LT1191CS8#TRPBF [Linear]
LT1191 - Ultra High Speed Operational Amplifier; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C;型号: | LT1191CS8#TRPBF |
厂家: | Linear |
描述: | LT1191 - Ultra High Speed Operational Amplifier; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C 运算放大器 放大器电路 光电二极管 |
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LT1191
Ultrahigh Speed
Operational Amplifier
U
FEATURES
DESCRIPTIO
The LT®1191 is a video operational amplifier optimized for
operationon±5Vandasingle5Vsupply.Unlikemanyhigh
speed amplifiers, this amplifier features high open-loop
gain, over 90dB, and the ability to drive heavy loads to a
full-power bandwidth of 20MHz at 7VP-P. In addition to its
veryfastslewrate,theLT1191featuresaunity-gain-stable
bandwidth of 90MHz.
■
Gain Bandwidth Product, AV = 1: 90MHz
■
Slew Rate: 450V/µs
■
Low Cost
Output Current: ±50mA
Settling Time: 110ns to 0.1%
Differential Gain Error: 0.07%, (RL = 1k)
Differential Phase Error: 0.02°, (RL = 1k)
High Open-Loop Gain: 20V/mV Min
Single Supply 5V Operation
Output Shutdown
■
■
■
■
■
Because the LT1191 is a true operational amplifier, it is an
ideal choice for wideband signal conditioning, fast inte-
grators, active filters, and applications requiring speed,
accuracy and low cost.
■
■
U
APPLICATIO S
■
The LT1191 is available in 8-pin PDIP and SO packages
with standard pinouts. The normally unused Pin 5 is used
for a shutdown feature that shuts off the output and
reduces power dissipation to a mere 15mW.
Video Cable Drivers
Video Signal Processing
Fast Integrators
Pulse Amplifiers
D/A Current to Voltage Conversion
■
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
U
TYPICAL APPLICATIO
Video MUX Cable Driver
5V
7
3
V
+
–
IN1
6
Inverter Pulse Response
LT1191
SHDN
2
CMOS IN
CH. SELECT
5
4
1k
–5V
1k
1k
CABLE
75Ω
74HC04
74HC04
75Ω
1k
V
–5V
5V
5
3
+
IN2
7
SHDN
LT1191
6
LT1190 • TA02
2
4
–
AV = –1, CL = 10pF SCOPE PROBE
–5V
1k
1k
LT1191 • TA01
1
LT1191
W W U W
U W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
Total Supply Voltage (V + to V –) ............................. 18V
Differential Input Voltage ........................................ ± 6V
Input Voltage .......................................................... ± VS
Output Short-Circuit Duration (Note 2)........ Continuous
Operating Temperature Range
LT1191M (OBSOLETE) ............. –55°C to 125°C
LT1191C............................................... 0°C to 70°C
Maximum Junction Temperature ......................... 150°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
TOP VIEW
ORDER PART
NUMBER
BAL
–IN
+IN
1
2
3
4
8
7
6
5
BAL
+
V
LT1191CN8
LT1191CS8
OUT
–
V
SHDN
S8 PART MARKING
1191
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 100°C/W (N8)
TJMAX = 150°C, θJA = 150°C/W (S8)
LT1191MJ8
LT1191CJ8
J8 PACKAGE 8-LEAD CERDIP
TJMAX = 150°C, θJA = 100°C/W
OBSOLETE PACKAGE
Consider the N8 or S8 Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature
ranges.
