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PDF LT1169CN8 Data sheet ( Hoja de datos )
| Número de pieza | LT1169CN8 | |
| Descripción | Dual Low Noise/ Picoampere Bias Current/ JFET Input Op Amp | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
s Input Bias Current, Warmed Up: 20pA Max
s 100% Tested Low Voltage Noise: 8nV/√Hz Max
s S8 and N8 Package Standard Pinout
s Very Low Input Capacitance: 1.5pF
s Voltage Gain: 1.2 Million Min
s Offset Voltage: 2mV Max
s Input Resistance: 1013Ω
s Gain-Bandwidth Product: 5.3MHz Typ
s Guaranteed Specifications with ±5V Supplies
s Guaranteed Matching Specifications
APPLICATI 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
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATI
Low Noise Light Sensor with DC Servo
C1
2pF
D2
1N914
2–
1/2 LT1169
3+
1
R1
1M
C2
0.022µF
VOUT
CD
2N3904
HAMAMATSU
S1336-5BK
(908) 231-0960
R5
10k
V–
D1
1N914
R3
1k
+V
86
7
1/2 LT1169
R2
100k
5
R4
1k
R2C2 > C1R1
4
–V
CD = PARASITIC PHOTODIODE CAPACITANCE
VOUT = 100mV/µWATT FOR 200nm WAVE LENGTH
330mV/µWATT FOR 633nm WAVE LENGTH
LT1169 • TA01
LT1169
Dual Low Noise,
Picoampere Bias Current,
JFET Input Op Amp
DESCRIPTIO
The LT1169 achieves a new standard of excellence in noise
performance for a dual JFET op amp. For the first time low
voltage noise (6nV/√Hz) is simultaneously offered with
extremely low current noise (1fA/√Hz), providing the low-
est total noise for high impedance transducer applications.
Unlike most JFET op amps, the very low input bias current
(5pA Typ) is maintained over the entire common mode
range which results in an extremely high input resistance
(1013Ω). When combined with a very low input capaci-
tance (1.5pF) an extremely high input impedance results,
making the LT1169 the first choice for amplifying low level
signals from high impedance transducers. The low input
capacitance also assures high gain linearity when buffering
AC signals from high impedance transducers.
The LT1169 is unconditionally stable for gains of 1 or more,
even with 1000pF capacitive loads. Other key features are
0.6mV VOS and a voltage gain over 4 million. Each indi-
vidual amplifier is 100% tested for voltage noise, slew rate
(4.2V/µs), and gain-bandwidth product (5.3MHz).
The LT1169 is offered in the S8 and N8 packages.
A full set of matching specifications are provided for
precision instrumentation amplifier front ends. Specifica-
tions at ±5V supply operation are also provided. For an
even lower voltage noise please see the LT1113 data sheet.
1kHz Output Voltage Noise
Density vs Source Resistance
10k
–
1k +
RSOURCE
VN
100
10 VN
SOURCE
RESISTANCE
TA = 25°C
ONLY
VS = ±15V
1
100 1k 10k 100k 1M 10M 100M 1G
SOURCE RESISTANCE (Ω)
VN = √(VOP AMP)2 + 4kTRS + 2qIBRS2
LT1169 • TA02
1
1 page  
TYPICAL PERFOR A CE CHARACTERISTICS
LT1169
Voltage Noise vs Chip Temperature
10
VS = ±15V
9
8
7
6
5
4
3
2
–75 –50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
LT1169 • TPC04
Common Mode Limit
vs Temperature
V+ 0
–0.5
–1.0
V+ = 5V TO 20V
–1.5
–2.0
3.0
2.5
2.0
1.5
V– +1.0
