TYPICAL APPLICATIO. LT MHz, 250V/µs, A V 4 Operational Amplifier DESCRIPTIO FEATURES APPLICATIO S

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5MHz, 5V/µs, A V Operational Amplifier FEATRES Gain-Bandwidth: 5MHz Gain of Stable Slew Rate: 5V/µs Input Noise Voltage: nv/ Hz C-Load TM Op Amp Drives Capacitive Loads Maximum Input Offset Voltage:

1 5MHz, 5V/µs, A V Operational Amplifier FEATRES Gain-Bandwidth: 5MHz Gain of Stable Slew Rate: 5V/µs Input Noise Voltage: nv/ Hz C-Load TM Op Amp Drives Capacitive Loads Maximum Input Offset Voltage: µv Maximum Input Bias Current: 3nA Maximum Input Offset Current: 3nA Minimum Output Swing Into 5Ω: ±V Minimum DC Gain: 5V/mV, R L = 5Ω Settling Time to.%: 5ns, V Step Settling Time to.%: 5ns, V Step Differential Gain:.%, A V =, R L = 5Ω Differential Phase:., A V =, R L = 5Ω APPLICATIO S Wideband Amplifiers Buffers Active Filters Video and RF Amplification Cable Drivers -, -, -Bit Data Acquisition Systems DESCRIPTIO The LT is a very high speed operational amplifier with superior DC performance. The is stable in a noise gain of or greater. It features reduced input offset voltage, lower input bias currents and higher DC gain than devices with comparable bandwidth and slew rate. The circuit is a single gain stage that includes proprietary DC gain enhancement circuitry to obtain precision with high speed. The high gain and fast settling time make the circuit an ideal choice for data acquisition systems. The circuit is also capable of driving capacitive loads which makes it useful in buffer or cable driver applications. The is a member of a family of fast, high performance amplifiers that employ Linear Technology Corporation s advanced complementary bipolar processing. For unity-gain stable applications the LT can be used, and for gains of or greater the LT can be used., LTC and LT are registered trademarks of Linear Technology Corporation C-Load is a trademark of Linear Technology Corporation TYPICAL APPLICATIO Summing Amplifier Large-Signal Response Summing Amplifier V A V B V C V OT TA V IN = V P-P f = MHz TA

2 ABSOLTE AXI RATI GS W W W Total Supply Voltage (V to V )... 3V Differential Input Voltage... ±V Input Voltage... ±V S Output Short-Circuit Duration (Note )... Indefinite Specified Temperature Range C (Note 3)... C to 7 C M (OBSOLETE) C to 5 C (Note ) Operating Temperature Range C... C TO 5 C M (OBSOLETE) C to 5 C Maximum Junction Temperature (See Below) Plastic Package... 5 C Ceramic Package (OBSOLETE) C Storage Temperature Range... 5 C to 5 C Lead Temperature (Soldering, sec)... 3 C PACKAGE/ORDER I FOR TOP VIEW NLL NLL 7 V IN IN 3 5 NC V H PACKAGE -LEAD TO-5 METAL CAN T JMAX = 75 C, θ JA = 5 C/W V OT W ATIO ORDER PART NMBER SPECIAL ORDER CONSLT FACTORY NLL IN IN V 3 TOP VIEW 7 5 NLL V V OT NC N PACKAGE S PACKAGE -LEAD PLASTIC DIP -LEAD PLASTIC SOIC T JMAX = 5 C, θ JA = 3 C/W (N) T JMAX = 5 C, θ JA = 9 C/W (S) J PACKAGE -LEAD CERAMIC DIP T JMAX = 75 C, θ JA = C/W (J) ORDER PART NMBER CN CS S PART MARKING ORDER PART NMBER Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V OS Input Offset Voltage (Note ) µv I OS Input Offset Current 3 na I B Input Bias Current 3 na e n Input Noise Voltage f = Hz nv/ Hz i n Input Noise Current f = Hz pa/ Hz R IN Input Resistance V CM = ±V 5 MΩ Differential kω C IN Input Capacitance pf Input Voltage Range (Positive) V Input Voltage Range (Negative) 3 V CMRR Common Mode Rejection Ratio V CM = ±V 9 db PSRR Power Supply Rejection Ratio V S = ±5V to ±5V 9 db A VOL Large-Signal Voltage Gain V OT = ±V, R L = 5Ω 5 V/mV V OT Output Swing R L = 5Ω 3 ±V I OT Output Current V OT = ±V ma SR Slew Rate (Note 5) 5 V/µs OBSOLETE PACKAGE Consider the N or S Package for Alternate Source MJ OBSOLETE PACKAGE Consider the N Package for Alternate Source,,, V CM = V, unless otherwise specified. Full Power Bandwidth V Peak (Note ) MHz GBW Gain-Bandwidth f = MHz 5 MHz