ELECTRICAL CHARACTERISTICS
VS = ±5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
LT1191M/C
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Input Offset Voltage
N8 Package
SO-8 Package
1
5
9
mV
mV
OS
I
I
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Resistance
0.2
±0.5
25
4
1.7
µA
µA
OS
±2.5
B
e
f = 10kHz
nV/√Hz
pA/√Hz
kΩ
n
O
i
f = 10kHz
O
n
R
Differential Mode
Common Mode
70
5
IN
MΩ
pF
C
Input Capacitance
A = +1
V
2
IN
Input Voltage Range
(Note 3)
–2.5
60
3.5
V
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= – 2.5V to 3.5V
75
75
dB
CM
V = ±2.375V to ±8V
S
60
dB
A
R = 1k, V = ±3V
20
4
6
45
9
12
V/mV
V/mV
V/mV
VOL
L
O
R = 100Ω, V = ±3V
L
O
V = ±8V, R = 100Ω, V = ±5V
S
L
O
V
Output Voltage Swing
V = ±5V, R = 1k
±3.7
±6.7
±4
±7
V
V
OUT
S
L
V = ±8V, R = 1k
S
L
SR
Slew Rate
A = –2, R = 1k (Notes 4, 9)
325
450
23.9
90
V/µs
MHz
MHz
ns
V
O
L
FPBW
GBW
Full-Power Bandwidth
Gain Bandwidth Product
Rise Time, Fall Time
Rise Time, Fall Time
Propagation Delay
Overshoot
V
= 6V (Note 5)
17.2
P-P
t , t
r1 f1
A = 50, V = ±1.5V, 20% to 80% (Note 9)
100
130
1.25
2.2
160
V
O
t , t
r2 f2
A = 1, V = ±125mV, 10% to 90%
ns
V
O
t
t
A = 1, V = ±125mV, 50% to 50%
ns
PD
V
O
A = 1, V = ±125mV
25
%
V
O
Settling Time
3V Step, 0.1% (Note 6)
110
ns
s
2
LT1191
ELECTRICAL CHARACTERISTICS
VS = ±5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
LT1191M/C
SYMBOL
Diff A
PARAMETER
CONDITIONS
R = 150Ω, A = 2 (Note 7)
MIN
TYP
0.15
0.09
32
MAX
UNITS
Differential Gain
Differential Phase
Supply Current
%
V
L
V
Diff Ph
R = 150Ω, A = 2 (Note 7)
Deg
P-P
L
V
I
38
2
mA
mA
µA
ns
S
–
–
Shutdown Supply Current
Shutdown Pin Current
Turn On Time
Pin 5 at V
Pin 5 at V
1.3
I
t
t
20
50
SHDN
ON
–
Pin 5 from V to Ground, R = 1k
100
400
L
–
Turn Off Time
Pin 5 from Ground to V , R = 1k
ns
OFF
L
VS+ = 5V, VS– = 0V, VCM = 2.5V, TA = 25°C, CL ≤ 10pF, Pin 5 open circuit unless otherwise noted.
LT1191M/C
TYP
SYMBOL
PARAMETER
CONDITIONS
MIN
MAX
UNITS
V
Input Offset Voltage
N8 Package
SO-8 Package
2
7
9
mV
mV
OS
I
I
Input Offset Current
0.2
1.2
±1.5
3.5
µA
µA
OS
Input Bias Current
±0.5
B
Input Voltage Range
(Note 3)
2
55
5
V
CMRR
Common Mode Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
V
= 2V to 3.5V
70
9
dB
CM
A
V
R = 100Ωto Ground, V = 1V to 3V
L
V/mV
V
VOL
OUT
O
R = 100Ωto Ground
L
V
High
Low
3.6
3.8
0.25
250
80
OUT
V
0.4
V
OUT
SR
Slew Rate
A = –1, V = 1V to 3V
V
V/µs
MHz
mA
mA
µA
O
GBW
Gain Bandwidth Product
Supply Current
I
I
29
36
2
S
–
Shutdown Supply Current
Shutdown Pin Current
Pin 5 at V
Pin 5 at V
1.2
20
–
50
SHDN
The ● denotes the specifications which apply over the full operating temperature range of –55°C ≤ TA ≤ 125°C.
VS = ±5V, Pin 5 open circuit unless otherwise noted.
LT1191M
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
mV
V
Input Offset Voltage
N8 Package
●
●
●
●
●
●
2
8
OS
∆V /∆T
OS
Input V Drift
8
µV/°C
µA
OS
I
I
Input Offset Current
0.2
±0.5
70
2
OS
B
Input Bias Current
±2.5
µA
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= –2.5V to 3.5V
55
55
dB
CM
V = ±2.375V to ±5V
S
70
dB
A
R = 1k, V = ±3V
●
●
16
2
32
5
V/mV
V/mV
VOL
L
O
R = 100, V = ±3V
L
O
V
Output Voltage Swing
Supply Current
R = 1k
●
●
●
●
±3.7
±3.9
32
V
mA
mA
µA
OUT
L
I
I
38
S
–
Shutdown Supply Current
Shutdown Pin Current
Pin 5 at V (Note 8)
1.5
20
2.5
–
Pin 5 at V
SHDN
3
LT1191
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range of 0°C ≤ TA ≤ 70°C. VS = ±5V, Pin 5 open circuit unless otherwise noted.
