Ultra-Small, Low-Cost, 210MHz, Dual-Supply Op Amps with Rail-to-Rail Outputs

Transcription

1 9-989; Rev ; /5 Ultra-Small, ow-ost, MHz, Dual-Supply General Description The MAX435 single and MAX435 dual op amps are unity-gain-stable devices that combine high-speed performance with rail-to-rail outputs. Both devices operate from dual ±5V supplies. The common-mode input voltage range extends to the negative power-supply rail. The MAX435/MAX435 require only 6.9mA of quiescent supply current per op amp while achieving a MHz -3dB bandwidth and a 485V/µs slew rate. Both devices are excellent solutions in low-power systems that require wide bandwidth, such as video, communications, and instrumentation. The MAX435 is available in an ultra-small 5-pin S7 package and the MAX435 is available in a spacesaving 8-pin SOT3 package. Set-Top Boxes Surveillance Video Systems Video ine Drivers Analog-to-Digital onverter Interface D Imaging Systems Video Routing and Switching Systems Digital ameras Applications Features Ultra-Small 5-Pin S7, 5-Pin SOT3, and 8-Pin SOT3 Packages ow ost High Speed MHz -3dB Bandwidth 55MHz.dB Gain Flatness 485V/µs Slew Rate Rail-to-Rail Outputs Input ommon-mode Range Extends to VEE ow Differential Gain/Phase:.%/.8 ow Distortion at 5MHz -65dBc SFDR -63dB Total Harmonic Distortion PART MAX435EXK-T MAX435EUK-T MAX435EKA-T MAX435ESA Ordering Information TEMP. RANGE -4 to to to to +85 PIN- PAKAGE 5 S7-5 5 SOT3-5 8 SOT3-8 8 SO TOP MARK AF ADRA AAI MAX435/MAX435 Typical Operating ircuit Pin onfigurations R F 4Ω TOP VIEW OUT 5 V MAX435 R TO 75Ω Z O = 75Ω V OUT V EE MAX435 IN R TIN 75Ω R O 75Ω IN+ 3 4 IN- UNITY-GAIN INE DRIVER (R = R O + R TO ) S7-5/SOT3-5 Pin onfigurations continued at end of data sheet. Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at

2 Ultra-Small, ow-ost, MHz, Dual-Supply MAX435/MAX435 ABSOUTE MAXIMUM RATINGS Supply Voltage (V to V EE )...+V IN_-, IN_+, OUT_...(V EE -.3V) to (V +.3V) Output Short-ircuit urrent to V or V EE...5mA ontinuous Power Dissipation (T A = +7 ) 5-Pin S7 (derate.5mw/ above +7 )...mw 5-Pin SOT3 (derate 7.mW/ above +7 )...57mW D EETRIA HARATERISTIS 8-Pin SOT3 (derate 5.6mW/ above +7 )...4mW 8-Pin SO (derate 5.9mW/ above +7 )...47mW Operating Temperature Range...-4 to +85 Storage Temperature Range to +5 ead Temperature (soldering, s)...+3 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or at any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. (V = +5V, V EE = -5V, R = to V, V OUT =, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = +5.) (Note PARAMETER SYMBO ONDITIONS MIN TYP MAX UNITS Input ommon-mode Voltage Range V M Guaranteed by MRR test V EE V -.5 Input Offset Voltage V OS 6 mv Input Offset Voltage Matching MAX435 only mv Input Offset Voltage Temperature oefficient T VOS 8 µv/ Input Bias urrent I B 7.5 µa Input Offset urrent I OS.5 4 µa Differential mode (-V V IN +V) 7 kω Input Resistance R IN ommon mode (-5V V M +.75V) 3 MΩ V ommon-mode Rejection Ratio MRR V EE V M (V -.5V) 7 95 db -4.5V V OUT +4.5V, R = kω 5 6 Open-oop Gain A VO -4.5V V OUT +4.5V, R = 5Ω V V OUT +3.75V, R = 75Ω 57 db Output Voltage Swing V OUT R = kω R = 5Ω R = 75Ω Output urrent I OUT R = 5Ω V - V OH.5.35 V O - V EE.65.7 V - V OH V O - V EE V - V OH V O - V EE.75.7 Sourcing 55 8 Sinking 4 75 Output Short-ircuit urrent I S Sinking or sourcing ± ma Open-oop Output Resistance R OUT 8 Ω Power-Supply Rejection Ratio PSRR V S = ±4.5V to ±5.5V 5 66 db Operating Supply-Voltage Range V S V, V EE ±4.5 ±5.5 V V ma Quiescent Supply urrent (Per Amplifier) I S ma

