LF157ID [STMICROELECTRONICS]
OP-AMP, 7000uV OFFSET-MAX, 20MHz BAND WIDTH, PDSO8, MICRO, PLASTIC, SOP-8;型号: | LF157ID |
厂家: | ST |
描述: | OP-AMP, 7000uV OFFSET-MAX, 20MHz BAND WIDTH, PDSO8, MICRO, PLASTIC, SOP-8 放大器 光电二极管 |
文件: | 总14页 (文件大小:250K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LF155-LF255-LF355
LF156-LF256-LF356
LF157-LF257-LF357
WIDE BANDWIDTH
SINGLE J-FET OPERATIONAL AMPLIFIERS
.
.
.
HIGH INPUT IMPEDANCE J-FET INPUT
STAGE
HIGH SPEED J-FET OP-AMPs : up to 20MHz,
50V/µs
OFFSETVOLTAGEADJUSTMENTDOESNOT
DEGRADE DRIFT OR COMMON-MODE
REJECTION AS IN MOST OF MONOLITHIC
AMPLIFIERS
.
INTERNAL COMPENSATION AND LARGE
N
DIP8
(Plastic Package)
D
SO8
DIFFERENTIALINPUTVOLTAGECAPABILITY
+
(UP TO VCC
)
(Plastic Micropackage)
TYPICAL APPLICATIONS
.
.
.
.
PRECISION HIGH SPEED INTEGRATORS
FAST D/A AND CONVERTERS
HIGH IMPEDANCE BUFFERS
WIDEBAND, LOW NOISE, LOW DRIFT
AMPLIFIERS
LOGARITHIMIC AMPLIFIERS
PHOTOCELL AMPLIFIERS
SAMPLE AND HOLD CIRCUITS
ORDER CODES
Package
Temperature
Range
Part Number
N
•
D
•
LF355, LF356, LF357
LF255, LF256, LF257
LF155, LF156, LF157
Example : LF355N
0oC, +70oC
–40oC, +105oC
–55oC, +125oC
.
.
.
•
•
•
•
PIN CONNECTIONS (top view)
1
2
3
4
8
DESCRIPTION
7
6
5
These circuits are monolithic J-FET input operational
amplifiers incorporating well matched, high voltage
J-FET on the same chip with standardbipolar transis-
tors.
This amplifiers feature low input bias and offset cur-
rents, low input offset voltage and input offset voltage
drift,coupledwith offsetadjustwhichdoesnotdegrade
driftor common-mode rejection.
5 - Offset Null 2
6 - Output
7 - VCC
1 - Offset Null 1
2 - Inverting input
3 - Non-inverting input
The devicesarealso designedforhigh slew rate, wide
bandwidth,extremelyfastsettlingtime,lowvoltageand
current noise and a low 1/f noise level.
+
-
8 - N.C.
4 - VCC
July 1998
1/14
LF155 - LF156 - LF157
SCHEMATIC DIAGRAM
Vio ADJUSTMENT
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
±22
Unit
V
VCC
Vi
Supply Voltage
Input Voltage - (note 1)
Differential Input Voltage
Power Dissipation
±20
V
Vid
Ptot
±40
V
570
mW
Output Short-circuit Duration
Infinite
Toper
Operating Free Air Temperature Range
LF155-LF156-LF157
LF255-LF256-LF257
LF355-LF356-LF357
-55 to +125
–40 to +105
0 to 70
oC
oC
Tstg
Storage Temperature Range
–65 to 150
2/14
LF155 - LF156 - LF157
ELECTRICAL CHARACTERISTICS
LF155, LF156, LF157
LF255, LF256, LF257
(unless otherwise specified)
-55oC ≤ Tamb ≤ +125oC
±5V ≤ VCC ≤ ±20V
±5V ≤ VCC ≤ ±20V
-40oC ≤ Tamb ≤ +105oC
LF155 - LF156 - LF157
LF255 - LF256 - LF257
Symbol
Parameter
Unit
Min.
Typ.
Max.
Vio
Input Offset Voltage (RS = 50Ω)
mV
Tamb = 25oC
3
5
7
6.2
Tmin. ≤ Tamb ≤ Tmax.
