LT1113 LINER [Linear Technology], LT1113 Datasheet

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LT1113

Manufacturer Part Number
LT1113
Description
Dual Low Noise, Precision, JFET Input Op Amps
Manufacturer
LINER [Linear Technology]
Datasheet

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
DC OUTPUT 2.5mV FOR T
OUTPUT VOLTAGE NOISE = 128nV/ Hz AT 1kHz (GAIN = 20)
C1 C
R2
200
100% Tested Low Voltage Noise: 6nV/ Hz Max
SO-8 Package Standard Pinout
Voltage Gain: 1.2 Million Min
Offset Voltage: 1.5mV Max
Offset Voltage Drift: 15 V/ C Max
Input Bias Current, Warmed Up: 450pA Max
Gain Bandwidth Product: 5.6MHz Typ
Guaranteed Specifications with 5V Supplies
Guaranteed Matching Specifications
Photocurrent Amplifiers
Hydrophone Amplifiers
High Sensitivity Piezoelectric Accelerometers
Low Voltage and Current Noise Instrumentation
Amplifier Front Ends
Two and Three Op Amp Instrumentation Amplifiers
Active Filters
HYDRO-
PHONE
100M
T
R1*
C1*
100pF TO 5000pF; R4C2 > R8C
Low Noise Hydrophone Amplifier with DC Servo
3.9k
C
R3
T
R8
100M
R7
1M
2
3
A
U
< 70 C
–5V TO –15V
+
5V TO 15V
LT1113
100k
R6
1/2
8
4
T
; *OPTIONAL
1
7
U
0.47 F
LT1113
C2
1/2
+
6
5
1M
1M
R4
R5
OUTPUT
Precision, JFET Input Op Amps
1113 TA01
DESCRIPTIO
The LT
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
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.
®
1113 achieves a new standard of excellence in noise
40
30
20
10
0
1kHz Input Noise Voltage Distribution
3.8
4.0
INPUT VOLTAGE NOISE (nV/ Hz)
OS
4.2
U
and a voltage gain of 4 million. Each
4.4
Dual Low Noise,
4.6 4.8
138 S8
276 OP AMPS TESTED
5.0 5.2 5.4 5.6
V
T
S
A
= 25 C
= 15V
1113 TA02
5.8
LT1113
1

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LT1113 Summary of contents

Page 1

... 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. ...

Page 2

... VOL (Note 1) Operating Temperature Range LT1113AC/LT1113C (Note 2) .......... – LT1113AM/LT1113M .................... – 125 C Specified Temperature Range LT1113AC/LT1113C (Note 3) .......... – LT1113AM/LT1113M .................... – 125 C Lead Temperature (Soldering, 10 sec) ................ 300 ORDER PART NUMBER OUT A LT1113AMJ8 – ...

Page 3

... LT1113 UNITS MHz UNITS V/mV V/ MHz ...

Page 4

... 15V 0V LT1113M TYP MAX MIN TYP MAX 0.8 2.7 0.9 3.3 0.8 2.8 0.9 3 0 13.0 12.6 13.0 –10.4 –10.0 –10 UNITS V/mV V/mV ...

Page 5

... Operating Temperature Range of – 125 C. Note 3: The LT1113C is guaranteed to meet specified performance from The LT1113C is designed, characterized and expected to meet specified performance from – but is not tested or QA sampled at these temperatures. For guaranteed I grade parts, consult the factory. The LT1113M is guaranteed to meet specified performance from – ...

Page 6

... LT1113 W U TYPICAL PERFOR A 0.1Hz to 10Hz Voltage Noise TIME (SEC) 1113 G01 Voltage Noise vs Chip Temperature 15V –75 –50 – 100 125 TEMPERATURE ( C) 1113 G04 Common-Mode Limit vs Temperature + V –0 –0 20V – ...

Page 7

... SUPPLY VOLTAGE (V) Slew Rate and Gain-Bandwidth Product vs Temperature 6 5 SLEW RATE 4 3 GBW –75 –50 – 10000 TEMPERATURE ( C) 1113 G17 LT1113 15V 10pF L 100 120 140 160 180 100 1113 G12 15 20 1113 G15 ...

Page 8

... LT1113 W U TYPICAL PERFOR A Distribution of Offset Voltage Drift with Temperature (J8 15V 150 OP AMPS –12 –10 –8 –6 –4 – OFFSET VOLTAGE DRIFT WITH TEMPERATURE ( V/ C) 1113 G19 THD and Noise vs Frequency for Noninverting Gain 15pF ...

Page 9

... 100 1k Figure 1. Comparison of LT1113 and LT1124 Total Output 1kHz Voltage Noise Versus Source Resistance W U This means the LT1113 will beat out any dual JFET op amp, only the lowest noise bipolar op amps have the edge (at low source resistances). As the source resistance ...

Page 10

... R F noninverting mode example, the transducer current is converted to a change in voltage by the transducer capaci- tance; this voltage is then buffered by the LT1113 with a gain R1/R2 path is provided by R either the transducer impedance or an external resistor. Since R is usually several orders of magnitude greater ...

Page 11

... Referring to the photographs shown in Figure 3, the LT1113 is shown operating in the follower mode ( supplies with the input swinging 5.2V. The output of the LT1113 clips cleanly and recovers with no phase reversal, unlike the competition as shown by the last photograph. This has the benefit of preventing lock-up in servo systems and minimizing distortion components ...

Page 12

... IC2 + C L The low noise performance of the LT1113 was achieved by making the input JFET differential pair large to maximize the first stage gain. Increasing the JFET geometry also increases the parasitic gate capacitance, which if left unchecked, can result in increased overshoot and ringing. ...

Page 13

... An 7 1/2 LT1113 6 – ASSUME VOLTAGE NOISE OF LT1113 AND 51 SOURCE RESISTOR = 4.6nV GAIN WITH n LT1113s IN PARALLEL = n • 200 –15V 3. OUTPUT NOISE = n • 200 • 4.6nV INPUT REFERRED NOISE = 5. NOISE CURRENT AT INPUT INCREASES n TIMES GAIN = 1000, BANDWIDTH = 1MHz, RMS NOISE 1MHz = LT1113 R4C2 = R5C3 > ...

Page 14

... WATT FOR 633nm WAVE LENGTH R2 237k C1 33nF 15V R3 249k 2 8 – 154k 249k 1 1/2 LT1113 C2 3 100nF + C4 4 330nF –15V = –121dB AT f > 330Hz OUT = – 6dB 16.3Hz OUTPUT C2 0.022 F R2 100k 6 – 1113 • TA05 R5 154k C3 10nF 6 – 7 1/2 LT1113 V OUT 5 + 1113 • TA06 ...

Page 15

... Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.053 – 0.069 (1.346 – 1.752) 0.004 – 0.010 (0.101 – 0.254) 0.014 – 0.019 0.050 (1.270) (0.355 – 0.483) BSC TYP LT1113 0.405 (10.287) 0.005 MAX (0.127) MIN 0.025 0.220 – ...

Page 16

... C L COMMENTS V NOISE V NOISE 10pA Amp I = 2pA Max, 10000pF C-Load 2pA Max, 10000pF C-Load Single LT1113 Single LT1169 – < 3mV. OUT 1113 • TA07 1113 • TA08 = 1.1nV/ Hz Max = 4.2nV/ Hz Max 200 A S 1113fa LT/TP 0100 2K REV A • PRINTED IN USA ...

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