19-1192; Fev 2; 8/97 General Description The MAX4330-MAX4334 single/dual/quad op amps combine a wide 3MHz bandwidth, low-power operation, and excellent DC accuracy with Rail -to-Rail inputs and outputs. These devices require only 245uA per amplifier, and operate from either a single +2.3V to +6.5V supply or dual +1.15V to +3.25V supplies. The input common- mode voltage range extends 250mV beyond Vee and Vcc, and the outputs swing rail-to-rail. The MAX4331/ MAX4333 feature a shutdown mode in which the output goes high impedance and the supply current decreases to QUA per amplifier. Low-power operation combined with rail-to-rail input common-mode range and ouiput swing makes these amplifiers ideal for portable/battery-powered equipment and other low-voltage, single-supply applications. Although the minimum aperating voltage is specified at 2.3V, these devices typically operate down to 2.0V. Low offset voltage and high speed make these amplifiers excellent choices for signal-conditioning stages in pre- cision, low-voltage data-acquisition systems. The MAX4330 is available in the space-saving 5-pin SOT23 package, and the MAX4331/MAX4333 are offered in a uMAX package. Applications Portable/Battery-Powered Equipment Data-Acquisition Systems Signal Conditioning Low-Power, Low-Voltage Applications MA AXKXLRA Single/Dual/Quad, Low-Power, Single- Rail-to-Rail 1/O Op Amps with Shutdown 3MHz Gain-Bandwidth Product # 245A Quiescent Current per Amplifier 4 Available in Space-Saving SOT23-5 Package (MAX4330) e-Supply, Features @ +2.3V to +6.5V Single-Supply Operation Rail-to-Rail Input Common-Mode Voltage Range Rail-to-Rail Output Voltage Swing @ 250yV Offset Voltage @ Low-Power, SNA (per amp) Shutdown Mode (MAX4331/MAX4333) No Phase Reversal for Overdriven Inputs * Capable of Driving 2kQ Loads # Unity-Gain Stable Selector Guide PART pen Or once SHOoE PIN-PACKAGE MAX4330 1 _ 5 SOT23 MAX4331 1 Yes | 8 SO|WMAX MAX4a32 2 850 MAX4333 2 Yes | 10uMAX, 1450 MAX4334 4 = 140 Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. MAAXISIA Ordering Information PIN- SOT PART TEMP. RANGE PACKAGE TOP MARK MAX4330EUK -40C to +85C }= SOT23-5 ABAJ MAX4331ESA -40C to +85C | 8 SO _ MAX4331EUA -40C to +85C 8 UMAX _ MAX4332ESA -40C to +85C + 8SO _ MAX4333ESD -40C to +86C | 14 SO _ MAX4333EUB _-40C to +85C = 10 MAX _ MAX4334ESD = -40C to +85C 14 SO _ Pin Configurations TOP VIEW out [11] BK MAAXIAA Vee a MAX4330 ine [3 | ra] iN SOT23-5 Pin Configurations continued at end of data sheet. Maxim Integrated Products 3-101 For free samples & the latest literature: hitp:/www.maxim-ic.com, or phone 1-600-898-8800. For smail orders, phone 408-737-7600 ext. 3468. i PEEPXVIN-OCEPXUNMAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown ABSOLUTE MAXIMUM RATINGS Supply Voltage, Vt tO VEE oo. ccccceessescsssectsseseccenreeteeseere 7V IN_+, IN_-, SHON Voltage...... {VEE - 0.3V) to (Voc + 0.3V) Output Short-Circuit Duration... ccc eeecees Continuous (shart to either supply) Continuous Power Dissipation (Ta = +70C) -Pin SOT23 (derate 7. 