3 ELECTRICAL CHARACTERISTICS,, V CM = V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS t r, t f Rise Time, Fall Time A V =, % to 9%,.V 3. ns Overshoot A V =,.V % Propagation Delay A V =, 5% V IN to 5% V OT,.V 5. ns t s Settling Time V Step,.% 5 ns V Step,.% 5 ns Differential Gain f = 3.5MHz, R L = 5Ω (Note 7). % f = 3.5MHz, R L = (Note 7). % Differential Phase f = 3.5MHz, R L = 5Ω (Note 7). DEG f = 3.5MHz, R L = (Note 7).5 DEG R O Output Resistance A V =, f = MHz.3 Ω I S Supply Current.5 ma The denotes the specifications which apply over the temperature range C T A 7 C, otherwise specifications are at., V CM = V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V OS Input Offset Voltage (Note )..5 mv Input V OS Drift 5 µv/ C I OS Input Offset Current na I B Input Bias Current na CMRR Common Mode Rejection Ratio V CM = ±V 9 db PSRR Power Supply Rejection Ratio V S = ±5V to ±5V 9 db A VOL Large-Signal Voltage Gain V OT = ±V, R L = 5Ω V/mV V OT Output Swing R L = 5Ω 3 ±V I OT Output Current V OT = ±V ma SR Slew Rate (Note 5) 5 V/µs I S Supply Current ma The denotes the specifications which apply over the temperature range 55 C T A 5 C, otherwise specifications are at., V CM = V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX NITS V OS Input Offset Voltage (Note ). mv Input V OS Drift 5 µv/ C I OS Input Offset Current na I B Input Bias Current na CMRR Common Mode Rejection Ratio V CM = ±V 9 db PSRR Power Supply Rejection Ratio V S = ±5V to ±5V 9 db A VOL Large-Signal Voltage Gain V OT = ±V, R L = 5Ω.5 V/mV V OT Output Swing R L = 5Ω 3 ±V R L = 3 ±V I OT Output Current V OT = ±V ma V OT = ±V 3 ma SR Slew Rate (Note 5) 3 5 V/µs I S Supply Current ma Note : Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note : A heat sink may be required when the output is shorted indefinitely. Note 3: Commercial parts are designed to operate over C to 5 C, but are not tested nor guaranteed beyond C to 7 C. Industrial grade parts specified and tested over C to 5 C are available on special request. Consult factory. Note : Input offset voltage is pulse tested and is exclusive of warm-up drift. Note 5: Slew rate is measured between ±V on an output swing of ±V. Note : FPBW = SR/πV P. Note 7: Differential Gain and Phase are tested in A V = with five amps in series. Attenuators of / are used as loads (3.5Ω, Ω and 9Ω, 75Ω). 3

4 TYPICAL PERFORMANCE CHARACTERISTICS W MAGNITDE OF INPT VOLTAGE (V) 5 5 Input Common Mode Range vs Supply Voltage V OS =.5mV V CM V CM SPPLY CRRENT (ma) 9 7 Supply Current vs Supply Voltage and Temperature T = 5 C T = 5 C T = 55 C MAGNITDE OF OTPT VOLATGE (V) 5 5 Output Voltage Swing vs Supply Voltage R L = 5Ω V OS = 3mV V SW V SW 5 5 SPPLY VOLTAGE (±V) SPPLY VOLTAGE (±V) 5 5 SPPLY VOLTAGE (±V) TPC TPC TPC3 OTPT VOLTAGE SWING (V P-P ) Output Voltage Swing vs Resistive Load V OS = 3mV ±5V SPPLIES ±5V SPPLIES INPT BIAS CRRENT (na) Input Bias Current vs Input Common Mode Voltage I B I B OPEN-LOOP GAIN (db) 9 7 Open-Loop Gain vs Resistive Load V S = ±5V LOAD RESISTANCE (Ω) INPT COMMON MODE VOLTAGE (V) LOAD RESISTANCE (Ω) TPC TPC5 TPC OTPT SHORT-CIRCIT CRRENT (ma) Output Short-Circuit Current vs Temperature V S = ±5V TEMPERATRE ( C) INPT NOISE VOLTAGE (nv/ Hz) Input Noise Spectral Density i n e n A V = R S =. FREQENCY (Hz) INPT NOISE CRRENT (pa/ Hz) POWER SPPLY REJECTION RATIO (db) Power Supply Rejection Ratio vs Frequency PSRR PSRR M M M FREQENCY (Hz) TPC7 TPC TPC9

