Datasheet

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LT1355/LT1356

Dual and Quad

12MHz, 400V/µs Op Amps

1355/1356 TA01

5.23k

10.2k

47pF

6.81k

100pF

1000pF

OUT

–

5.23k

11.3k6.81k

330pF

1/2

LT1355

1/2

LT1355

100kHz, 4th Order Butterworth Filter

1355/1356 TA02

= –1 Large-Signal Response

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12MHz Gain Bandwidth

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400V/µs Slew Rate

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1.25mA Maximum Supply Current per Amplifier

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Unity-Gain Stable

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C-Load

Op Amp Drives All Capacitive Loads

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10nV/√Hz Input Noise Voltage

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800µV Maximum Input Offset Voltage

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300nA Maximum Input Bias Current

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70nA Maximum Input Offset Current

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12V/mV Minimum DC Gain, R

=1k

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230ns Settling Time to 0.1%, 10V Step

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280ns Settling Time to 0.01%, 10V Step

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±12.5V Minimum Output Swing into 500Ω

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±3V Minimum Output Swing into 150Ω

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Specified at ±2.5V, ±5V, and ±15V

The LT1355/LT1356 are dual and quad low power high

speed operational amplifiers with outstanding AC and DC

performance. The amplifiers feature much lower supply

current and higher slew rate than devices with comparable

bandwidth. The circuit topology is a voltage feedback

amplifier with matched high impedance inputs and the

slewing performance of a current feedback amplifier. The

high slew rate and single stage design provide excellent

settling characteristics which make the circuit an ideal

choice for data acquisition systems. Each output drives a

500Ω load to ±12.5V with ±15V supplies and a 150Ω load

to ±3V on ±5V supplies. The amplifiers are stable with any

capacitive load making them useful in buffer applications.

The LT1355/LT1356 are members of a family of fast, high

performance amplifiers using this unique topology and

employing Linear Technology Corporation’s advanced

bipolar complementary processing. For a single amplifier

version of the LT1355/LT1356 see the LT1354 data sheet.

For higher bandwidth devices with higher supply currents

see the LT1357 through LT1365 data sheets. Bandwidths

of 25MHz, 50MHz, and 70MHz are available with 2mA,

4mA, and 6mA of supply current per amplifier. Singles,

duals, and quads of each amplifier are available.

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Wideband Amplifiers

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Buffers

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Active Filters

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Data Acquisition Systems

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Photodiode Amplifiers

C-Load is a trademark of Linear Technology Corporation.

APPLICATIO S

FEATURES

TYPICAL APPLICATIO

DESCRIPTIO

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

Summary of content (17 pages)