–60
V – = – 5V TO – 20V
–20 20
60 100
TEMPERATURE (°C)
140
LT1169 • TPC07
Voltage Gain vs Frequency
180
TA = 25°C
VS = ±15V
140
100
60
20
–20
0.01
1 100 10k 1M 100M
FREQUENCY (Hz)
LT1169 • TPC10
Input Bias and Offset Currents
vs Chip Temperature
30n
10n
VS = ±15V
VCM = –10 TO 13V
3n
1n
300p
100p
BIAS
CURRENT
30p
10p OFFSET
CURRENT
3p
1p
0.3p
0
25 50 75 100
TEMPERATURE (°C)
125
LT1169 • TPC05*
Common Mode Rejection Ratio
vs Frequency
120
TA = 25°C
100 VS = ±15V
80
60
Input Bias and Offset Currents
Over the Common Mode Range
10
8
TA = 25°C
VS = ±15V
6
4
2 BIAS CURRENT
0 OFFSET CURRENT
–2
–4
–6
–8
–10
–15
–10 –5 0
5 10
COMMON MODE RANGE (V)
15
LT1169 • TPC06
Power Supply Rejection Ratio
vs Frequency
120
TA = 25°C
100
+PSRR
80
–PSRR
60
40 40
20 20
0
1k 10k 100k 1M 10M
FREQUENCY (Hz)
LT1169 • TPC08
0
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
LT1169 • TPC09
Voltage Gain vs Chip Temperature
10
9
VS = ±15V
VO = ±10V, RL = 1k
8 VO = ±12V, RL = 10k
7
6
RL =10k
5
4
3 RL = 1k
2
1
0
–75 –50 –25 0 25 50 75 100 125
CHIP TEMPERATURE (°C)
LT1169 • TPC11
Gain and Phase Shift
vs Frequency
50
TA = 25°C
VS = ±15V
40 CL = 10pF
30
60
80
100
20 120
PHASE
10
GAIN
140
0 160
–10
0.1
1 10
FREQUENCY (MHz)
180
100
LT1169 • TPC12
5
5 Page 
LT1169
TYPICAL APPLICATIONS N
Low Noise Hydrophone Amplifier with DC Servo
Accelerometer Amplifier with DC Servo
R1*
100M
R3
3.9k
R2 C1*
200Ω
5V TO 15V
2– 8
1/2
3 +LT1169
4
1
–5V TO –15V
HYDRO-
CT
R8
100M
R6
100k
PHONE
R7
1M
7
C2
0.47µF
6
1/2
LT1169 5
DC OUTPUT ≤ 2.5mV FOR TA < 70°C
OUTPUT VOLTAGE NOISE = 128nV/√Hz AT 1kHz (GAIN = 20)
C1 ≈ CT ≈ 100pF TO 5000pF; R4C2 > R8CT; *OPTIONAL
OUTPUT
R4
1M
R5
1M
LT1169 • TA05
ACCELEROMETER
B & K MODEL 4381
OR EQUIVALENT
(800) 442-1030
C1
1250pF
R1
100M
R3
2k
C2
2µF
R2
18k
R4
6 20M
7
1/2 LT1169
5
5V TO 15V
2– 8
R5
20M
C3
2µF
1/2 LT1169
3+
4
–5V TO –15V
1
R4C2 = R5C3 > R1 (1 + R2/R3) C1
OUTPUT = 0.8mV/pC* = 8.0mV/g**
DC OUTPUT ≤ 1.9mV
OUTPUT NOISE = 8nV/√Hz AT 1kHz
OUTPUT
*PICOCOULOMBS
**g = EARTH’S GRAVITATIONAL CONSTANT
LT1169 • TA07
PACKAGE DESCRIPTIO
0.300 – 0.325
(7.620 – 8.255)
Dimensions in inches (millimeters) unless otherwise noted.
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.045 – 0.065
(1.143 – 1.651)
0.130 ± 0.005
(3.302 ± 0.127)
0.400*
(10.160)
MAX
87 6
5
0.009 – 0.015
(0.229 – 0.381)
+0.035
0.325 –0.015
( )8.255
+0.889
–0.381
0.065
(1.651)
TYP
0.100 ± 0.010
(2.540 ± 0.254)
0.125
(3.175) 0.020
MIN (0.508)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
0.255 ± 0.015*
(6.477 ± 0.381)
12
34
N8 1197
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.010
(0.254
–
–
0.020
0.508)
×
45°
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0°– 8° TYP
0.016 – 0.050
0.406 – 1.270
0.014 – 0.019
(0.355 – 0.483)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
TYP
0.228 – 0.244
(5.791 – 6.197)
0.189 – 0.197*
(4.801 – 5.004)
8 765
1 2 34
0.150 – 0.157**
(3.810 – 3.988)
SO8 0996
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1169CN8.PDF ] | |
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