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LT1360

50MHz, 800V/µs Op Amp

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Wideband Amplifiers

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Buffers

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Active Filters

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Video and RF Amplification

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Cable Drivers

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Data Acquisition Systems

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50MHz Gain Bandwidth

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800V/µs Slew Rate

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5mA Maximum Supply Current

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9nV/√Hz Input Noise Voltage

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Unity-Gain Stable

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C-Load

Op Amp Drives All Capacitive Loads

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1mV Maximum Input Offset Voltage

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1µA Maximum Input Bias Current

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250nA Maximum Input Offset Current

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±13V Minimum Output Swing into 500Ω

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±3.2V Minimum Output Swing into 150Ω

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4.5V/mV Minimum DC Gain, R

=1k

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60ns Settling Time to 0.1%, 10V Step

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0.2% Differential Gain, A

=2, R

=150Ω

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0.3° Differential Phase, A

=2, R

=150Ω

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Specified at ±2.5V, ±5V, and ±15V

The LT1360 is a high speed, very high slew rate opera-

tional amplifier with excellent DC performance. The LT1360

features reduced supply current, lower input offset volt-

age, lower input bias current and higher DC gain than

devices with comparable bandwidth. The circuit topology

is a voltage feedback amplifier with the slewing character-

istics of a current feedback amplifier. The amplifier is a

single gain stage with outstanding settling characteristics

which makes the circuit an ideal choice for data acquisition

systems. The output drives a 500Ω load to ±13V with ±15V

supplies and a 150Ω load to ±3.2V on ±5V supplies. The

amplifier is also capable of driving any capacitive load

which makes it useful in buffer or cable driver applications.

The LT1360 is a member of a family of fast, high

performance amplifiers using this unique topology and

employing Linear Technology Corporation’s advanced

bipolar complementary processing. For dual and quad

amplifier versions of the LT1360 see the LT1361/LT1362

data sheet. For 70MHz amplifiers with 6mA of supply

current per amplifier see the LT1363 and LT1364/LT1365

data sheets. For lower supply current amplifiers with

bandwidths of 12MHz and 25MHz see the LT1354

through LT1359 data sheets. Singles, duals and quads of

each amplifier are available.

Two Op Amp Instrumentation Amplifier

1360 TA01

TRIM R5 FOR GAIN

TRIM R1 FOR COMMON-MODE REJECTION

BW = 500kHz

10k

220Ω

10k

OUT

–

LT1360

GAIN

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

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102

= –1 Large-Signal Response

1360 TA02

C-Load is a trademark of Linear Technology Corporation.

APPLICATIO S

TYPICAL APPLICATIO

FEATURES

DESCRIPTIO

, LTC and LT are registered trademarks of Linear Technology Corporation.

Summary of content (17 pages)

