Datasheet

ManualsBrandsLinear Technology ManualsAmplifiers & ComparatorsOperational Amplifier 36MHz MSOP-

LT6274/LT6275

6275fa

For more information www.linear.com/LT6275

TYPICAL APPLICATION

FEATURES DESCRIPTION

90MHz, 2200V/µs

30V Low Power Op Amps

The LT

6274/LT6275 are single/dual low power, high

speed, very high slew rate operational amplifiers with

outstanding AC and DC performance. The circuit topology

is a voltage feedback amplifier with matched high imped-

ance inputs plus the enhanced slewing performance of a

current

feedback amplifier. The high slew rate and single

stage design provide excellent settling characteristics that

make the circuit an ideal choice for data acquisition sys-

tems. Each output drives a 1k load to ±13.25V with ±15V

supplies and a

500Ω load to ±3.5V on ±5V supplies. The

LT6274/LT6275 are stable with any capacitive load mak

ing them useful in buffer or cable driving applications.

The LT6274 single op amp is available in a 5-lead TSOT-23

package, and the LT6275 dual op amp is available in an

8-lead MSOP package. They operate with guaranteed

specifications over the –40°C to 85°C and –40°C to 125°C

temperature ranges.

APPLICATIONS

2200V/μs Slew Rate

90MHz –3dB Bandwidth (A

= +1)

40MHz Gain-Bandwidth Product

1.6mA Supply Current per Amplifier

C-Load™ Op Amp Drives All Capacitive Loads

±4.5V to ±16V Operating Supply Range

Unity-Gain Stable

10nV/√Hz Input Noise Voltage

400µV Maximum Input Offset Voltage

500nA Maximum Input Bias Current

30nA Maximum Input Offset Current

±13.25V Minimum Output Swing into 1k (±15V Supply)

±3.5V Minimum Output Swing into 500Ω (±5V Supply)

74dB Minimum Open-Loop Gain, R

= 1k

40ns Settling Time to 1%, 10V Step

Specified at ±5V and ±15V

Single in 5-Lead TSOT-23 Package

Dual in 8-Lead MSOP Package

Wideband Large Signal Amplification

Cable Drivers

Buffers

Automated Test Equipment

Data Acquisition Systems

High Fidelity Video and Audio Amplification

All registered trademarks and trademarks are the property of their respective owners. All other

trademarks are the property of their respective owners.

6275 TA01

15V

–15V

OUT

= –1

FPBW = 3MHz

–

LT627410V

–10V

10V

–10V

Undistorted Output Swing vs Frequency

Wideband Large Signal Amplification

= ±15V

= 1k

1% MAX DISTORTION

= +1

= –1

= –10

FREQUENCY (Hz)

100k

10M

100M

OUTPUT VOLTAGE (V

P-P

)

6275 G31

Downloaded from Arrow.com.

Summary of content (20 pages)