5 TYPICAL PERFORMANCE CHARACTERISTICS W COMMON MODE REJECTION RATIO (db) Common Mode Rejection Ratio vs Frequency M M M FREQENCY (Hz) TPC OTPT SWING (V) Output Swing and Error vs Settling Time (Noninverting) mv mv mv mv SETTLING TIME (ns) LT TPC OTPT SWING (V) Output Swing and Error vs Settling Time (Inverting) mv mv mv mv SETTLING TIME (ns) TPC VOLTAGE GAIN (db) Voltage Gain and Phase vs Frequency V S = ±5V V S = ±5V M M M FREQENCY (Hz) TPC3 PHASE MARGIN (DEG) VOLTAGE MAGNITDE (db) Frequency Response vs Capacitive Load A V = 5 C = 5pF C = pf FREQENCY (MHz) C = pf C = 5pF C = TPC OTPT IMPEDANCE (Ω).. Closed-Loop Output Impedance vs Frequency A V =. M M M FREQENCY (Hz) TPC5 GAIN-BANDWIDTH (MHz) Gain-Bandwidth vs Temperature TEMPERATRE ( C) TPC 5 SLEW RATE (V/µs) Slew Rate vs Temperature A V = 5 SR = (SR ) (SR ) TEMPERATRE ( C) TPC9 5 TOTAL HARMONIC DISTORTION AND NOISE (%).. Total Harmonic Distortion vs Frequency V O = 3V RMS R L = 5Ω A V =. A V = FREQENCY (Hz) LT TPC 5

TYPICAL PERFORMANCE CHARACTERISTICS W Small Signal, A V = Large Signal, A V = Large Signal, A V =, C L =,pf V IN = 5mV f = 5MHz TPC9 V IN = 5V P-P f = MHz TPC V IN = 5V P-P f = khz TPC

in noise gains of or greater and may be inserted directly into HA5//5, HA5//, AD7, AD7, EL, EL and LM3 applications, provided that the nulling circuitry is removed and the amplifier

µF AI Layout and Passive Components The amplifier is easy to apply and tolerant of less than ideal layouts.

For high drive current applications use low ESR bypass capacitors (µf to µf tantalum).

6 TYPICAL PERFORMANCE CHARACTERISTICS W Small Signal, A V = Large Signal, A V = Large Signal, A V =, C L =,pf V IN = 5mV f = 5MHz TPC9 V IN = 5V P-P f = MHz TPC V IN = 5V P-P f = khz TPC Small Signal, A V = Large Signal, A V = Small Signal, A V =, C L =,pf V IN = 5mV TPC TPC3 TPC f = 5MHz f = MHz f = 5kHz V IN = 5V P-P V IN = mv APPLICATIONS INFORMATION W The is stable in noise gains of or greater and may be inserted directly into HA5//5, HA5//, AD7, AD7, EL, EL and LM3 applications, provided that the nulling circuitry is removed and the amplifier configuration has a high enough noise gain. The suggested nulling circuit for the is shown in the following figure. V 5k 3 7 Offset Nulling V.µF.µF AI Layout and Passive Components The amplifier is easy to apply and tolerant of less than ideal layouts. For maximum performance (for example, fast settling time) use a ground plane, short lead lengths and RF-quality bypass capacitors (.µf to.µf). For high drive current applications use low ESR bypass capacitors (µf to µf tantalum). Sockets should be avoided when maximum frequency performance is required, although low profile sockets can provide reasonable performance up to 5MHz. For more details see Design Note 5. Feedback resistors greater than 5k are not recommended because a pole is formed with the input capacitance which can cause peaking or oscillations. Input Considerations Bias current cancellation circuitry is employed on the inputs of the so the input bias current and input

7 APPLICATIONS INFORMATION W offset current have identical specifications. For this reason, matching the impedance on the inputs to reduce bias current errors is not necessary. Capacitive Loading The is stable with capacitive loads. This is accomplished by sensing the load induced output pole and adding compensation at the amplifier gain node. As the capacitive load increases, both the bandwidth and phase margin decrease. There will be peaking in the frequency domain as shown in the curve of Frequency Response vs Capacitive Load. The small-signal transient response will have more overshoot as shown in the photo of the small-signal response with pf load. The large-signal response with a,pf load shows the output slew rate being limited to V/µs by the short-circuit current. The can drive coaxial cable directly, but for best pulse fidelity a resistor of value equal to the characteristic impedance of the cable (i.e., 75Ω) should be placed in series with the output. The other end of the cable should be terminated with the same value resistor to ground. Compensation The has a typical gain-bandwidth product of 5MHz which allows it to have wide bandwidth in high gain configurations (i.e., in a gain of, it will have a bandwidth of about 5MHz). The amplifier is stable in a noise gain of so the ratio of the signal at the inverting input to the output must be / or less. Straightforward gain configurations of or 3 are stable, but there are several others that allow the amplifier to be stable for lower signal gains (the noise gain, however, remains or more). One example is the summing amplifier on the first page of this data sheet. Each input signal has a gain of to the output, but it is easily seen that this configuration is equivalent to a gain of 3 as far as the amplifier is concerned. Another circuit is shown below with a DC gain of, but an AC gain of 5. The break frequency of the R-C combination across the amplifier inputs should be approximately a factor of less than the gain-bandwidth of the amplifier divided by the high frequency gain (in this case / of 5MHz/5 or 3MHz). SI PLIFIED SCHE ATIC W W V 7 NLL BIAS BIAS OT IN 3 IN V SS 7