LT1191C
TYP
SYMBOL
PARAMETER
CONDITIONS
MIN
MAX
UNITS
V
Input Offset Voltage
N8 Package
SO-8 Package
●
2
6
10
mV
mV
OS
∆V /∆T
Input V Drift
●
●
●
●
●
8
0.2
±0.5
70
µV/°C
µA
OS
OS
I
I
Input Offset Current
1.7
OS
B
Input Bias Current
±2.5
µA
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
= – 2.5V to 3.5V
58
58
dB
CM
V = ±2.375V to ±5V
70
dB
S
A
R = 1k, V = ±3V
R = 100, V = ±3V
●
●
20
3
40
9
V/mV
V/mV
VOL
L
O
L
O
V
Output Voltage Swing
Supply Current
R = 1k
●
●
●
●
±3.7
±3.9
32
V
mA
mA
µA
OUT
L
I
I
38
S
–
Shutdown Supply Current
Shutdown Pin Current
Pin 5 at V (Note 8)
1.4
20
2.1
–
Pin 5 at V
SHDN
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 6: Settling time measurement techniques are shown in “Take the
Guesswork Out of Settling Time Measurements,” EDN, September 19,
1985. A = –1, R = 1k.
Note 2: A heat sink is required to keep the junction temperature below
V
L
absolute maximum when the output is shorted.
Note 7: NTSC (3.58MHz). For R = 1k, Diff A = 0.07%, Diff Ph = 0.02°.
L V
Note 3: Exceeding the input common mode range may cause the output to
invert.
Note 8: See Applications section for shutdown at elevated temperatures.
Do not operate the shutdown above T > 125°C.
J
Note 4: Slew rate is measured between ±1V on the output, with a ±1.5V
input step.
Note 5: Full-power bandwidth is calculated from the slew rate
Note 9: AC parameters are 100% tested on the ceramic and plastic DIP
packaged parts (J and N suffix) and are sample tested on every lot of the
SO packaged parts (S suffix).
measurement:
FPBW = SR/2πV .
P
Optional Offset Nulling Circuit
5V
3
2
7
+
6
LT1191
4
–
8
–5V
1
INPUT OFFSET VOLTAGE CAN BE ADJUSTED OVER A ±100mV
RANGE WITH A 1kΩ TO 10kΩ POTENTIOMETER
LT1191 • TA03
4
LT1191
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Common Mode Voltage
Input Bias Current
vs Temperature
Common Mode Voltage
vs Supply Voltage
4
3
–0.3
–0.4
10
8
V
= ±5V
S
V
S
= ±5V
–55°C
25°C
6
+V COMMON MODE
125°C
4
+I
2
1
B
–0.5
–0.6
–0.7
–0.8
2
I
OS
0
25°C
–2
–4
–6
–8
–10
–55°C
0
–1
–2
–55°C
25°C
125°C
–I
B
–V COMMON MODE
125°C
–4 –3 –2 –1
0
1
2
3
4
–50 –25
0
25
50
75 100 125
0
2
4
6
8
10
COMMON MODE VOLTAGE (V)
±V SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
LT1191 • TPC01
LT1191 • TPC02
LT1191 • TPC03
Equivalent Input Noise Voltage
vs Frequency
Equivalent Input Noise Current
vs Frequency
Supply Current vs Supply Voltage
300
250
200
150
100
50
80
60
40
40
30
20
10
0
V
T
= ±5V
= 25°C
= 0Ω
V
T
= ±5V
S
S
= 25°C
A
A
R
R
= 100k
S
S
–55°C
25°C
125°C
20
0
0
10
100
1k
10k
100k
10
100
1k
10k
100k
0
2
4
6
8
10
FREQUENCY (Hz)
FREQUENCY (Hz)
±SUPPLY VOLTAGE (V)
LT1191 • TPC04
LT1191 • TPC05
LT1191 • TPC06
Shutdown Supply Current
vs Temperature
Open-Loop Voltage Gain
vs Temperature
Open-Loop Voltage Gain
vs Load Resistance
50k
40k
5.0
4.5
50k
40k
30k
20k
10k
0
V
= ±5V
V
V
A
= ±5V
= ±3V
= 25°C
S
S
O
R
= 1k
T
V
SHDN
= –V + 0.4V
L
EE
4.0
3.5
3.0
2.5
2.0
1.5
1.0
30k
20k
10k
0
V
SHDN
= –V + 0.2V
EE
R
= 100Ω
L
V
= –V
50
SHDN
EE
V
V
= ±5V
= ±3V
S
O
–50 –25
0
25
50
75 100 125
