LT1028_15 Datasheet, PDF (1/28 Pages) Linear Technology – Ultralow Noise Precision High Speed Op Amps

Features
n _{Voltage Noise}
1.1nV/√Hz Max at 1kHz
0.85nV/√Hz Typ at 1kHz
1.0nV/√Hz Typ at 10Hz
35nV_P-P Typ, 0.1Hz to 10Hz
n _{Voltage and Current Noise 100% Tested}
n _{Gain-Bandwidth Product}
LT1028: 50MHz Min
LT1128: 13MHz Min
n _{Slew Rate}
LT1028: 11V/µs Min
LT1128: 5V/µs Min
n _{Offset Voltage: 40µV Max}
n _{Drift with Temperature: 0.8µV/°C Max}
n _{Voltage Gain: 7 Million Min}
n _{Available in 8-Lead SO Package}
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}
LT1028/LT1128
Ultralow Noise Precision
High Speed Op Amps
Description
The LT^®1028(gain of –1 stable)/LT1128(gain of +1 stable)
achieve a new standard of excellence in noise performance
with 0.85nV/√Hz 1kHz noise, 1.0nV/√Hz 10Hz noise. This
ultralow noise is combined with excellent high speed
specifications (gain-bandwidth product is 75MHz for
LT1028, 20MHz for LT1128), distortion-free output, and
true precision parameters (0.1µV/°C drift, 10µV offset
voltage, 30 million voltage gain). Although the LT1028/
LT1128 input stage operates at nearly 1mA of collector
current to achieve low voltage noise, input bias current
is only 25nA.
The LT1028/LT1128’s voltage noise is less than the noise
of a 50Ω resistor. Therefore, even in very low source
impedance transducer or audio amplifier applications,
the LT1028/LT1128’s contribution to total system noise
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.
Typical Application
Ultralow Noise 1M TIA Photodiode Amplifier
V_S+ ^4.32k
0.1µF
PHOTO
DIODE
SFH213
V_S–
D _JFET
NXP
S ^BF862
4.99k
V_S–
1M
0.5pF
–
LT1028
+
V_S = ±15V
V_OUT = ~0.4V + I_PD • 1M
1028 TA01
Voltage Noise vs Frequency
10
MAXIMUM
V_S = 15V
T_A = 25°C
1/f CORNER = 14Hz
TYPICAL
1
1/f CORNER = 3.5Hz
0.1
0.1
1
10
100
FREQUENCY (Hz)
1k
1028 TA02
For more information www.linear.com/LT1028
1028fc
1