3 Ultra-Small, ow-ost, MHz, Dual-Supply A EETRIA HARATERISTIS (V = +5V, V EE = -5V, V M = V, R F = 4Ω, R = Ω to, A V = +V/V, T A = +5, unless otherwise noted.) PARAMETER SYMBO ONDITIONS MIN TYP MAX UNITS Small-Signal -3dB Bandwidth BW SS V OUT = mv P-P MHz arge-signal -3dB Bandwidth BW S V OUT = V P-P 75 MHz Bandwidth for.db Gain Flatness V OUT = mv P-P 55 BW.dB V OUT = V P-P 4 Slew Rate SR V OUT = V step 485 V/µs Settling Time to.% t S V OUT = V step 6 ns Rise/Fall Time t R, t F V OUT = mv P-P 4 ns Spurious-Free Dynamic Range SFDR f = 5MHz, V OUT = V P-P -65 dbc Harmonic Distortion Two-Tone, Third-Order Intermodulation Distortion HD f = 5MHz, V OUT = V P-P nd harmonic -65 3rd harmonic -58 Total harmonic distortion IP3 f = 4.7MHz, f = 4.8MHz, V OUT = V P-P 66 dbc hannel-to-hannel Isolation H ISO Specified at D, MAX435 only db Input db ompression Point f = MHz, A V = +V/V 4 dbm Differential Phase Error DP NTS, R = 5Ω.8 degrees Differential Gain Error DG NTS, R = 5Ω. % Input Noise-Voltage Density e N f = khz nv/ Hz Input Noise-urrent Density i N f = khz.8 pa/ Hz Input apacitance IN pf Output Impedance Z OUT f = MHz.5 Ω -63 MHz dbc MAX435/MAX435 Note : All devices are % production tested at T A = +5. Specifications over temperature limits are guaranteed by design. 3

4 Ultra-Small, ow-ost, MHz, Dual-Supply MAX435/MAX435 Typical Operating haracteristics (V = +5V, V EE = -5V, V M = V, A V = +V/V, R F = 4Ω, R = Ω to, T A = +5, unless otherwise noted.) GAIN (db) SMA-SIGNA GAIN vs. FREQUENY ARGE-SIGNA GAIN vs. FREQUENY GAIN FATNESS vs. FREQUENY V OUT = mv P-P 3 V OUT = V P-P.3 V OUT = mv P-P k M M M MAX435- G GAIN (db) -6 k M M M MAX435- G GAIN (db) -.6 k M M M MAX435-3 G GAIN (db) GAIN FATNESS vs. FREQUENY V OUT = V P-P MAX435 toc4 IMPEDANE (Ω). OUTPUT IMPEDANE vs. FREQUENY MAX435-5 DISTORTION (dbc) DISTORTION vs. FREQUENY V OUT = V P-P A V = +V/V ND HARMONI 3RD HARMONI MAX k M M M G. k M M M G - k M M M DISTORTION (dbc) k DISTORTION vs. FREQUENY V OUT = V P-P A V = +V/V ND HARMONI M 3RD HARMONI M MAX435-7 M DISTORTION (dbc) k DISTORTION vs. FREQUENY V OUT = V P-P A V = +5V/V ND HARMONI M 3RD HARMONI M MAX435-8 M DISTORTION (dbc) DISTORTION vs. OAD RESISTANE f O = 5MHz V OUT = V P-P A V = +V/V ND HARMONI 3RD HARMONI R OAD (Ω) MAX

5 Ultra-Small, ow-ost, MHz, Dual-Supply Typical Operating haracteristics (continued) (V = +5V, V EE = -5V, V M = V, A V = +V/V, R F = 4Ω, R = Ω to, T A = +5, unless otherwise noted.) DISTORTION (dbc) DISTORTION vs. VOTAGE SWING f O = 5MHz A V = +V/V 3RD HARMONI ND HARMONI VOTAGE SWING (Vp-p) MAX435- DIFF PHASE (degrees) DIFF GAIN (%) DIFFERENTIA GAIN AND PHASE IRE IRE MAX435- MR (db) OMMON-MODE REJETION vs. FREQUENY k M M M MAX435- G MAX435/MAX435 PSR (db) POWER-SUPPY REJETION vs. FREQUENY k M M M MAX435-3 G VSWING (V) V O - V EE OUTPUT VOTAGE SWING vs. OAD RESISTANE V - V OH R OAD (Ω) MAX mV/div OUTPUT 5mV/div SMA-SIGNA PUSE RESPONSE R F = 4Ω A V = +V/V ns/div MAX435-5 SMA-SIGNA PUSE RESPONSE SMA-SIGNA PUSE RESPONSE ARGE-SIGNA PUSE RESPONSE 5mV/div R F = 5Ω A V = +V/V MAX435-6 mv/div R F = 5Ω A V = +5V/V MAX435-7 V/div R F = 4Ω A V = +V/V MAX435-8 OUTPUT 5mV/div OUTPUT 5mV/div OUTPUT V/div ns/div ns/div ns/div 5