1mW/C above +70C)}............. 8-Pin SO (derate 5.88mW/PC above +70C)....... we 8-Pin UMAX (derate 4. 10mW/C above +70C) ow... 10-Pin uMAX (derate 5.BOmWIPC above +70C)..........444mWw 14-Pin SO (derate 8.338mW/PC above +70C) Operating Temperature Ranges MAK433_C/D oes ce ces cereeeeeetatsaeeenneveans MAX433__ Maximum Junction Temperature .. Storage Temperature Range Lead Temperature (soldering, 10sec) setceseceeeees S67 mw OC to +70C . 40C to +85C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ara stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specitications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (Vcc = +2.3V to +6.5V, Vee = OV, Vom = OV, Vout = (Vcc / 2), Ri tied to (Vcc / 2), VSHDN 2 2V, Ta = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX | UNITS MAX433_EVA/EUB #0.65 #15 MAX4330EUK +0,65 #15 Input Offset Voltage Vos Von Vee MAX4331ESA +0.25 40.6 mv MAX4332ESA/MAX4333ESD +0.25 +0.9 MAX4334ESD +0.25 +10 Input Bias Current Ig 225 +65 nA Input Offset Current los 1 +12 nA ; ; . Ving - Vine b< 1.4V 2.3 MQ Differential input Resistance RIN(DIFF) Tine Vince b> BV 3 a Voltage Ronee. Input Vom 0.25 Veo +025} V MAX433_EUA/EUB} 68 88 MAX4330EUK 67 87 Voc = | MAX4a31ESA 74 (83 SV MAX4332ESA/ 8 71 93 MAX4333ESD Common-Mode cMAR Vane < MAX4334E5D 69 92 Rejection Ratio (Veo + 0.25) MAX433_EUA/EUB| 65 B4 MAX4330EUK 64 82 Voc = | MAX4331ESA 71 90 2.3V | MAX4332ESA/ oe 69 90 MAX4333ESD MAX4334ESD 66 8&9 MAX433_EUA/EUB] 76 88 MAX4330EUK 76 88 MAX4331ESA 79 92 Power-Supply Rejection Ratio PSSR Voc = 2.3V to 6.6V MAXASSDERAS 7 x0 dB MAX4333ESD MAX4334ESD 75 90 Output Resistance Rout | Av=1 0.1 Q in Shandon Current lOUTSRON) | VEHBN < 0.8V, Vout = OV to Voc 20.4 22 yA 3-102 MRAAXLARSingle/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail 1/0 Op Amps with Shutdown DC ELECTRICAL CHARACTERISTICS (continued) (Voc = +2.3V to +6.5V, Vee = OV, Vom = OV, VouT = (Vcc / 2), Ri tied to (Vcc / 2), VSHDN 2 2V. Ta = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Vout = 0.2V to 2.1V, RL = 100kQ 93 112 Veo = 2.3V Large-Signal Voltage Gain AVOL Vout = 0.35V to 1.95V, RL = 2ki 78 90 dB Veo = 5V Vout = 0.2V to 4.8V, AL = 100kQ| 93 120 Vout = 0.36 to 4.65V, RL = 2kQ 83 95 RL = 100Km2 | VCC YOH 830 Output Voltage Swing Vout Vou 8 30 WV AL = ko Vec - VOH 100 175 VoL 70 150 Output Short-Circuit Current isc 20 mA SHDN Logic Threshold Vit Low (shutdown mode} 0.8 Vv (Note 1) Vik High (normal mode) 2.0 SHDN input Current Ver < VSHON < Vcc +2 pA Ronee 9 Supply-Voltage Vec 23 65 Vv iescent Supply Current Voc = 5V 275 325 per amplifier eye lec | Vom= Vout = Voc /2 Weon2.aV 245 280 vA re Voc = V 7 25 ser arpltn current ICC(SHOR) | VSHON < 0.8V Wee = 2.aV 3 14 HA DC ELECTRICAL CHARACTERISTICS (Veco = +2.3V to +6.5V, Vee = OV, Vem = OV, VouT = (Vcc / 2), RL tied to (Vcc / 2). VSHDN 2 2V, Ta = -40C to +85C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX | UNITS MAX433_EUA 23.2 MAX433_EUK/EUB 43.8 input Offset Voltage Vos vee Voc MAX433 1ESA t07 | mv MAX4332ESA/MAX4333ESD +1 MAX4334ESD +1 Offset-Voltage Tempco AVos/AT +3 pVPC Input Bias Current \p +115 nA Input Offset Current los 215 nA MAX433_EUA 72 MAX433_EUK/EUB] 71 : . MAX433 1ESA 76 Power-Supply Rejection Ratio PSRR Voc = 2.3V to 6.5V MAX4332ESA) a dB MAX4333ESD MAX4334ESD 71 Votags Renee. Input Vom -0.15 Voc + 0.16 v MAAXIMA 3-103 i PECHXVIN-OCEPXUNMAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail /O Op Amps with Shutdown DC ELECTRICAL CHARACTERISTICS (continued) (Voce = +2.3V to +6.5V, Vee = OV, Vem = OV, Vour = (Voc / 2), Ri tied to (Voc / 2), VSADN 2 2V, Ta = -40C to +85C, uniess otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN =TYP MAX UNITS MAX433_EUA/EUB 63 MAX4330EUK 62 Veo = |MAX4331ESA 72 SV | MAX4332ESA/ 69 MAX4333ESD *0.25V < MAX4334ESD 67 Rejection Ratio CMRR | Vom < 3B j (Voc + 0.25) MAX433_EUA/EUB | 58 MAX4330EUK 57 Veo = |MAX4331ESA 68 23V | MAX4332ESA/ 66 MAX4333ESD MAX4334ESD 65 Off-Leakage Current oe in Shutdown louTSHBN) | VSHON < 0.8V, Vout = OV te Vec +5 pA VouT = 0.2V to 2.1V, Rie = 100kQ] 90 Veco = 2.3V > L Signal Volt Gai A Vout = 0.35V to 1.95V, Rp = 2k@| 70 4B arge-Signal Voltage Gain roesign g VoL v sy Vout = 0.2V to 4.8V, RE = 100kQ 90 e* Vout = 0.35V to 4.65V, R= 2k | 74 Voc - Vou 40 RL = 100kQ Vou 40 Output Voltage Swing Vour mv Voc - VoH 200 RL = 2kQ VoL 180 SHON Logic Threshold Vin Low (shutdown mode) 0.8 y (Note 1) ViH High (normal mode) 2.0 SHON Input Current Ver < VSHBN < Voc +2 yA Operating Supply-Voltage Veco | TA =-40C to +85C 23 65 V Range Quiescent Supply Current . _ 10 Vcc = SV 350 A per Amplifier Ico | Vom = Vout = Voc /2 Voc = 2.3V 330 is Shutdown Supply Current Vy Voc = 5Vv 30 A per Amplifier ICC(SHON) | VSHON < 0.8 Vcc = 2.3V 7 u Note 1: SHDN logic thresholds are referenced to Vee. Note 2: The MAX4330EUK is 100% tested at Ta = +25C. All temperature limits are guaranteed by design. 3-104 MRAAXISASingle/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown AC ELECTRICAL CHARACTERISTICS = (Voc = +5V, Vee = OV, Vom = OV, Vout = (Voc / 2), RL = 10kQ to (Vec / 2), VSRDN 2 2V, CL = 15pF, Ta = +25C, unless otherwise noted.) > PARAMETER SYMBOL CONDITIONS MIN TYP MAX | UNITS > Gain-Bandwidth Product GBWwP 3 MHz a Full-Power Bandwidth FPBW Vout = 4Vp-p 190, kHz Slew Rate SR 15 Vius bn Phase Margin PM 55 degrees Gain Margin GM 10 dB Total Harmonic Distortion THD f = 10kHz, VouT = 2Vp-p, Avet = +1VV 0.012 % = Settling Tirne to 0.01% ts Av = +1V/V, 2V step 4 us Input Capacitance Cin 3 pF Input Noise Voltage Density Vnoise | f= 10kHz 28 nvNHz | oy input Current Noise Density noise | f= 10kHz 0.26 pANHz | @) Crosstalk f = 10kHz, MAX4332/MAX4333/MAX4334 -124 dB | Capacitive Load Stability Ay = 1, nO sustained oscillations 150 pF & Shutdown Time tSHBN 0.8 us Enable Time from Shutdown tENABLE 1 Us Power-Up Time tON 5 us Typical Operating Characteristics (Voc = +5V, Veg = OV, Vom = Voc / 2, VSHON > 2V, Ta = +25C, unless otherwise noted.) GAIN AND PHASE POWER-SUPPLY REJECTION RATIO VS. FREQUENCY (Ci = 150pF) vs. FREQUENCY CTL Ue m0 444 a Ht HH Le Un CIN T ll ME ai Tn a o CMTC COCTMCTINGT soe TT CUM ta Bu LY SL B TIMPs TE Ug ET Tae Nt A RST NS n HS CECT TEC TN vm 100k 10k 100k 61M. (10M (100M 100 1k 10k 100k = 1M 10M < 10-100) tk 19K 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz} FREQUENCY (Hz} MAAXLAA 3-105MAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail i/O Op Amps with Shutdown (Vcc = +5V, Veg = OV, Vom = Voc / 2, VSHDN > 2V, Ta = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) OUTPUT IMPEDANCE SUPPLY CURRENT SHUTDOWN SUPPLY CURRENT vs. FREQUENCY vs. TEMPERATURE vs, TEMPERATURE Ik 350 5 TT I i 330 SHDN = ov eden i a 100 310 0 7 Voge 65V 4 230 | Zz 10 - m7 a | = 3 x S45 = 1 ~ 230 ~ : of 190 pe Sat aii aa) manta 170 oo, CLEC 150 5 100 1k = 10k 100k. 1M 10M 100M 0 -40 -2 0 20 40 60 80 100 0 -40 -20 0 2% 40 60 80 100 FREQUENCY (Hz) TEMPERATURE (C) TEMPERATURE (C) OUTPUT LEAKAGE CURRENT INPUT OFFSET VOLTAGE WPUT BIAS CURRENT vs. TEMPERATURE vs, TEMPERATURE vs. COMMON-MODE VOLTAGE 1500 Ay= OPEN HON = OV Ss our sHoRT| Vec = 654 = (000 _ = TO Vee { Veo = a & g B00 z 3 3 = Qo > 3 - (OO GS g 5 2 3 QUT SHORT 8 = a a = = i plseear : 500 2 = S -4000 -1500 60 40 -20 0 2 40 6 80 100 -60 -40 -26 0 20 40 60 80 10 0 1 2 3 4 5 7 TEMPERATURE (C} TEMPERATURE (C) COMMON-MODE VOLTAGE {V} THPUT BIAS CURRENT OUTPUT SWING HIGH OUTPUT SWING LOW vs. TEMPERATURE vs. TEMPERATURE vs. TEMPERATURE -16 250 tT T T g 120 Vem = OV Ry 10 Vee 3 Voc 1a Vee = 6.5V Ry = GA 3 100 = a0 | eet 2 2 Veo = 23V - oc = 2. = a = 80 R= =e 2 = Vec=23 3 2 = 8 Ri, = 2k Zu 7 +00 Yor = 2 3V, Ry = 2kot : S a6 Vec = 6.5 > ; = 49 aS - one = & - [__Wor=23V. Ri = 100k Yec= -28 Veo = 65 as 20 Rye 30 0 0 60-40 -20 0 2 40 60 80 100 60 -40 -20 9 20 4 60 80 100 60 -40 -20 9 20 40 60 380 100 TEMPERATURE (C) TEMPERATURE (C) TEMPERATURE (203 3-106 MA AXILAASingle/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown Typical Operating Characteristics (continued) (Vcc = +5V, Vee = OV, Vom = Voc / 2, VSABN > 2V, Ta = +25C, unless otherwise noted.) LARGE-SIGNAL GAIN LARGE-SIGNAL GAIN COMMON-MODE RESECTION vs. OUTPUT VOLTAGE vs. QUTPUT VOLTAGE vs. TEMPERATURE 18 (Vee = 2.3V, i TO Vcc) ina (Vee = 2.39, Rt TO Vex) _ 113 Re i 114 