8 PACKAGE DESCRIPTIO H Package -Lead TO-5 Metal Can (. Inch PCD) (Reference LTC DWG # 5--3) SEATING PLANE..5* (.5.3) ( ) DIA ( ). (.) MAX.5 (.7) MAX.5.5 (.9.99)..** (..533) GAGE PLANE.5.75 (.7 9.5) REFERENCE PLANE 5 TYP..3 (.7.).7.5 (..3) PIN. (5.) TYP.. (.79.) INSLATING STANDOFF * LEAD DIAMETER IS NCONTROLLED BETWEEN THE REFERENCE PLANE AND.5" BELOW THE REFERENCE PLANE.. ** FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (..) OBSOLETE PACKAGE H(TO-5). PCD 97

9 PACKAGE DESCRIPTIO J Package -Lead CERDIP (Narrow.3 Inch, Hermetic) (Reference LTC DWG # 5--).5. (.3.77) FLL LEAD OPTION.3 BSC (.7 BSC) CORNER LEADS OPTION ( PLCS).3.5 (.5.3) HALF LEAD OPTION.5 (.7) MIN.5 (.35) RAD TYP.5 (.7) MAX ( ). (5.) MAX.5. (.3.5).. (.3.57) 5 NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS.5.5 (.3.5).. (.3.). (.5) BSC MIN J 9 OBSOLETE PACKAGE 9

10 PACKAGE DESCRIPTIO N Package -Lead PDIP (Narrow.3 Inch) (Reference LTC DWG # 5--5).* (.) MAX ±.5* (.77 ±.3) (7..55).5.5 (.3.5).3 ±.5 (3.3 ±.7).9.5 (.9.3) ( ).5 (.5) TYP. (.5) BSC *THESE DIMENSIONS DO NOT INCLDE MOLD FLASH OR PROTRSIONS. MOLD FLASH OR PROTRSIONS SHALL NOT EXCEED. INCH (.5mm).5 (3.75) MIN. ±.3 (.57 ±.7). (.5) MIN N 9

11 PACKAGE DESCRIPTIO S Package -Lead Plastic Small Outline (Narrow.5 Inch) (Reference LTC DWG # 5--).9.97* (. 5.) ( ).5.57** (3. 3.9) SO (.3.5).. (.5.5) 5 TYP.53.9 (.3.75).. (..5)..5 (..7) * DIMENSION DOES NOT INCLDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED." (.5mm) PER SIDE ** DIMENSION DOES NOT INCLDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED." (.5mm) PER SIDE..9 (.355.3) TYP.5 (.7) BSC Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

12 TYPICAL APPLICATIO S Lag Compensation MHz, A V = 5 Instrumentation Amplifier V IN V IN 5Ω pf k V OT 5Ω A V =, f < 3MHz TA pf 5Ω V OT Cable Driver TA3 V IN.5k 75Ω 75Ω CABLE V OT 75Ω 5Ω TA5 RELATED PARTS PART NMBER DESCRIPTION COMMENTS LT 5MHz, 5V/µs Amplifier nity Gain Stable Version of the LT 5MHz, V/µs Amplifier A V Version of the fb LT/CP 9.5K REV B PRINTED IN SA Linear Technology Corporation 3 McCarthy Blvd., Milpitas, CA () 3-9 FAX: () LINEAR TECHNOLOGY CORPORATION 99

APPLICATIONS LT1351. Operational Amplifier DESCRIPTION FEATURES TYPICAL APPLICATION

APPLICATIONS LT1351. Operational Amplifier DESCRIPTION FEATURES TYPICAL APPLICATION FEATRES 3MHz Gain Bandwidth V/µs Slew Rate 5µA Supply Current Available in Tiny MSOP Package C-Load TM Op Amp Drives All Capacitive Loads nity-gain Stable Power Saving Shutdown Feature Maximum Input Offset