6 Ultra-Small, ow-ost, MHz, Dual-Supply MAX435/MAX435 Typical Operating haracteristics (continued) (V = +5V, V EE = -5V, V M = V, A V = +V/V, R F = 4Ω, R = Ω to, T A = +5, unless otherwise noted.) 5mV/div OUTPUT V/div ARGE-SIGNA PUSE RESPONSE R F = 5Ω A V = +V/V ns/div MAX435-9 V/div V/div ARGE-SIGNA PUSE RESPONSE R F = 5Ω A V = +V/V ns/div MAX435- VOTAGE NOISE (nv/ Hz) VOTAGE NOISE vs. FREQUENY k k k M M R = Ω MAX435- URRENT NOISE vs. FREQUENY R = Ω MAX ISOATION RESISTANE vs. APAITIVE OAD MAX SMA-SIGNA BANDWIDTH vs. OAD RESISTANE MAX435-4 URRENT NOISE (pa/ Hz) RISO (Ω) 4 3 SMA SIGNA (V OUT = mvp-p) BANDWIDTH (MHz) 5 k k k M M 9 ARGE SIGNA (V OUT = Vp-p) OAD (pf) R OAD (Ω) OPEN-OOP GAIN (dbc) OPEN-OOP GAIN vs. OAD RESISTANE MAX435-5 ROSSTAK (db) MAX435 ROSSTAK vs. FREQUENY MAX435-6 k k R OAD (Ω) -4.M M M M G 6

7 Ultra-Small, ow-ost, MHz, Dual-Supply MAX435 PIN Pin Description OUT Amplifier Output 4 V EE 3 INA+ 7 OUTB Amplifier B Output MAX NAME ayout and Power-Supply Bypassing These amplifiers operate from dual ±5V supplies. Bypass each supply with a.µf capacitor to ground. Maxim recommends using microstrip and stripline techniques to obtain full bandwidth. To ensure that the P board does not degrade the amplifier s performance, design it for a frequency greater than GHz. Pay care- INA- 3 IN+ Noninverting Input 4 IN- Inverting Input 5 8 V Positive Power Supply OUTA Amplifier A Output INB- INB+ FUNTION Negative Power Supply or Ground (in singlesupply operation) Amplifier A Inverting Input Amplifier A Noninverting Input Amplifier B Inverting Input Amplifier B Noninverting Input Inverting and Noninverting onfigurations Select the gain-setting feedback (R F ) and input (R G ) resistor values to fit your application (Figures a and b). arge resistor values increase voltage noise and interact with the amplifier s input and P board capacitance. This can generate undesirable poles and zeros and decrease bandwidth or cause oscillations. For example, a noninverting gain-of-two configuration (R F = R G ) using kω resistors, combined with pf of amplifier input capacitance and pf of P board capacitance, causes a pole at 59MHz. Since this pole is within the amplifier bandwidth, it jeopardizes stability. Reducing the kω resistors to Ω extends the pole frequency to.59ghz, but could limit output swing by adding Ω in parallel with the amplifier s load resistor. MAX435/MAX435 Detailed Description The MAX435/MAX435 are single-supply, rail-to-rail, voltage-feedback amplifiers that employ current-feedback techniques to achieve 485V/µs slew rates and MHz bandwidths. Excellent harmonic distortion and differential gain/phase performance make these amplifiers an ideal choice for a wide variety of video and RF signal-processing applications. The output voltage swings to within 5mV of each supply rail. ocal feedback around the output stage ensures low open-loop output impedance to reduce gain sensitivity to load variations. The input stage permits common-mode voltages beyond the negative supply and to within.5v of the positive supply rail. Applications Information hoosing Resistor Values Unity-Gain onfiguration The MAX435/MAX435 are internally compensated for unity gain. When configured for unity gain, a 4Ω resistor (R F ) in series with the feedback path optimizes A performance. This resistor improves A response by reducing the Q of the parallel circuit formed by the parasitic feedback capacitance and inductance. R G R F R TO MAX435 _ IN R TIN Figure a. Noninverting Gain onfiguration R G R F IN R TIN R TO MAX435 _ R S Figure b. Inverting Gain onfiguration OUT R O OUT R O 7

