGS (Ta = +25C unless otherwise noted.) Value Rating Symbol MC1741SC MC1741S Unit Power Supply Voltage Veco +18 +22 Vde VEE -18 -22 Differential Input Signat Voltage Vip +30 Volts Common-Mode Input Voltage Swing (See Note 1} VicR 15 Volts Output Short-Circuit Duration (See Note 2) ts Continuous Power Dissipation {Package Limitation} Pp Metal Package 680 mW Derate above Ta = #25C 46 mw/ec Plastic Dual In-Line Package 625 mw Derate above Tp = +25C 5.0 mwiec Operating Ambient Temperature Range Ta Oto +75 | -55 to +125 % Storage Temperature Range Tstg [% Metal Package -65 to +150 Plastic Package -65 to +125 Note 1. For supply voltages less than +15 Vde, the absolute maximum input voltage is equa! to the supply voltage. =. Note 2. Supply voltage equal to or less than 15 Vdc. FIGURE 1 OFFSET ADJUST CIRCUIT vec INPUTS OFFSET NULL TERMINALS VEE OUTPUT FIGURE 2 INPUT BIAS CURRENT versus TEMPERATURE lip, AVERAGE [INPUT BIAS CURRENT (nA) 475 T, TEMPERATURE (C) MOTOROLA LINEAR/INTERFACE DEVICES 2-167MOTOROLA SC {TELECOM} QUE D B nanzess OO48064? 3 i oO 1E 80647 Db T-79-07- lO ELECTRICAL CHARACTERISTICS (Vcc = +15 Vac, Veg = -15 Vdc, Ta = +25C unless otherwise noted.) "6367253 MOTOROLA SC (TELECOM) MC1741S, MC1741SC MC17418 Mic 1741SC Characteristic Symbol Min Typ Max Min Typ Max Unit Power Bandwidth (See Figure 3) BWp kHz Ay = 1, RL = 2.0k2, THD = 5%, Vg = 20 Vip-p) 160 200 - 150 200 - Large-Signal Transient Response Stew Rate (Figures 10 and 11) SR Vi-} to V+) 10 20 - 10 20 - Vins Vit} to Vi-} 10 12 = 10 12 ~ Settling Time (Figures 10 and 11) . teettg = 3.0 - - 3.0 - BS (to within 0.1%) Lo Smatt-Signal Transient Response {Gain = 1, Ej, = 20 mV, see Figures 7 and 8) Rise Time 'TLH - 0.25 ~ - 0.25 = MS Fall Time tTHL - 0.25 - _ 0.25 - BS Propagation Delay Time : t(PLH-tPHL - 0.25 - - 0.25 - BS Overshoot os - 20 - - 20 ~- % Short-Circuit Output Currents los +10 _ 435 210 - #35 mA Open-Loop Voltage Gain (R__ = 2.0 kQ) (See Figure 4) Ayol - Vo = 410 V, Ta = +25C 50,000 | 200,000 - 20,000 | 100,000 - Vo = 10 V, Ta = Tow to Thigh 25,000 - - 15,000 - - Output Impedance {f = 20 Hz) Zo = 75 = = 75 - 2 tnput Impedance (f = 20 Hz) zi 0.3 1.0 - 0.3 1.0 - MQ Output Voltage Swing Vo Vpk Ri = 10k, Ta = Tow to Thigh (MC17415 only) +12 414 - +12 +14 - Ri = 2.0k2, Ta = +25C +10 413 - +10 413 = Ri. =2.0k2, Ta = Tig to Thigh 410. - - +10 - - Input Common-Mode Voltage Range ViICcR +12 413 - 12 413 - Vpk Ta = Tiow te Thigh (MC17415) Common-Mode Rejection Ratio (f = 20 Hz) CMRR 70 90 - 70 90 - dB Ta = Tlow to Thigh (1C17418) Input Bias Current (See Figure 2} hig nA Ta = +25C and Thigh - 200 500 - 200 500 Ta = Tow - 500 1500 - _ _800 Input Offset Current {hol . nA Tp = +25C and Thigh - 30 200 - 30 200 Ta = Tiow - - 500 - - 300 Input Offset Voltage (Rg = <10 kQ) Mol mV Tp = +25C - 1.0 5.0 - 2.0 6.0 Ta = Tiow to Thigh - ~ 6.0 - - 75 DC Power Consumption (See Figure 9} Pe . mw (Power Supply = +15 V, Vo = 0) - 50 85 - 50 85 TA = Tlow to Thigh Positive Voltage Supply Sensitivity Psst RVIV (VEE constant} - 2.0 100 - 2.0 150 Ta = Tiow to Thigh on MC1741S Negative Voltage Supply Sensitivity Pss- uvVIV (Vcc constant) - 10 150 - 10 150 *Tlow = 0 for MC1741SC Thigh = +70C for MC1741SC = -55C for MC1741S ~ = +125 C for MC1741S MOTOROLA LINEAR/INTERFACE DEVICES 2-168MOTOROLA SC {TELECOM} OLE D y Weseress O080b4ea 5 i ~E367253. MOTOROLA oc . CTELECOM) MC1741S, MC1741SC O1E 80648 D TT -19-07-10 at : TYPICAL CHARACTERISTICS (Vee = +15 Vde, Veg = -15 Vde, Ta = 25C unless otherwise noted.) FIGURE 3 POWER BANDWIOTH NONDISTORTED OUTPUT VOLTAGE versus FREQUENCY FIGURE 4 OPEN-LOOP FREQUENCY RESPONSE +120 + Avo. VOLTAGE GAIN (dB} PEAK OUTPUT VOLTAGE FOR < 5% THD (VOLTS) 10 10k 1.0 10 100 1.0k 10k 100k 10M 10M 1, FREQUENCY (Hz} : f, FREQUENCY {Hz} 1 FIGURE 6 OUTPUT NOISE versus FIGURE 5 NOISE versus FREQUENCY / SOURCE RESISTANCE = 100 en, INPUT NOISE VOLTAGE (nV/{H2) eon, GUTPUT NOISE VOLTAGE (mV[RMS]} Ay=10} Ay=i . 