–50 –25
0
25
75 100 125
10
100
1000
TEMPERATURE (°C)
TEMPERATURE (°C)
LOAD RESISTANCE (Ω)
LT1191 • TPC08
LT1191 • TPC07
LT1191 • TPC09
5
LT1191
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Gain Bandwidth Product
vs Supply Voltage
Output Impedance
vs Frequency
Gain, Phase vs Frequency
100
80
60
40
20
0
100
80
60
40
20
0
95
85
75
65
55
100
10
V
T
= ±5V
= 25°C
= 1k
V
T
= ±5V
S
S
A
= 25°C
A
R
L
PHASE
T
= –55°C, 25°C, 125°C
A
1
A
V
= –1
A
V
= –100
GAIN
A
V
= –10
0.1
0.01
–20
100k
–20
1G
1k
10k
100k
1M
10M
100M
1M
10M
100M
0
2
4
6
8
10
FREQUENCY (Hz)
FREQUENCY (Hz)
±V SUPPLY VOLTAGE (V)
LT1191 • TPC13
LT1191 • TPC10
LT1191 • TPC11
Unity Gain Frequency and
Phase Margin vs Temperature
Common Mode Rejection Ratio
vs Frequency
Power Supply Rejection Ratio
vs Frequency
110
100
90
50
48
46
44
42
70
60
50
40
30
20
10
80
60
40
20
V
= ±5V
= 1k
V
T
= ±5V
S
V
V
T
= ±5V
RIPPLE
= 25°C
S
L
S
R
= 25°C
= ±300mV
A
R
= 1k
L
A
–PSRR
+PSRR
PHASE MARGIN
UNITY GAIN FREQUENCY
40
38
36
34
0
–20
–40
80
70
–50 –25
0
25
50
75 100 125
1k
10k
100k
1M
10M
100M
100k
1M
10M
100M
1G
TEMPERATURE (°C)
FREQUENCY (Hz)
FREQUENCY (Hz)
LT1191 • TPC14
LT1191 • TPC15
LT1191 • TPC12
Output Short-Circuit Current
vs Temperature
Output Voltage Swing
vs Load Resistance
Output Swing vs Supply Voltage
100
90
10
8
5
3
V
= ±5V
R
L
= 1k
V
= ±5V
S
S
+V , 25°C,
OUT
T
= –55°C
A
125°C, –55°C
6
T
= 25°C
4
A
1
2
T
= 125°C
A
0
–1
–3
–5
–2
–4
80
–V , –55°C,
OUT
25°C,125°C
T
= 125°C
A
–6
–8
T
= –55°C, 25°C
A
70
–10
–50 –25
0
25
50
75 100 125
0
2
4
6
8
10
10
100
LOAD RESISTANCE (Ω)
1000
TEMPERATURE (°C)
±V SUPPLY VOLTAGE (V)
LT1191 • TPC16
LT1191 • TPC17
LT1191 • TPC18
6
LT1191
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Output Voltage Step
vs Settling Time, AV = –1
Output Voltage Step
vs Settling Time, AV = 1
Slew Rate vs Temperature
600
500
400
300
4
2
4
2
V
= ±5V
= 25°C
= 1k
V
= ±5V
= 25°C
= 1k
S
A
L
S
A
L
T
T
R
R
–SLEW RATE
+SLEW RATE
1mV
V
O
= ±2V
10mV
10mV
1mV
0
0
10mV
1mV
1mV
10mV
–2
–4
–2
–4
V
= ±5V
= 25°C
= 1k
S
A
L
T
R
–50 –25
0
25
50
75 100 125
20 40
60
80 100 120 140 160
SETTLING TIME (ns)
50 70 90 110 130 150 170 190 210 230
SETTLING TIME (ns)
TEMPERATURE (°C)
LT1191 • TPC19
LT1191 • TPC20
LT1191 • TPC21
Large-Signal Transient Response
Small-Signal Transient Response
Output Overload
LT1191 • TPC22
LT1191 • TPC23
LT1191 • TPC24
AV = 1, CL = 10pF SCOPE PROBE
AV = 1, SMALL-SIGNAL RISE TIME,
WITH FET PROBES
AV = –1, VIN = 12VP-P
7
LT1191
W U U
U
APPLICATIO S I FOR ATIO
Power Supply Bypassing
In most applications, and those requiring good settling
time, it is important to use multiple bypass capacitors. A
0.1µF ceramic disc in parallel with a 4.7µF tantalum is
recommended. Two oscilloscope photos with different
bypass conditions are used to illustrate the settling time
characteristics of the amplifier. Note that although the
outputwaveformlooksacceptableat1V/DIV,whenampli-
fied to1mV/DIV the settling time to 2mV is 2.61µs for the
0.1µF bypass; the time drops to 143ns with multiple
bypass capacitors.