A= : gs z 5 108 410 3B : _, 183 a w Ss ze = = 8 - Zz = 102 - 98 3 93 88 4 3 - 83 x 78 86 60 -40 -20 0 20 4 60 80 100 0 Of 02 03 04 O85 06 Oo Of O62 O38 04 O58 06 TEMPERATURE (C) OUTPUT VOLTAGE: EITHER SUPPLY (V) OUTPUT VOLTAGE: EITHER SUPPLY (V) UARGE-SIGNAL GAIN LARGE-SIGNAL GAIN vs. OUTPUT VOLTAGE vs. OUTPUT VOLTAGE LARGE-SIQNAL GAIN {Vee = 6.5, Fy TO Vee) (Vcc = 6.5, Ry TO Vex) vs. TEMPERATURE (Ry = 2k} 140 130 415 135 130 Ri = 100k 110 120 Ry, T0 Ver _ _ 5 Ry = 10k) _ 8 g g = 110 = 10 = 100 R10 Voc & 3 - 3 400 ' % 100 90 9% R10 Ve 80 % 85 Oo Of O2 O03 O04 O05 08 0 OF O02 O38 O04 O05 06 60 ~40 -20 0 20 40 60 80 100 OUTPUT VOLTAGE: EITHER SUPPLY (V) QUTPUT VOLTAGE: EITHER SUPPLY (V) TEMPERATURE (C} LARGE-SIGHAL GAIN MINIMUM OPERATING VOLTAGE vs. TEMPERATURE (fi, 2 100k2) vs. TEMPERATURE 130 1 200 Voc = 6.5V Yourtp-P} = E a Fe 10 Vee Yoo -1V i 195 428 hey 4.90 Cc = 8. => Ry TO Vec PS 1.85 z& g | Si] se g z 120 + in 2 1.80 = 3 ! > a 175 = PAK 15 P+ Veg =2.3 1.70 A 10 Voc OR Vee >< | i 1.65 110 1.60 60 -40 -20 6 2 40 60 8) 100 60 -40 -20 0 2 40 60 80 100 1 10 100 tk 10k 100k TEMPERATURE (C) TEMPERATURE (C) FREQUENCY (Hz} MAXIMA 3-107 i PECPXVIN-OCEPXUWingle/Dual/Quad, Low-Power, Single-Supply, Rathte tal V/O Op Amps with Shutdown Typical Operating Characteristics (continued) (Voc = +5V, VEE = OV, Vom = Voc / 2, VSHBN > 2V, Ta = +25C, unless otherwise noted.) wy TOTAL HARMONIC DISTORTION AND NOISE vs. PEAK-TO-PEAK 5 SIGHAL AMPLITUDE CROSSTALK vs. FREQUENCY CAPACITIVE LOAD STABILITY 1 140 10 Pye = SINE WAVE 130 500kHZ _ 4 = 01 RTD Veet? 3 g z g ws 3 2 g = 0 & 3 & 4 WF on > 400 a 90 2 P veut =Vec/ 2" 7 = 0.001 a 4 40 42 44 48 4850 1 70 too 1000 10008 0 206. asiwswNSt000 PEAK-T0-PEAK SIGNAL AMPLITUDE (V) FREQUENCY (iti) LOAD CAPACITANCE (p*} SMALL-SIGHAL TRANSIENT RESPONSE SMALL-SIGHAL TRANSIENT RESPONSE (HONENVERTING) (INVERTING) ; i Vi ot . IN = = J. Le 3 BL jeccrisrcejsursinseeboeanivevebannd g ge [oe ienepeton = ay : a s S$ fo \ fo TIME (200ns/div) TIME (200ns/aiv) LARGE-SIGNAL TRANSIENT RESPONSE LARGE-SIGNAL TRANSIENT RESPONSE (ROMMIVERTING) {RIVERTENG) REA TID . Send . | a iN oe . = 2 g s g TIME (5y:3/div) TIME (Susidiv} 3-108 MAXLMASingle/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail /O Op Amps with Shutdown Pin Description PIN MAX4333 . NAME FUNCTION MAX4330 | MAX4331 | MAX4332 10-Pin MAX4334 14-Pin SO pMAX 41 6 _ _ _ _ OUT Output Negative Supply. Ground for single- 2 4 4 4 4 VEE supply operation. _ _ _ IN+ Noninverting Input _ _ ~ _ IN- inverting Input 8 10 14 4 Vee Positive Supply No Connection. Not internally - 15 ~ 5.7.8, 10 ~ N.C. connected. OUT1, . _ _ 4,7 1,9 1.43 1,7 OUT? Outputs for Amplifiers 1 and 2 INt+, Noninverting Inputs to Amplifiers _ 3 3,5 3.7 311 3.8 IN2+ | tand2 IN1-, Inverting inputs to Amplifiers _ _ 2,6 2,8 2,12 2,6 IN2- 1and2 Shutdown Input for Amplifier. Drive sont low for shutdown mode. Drive _~ 8 ~ ~ ~ ~ SHDN high or connect to Vcc for normal operation. Shutdown for Amplifiers 1 and 2. 