LF155, LF156, LF157
LF255, LF256, LF257
Iio
Input Offset Current - (note 3)
Tamb = 25oC
3
20
20
1
pA
nA
nA
Tmin. ≤ Tamb ≤ Tmax.
LF155, LF156, LF157
LF255, LF256, LF257
Iib
Input Bias Current - (note 3)
Tamb = 25oC
20
100
50
5
pA
nA
nA
Tmin. ≤ Tamb ≤ Tmax.
LF155, LF156, LF157
LF255, LF256, LF257
Avd
Large Signal Voltage Gain (RL = 2kΩ, VO = ±10V, VCC = ±15V)
V/mV
Tamb = 25oC
50
25
200
100
Tmin. ≤ Tamb ≤ Tmax.
SVR
ICC
Supply Voltage Rejection Ratio - (note 4)
85
dB
Supply Current (VCC = ±15V, no load)
mA
Tamb = 25oC
LF155, LF255
LF156, LF256
LF157, LF257
2
5
5
4
7
7
DVio
Input Offset Voltage Drift (RS = 50Ω)
5
µV/oC
µV/oC
DVio/Vio Change in Average Temperature Coefficient with Vio adjust
0.5
(RS = 50Ω) - (note 2)
Input Common Mode Voltage Range (VCC = ±15V, Tamb = 25oC)
Vicm
±11
+15.1
-12
V
CMR
Common Mode Rejection Ratio
85
100
dB
V
±VOPP
Output Voltage Swing (VCC = ±15V)
RL = 10kΩ
RL = 2kΩ
±12
±10
±13
±12
GBP
SR
Gain Bandwidth Product (VCC = ±15V, Tamb = 25oC)
MHz
LF155, LF255
LF156, LF256
LF157, LF257
2.5
5
20
Slew Rate (VCC = ±15V, Tamb = 25oC)
V/µs
AV = 1
LF155, LF255
LF156, LF256
LF157, LF257
5
12
50
1012
3
7.5
30
AV = 5
Ri
Ci
en
Input Resistance (Tamb = 25oC)
Ω
Input Capacitance (VCC = ±15V, Tamb = 25oC)
pF
Equivalent Input Noise Voltage
nV
√Hz
(VCC = ±15V, Tamb = 25oC, RS = 100Ω)
f = 1000Hz
LF155, LF255
20
12
12
25
15
15
LF156, LF256
LF157, LF257
LF155, LF255
LF156, LF256
LF157, LF257
f = 100Hz
in
ts
Equivalent Input Noise Current
pA
√Hz
µs
(VCC = ±15V, Tamb = 25oC, f = 100Hz or f = 1000Hz)
Settling Time (VCC = ±15V, Tamb = 25oC) - (note 5)
0.01
LF155, LF255
4
LF156, LF256
LF157, LF257
1.5
1.5
3/14
LF155 - LF156 - LF157
ELECTRICAL CHARACTERISTICS
LF355, LF356, LF357
0oC ≤ Tamb ≤ +70oC
VCC = ±15V, (unless otherwise specified)
LF355 - LF356 - LF357
Symbol
Parameter
Unit
Min.
Typ.
Max.
Vio
Input Offset Voltage (RS = 50Ω)
mV
Tamb = 25oC
3
10
13
Tmin. ≤ Tamb ≤ Tmax.
Iio
Input Offset Current - (note 3)
Tamb = 25oC
3
50
2
pA
nA
Tmin. ≤ Tamb ≤ Tmax.
Iib
Input Bias Current - (note 3)
Tamb = 25oC
20
200
8
pA
nA
Tmin. ≤ Tamb ≤ Tmax.
Avd
Large Signal Voltage Gain (RL = 2kΩ, VO = ±10V)
V/mV
Tamb = 25oC
25
15
200
100
Tmin. ≤ Tamb ≤ Tmax.