PAGE 1
LT1355/LT1356 Dual and Quad 12MHz, 400V/µs Op Amps U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 12MHz Gain Bandwidth 400V/µs Slew Rate 1.25mA Maximum Supply Current per Amplifier Unity-Gain Stable C-LoadTM Op Amp Drives All Capacitive Loads 10nV/√Hz Input Noise Voltage 800µV Maximum Input Offset Voltage 300nA Maximum Input Bias Current 70nA Maximum Input Offset Current 12V/mV Minimum DC Gain, RL=1k 230ns Settling Time to 0.1%, 10V Step 280ns Settling Time to 0.01%, 10V Step ±12.
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LT1355/LT1356 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 7) .. – 40°C to 85°C Specified Temperature Range (Note 8) ...
PAGE 3
LT1355/LT1356 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER TA = 25°C, VCM = 0V unless otherwise noted. VSUPPLY MIN TYP + ±15V ±5V ±2.5V 12.0 2.5 0.5 13.4 3.5 1.1 V V V Input Voltage Range – ±15V ±5V ±2.5V –13.2 –12.0 –3.4 –2.5 –0.9 –0.5 V V V Input Voltage Range CONDITIONS VCM = ±12V VCM = ±2.5V VCM = ±0.5V MAX UNITS ±15V ±5V ±2.5V 83 78 68 97 84 75 92 106 dB VOUT = ±12V, RL = 1k VOUT = ±10V, RL = 500Ω VOUT = ±2.5V, RL = 1k VOUT = ±2.5V, RL = 500Ω VOUT = ±2.
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LT1355/LT1356 ELECTRICAL CHARACTERISTICS 0°C ≤ TA ≤ 70°C, VCM = 0V unless otherwise noted. SYMBOL PARAMETER VOS Input Offset Voltage Input VOS Drift The ● denotes the specifications which apply over the temperature range CONDITIONS (Note 6) VSUPPLY MIN ±15V ±5V ±2.5V ● ● ● ±2.5V to ±15V ● TYP 5 MAX UNITS 1.0 1.0 1.2 mV mV mV 8 µV/°C IOS Input Offset Current ±2.5V to ±15V ● 100 nA IB Input Bias Current ±2.5V to ±15V ● 450 nA CMRR Common Mode Rejection Ratio ±15V ±5V ±2.
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LT1355/LT1356 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the temperature range – 40°C ≤ TA ≤ 85°C, VCM = 0V unless otherwise noted. (Note 8) SYMBOL PARAMETER CONDITIONS VSUPPLY VOUT = ±2.5V, RL = 150Ω VOUT = ±1V, RL = 500Ω ±5V ±2.5V ● ● MIN 0.4 1.7 TYP MAX UNITS V/mV V/mV VOUT Output Swing RL = 1k, VIN = ±40mV RL = 500Ω, VIN = ±40mV RL = 500Ω, VIN = ±40mV RL = 150Ω, VIN = ±40mV RL = 500Ω, VIN = ±40mV ±15V ±15V ± 5V ± 5V ± 2.5V ● ● ● ● ● 13.0 11.5 3.4 2.
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LT1355/LT1356 U W TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Temperature 125 100 75 50 25 0 –50 –25 0 25 50 75 TEMPERATURE (°C) 100 125 in 10 en 1 1 10 100 1355/1356 G04 RL = 1k 92 91 90 –2 RL = 500Ω –3 3 RL = 500Ω 2 1 89 RL = 1k 100 0 125 5 10 15 SUPPLY VOLTAGE (±V) Output Short-Circuit Current vs Temperature OUTPUT SWING (V) OUTPUT SHORT-CIRCUIT CURRENT (mA) SINK 40 SOURCE –25 0 25 50 75 TEMPERATURE (°C) 100 125 1355/1356 G10 6 1.
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LT1355/LT1356 U W TYPICAL PERFORMANCE CHARACTERISTICS Frequency Response vs Capacitive Load Output Impedance vs Frequency 10 AV = 10 1 AV = 1 0.
PAGE 8
LT1355/LT1356 U W TYPICAL PERFORMANCE CHARACTERISTICS Slew Rate vs Temperature Slew Rate vs Supply Voltage TA = 25°C AV = –1 RF = RG = 2k SR+ + SR– SR = ————— 2 300 200 250 AV = –2 SR+ + SR– SR = ————— 2 200 150 VS = ±5V 100 100 0 0 5 10 SUPPLY VOLTAGE (±V) 50 –50 15 0 25 50 75 TEMPERATURE (°C) 0.
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LT1355/LT1356 U W TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Transient (AV = 1) Small-Signal Transient (AV = –1) 1355/1356 G31 Small- Signal Transient (AV = –1, CL = 1000pF) 1355/1356 G33 1355/1356 G32 Large-Signal Transient (AV = 1) Large-Signal Transient (AV = –1) 1355/1356 G34 Large-Signal Transient (AV = 1, CL = 10,000pF) 1355/1356 G35 1355/1356 G36 U W U U APPLICATIONS INFORMATION Layout and Passive Components The LT1355/LT1356 amplifiers are easy to use and tolerant of less than
PAGE 10
LT1355/LT1356 U W U U APPLICATIONS INFORMATION Capacitive Loading Circuit Operation The LT1355/LT1356 are stable with any capacitive load. As the capacitive load increases, both the bandwidth and phase margin decrease so there will be peaking in the frequency domain and in the transient response. Coaxial cable can be driven 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.
PAGE 11
LT1355/LT1356 U W U U APPLICATIONS INFORMATION Power Dissipation The LT1355/LT1356 combine high speed and large output drive in small packages. Because of the wide supply voltage range, it is possible to exceed the maximum junction temperature under certain conditions.
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LT1355/LT1356 U PACKAGE DESCRIPTIO Dimensions 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.
PAGE 13
LT1355/LT1356 U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. N Package 14-Lead PDIP (Narrow 0.300) (LTC DWG # 05-08-1510) 0.770* (19.558) MAX 14 13 12 11 10 9 8 1 2 3 4 5 6 7 0.255 ± 0.015* (6.477 ± 0.381) 0.130 ± 0.005 (3.302 ± 0.127) 0.300 – 0.325 (7.620 – 8.255) 0.045 – 0.065 (1.143 – 1.651) 0.020 (0.508) MIN 0.065 (1.651) TYP 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 0.005 (0.125) MIN 0.100 (2.
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LT1355/LT1356 U PACKAGE DESCRIPTIO Dimensions 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.
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LT1355/LT1356 U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. S Package 16-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.386 – 0.394* (9.804 – 10.008) 16 15 14 13 12 11 10 9 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) 2 3 4 5 6 0.053 – 0.069 (1.346 – 1.752) 0.008 – 0.010 (0.203 – 0.254) 0.014 – 0.019 (0.355 – 0.483) TYP 8 0.004 – 0.010 (0.101 – 0.254) 0° – 8° TYP 0.016 – 0.
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LT1355/LT1356 U TYPICAL APPLICATIONS Instrumentation Amplifier R5 432Ω R1 20k R2 2k – 1/2 LT1355 R3 2k – 1/2 LT1355 + – R4 20k VOUT + VIN + R4  1  R2 R3  R2 + R3  1 +  = 104 + + R3  2  R1 R4  R5    TRIM R5 FOR GAIN TRIM R1 FOR COMMON-MODE REJECTION BW = 120kHz AV = 1355/1356 TA03 100kHz, 4th Order Butterworth Filter (Sallen-Key) C4 1000pF C2 330pF – 1/2 LT1355 – 1/2 LT1355 + VIN R1 2.87k R2 26.7k VOUT + R3 2.43k C1 100pF R4 15.
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