LT1113 Datasheet, PDF (1/16 Pages) Linear Technology – Dual Low Noise, Precision, JFET Input Op Amps

LT1113
Dual Low Noise,
Precision, JFET Input Op Amps
FEATURES
s _{100% Tested Low Voltage Noise: 6nV/√Hz Max}
s _{SO-8 Package Standard Pinout}
s _{Voltage Gain: 1.2 Million Min}
s _{Offset Voltage: 1.5mV Max}
s _{Offset Voltage Drift: 15µV/°C Max}
s _{Input Bias Current, Warmed Up: 450pA Max}
s _{Gain Bandwidth Product: 5.6MHz Typ}
s _{Guaranteed Specifications with ±5V Supplies}
s _{Guaranteed Matching Specifications}
U
APPLICATIO S
s _{Photocurrent Amplifiers}
s _{Hydrophone Amplifiers}
s _{High Sensitivity Piezoelectric Accelerometers}
s _{Low Voltage and Current Noise Instrumentation}
Amplifier Front Ends
s _{Two and Three Op Amp Instrumentation Amplifiers}
s _{Active Filters}
DESCRIPTIO
The LT^®1113 achieves a new standard of excellence in noise
performance for a dual JFET op amp. The 4.5nV/√Hz 1kHz
noise combined with low current noise and picoampere
bias currents makes the LT1113 an ideal choice for ampli-
fying low level signals from high impedance capacitive
transducers.
The LT1113 is unconditionally stable for gains of 1 or more,
even with load capacitances up to 1000pF. Other key fea-
tures are 0.4mV V_OS and a voltage gain of 4 million. Each
individual amplifier is 100% tested for voltage noise, slew
rate and gain bandwidth.
The design of the LT1113 has been optimized to achieve
true precision performance with an industry standard
pinout in the S0-8 package. A set of specifications are
provided for ±5V supplies and a full set of matching speci-
fications are provided to facilitate the use of the LT1113 in
matching dependent applications such as instrumenta-
tion amplifier front ends.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Low Noise Hydrophone Amplifier with DC Servo
R1*
100M
R3
3.9k
5V TO 15V
2– 8
1/2
1
R2 ^C1*
200Ω
3 +^LT1113
4
C2
0.47µF
–5V TO –15V
R4
HYDRO-
C_T
R8
100M
R6
100k
PHONE
R7
6 ^1M
7
1/2
R5
LT1113 ₅
1M
1M
DC OUTPUT ≤ 2.5mV FOR T_A < 70°C
OUTPUT VOLTAGE NOISE = 128nV/√Hz AT 1kHz (GAIN = 20)
C1 ≈ C_T ≈ 100pF TO 5000pF; R4C2 > R8C_T; *OPTIONAL
OUTPUT
1113 TA01
1kHz Input Noise Voltage Distribution
40
V_S = ±15V
T_A = 25°C
138 S8
30
276 OP AMPS TESTED
20
10
0
3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6 5.8
INPUT VOLTAGE NOISE (nV/√Hz)
1113 TA02
1