SVR
ICC
Supply Voltage Rejection Ratio - (note 4)
Supply Current (no load)
80
dB
mA
Tamb = 25oC
LF355
2
5
4
10
LF356, LF357
DVio
Input Offset Voltage Drift (RS = 50Ω) - (note 2)
5
µV/oC
DVio/Vio Change in Average Temperature Coefficient with Vio adjust
0.5
µV/oC
(RS = 50Ω)
per mV
Vicm
Input Common Mode Voltage Range (Tamb = 25oC)
±10
+15.1
-12
V
CMR
Common Mode Rejection Ratio
80
100
dB
V
±VOPP
Output Voltage Swing
RL = 10kΩ
±12
±10
±13
±12
RL = 2kΩ
GBP
SR
Gain Bandwidth Product Tamb = 25oC)
LF355
LF356
LF357
2.5
5
20
MHz
Slew Rate (Tamb = 25oC)
AV = 1
V/µs
LF355
LF356
LF357
5
12
50
1012
3
AV = 5
Ri
Ci
en
Input Resistance (Tamb = 25oC)
Input Capacitance (Tamb = 25oC)
Ω
pF
Equivalent Input Noise Voltage (Tamb = 25oC, RS = 100Ω)
nV
√Hz
f = 1000Hz
LF355
20
12
25
15
LF356, LF357
LF355
f = 100Hz
LF356, LF357
in
ts
Equivalent Input Noise Current
pA
√Hz
µs
(Tamb = 25oC, f = 100Hz or f = 1000Hz)
0.01
Settling Time (Tamb = 25oC) - (note 5)
LF355
LF356, LF357
4
1.5
Notes : 1. Unless otherwise specified the absolute maximum negative input voltage is equal to the negative power supply voltage.
2. The temperature coefficient of the adjusted input offset voltage changes only a small amount (0.5µV/oC typically) for each mV
of adjustment from its original unadjusted value. Common-mode rejection and open loop voltage gain are alsounaffected by
offset adjustment.
3. The input bias currents are junction leakage currents which approximately double for every 10oC increase in the junction
temperature Tamb. Due to limited production test time, the input bias current measured is correlated to junction temperature.
In a normal operation the junction temperature rises above the ambient temperature as a result of internal power dissipation,
Ptot-Tamb =Tamb +Rth(j-a)xPtot where Rth(j-a)is the thermal resistance from junction to ambient. Use of a heatsink is recommended
f input currents are to be kept to a minimum.
4. Supply voltage rejection is measured for both supply magnitudes increasing or decreasing simultaneously, in accordance with
common practise.
5. Settling time is defined here, for a unity gain inverter connection using 2kΩ resistors for the LF155, LF156 series. It is the time
required for the error voltage (the voltage at the inverting input pin on the amplifier) to settle to within 0.01% of its final value from
the time a 10V step input is applied to the inverter. For the LF157 series AV = -5, the feedback resistor from output to inputis 2kΩ
and the output step is 10V.
4/14
LF155 - LF156 - LF157
APPLICATION HINTS
in a socket as an unilimited current surge throughthe
resultingforward diode within the IC couldcausefusin-
goftheinternalconductorsandresultina destroyedunit.
Because these amplifiers are JFET rather than MOS-
FET input op amps they do not require special han-
dling.
AllofthebiascurrentsintheseamplifiersaresetbyFET
current sources. The drain currents for the amplifiers
are therefore essentially independent of supply volt-
ages.
Aswith most amplifiers, care should betakenwith lead
dress, componentsplacement and supply decoupling
in orderto ensure stability. Forexample, resistorsfrom
the output to an input should be placedwith the body
close to theinputto minimiz ”pickup”andmaximize the
frequencyof the feedbackpole by minimizing the ca-
pacitancefromthe input to ground.
A feedbackpole is createdwhen the feedbackaround
any amplifier is resistive. The parallel resistance and
capacitancefromtheinput of thedevice(usuallythe in-
vertinginput)toacgroundsetthefrequencyofthepole.In
many instances the frequency of this pole is much
greaterthanthe expected3 dBfrequencyof the closed
loopgainand consequentlythereisnegligible effect on
stability margin. However, if the feedback pole is less
than approximately six time the expected 3 dB fre-
quencyaleadcapacitorshould be placed from the out-
putto the inputof the op amp. The value of that added
capacitorshould be such that the RC time constant of
thiscapacitorand theresistance it parallels is greater
than or equal to the original feedbackpole time con-
stant.