8 Ultra-Small, ow-ost, MHz, Dual-Supply MAX435/MAX435 ful attention to inputs and outputs to avoid large parasitic capacitance. Whether or not you use a constantimpedance board, observe the following design guidelines: Don t use wire-wrap boards; they are too inductive. Don t use I sockets; they increase parasitic capacitance and inductance. Use surface-mount instead of through-hole components for better high-frequency performance. Use a P board with at least two layers; it should be as free from voids as possible. Keep signal lines as short and as straight as possible. Do not make 9 turns; round all corners. Rail-to-Rail Outputs, Ground-Sensing Input The input common-mode range extends from VEE to (V -.5V) with excellent common-mode rejection. Beyond this range, the amplifier output is a nonlinear function of the input, but does not undergo phase reversal or latchup. The output swings to within 5mV of either power-supply rail with a kω load. Output apacitive oad and Stability The MAX435/MAX435 are optimized for A performance. They are not designed to drive highly reactive loads, which decrease phase margin and may produce excessive ringing and oscillation. Figure shows a circuit that eliminates this problem. Figure 3 is a graph of the Isolation Resistance (RISO) vs. apacitive oad. Figure 4 shows how a capacitive load causes excessive peaking of the amplifier s frequency response if the capacitor is not isolated from the amplifier by a resistor. A small isolation resistor (usually Ω to 3Ω) placed before the reactive load prevents ringing and oscillation. At higher capacitive loads, A performance is controlled by the interaction of the load capacitance and the isolation resistor. Figure 5 shows the effect of a 7Ω isolation resistor on closed-loop response. oaxial cable and other transmission lines are easily driven when properly terminated at both ends with their characteristic impedance. Driving back-terminated transmission lines essentially eliminates the line s capacitance. 3 R G R F 5 V IN R TIN 5Ω MAX435 _ R ISO V OUT ISOATION RESISTANE (Ω) APAITIVE OAD (pf) Figure. Driving a apacitive oad Through an Isolation Resistor Figure 3. Isolation Resistance vs. apacitive oad 8

9 Ultra-Small, ow-ost, MHz, Dual-Supply GAIN (db) = pf = 5pF k M M M = 5pF Figure 4. Small-Signal Gain vs. Frequency with oad apacitance and No Isolation Resistor G GAIN (db) R ISO = 7Ω = 68pF = pf k M M M = 47pF Figure 5. Small-Signal Gain vs. Frequency with oad apacitance and 7Ω Isolation Resistor G MAX435/MAX435 Pin onfigurations (continued) hip Information TOP VIEW MAX435 TRANSISTOR OUNT: 86 MAX435 TRANSISTOR OUNT: 7 OUTA 8 V OUTB INB- INA- INA+ 3 MAX V EE 4 5 INB+ SOT3-8/SO 9

10 Ultra-Small, ow-ost, MHz, Dual-Supply MAX435/MAX435 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to S7, 5.EPS PAKAGE OUTINE, 5 S7-76 SOT-3 5.EPS PAKAGE OUTINE, SOT-3, 5-57 E

11 Ultra-Small, ow-ost, MHz, Dual-Supply Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to PIN I.D. DOT (SEE NOTE 6) A NOTE: A. A DIMENSIONS ARE IN MIIMETERS. e D. FOOT ENGTH MEASURED FROM EAD TIP TO UPPER RADIUS OF HEE OF THE EAD PARAE TO SEATING PANE. 3. PAKAGE OUTINE EXUSIVE OF MOD FASH & META BURR. 4. PAKAGE OUTINE INUSIVE OF SODER PATING. 5. OPANARITY 4 MIS. MAX. b 6. PIN I.D. DOT IS.3 MM ÿ MIN. OATED ABOVE PIN. 7. SODER THIKNESS MEASURED AT FAT SETION OF EAD BETWEEN.8mm AND.5mm FROM EAD TIP. 8. MEETS JEDE MO78. e A E SEE DETAI "A" E SEATING PANE PROPRIETARY INFORMATION TITE: APPROVA SYMBO A A A b D E E e e DETAI "A" MIN MAX BS..65 BS..95 REF. 8 DOUMENT ONTRO NO. -78 GAUGE PANE PAKAGE OUTINE, SOT-3, 8 BODY D REV. SOT3, 8.EPS MAX435/MAX435 N E H INHES MIIMETERS DIM MIN MAX MIN MAX A A B e.5 BS.7 BS E H SOIN.EPS TOP VIEW VARIATIONS: DIM D D D INHES MIIMETERS MIN MAX MIN MAX N MS AA AB A D A e B A FRONT VIEW SIDE VIEW -8 PROPRIETARY INFORMATION TITE: PAKAGE OUTINE,.5" SOI DOUMENT ONTRO NO. REV. -4 B Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, San Gabriel Drive, Sunnyvale, A Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. APPROVA

12 Mouser Electronics Authorized Distributor lick to View Pricing, Inventory, Delivery & ifecycle Information: Maxim Integrated: MAX435EUK+T MAX435EXK+T MAX435EKA+T MAX435ESA+ MAX435ESA+T