PAGE 1
LT6274/LT6275 90MHz, 2200V/µs 30V Low Power Op Amps FEATURES DESCRIPTION 2200V/μs Slew Rate nn 90MHz –3dB Bandwidth (A = +1) V nn 40MHz Gain-Bandwidth Product nn 1.6mA Supply Current per Amplifier nn C-Load™ Op Amp Drives All Capacitive Loads nn ±4.5V to ±16V Operating Supply Range nn Unity-Gain Stable nn 10nV/√Hz Input Noise Voltage nn 400µV Maximum Input Offset Voltage nn 500nA Maximum Input Bias Current nn 30nA Maximum Input Offset Current nn ±13.25V Minimum Output Swing into 1k (±15V Supply) nn ±3.
PAGE 2
LT6274/LT6275 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ – V–)....................................................................34V Differential Input Voltage (Transient Only) (Note 2)......................................... ±10V Input Voltage....................................................... V– to V+ Input Current (+IN, –IN) (Note 3)................................................ ±10mA Output Current (Note 12)................................
PAGE 3
LT6274/LT6275 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Unless noted otherwise, VCM = 0V, and specifications apply at both VS = (V+ – V–) = ±5V and ±15V. SYMBOL PARAMETER VOS CONDITIONS MIN Input Offset Voltage (Note 7) TYP MAX UNITS ±0.15 ±0.4 ±1.
PAGE 4
LT6274/LT6275 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Unless noted otherwise, VCM = 0V, and specifications apply at both VS = (V+ – V–) = ±5V and ±15V. SYMBOL PARAMETER CONDITIONS tR, tF Small Signal Rise/Fall Time AV = 1, 10% – 90%, 100mV Input Step 4 ns tPD Propagation Delay 50% VIN to 50% VOUT, 100mV Input Step 4 ns ts Settling Time 1% of 10V Step, AV = 1, VS = ±15V 0.
PAGE 5
LT6274/LT6275 TYPICAL PERFORMANCE CHARACTERISTICS Input Offset Voltage vs Input Common Mode Voltage 200 35 2.5 100 30 25°C 1.5 –40°C 1.0 0.
PAGE 6
LT6274/LT6275 TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage Swing vs Supply Voltage V+ VS = ±5V 4.0 VIN = ±20mV TA = 25°C 3.5 3.0 2.5 2.0 1.5 1.
PAGE 7
LT6274/LT6275 TYPICAL PERFORMANCE CHARACTERISTICS Closed-Loop Output Impedance vs Frequency 70 100 PHASE 60 GAIN (dB) 40 –120 GAIN 30 –150 20 10 1k –180 –10 10k 100k 1M FREQUENCY (Hz) 10M –20 10k 100M 100k 1M 10M FREQUENCY (Hz) 6275 G20 50 45 45 GAIN-BANDWIDTH PRODUCT 40 0 5 C=0 –10 10 15 20 25 30 TOTAL SUPPLY VOLTAGE (V) 35 –20 100k 30 POWER SUPPLY REJECTION RATIO (dB) CROSSTALK (dB) –80 –90 VS = ±5V RL = 500Ω VS = ±15V RL = 1k 100k 1M 10M FREQUENCY (Hz) 100M 6275 G26 0
PAGE 8
LT6274/LT6275 TYPICAL PERFORMANCE CHARACTERISTICS 2nd and 3rd Harmonic Distortion vs Frequency (AV = 1) –50 –60 –70 –80 3RD HARMONIC –90 –100 –110 –120 2ND HARMONIC 1k 10k 100k FREQUENCY (Hz) 1M 25 –50 –60 –70 –80 3RD HARMONIC –90 –100 –110 2ND HARMONIC –120 –140 100 10M 1k 10k 100k FREQUENCY (Hz) 1M Undistorted Output Swing vs Frequency SLEW RATE (V/µs) OUTPUT VOLTAGE (VP-P) TA = 25°C AV = –1 RG = RF = 2k 2000 20% to 80% OF STEP AV = –10 AV = –1 4 2 10M 1M 10M FREQUENCY (Hz) 100M
PAGE 9
LT6274/LT6275 TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Step Response (AV = 1) Small-Signal Step Response (AV = –1) VS = ±15V Small-Signal Step Response (AV = 1, CL = 10nF) VS = ±15V 20mV/DIV 20mV/DIV 20mV/DIV VS = ±15V RG = RF = 2k 20ns/DIV 500ns/DIV 20ns/DIV 6275 G37 6275 G39 6275 G38 Large-Signal Step Response (AV = 1) Large-Signal Step Response (AV = –1) Large-Signal Step Response (AV = 1, CL = 10nF) VS = ±15V RG = RF =2k 5V/DIV 5V/DIV VS = ±15V 5V/DIV VS = ±15V 50ns/DIV 50
PAGE 10
LT6274/LT6275 SIMPLIFIED SCHEMATIC (ONE AMPLIFIER SHOWN) V+ –IN R1 1k +IN RC C V– 10 Downloaded from Arrow.com. OUT CC 6275 SS01 6275fa For more information www.linear.
PAGE 11