PAGE 1
LT1360 50MHz, 800V/µs Op Amp U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 50MHz Gain Bandwidth 800V/µs Slew Rate 5mA Maximum Supply Current 9nV/√Hz Input Noise Voltage Unity-Gain Stable C-LoadTM Op Amp Drives All Capacitive Loads 1mV Maximum Input Offset Voltage 1µA Maximum Input Bias Current 250nA Maximum Input Offset Current ±13V Minimum Output Swing into 500Ω ±3.2V Minimum Output Swing into 150Ω 4.5V/mV Minimum DC Gain, RL=1k 60ns Settling Time to 0.1%, 10V Step 0.
PAGE 2
LT1360 W W U W ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V + to V –) ............................... 36V Differential Input Voltage (Transient Only) (Note 2)................................... ±10V Input Voltage ............................................................ ±VS Output Short Circuit Duration (Note 3) ............ Indefinite Operating Temperature Range (Note 8) ...–40°C to 85°C Specified Temperature Range (Note 9) ....
PAGE 3
LT1360 ELECTRICAL CHARACTERISTICS TA = 25°C, VCM = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS VSUPPLY MIN TYP AVOL Large-Signal Voltage Gain VOUT = ±12V, RL = 1k VOUT = ±10V, RL = 500Ω VOUT = ±2.5V, RL = 500Ω VOUT = ±2.5V, RL = 150Ω VOUT = ±1V, RL = 500Ω VOUT Output Swing IOUT Output Current MAX UNITS ±15V ±15V ±5V ±5V ±2.5V 4.5 3.0 3.0 1.5 2.5 9.0 6.5 6.4 4.2 5.
PAGE 4
LT1360 ELECTRICAL CHARACTERISTICS 0°C ≤ TA ≤ 70°C, VCM = 0V unless otherwise noted. The ● denotes the specifications which apply over the temperature range SYMBOL PARAMETER CONDITIONS VSUPPLY VOS Input Offset Voltage (Note 4) ±15V ±5V ±2.5V ● ● ● MIN Input VOS Drift (Note 7) ±2.5V to ±15V ● TYP 9 MAX UNITS 1.5 1.5 1.7 mV mV mV 12 µV/°C IOS Input Offset Current ±2.5V to ±15V ● 350 nA IB Input Bias Current ±2.5V to ±15V ● 1.
PAGE 5
LT1360 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the temperature range – 40°C ≤ TA ≤ 85°C, VCM = 0V unless otherwise noted. (Note 9) SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS (Note 4) VSUPPLY ±15V ±5V ±2.5V ● ● ● MIN Input VOS Drift (Note 7) TYP MAX 2.0 2.0 2.2 UNITS mV mV mV ±2.5V to ±15V ● 12 µV/°C IOS Input Offset Current ±2.5V to ±15V ● 400 nA IB Input Bias Current ±2.5V to ±15V ● 1.
PAGE 6
LT1360 U W TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage and Temperature 0.6 V+ 6 TA = 25°C ∆VOS < 1mV – 0.5 125°C 4 25°C 3 –55°C 2 –1.5 –2.0 2.0 1.5 1.0 V– 5 10 15 SUPPLY VOLTAGE (±V) 0 20 5 10 15 SUPPLY VOLTAGE (±V) 0.5 0.4 0.3 0.2 0.1 VS = ±15V TA = 25°C AV = 101 RS = 100k in 10 en 1 1 –25 0 25 50 75 TEMPERATURE (°C) 100 10 125 100 10 76 75 74 Output Voltage Swing vs Load Current – 0.
PAGE 7
LT1360 U W TYPICAL PERFORMANCE CHARACTERISTICS Output Short-Circuit Current vs Temperature Gain and Phase vs Frequency 70 100 VS = ±5V 65 120 PHASE 60 55 SOURCE 50 SINK 45 10 50 AV = 1 1 VS = ±15V TA = 25°C 35 –50 –25 0 25 50 75 TEMPERATURE (°C) 100 0.01 10k 125 40 60 VS = ±5V 30 100k 1M 10M FREQUENCY (Hz) 20 20 0 TA = 25°C AV = –1 RF = RG = 1k 0 –10 10k 100M 40 VS = ±5V 10 0.
PAGE 8
LT1360 U W TYPICAL PERFORMANCE CHARACTERISTICS Frequency Response vs Capacitive Load 12 C = 500pF 6 C = 100pF 4 C = 50pF 2 0 C=0 –2 –4 –6 –8 1M 10M FREQUENCY (Hz) – PSRR 80 60 40 20 0 100 100M VS = ±15V TA = 25°C +PSRR 10k 100k 1M FREQUENCY (Hz) 10M SLEW RATE (V/µs) 600 400 1600 700 VS = ±15V 600 500 VS = ± 5V 400 0 0 25 50 75 TEMPERATURE (°C) 100 1000 800 600 0 125 2 4 6 8 10 12 14 16 18 INPUT LEVEL (VP-P) Undistorted Output Swing vs Frequency (±5V) Undistorted Output
PAGE 9
LT1360 U W TYPICAL PERFORMANCE CHARACTERISTICS –40 0.50 VS = ±15V VO = 2VP-P RL = 500Ω AV = 2 0.25 3RD HARMONIC DIFFERENTIAL GAIN –50 DIFFERENTIAL PHASE (DEG) HARMONIC DISTORTION (dB) –30 –60 –70 2ND HARMONIC –80 –90 100k 200k 400k 1M 2M FREQUENCY (Hz) 4M 10M 0 0.40 0.36 DIFFERENTIAL PHASE 0.32 0.28 ±5 ±10 SUPPLY VOLTAGE (V) 50 ±15 0 10p 100p 1000p 0.01µ 0.
PAGE 10
LT1360 U U W U APPLICATIONS INFORMATION The LT1360 may be inserted directly into AD817, AD847, EL2020, EL2044, and LM6361 applications improving both DC and AC performance, provided that the nulling circuitry is removed. The suggested nulling circuit for the LT1360 is shown below. Offset Nulling V+ 3 7 + 6 LT1360 2 4 – 8 1 10k V– 1360 AI01 Capacitive Loading The LT1360 is stable with any capacitive load.
PAGE 11
LT1360 U W U U APPLICATIONS INFORMATION Input Considerations Power Dissipation Each of the LT1360 inputs is the base of an NPN and a PNP transistor whose base currents are of opposite polarity and provide first-order bias current cancellation. Because of variation in the matching of NPN and PNP beta, the polarity of the input bias current can be positive or negative. The offset current does not depend on NPN/PNP beta matching and is well controlled.
PAGE 12
LT1360 U W U U APPLICATIONS INFORMATION Circuit Operation The LT1360 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 which drive a 500Ω resistor. The input voltage appears across the resistor generating currents which are mirrored into the high impedance node.
PAGE 13
LT1360 W W SI PLIFIED SCHE ATIC V+ R1 500Ω +IN RC OUT –IN C V– CC 1360 SS01 13
PAGE 14
LT1360 U PACKAGE DESCRIPTION Dimension in inches (millimeters) unless otherwise noted. N8 Package 8-Lead PDIP (Narrow 0.300) (LTC DWG # 05-08-1510) 0.400* (10.160) MAX 8 7 6 5 1 2 3 4 0.255 ± 0.015* (6.477 ± 0.381) 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) ( +0.035 0.325 –0.015 8.255 +0.889 –0.381 ) 0.045 – 0.065 (1.143 – 1.651) 0.065 (1.651) TYP 0.100 (2.54) BSC *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.
PAGE 15
LT1360 U PACKAGE DESCRIPTION Dimension in inches (millimeters) unless otherwise noted. S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.189 – 0.197* (4.801 – 5.004) 8 7 6 5 0.150 – 0.157** (3.810 – 3.988) 0.228 – 0.244 (5.791 – 6.197) 1 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 0.016 – 0.050 (0.406 – 1.270) 0.014 – 0.019 (0.355 – 0.483) TYP *DIMENSION DOES NOT INCLUDE MOLD FLASH.
PAGE 16
LT1360 U TYPICAL APPLICATIONS Photodiode Preamp with AC Coupling Loop 1pF 1N5712 1N5712 10k VS = ±5V f–3dB = 100KHz, 5.5MHz iPD – VOUT LT1360 SFH205 + 10k 2k 2k 300pF 1µF 10k –5V – 5.1k – 1/2 LT1358 + 1/2 LT1358 + 1360 TA03 1MHz, 4th Order Butterworth Filter 909Ω 1.1k 47pF 22pF 909Ω 2.67k VIN – 1.1k 2.
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