Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsLinear ICsLinear IC - Op-amp Voltage feedback SO 8

LT1361/LT1362

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50MHz Gain Bandwidth

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800V/µs Slew Rate

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5mA 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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9nV/√Hz Input Noise Voltage

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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

Dual and Quad

50MHz, 800V/µs Op Amps

The LT1361/LT1362 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 ±13V with ±15V supplies and a 150Ω load to

±3.2V on ±5V supplies. The amplifiers are stable with any

capacitive load making them useful in buffer or cable

driving applications.

The LT1361/LT1362 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 LT1361/LT1362 see the LT1360 data sheet.

For higher bandwidth devices with higher supply currents

see the LT1363 through LT1365 data sheets. For lower

supply current amplifiers see the LT1354 to LT1359 data

sheets. 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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Video and RF Amplification

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Cable Drivers

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Data Acquisition Systems

Cable Driver Frequency Response

1361/1362 TA02

= –1 Large-Signal Response

C-Load is a trademark of Linear Technology Corporation

FREQUENCY (MHz)

–8

–6

–4

–2

GAIN (dB)

100

1361/1362 TA01

= ±10V

= ±5V

= ±2.5V

= ±15V

–

1/2

LT1361

510Ω

75Ω

OUT

75Ω

510Ω

APPLICATIO S

FEATURES

TYPICAL APPLICATIO

DESCRIPTIO

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

Summary of content (12 pages)

PAGE 1
LT1361/LT1362 Dual and Quad 50MHz, 800V/µs Op Amps U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 50MHz Gain Bandwidth 800V/µs Slew Rate 5mA Maximum Supply Current per Amplifier Unity-Gain Stable C-LoadTM Op Amp Drives All Capacitive Loads 9nV/√Hz Input Noise Voltage 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.
PAGE 2
LT1361/LT1362 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
LT1361/LT1362 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 3.4 1.1 Input Voltage Range – ±15V ±5V ±2.5V Input Voltage Range CONDITIONS CMRR Common Mode Rejection Ratio VCM = ±12V VCM = ±2.5V VCM = ±0.5V PSRR Power Supply Rejection Ratio VS = ±2.5V to ±15V AVOL Large-Signal Voltage Gain VOUT = ±12V, RL = 1k VOUT = ±10V, RL = 500Ω VOUT = ±2.5V, RL = 500Ω VOUT = ±2.
PAGE 4
LT1361/LT1362 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
LT1361/LT1362 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 PARAMETER CONDITIONS VSUPPLY 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 ● ● ● ● ● 13.4 12.0 3.4 3.0 1.2 ±V ±V ±V ±V ±V IOUT Output Current VOUT = ±12.0V VOUT = ±3.
PAGE 6
LT1361/LT1362 U W TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Temperature 0.4 0.3 0.2 0.1 0 –50 en in 10 1 1 –25 0 25 50 75 TEMPERATURE (°C) 100 10 125 100 10 77 76 75 74 Output Voltage Swing vs Load Current –2 RL = 500Ω –3 3 RL = 500Ω 2 0 25 50 75 TEMPERATURE (°C) 100 RL = 1k 0 125 5 10 15 SUPPLY VOLTAGE (±V) 20 Output Short-Circuit Current vs Temperature 6 SINK 45 1.0 85°C 0.
PAGE 7
LT1361/LT1362 U W TYPICAL PERFORMANCE CHARACTERISTICS Output Impedance vs Frequency Gain and Phase vs Frequency AV = 1 1 40 VS = ±5V 40 VS = ±5V 20 20 10 1M 10M FREQUENCY (Hz) 100M –10 10k 100k 1M 10M FREQUENCY (Hz) 45 4 40 3 30 60 25 GAIN BANDWIDTH VS = ±15V 20 15 GAIN BANDWIDTH VS = ±5V 30 –50 –25 0 25 50 75 TEMPERATURE (°C) 100 12 ±15V 1 0 –1 10 –3 5 –4 ±5V 1M 10M FREQUENCY (Hz) 50 42 40 38 36 40 34 GAIN BANDWIDTH 32 30 30 0 5 10 15 SUPPLY VOLTAGE (±V) 20 PO
PAGE 8
LT1361/LT1362 U W TYPICAL PERFORMANCE CHARACTERISTICS Slew Rate vs Temperature Slew Rate vs Supply Voltage TA = 25°C AV = –1 RF = RG = 1k SR+ + SR – SR = ————— 2 800 1200 1000 800 600 700 VS = ±15V 600 500 0 0 5 10 SUPPLY VOLTAGE (±V) 15 400 0 –25 0 25 50 75 TEMPERATURE (°C) 100 0 125 1k 10k FREQUENCY (Hz) AV = 1 15 10 VS = ±15V RL = 1k AV = 1, 1% MAX DISTORTION AV = –1, 2% MAX DISTORTION 0 100k 100k OUTPUT VOLTAGE (VP-P) OUTPUT VOLTAGE (VP-P) 0.
PAGE 9
LT1361/LT1362 U W TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Transient (AV = 1) Small-Signal Transient (AV = –1) 1361/1362 TA31 Small-Signal Transient (AV = –1, CL = 500pF) 1361/1362 TA33 1361/1362 TA32 Large-Signal Transient (AV = 1) Large-Signal Transient (AV = –1) 1361/1362 TA34 Large-Signal Transient (AV = 1, CL = 10,000pF) 1361/1362 TA35 1361/1362 TA36 U W U U APPLICATIONS INFORMATION Layout and Passive Components Input Considerations The LT1361/LT1362 amplifiers are easy to us
PAGE 10
LT1361/LT1362 U W U U APPLICATIONS INFORMATION tion with large, sustained differential inputs. Under normal, closed-loop operation, an increase of power dissipation is only noticeable in applications with large slewing outputs and 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.
PAGE 11
LT1361/LT1362 W W SI PLIFIED SCHE ATIC V+ R1 500Ω +IN CC RC OUT –IN C V– 1361/1362 SS01 U PACKAGE DESCRIPTION Dimension in inches (millimeters) unless otherwise noted. N8 Package 8-Lead PDIP (Narrow 0.300) (LTC DWG # 05-08-1510) 0.300 – 0.325 (7.620 – 8.255) 0.045 – 0.065 (1.143 – 1.651) ( +0.035 0.325 –0.015 +0.889 8.255 –0.381 0.130 ± 0.005 (3.302 ± 0.127) 0.065 (1.651) TYP 0.009 – 0.015 (0.229 – 0.381) ) 0.400* (10.160) MAX 8 7 6 5 1 2 3 4 0.255 ± 0.015* (6.477 ± 0.381) 0.
PAGE 12
LT1361/LT1362 U TYPICAL APPLICATIONS Two Op Amp Instrumentation Amplifier R5 220Ω R1 10k 1MHz, 4th Order Butterworth Filter R4 10k 909Ω R2 1k 22pF 909Ω R3 1k – 1/2 LT1361 2.67k VIN – 220pF 1/2 LT1361 + – 1.1k 47pF – 1.1k 1/2 LT1361 2.