LT6274/LT6275 PIN FUNCTIONS V –: Negative Supply Voltage. Total supply voltage (V+ – V–) ranges from 9V to 32V. –IN: Inverting Input of Amplifier. +IN: Noninverting Input of Amplifier. V+: Positive Supply Voltage. Total supply voltage (V+ – V–) ranges from 9V to 32V. OUT: Amplifier Output. 6275fa For more information www.linear.com/LT6275 Downloaded from Arrow.com.
PAGE 12
LT6274/LT6275 APPLICATIONS INFORMATION Circuit Operation Comparison to Current Feedback Amplifiers The LT6274/LT6275 circuit topology is a true voltage feedback amplifier that has the slewing behavior of a current feedback amplifier. The operation of the circuit can be understood by referring to the simplified schematic. The inputs are buffered by complementary NPN and PNP emitter followers that drive a 1k resistor.
PAGE 13
LT6274/LT6275 APPLICATIONS INFORMATION large slewing outputs, and the increased power is proportional to the magnitude of the differential input voltage and the percent of the time that the inputs are apart. Measure the average supply current for the application in order to calculate the power dissipation. combination of the feedback resistor and gain setting resistor on the inverting input combines with the total capacitance on that node, CIN, to form a pole which can cause peaking or oscillations.
PAGE 14
LT6274/LT6275 TYPICAL APPLICATIONS Noninverting Amplifier Slew Rate and Step Response RG RF Figure 1 shows a noninverting amplifier with closed-loop gain of 11V/V. The closed-loop bandwidth of this amplifier is approximately GBW/11 (GBW = Gain-Bandwidth Product). For a step input, the output follows an exponential curve: 200 2k ⎞⎞ ⎟ ⎠⎟ ⎟⎟ ⎠ 1/2 LT6275 VIN VOUT –15V 6275 TA06 (1) where τ = time constant associated with the closed-loop bandwidth.
PAGE 15
LT6274/LT6275 TYPICAL APPLICATIONS Using the LT6274/LT6275 to Create a Composite Amplifier with High Gain, High Bandwidth and Large Output Signal Capability While the LT6274/LT6275 provide ample slew rate and large output swing capability, the GBW is not so large as to achieve high gain, high bandwidth, and high amplitude at the same time. The circuit of Figure 3 harnesses the high slew rate capability of the LT6275 by placing it under control of the LTC6252, an op amp with greater than 700MHz GBW.
PAGE 16
LT6274/LT6275 TYPICAL APPLICATIONS Pulse Response 15 Sine Waves 9 OUTPUT VOLTAGE (V) 6 3 0 –3 –6 –9 –12 –15 200ns/DIV 6275 TA12 Figure 5. Composite Amplifier Step Response at Various Output Step Amplitudes (AV = –11V/V) 25 225 20 180 15 135 10 90 5 45 0 0 –5 –45 –10 –90 PHASE (DEG) The composite amplifier of Figure 3 was also tested with sine waves. Figure 6 shows the small signal closed-loop gain and phase response.
PAGE 17
LT6274/LT6275 PACKAGE DESCRIPTION Please refer to http://www.linear.com/product/LT6274#packaging for the most recent package drawings. S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.
PAGE 18
LT6274/LT6275 PACKAGE DESCRIPTION Please refer to http://www.linear.com/product/LT6275#packaging for the most recent package drawings. MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev G) 0.889 ±0.127 (.035 ±.005) 5.10 (.201) MIN 3.20 – 3.45 (.126 – .136) 3.00 ±0.102 (.118 ±.004) (NOTE 3) 0.65 (.0256) BSC 0.42 ± 0.038 (.0165 ±.0015) TYP 8 7 6 5 0.52 (.0205) REF RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 ±0.102 (.118 ±.004) (NOTE 4) 4.90 ±0.152 (.193 ±.
PAGE 19
LT6274/LT6275 REVISION HISTORY REV DATE DESCRIPTION A 12/17 Added LT6274 Updated Power Dissipation section PAGE NUMBER All 13 6275fa Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice.
PAGE 20
LT6274/LT6275 TYPICAL APPLICATION Composite Amplifier Provides 18-Bit Precision and Fast Settling 15V 12V IN LTC6655-5 + OUT LT1012 0.