56 6.9 _ SHON, | Drive low for shutdown mode. a ~ ' ' HDN2 | Drive high or connect to Vcc fer normal operation. OUT3, op ~ _ 8, 14 OuT4 Outputs for Amplifiers 3 and 4 9.13 IN3-, Inverting Inputs for Ampiifiers ~ ~ ~ ~ ~ IN4- 3 and 4 40, 12 IN3+, Noninverting Inputs for Amplifiers _ _ ~ ~ ~ . IN4+ 3 and 4 MAAXIAA 3-108 i PEEPXVW-OSEPXVNMAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown Detailed Description Rail-to-Rail input Stage The MAX4330-MAX4334 have rail-to-rail input and out- put stages that are specifically designed for tow- voltage, single-supply operation. The input stage con- sists of separate NPN and PNP differential stages, which operate together to provide a common-mode range extending to 0.25V beyond both supply rails. The crossover region, which occurs halfway between Vcc and VEE, is extended to minimize degradation in CMRR caused by mismatched input pairs. The input offset volt- age is typically 250uV. Low offset voltage, high band- width, rail-to-rail common-mode input range, and rail-to-rail outputs make this family of op amps an excel- lent choice for precision, low-voltage data-acquisition systems. Since the input stage consists of NPN and PNP pairs, the input bias current changes polarity as the input volt- age passes through the crossover region. Match the effective impedance seen by each input to reduce the offset error due to input bias currents flowing through external source impedances (Figures 1a and 1b). The combination of high source impedance with input capacitance (amplifier input capacitance plus stray capacitance) creates a parasitic pole that produces an underdamped signal response. Reducing input capaci- tance or placing a small capacitor across the feedback resistor improves response. Tne MAX4330-MAX4334s inputs are protected from large differential input voltages by internal 1kQ series resistors and back-to-back triple diode stacks across the inputs (Figure 2). For differential input voltages (much jess than 1.8V), input resistance is typically 2.3MQ. For differential input voltages greater than 1.8V, input resistance is around 2kQ, and the input bias cur- rent can be approximated by the following equation: IBIAS = (VDIFF - 1.8V) / 2kQ In the region where the differential input voltage approaches 1.8V, input resistance decreases exponen- tially from 2.3MQ to 2kQ as the diode block begins con- ducting. Inversely, the bias current increases with the same curve. 