The LF155, LF156, LF157 series areop amps with J-
FETinput transistors. TheseJFETs havelarge reverse
breakdown voltagesfromgatetosource or drain elimi-
natingtheneed of clampsacrossthe inputs.Therefore
large differential input voltagescan easily be accom-
modatedwithoutalarge increaseof inputcurrents.The
maximum differential input voltage is independent of
the supplyvoltage.However, neitherof thenegativein-
put voltagesshouldbe allowed to exceedthenegative
supply as this will cause large currents to flow which
can result in a destroyedunit. Exceeding the negative
common-modelimit oneitherinputwillcauseareversal
of thephasetotheoutputandforce the amplifier output
to the correspondinghigh or lowstate. Exceedingthe
negativecommon-mode limit on bothinputs will force
theamplifieroutputtoa highstate.Inneithercasedoes
a latch occur since raising the input back within the
common-mode range again puts the input stage and
thustheamplifierin a normaloperatingmode.Exceed-
ingthepositivecommon-modelimit onasingleinputwill
not changethephase of the output however, if bothin-
putsexceedthe limit, theoutput of theamplifier will be
forcedtoahighstate.Theseamplifierswill operatewith
the common-mode input voltageequal to the positive
supply. In fact, the common-modevoltagecanex-
ceedthepositivesupplybyapproximately100mV inde-
pendentof supply volt-age and over thefull operat-
ingtemperaturerange.The positive suplly can there-
forebeusedasa referenceonaninputas, forexample,
in asupplycurrent monitorand/orlimiter. Precautions-
shouldbe takentoensurethat thepowersupplyforthe
integratedcircuit neverbecomesre-versedin polarity
orthatthe unit isnot inadvertentlyin-stalledbackwards
5/14
LF155 - LF156 - LF157
6/14
LF155 - LF156 - LF157
7/14
LF155 - LF156 - LF157
8/14
LF155 - LF156 - LF157
9/14
LF155 - LF156 - LF157
10/14
LF155 - LF156 - LF157
11/14
LF155 - LF156 - LF157
12/14
LF155 - LF156 - LF157
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC DIP
Millimeters
Inches
Dimensions
Min.
Typ.
Max.
Min.
Typ.
Max.
A
a1
B
3.32
0.131
0.51
1.15
0.020
0.045
0.014
0.008
1.65
0.55
0.065
0.022
0.012
0.430
0.384
b
0.356
0.204
b1
D
E
0.304
10.92
9.75
7.95
0.313
e
2.54
7.62
7.62
0.100
0.300
0.300
e3
e4
F
6.6
0260
0.200
0.150
0.060
i
5.08
3.81
1.52
L
3.18
0.125
Z
13/14
LF155 - LF156 - LF157
PACKAGE MECHANICAL DATA
8 PINS - PLASTIC MICROPACKAGE (SO)
Millimeters
Dimensions
Inches
Typ.
Min.
Typ.
Max.
1.75
0.25
1.65
0.85
0.48
0.25
0.5
Min.
Max.
0.069
0.010
0.065
0.033
0.019
0.010
0.020
A
a1
a2
a3
b
0.1
0.004
0.65
0.35
0.19
0.25
0.026
0.014
0.007
0.010
b1
C
c1
D
45o (typ.)
4.8
5.8
5.0
6.2
0.189
0.228
0.197
0.244
E
e
1.27
3.81
0.050
0.150
e3
F
3.8
0.4
4.0
1.27
0.6
0.150
0.016
0.157
0.050
0.024
L
M
S
8o (max.)
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifi-
cations mentioned in this publication are subject to change without notice. This publication supersedes and replaces all infor-
mation previously supplied. STMicroelectronics products are not authorized for use as critical components in life support
devices or systems without express written approval of STMicroelectronics.
The ST logo is a trademark of STMicroelectronics
1998 STMicroelectronics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco
The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdo m- U.S.A.
14/14
相关型号:
SI9130DB
5- and 3.3-V Step-Down Synchronous ConvertersWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1-E3
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135_11
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9136_11
Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
©2020 ICPDF网 联系我们和版权申明