TheLT1191isquitetolerantofpowersupplybypassing. In
some applications a 0.1µF ceramic disc capacitor placed
1/2 inch from the amplifier is all that is required. A scope
photo of the amplifier output with no supply bypassing is
used to demonstrate this bypassing tolerance, RL = 1kΩ.
No Supply Bypass Capacitors
Settling Time Poor Bypass
VOUT
1V/DIV
VOUT
1mV/DIV
0V
0V
LT1191 • TA04
AV = –1, IN DEMO BOARD, RL = 1kΩ
Supply bypassing can also affect the response in the
frequency domain. It is possible to see a slight rise in the
frequency response at 130MHz depending on the gain
configuration, supply bypass, inductance in the supply
leads and printed circuit board layout. This can be further
minimized by not using a socket.
LT1191 • TA06
SETTLING TIME TO 2mV, AV = –1
SUPPLY BYPASS CAPACITORS = 0.1µF
Settling Time Good Bypass
Closed-Loop Voltage Gain vs Frequency
20
V
= ±5V
= 25°C
= 1k
S
T
A
R
L
10
0
A
= 2
= 1
V
VOUT
1V/DIV
VOUT
1mV/DIV
A
0V
0V
V
–10
–20
LT1191 • TA07
100k
1M
10M
FREQUENCY (Hz)
100M
1G
SETTLING TIME TO 2mV, AV = –1
SUPPLY BYPASS CAPACITORS = 0.1µF + 4.7µF TANTALUM
LT1191 • TA05
8
LT1191
W U U
APPLICATIO S I FOR ATIO
U
Cable Terminations
Using the Shutdown Feature
The LT1191 operational amplifier has been optimized as a
lowcostvideocabledriver.The±50mAguaranteedoutput
current enables the LT1191 to easily deliver 7.5VP-P into
100Ω, while operating on ±5V supplies or 2.6VP-P on a
single 5V supply.
The LT1191 has a unique feature that allows the amplifier
to be shut down for conserving power or for multiplexing
several amplifiers onto a common cable. The amplifier will
shutdownbytakingPin5toV–.Inshutdown,theamplifier
dissipates15mWwhilemaintainingatruehighimpedance
output state of 15kΩ in parallel with the feedback resis-
tors. The amplifiers must be used in a noninverting con-
figurationforMUXapplications.Ininvertingconfigurations
the input signal is fed to the output through the feedback
components. The following scope photos show that with
very high RL, the output is truly high impedance; the
output slowly decays toward ground. Additionally, when
theoutputisloadedwithaslittleas1kΩtheamplifiershuts
off in 400ns. This shutoff can be under the control of HC
CMOS operating between 0V and –5V.
When driving a cable it is important to terminate the cable
to avoid unwanted reflections. This can be done in one of
two ways: single termination or double termination. With
single termination, the cable must be terminated at the
receiving end (75Ω to ground) to absorb unwanted en-
ergy. The best performance can be obtained by double
termination(75Ωinserieswiththeoutputoftheamplifier,
and 75Ω to ground at the other end of the cable). This
termination is preferred because reflected energy is ab-
sorbed at each end of the cable. When using the double
terminationtechniqueitisimportanttonotethatthesignal
is attenuated by a factor of 2, or 6dB. This can be compen-
sated for by taking a gain of 2, or 6dB in the amplifier. The
cable driver has a –3dB bandwidth of 100MHz while
drivingthe150Ωload. Notetheresponsecanbeimproved
by lowering the impedance of the feedback elements.
Output Shutdown
0V
VSHDN
–5V
VOUT
Double Terminated Cable Driver
5V
3
2
7
+
CABLE
75Ω
6
LT1191
–
4
75Ω
R
FB
R
G
–5V
LT1191 • TA09
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 1, RL = ∞
Cable Driver Voltage Gain vs Frequency
Output Shutdown
10
A
R
R
= 2
V
T
= ±5V
= 25°C
V
S
= 1k
FB
A
= 330Ω
G
0V
5
0
VSHDN
–5V
R
R
= 1k
FB
G
= 1k
A
= 1
V
VOUT
R
R
= 300Ω
FB
G
= 300Ω
–5
–10
100k
1M
10M
100M
FREQUENCY (Hz)
LT1191 • TA10
LT1191 • TA08
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 1, RL = 1kΩ
9
LT1191
PPLICATI
O U
W
U
A
S I FOR ATIO
Other precautions include:
The ability to maintain shutoff is shown on the curve
Shutdown Supply Current vs Temperature in the Typical
Performance Characteristics section. At very high
elevated temperatures it is important to hold the SHDN
pinclosetothenegativesupplytokeepthesupplycurrent
from increasing.