10k 10k f, FREQUENCY (Hz) - Rg, SOURCE RESISTANCE (OHMS} FIGURE 7 SMALL-SIGNAL TRANSIENT FIGURE 8 SMALL-SIGNAL TRANSIENT RESPONSE DEFINITIONS RESPONSE TEST CIRCUIT Ping not shown are nat connected. OVERSHOOT Yas Yo * FALL TIME TRL OVERSHOOT Vos RISE TIME. MOTOROLA LINEAR/INTERFACE DEVICES 2-169MOTOROLA SC {TELECOM} OLE >a 6367253 0080644 ? vf 1 6367253 MOTOROLA sc CTELECOM) me OTE 80649 ~ D 'Mc1741S, MC1741SC | T -19-01-10 TYPICAL CHARACTERISTICS (Voc = +15 Vde, Veg = -15 Vde, Ta = +25C unless otherwise noted.) FIGURE 9 POWER CONSUMPTION versus POWER SUPPLY VOLTAGES SETTLING TIME in order to properly utilize the high slew rate and fast settling time of an operational amplifier, a number of system considerations must be observed. Capacitance at the summing node and at the amplifier output must be minima! and circuit board layout should be consistent with common high-frequency considerations. Both power supply connections should be adequately bypassed as close as possible to the device pins. In bypassing, both low and high-frequency components should be con- sidered to avoid the possibility of excessive ringing. In order to achieve optimum damping, the selection of a capacitor in parallel with the feedback resistor may be necessary. A value too small could result in excessive ringing while a value too large will degrade stew rate and Voc and VEE), SUPPLY VOLTAGE (VOLTS) settling time, SETTLING TIME MEASUREMENT in order to accurately measure the settling time of an FIGURE 10 LARGE-SIGNAL TRANSIENT WAVEFORMS operational amplifier, it is suggested that the false summing junction approach be taken as shown in Figure 11. This is necessary since it is difficult to de- INPUT gp, termine when the waveform at the output of the op- erational amplifier settles to within 0.1% of it's final RATE value. Because the output and input voltages are ef- meee stew fectively subtracted from each other at the amplifier PERIOD) V(-) to VO inverting input, this seems like an ideal node for the abet measurement. However, the probe capacitance at this critical node can greatly affect the accuracy of the actual measurement. The solution to these problems is the creation of a second or false summing node. The addition of two diodes at this node clamps the error voltage to limit the _ voltage excursion to the oscilloscope. Because of the voitage divider effect, only one-half of the actual! error appears at this node. For extremely critical measure- ments, the capacitance of the diodes and the oscilloscope, FIGURE 11 SETTLING TIME AND SLEW RATE TEST CIRCUIT and the settling time of the oscilloscope must be con- sidered, The expression ak tsetlg=V x2 + y2 + 22 Pc, POWER CONSUMPTION (mW) ALLOWABLE ERROR OUTPUT BAND Vee HV can be used to determine the actual amplifier settling time, where ov tsetlg = observed settling time FL x = amplifier settling time (to be determined) outrot y = false summing junction settling time 9 z= oscilloscope settling time - It should be remembered that to settle within 0.1% me requires 7RC time constants. The +0.1% factor was chosen for the MC1741S * ee settling time as it is compatible with the +1/2 LSB raise accuracy of the MC1508L8 digital-to-analog converter, suman antauv Fortatiy taueisernemt one, This D-to-A converter features 0.19% maximum error. MOTOROLA LINEAR/INTERFACE DEVICES 2-170MOTOROLA SC {TELECOM} OLE >t b36b7253 OO80bS0 3 i 6367253 MOTOROLA SC CTELECOM) | Ot 80650 ~o MC17418, MC1741SC.- T- 19-07-40 FIGURE 12 WAVEFORM AT FALSE SUMMING NODE TYPICAL APPLICATION FIGURE 14 12.5-WATT WIDEBAND POWER AMPLIFIER *15V 2 2 z FB a . ) WeT100 mk MPsAIz OR EQUIV 033 1.0 us/DlV 10k* FIGURE 13 EXPANDED WAVEFORM AT Cy pas FALSE SUMMING NODE INPUT 18k -_o-} MCI74IS .) mueroan\ Luk - feceatnth oR Equiv { (CURRENT : LIMITING = 0.196 = al008 = ERROR E BAND 10k 2 Detivers 12.5 Wattsinto 4.0 ohms with fess than 1% THO to 1O0kHz, Fins not shoe are nol connected. Bias cuter adjustment ta efimmate Crossover Distortion, Epoxy lo power anusice heat sink or case for maxtcm Thermal Feedback. 1.0 ps/DIV MOTOROLA LINEAR/INTERFACE DEVICES 2-171