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Linear Technology Electronic Components Datasheet

LT1028 Datasheet

Ultralow Noise Precision High Speed Op Amps

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FEATURES
n Voltage Noise
1.1nV/√Hz Max at 1kHz
0.85nV/√Hz Typ at 1kHz
1.0nV/√Hz Typ at 10Hz
35nVP-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
VS+ 4.32k
0.1µF
PHOTO
DIODE
SFH213
VS–
D JFET
NXP
S BF862
4.99k
VS–
1M
0.5pF
LT1028
+
VS = ±15V
VOUT = ~0.4V + IPD • 1M
1028 TA01
Voltage Noise vs Frequency
10
MAXIMUM
VS = 15V
TA = 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
1028fd
1


Linear Technology Electronic Components Datasheet

LT1028 Datasheet

Ultralow Noise Precision High Speed Op Amps

No Preview Available !

LT1028/LT1128
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage
–55°C to 105°C................................................... ±22V
105°C to 125°C................................................... ±16V
Differential Input Current (Note 9)........................±25mA
Input Voltage...............................Equal to Supply Voltage
Output Short-Circuit Duration........................... Indefinite
Operating Temperature Range
LT1028/LT1128AM, M (OBSOLETE).... –55°C to 125°C
LT1028/LT1128AC, C (Note 11).............–40°C to 85°C
Storage Temperature Range
All Devices.......................................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................... 300°C
PIN CONFIGURATION
TOP VIEW
VOS TRIM
VOS TRIM 1 8 7 V+
–IN 2
+
6 OUT
+IN 3
5 OVER-
4 COMP
V
(CASE)
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 175°C, θJA = 140°C/W, θJC = 40°C/W
OBSOLETE PACKAGE
TOP VIEW
VOS
TRIM
1
–IN 2
8
VOS
TRIM
7 V+
+IN 3
V4
+
6 OUT
5
OVER-
COMP
N8 PACKAGE
8-LEAD PLASTIC DIP
TJMAX = 150°C, θJA = 150°C/W
J8 PACKAGE
8-LEAD CERAMIC DIP
TJMAX = 175°C, θJA = 140°C/W, θJC = 40°C/W
OBSOLETE PACKAGE
VOS
TRIM
1
–IN 2
TOP VIEW
8
VOS
TRIM
7 V+
+IN 3
V4
+
6 OUT
5
OVER-
COMP
S8 PACKAGE
8-LEAD PLASTIC SOIC
TJMAX = 150°C, θJA = 140°C/W
TOP VIEW
NC 1
NC 2
TRIM 3
–IN 4
+IN 5
V6
NC 7
NC 8
+
16 NC
15 NC
14 TRIM
13 V+
12 OUT
11
OVER-
COMP
10 NC
9 NC
SW PACKAGE
16-LEAD PLASTIC SOL
TJMAX = 150°C, θJA = 130°C/W
NOTE: THIS DEVICE IS NOT RECOMMENDED FOR NEW DESIGNS
1028fd
2 For more information www.linear.com/LT1028


Part Number LT1028
Description Ultralow Noise Precision High Speed Op Amps
Maker Linear Technology
Total Page 28 Pages
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