Datasheet LT1028, LT1128 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Ultra Low Noise Precision High Speed Op Amps |
| Pages / Page | 28 / 1 — FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Ultralow Noise … |
| File Format / Size | PDF / 730 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Ultralow Noise 1M TIA Photodiode Amplifier. Voltage Noise vs Frequency
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LT1028/LT1128 Ultralow Noise Precision High Speed Op Amps
FEATURES DESCRIPTION
n Voltage Noise The LT®1028(gain of –1 stable)/LT1128(gain of +1 stable) 1.1nV/√Hz Max at 1kHz achieve a new standard of excellence in noise performance 0.85nV/√Hz Typ at 1kHz with 0.85nV/√Hz 1kHz noise, 1.0nV/√Hz 10Hz noise. This 1.0nV/√Hz Typ at 10Hz ultralow noise is combined with excellent high speed 35nVP-P Typ, 0.1Hz to 10Hz specifications (gain-bandwidth product is 75MHz for n Voltage and Current Noise 100% Tested LT1028, 20MHz for LT1128), distortion-free output, and n Gain-Bandwidth Product true precision parameters (0.1µV/°C drift, 10µV offset LT1028: 50MHz Min voltage, 30 million voltage gain). Although the LT1028/ LT1128: 13MHz Min LT1128 input stage operates at nearly 1mA of collector n Slew Rate current to achieve low voltage noise, input bias current LT1028: 11V/µs Min is only 25nA. LT1128: 5V/µs Min The LT1028/LT1128’s voltage noise is less than the noise n Offset Voltage: 40µV Max of a 50Ω resistor. Therefore, even in very low source n Drift with Temperature: 0.8µV/°C Max impedance transducer or audio amplifier applications, n Voltage Gain: 7 Million Min the LT1028/LT1128’s contribution to total system noise n Available in 8-Lead SO Package will be negligible. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
APPLICATIONS
n Low Noise Frequency Synthesizers n High Quality Audio n Infrared Detectors n Accelerometer and Gyro Amplifiers n 350Ω Bridge Signal Conditioning n Magnetic Search Coil Amplifiers n Hydrophone Amplifiers
TYPICAL APPLICATION Ultralow Noise 1M TIA Photodiode Amplifier Voltage Noise vs Frequency
10 0.1µF VS = 15V 4.32k V + ) TA = 25°C S Hz MAXIMUM 1M 1/f CORNER = 14Hz D JFET 0.5pF TYPICAL NXP 1 BF862 PHOTO S – 1/f CORNER = 3.5Hz DIODE VOUT = ~0.4V + IPD • 1M SFH213 LT1028 1028 TA01 4.99k V – S + V VOLTAGE NOISE DENSITY (nV/√ S = ±15V V – S 0.10.1 1 10 100 1k FREQUENCY (Hz) 1028 TA02 1028fd For more information www.linear.com/LT1028 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Applications Information - Noise Applications Information Typical Applications Schematic Diagram Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n Voltage Noise The LT®1028(gain of –1 stable)/LT1128(gain of +1 stable) 1.1nV/√Hz Max at 1kHz achieve a new standard of excellence in noise performance 0.85nV/√Hz Typ at 1kHz with 0.85nV/√Hz 1kHz noise, 1.0nV/√Hz 10Hz noise. This 1.0nV/√Hz Typ at 10Hz ultralow noise is combined with excellent high speed 35nVP-P Typ, 0.1Hz to 10Hz specifications (gain-bandwidth product is 75MHz for n Voltage and Current Noise 100% Tested LT1028, 20MHz for LT1128), distortion-free output, and n Gain-Bandwidth Product true precision parameters (0.1µV/°C drift, 10µV offset LT1028: 50MHz Min voltage, 30 million voltage gain). Although the LT1028/ LT1128: 13MHz Min LT1128 input stage operates at nearly 1mA of collector n Slew Rate current to achieve low voltage noise, input bias current LT1028: 11V/µs Min is only 25nA. LT1128: 5V/µs Min The LT1028/LT1128’s voltage noise is less than the noise n Offset Voltage: 40µV Max of a 50Ω resistor. Therefore, even in very low source n Drift with Temperature: 0.8µV/°C Max impedance transducer or audio amplifier applications, n Voltage Gain: 7 Million Min the LT1028/LT1128’s contribution to total system noise n Available in 8-Lead SO Package will be negligible. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
APPLICATIONS
n Low Noise Frequency Synthesizers n High Quality Audio n Infrared Detectors n Accelerometer and Gyro Amplifiers n 350Ω Bridge Signal Conditioning n Magnetic Search Coil Amplifiers n Hydrophone Amplifiers
TYPICAL APPLICATION Ultralow Noise 1M TIA Photodiode Amplifier Voltage Noise vs Frequency
10 0.1µF VS = 15V 4.32k V + ) TA = 25°C S Hz MAXIMUM 1M 1/f CORNER = 14Hz D JFET 0.5pF TYPICAL NXP 1 BF862 PHOTO S – 1/f CORNER = 3.5Hz DIODE VOUT = ~0.4V + IPD • 1M SFH213 LT1028 1028 TA01 4.99k V – S + V VOLTAGE NOISE DENSITY (nV/√ S = ±15V V – S 0.10.1 1 10 100 1k FREQUENCY (Hz) 1028 TA02 1028fd For more information www.linear.com/LT1028 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Applications Information - Noise Applications Information Typical Applications Schematic Diagram Package Description Revision History Typical Application Related Parts