3-110 MAAXIAA MAX4330 MAX4331 MAX4332 MAX4333 MAX4334 R3=Ri| [RZ tL W* Figure 1a. Reducing Offset Error Due to Bias Current (Noninverting) AAAXLAA MAX4330 MAX4331 MAX4332 MAX4333 MAX4334 R3=R1 || RZ L>_wWw-* Rt Figure 1b. Reducing Offset Error Due to Bias Current (inverting) PAAXILAASingle/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown L> WW + 4 [> W\* Figure 2. input Protection Circuit Widiv f . aur |; \ / \ | 1Wdiv 20ys/div Voc = 3V, Ry = 2k TO Veg /2 Riso = 022, Ay = +1 C= 510pF tn IN | | | soravaiv | | oot fi our somVidiv Artneeand iannnenannd 2us/div Voc = 3V, Ry = 100ke2 Figure 3. Rail-to-Rail Input/Output Vollage Range Rail-to-Rail Output Stage The MAX4330~-MAX4334 output stage can drive up to a 2kQ load and still typically swing within 125mV of the rails. Figure 3 shows the output voltage swing of a MAX4331 configured as a unity-gain buffer. The operat- ing voltage is a single +3V supply, and the input volt- age is 3Vp-p. The output swings to within 70mV of VEE and 100mV of Vcc, even with the maximum load applied (2kQ to mid-supply). Figure 4. Smatl-Signal Transient Response with Excessive Capacitive Load Driving a capacitive load can cause instability in many op amps, especially those with low quiescent current. The MAX4330-MAX4334 are stable for capacitive loads up to 150pF. The Capacitive Load Stability graph in the Typical Operating Characteristics gives the stable operating region for capacitive vs. resistive loads. Figures 4 and 5 show the response of the MAX4331 with an excessive capacitive load, compared with the response when a series resistor is added between the output and the capacitive load. The resistor improves the circuit's response by isolating the joad capacitance from the op amp's output (Figure 6). 3-111 FMAAXIAA i vECPXVIN-OLEPXUNMAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-S upply, Rail-to-Rail 1/O Op Amps with Shutdown Ay= +1, C, =510pF Riso = 39Q SomV/div our 1 | SOmv/div 2usidlv MAAXIAN MAX4330 MAX4331 MAX4332 MAX4333 MAX4334 Riso | 7 Figure 5, Smail-Signal Transient Response with Excessive Capacitive Load and Isolation Resistor Figure 6. Capacitive-Load-Driving Circuit MAAXIMA MAX4330 Ce MAX4331 MAX4332 OV 10 +2.7V STEP FOR POWER-UP MAX4333 TEST, +2.7V STEP MAX4334 FOR SHUTDOWN- 2x S ENABLE TEST Vour OV 10 +2.7V STEP FOR SHUTDOWN TEST Lo SUPPLY-CURRENT = MONITORING POINT = = , cone Jf \ Voe i 1Widiw Fa | foo\ Vv 5, { \ OUT \ 4 S50GmV/div nee Nee Spusidiv Figure 7. Power-Up/Shutdown Test Circuit Applications information Power-Up The MAX4330-MAX4334 outputs typically settle within 5us after power-up. Using the test circuit of Figure 7, Figures 8 and 9 show the output voltage and supply current on power-up and power-down. 3-112 Figure 8. Power-Up/Down Ouiput Voltage Shutdown Mode The MAX4331/MAX4333 feature a low-power shutdown mode. When the shutdown pin (SHDN) is pulled tow, the supply current drops to 92A per amplifier (typical), the amplifier is disabled, and the outputs enter a high- impedance state. Pulling SHDN high or