1. Use a ground plane (see Design Note 50, High Fre-
quency Amplifier Evaluation Board).
2. Do not use high source impedances. The input
capacitance of 2pF and RS = 10k, for instance, will give
an 8MHz – 3dB bandwidth.
Murphy Circuits
3. PC board socket may reduce stability.
There are several precautions the user should take when
using the LT1191 in order to realize its full capability.
Although the LT1191 can drive a 30pF load, isolating the
capacitance with 10Ω can be helpful. Precautions prima-
rily have to do with driving large capacitive loads.
4. A feedback resistor of 1k or lower reduces the effects
of stray capacitance at the inverting input. (For in-
stance, closed-loop gain of 2 can use RFB = 300Ω and
RG = 300Ω.)
Driving Capacitive Load
Driving Capacitive Load
LT1191 • TA11
LT1191 • TA12
AV = –1, IN DEMO BOARD, CL = 30pF
AV = –1, IN DEMO BOARD, CL = 30pF
WITH 10Ω ISOLATING RESISTOR
Murphy Circuits
5V
5V
5V
3
2
3
2
3
2
7
7
7
+
+
–
+
–
COAX
6
6
6
LT1191
LT1191
LT1191
–
4
4
4
1X SCOPE
PROBE
–5V
–5V
–5V
SCOPE
PROBE
LT1191 • TA13
An Unterminated Cable Is
a Large Capacitive Load
A 1X Scope Probe Is a
Large Capacitive Load
A Scope Probe on the Inverting
Input Reduces Phase Margin
10
LT1191
W
W
SI PLIFIED SCHE ATIC
+
7
V
V
V
BIAS
BIAS
C
M
+
3
C
FF
2
–
V
6
+V
+V
OUT
*
–
4
V
LT1191 • TA14
5
1
8
SHDN
BAL
BAL
*SUBSTRATE DIODE, DO NOT FORWARD BIAS
U
PACKAGE DESCRIPTIO
J8 Package
8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
CORNER LEADS OPTION
(4 PLCS)
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.405
(10.287)
MAX
0.005
(0.127)
MIN
0.200
(5.080)
MAX
0.045 – 0.068
0.300 BSC
(1.143 – 1.727)
(0.762 BSC)
FULL LEAD
6
5
4
8
7
OPTION
0.015 – 0.060
(0.381 – 1.524)
0.025
(0.635)
RAD TYP
0.220 – 0.310
(5.588 – 7.874)
0.008 – 0.018
0° – 15°
(0.203 – 0.457)
J8 1298
1
2
3
0.045 – 0.065
(1.143 – 1.651)
0.125
3.175
MIN
0.014 – 0.026
(0.360 – 0.660)
0.100
(2.54)
BSC
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
OBSOLETE PACKAGE
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 represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
11
LT1191
U
PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
8
1
7
6
5
4
0.065
(1.651)
TYP
0.255 ± 0.015*
(6.477 ± 0.381)
0.009 – 0.015
(0.229 – 0.381)
0.125
0.020
(0.508)
MIN
(3.175)
MIN
+0.035
–0.015
2
3
0.325
0.018 ± 0.003
0.100
(2.54)
BSC
N8 1098
+0.889
8.255
(0.457 ± 0.076)
(
)
–0.381
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
0.010 – 0.020
(0.254 – 0.508)
7
5
8
6
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.008 – 0.010
(0.203 – 0.254)
0°– 8° TYP
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
SO8 1298
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
3
4
2
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1363
High Speed Operational Amplifier
High Speed Operational Amplifier
70MHz Gain Bandwidth, 1000V/µs Slew Rate, I = 7.5mA Max
S
LT1813
100MHz Gain Bandwidth, 750V/µs Slew Rate, I = 3.6mA Max
S
1191fa LT/CP 0801 1.5K REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1991
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号:
LT1191MJ8/883B
IC OP-AMP, 8000 uV OFFSET-MAX, 90 MHz BAND WIDTH, CDIP8, HERMETIC SEALED, CERDIP-8, Operational Amplifier
Linear
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