leaving it float- ing enables the amplifier. Figures 10 and 11 show the MAX4331/MAX4333's output voltage and supply-current responses to a shutdown pulse. MAAXISASingle/Dual/Quad, Low-Power, Si pply, Rail-to-Rail I/O Op Amps with Shutdown f \ Vee / \ Widiv Ld \ eae ga i ~ lee | \ 100yArCiv es) a Susidiv Sus/div iVidiv S00mV/div Figure 9. Power-Up/Down Supply Current Do not three-state SHDN. Due to the output leakage currents of three-state devices and the small internal pull-up current for SHDN, three-stating this pin could result in indeterminate logic levels, and could adversely affect op-amp operation. The logic threshold for SHDN is always referred to VEE, not GND. When using dual supplies, pull SHDN to Vee to place the op amp in shutdown mode. Power Supplies and Layout The MAX4330-MAX4334 operate from a single +2.3V to +6.5V power supply, or from dual +1.15V to 23.25V supplies. For single-supply operation, bypass the power supply with a 0.1uF capacitor to ground (VEE). For dual supplies, bypass both Vcc and Vee with their own set of capacitors to ground. Gocd layout technique helps optimize performance by decreasing the amount of stray capacitance at the op amps inputs and outputs. To decrease stray capaci- tance, minimize trace lengths by placing external com- ponents close to the op amp's pins. MAAXISAA Figure 10. Shutdown Output Voltage Enable/Disable SHON Icc Sus/div iV/div 100,A/div Figure 11. Shutdown Enable/Disable Supply Current 3-113 i PECPXVIN-OCEPXUNNMAX4330-MAX4334 Single/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail 1/O Op Amps with Shutdown Pin Configurations (continued) TOP VIEW ne. [1] 8 | SHDN oun (4 8] Vcc y. [7] AAAXLAA nie [3] AAAXIAA TH Lal ease pe m- areas Flo in [3] re] our inte [3 6 | we- Ver (4 [5 | NC. Veg 44 [5 | INZ+ SO/uMAX so out Gy " 0] Voc ni- [2] AAAXIAA [9] our nts [3] MAXAS33 8] IN2- Vee [4] 7] IN2+ SHONT [5 [| SHON piMAX oun [a 4) Vee oun [7] * ri) outa nt- [2] 13] oute nt- F2] 3] iNd- nts (31 parce an [12] 1N2- w+) Anaxan [2] 4 vee (4) Maxas33 [ii] ina vec [4] maxas34 Tt} vec nc. [5] 19} ne. Nae [5 rsa} Inge sHom [6 [9] SHOWS inz- [6 9] N3- ne. [7 Pa] NC. oure [7 rs | ours so so 3-114 MA AXIMASingie/Dual/Quad, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown Chip information MAX4330/MAX4331 TRANSISTOR COUNT: 199 SUBSTRATE CONNECTED TO Vee MAX4332/MAX4333 TRANSISTOR COUNT: 398 SUBSTRATE CONNECTED TO Vee MAX4334 TRANSISTOR COUNT: SUBSTRATE CONNECTED TO Vee Tape-and-Reel information fs _" i PECPXVW-OfEPXUW Fo Lg NOTE: DIMENSIONS ARE IN MM. AND FOLLOW EIA481-1 STANDARD. Aa 3.200 0.102 E 4.753 0.102 Po 3.988 +0.102 Bo 3.099 0.102 F 3.505 +0.051 Pg td 40.005 20.203 +0.102 1.397 +0.102 P. 2.007 +0.051 D 1499 *0.005 Ko 2 ~ a Pp 3.988 +0.102 t 0. 40.127 D, 0.991 10.256 a re I Ww 8.001 +0.305 g " 0.102 & MAAXILAA 3-115