LT1222IS8#PBF [Linear]
LT1222 - 500MHz, 3nV/rtHz, AV >=10 Operational Amplifier; Package: SO; Pins: 8; Temperature Range: -40°C to 85°C;
| 型号： | LT1222IS8#PBF |
| 厂家： | 
Linear |
| 描述： | LT1222 - 500MHz, 3nV/rtHz, AV >=10 Operational Amplifier; Package: SO; Pins: 8; Temperature Range: -40°C to 85°C 放大器 光电二极管 |
| 文件： | 总12页 (文件大小：249K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1222
500MHz, 3nV/√Hz, AV ≥ 10
Operational Amplifier
U
FEATURES
DESCRIPTIO
The LT®1222 is a low noise, very high speed operational
amplifier with superior DC performance. The LT1222 is
stable in a noise gain of 10 or greater without compensa-
tion, or the part can be externally compensated for lower
closed-loop gain at the expense of lower bandwidth and
slew rate. It features reduced input offset voltage, lower
input bias currents, lower noise and higher DC gain than
devices with comparable bandwidth and slew rate. The
circuit is a single gain stage that includes proprietary DC
gain enhancement circuitry to obtain precision with high
speed. Thehighgainandfastsettlingtimemakethecircuit
an ideal choice for data acquisition systems. The circuit is
also capable of driving capacitive loads which makes it
useful in buffer or cable driver applications. The compen-
sation node can also be used to clamp the output swing.
■
Gain-Bandwidth: 500MHz
Gain of 10 Stable Uncompensated
■
■
Slew Rate: 200V/μs
■
Input Noise Voltage: 3nV/√Hz
C-LoadTM Op Amp Drives Capacitive Loads
■
■
External Compensation Pin
Maximum Input Offset Voltage: 300μV
Maximum Input Bias Current: 300nA
■
■
■
Maximum Input Offset Current: 300nA
■
Minimum Output Swing Into 500Ω: 12V
■
Minimum DC Gain: 100V/mV, RL = 500Ω
■
Settling Time to 0.1%: 75ns, 10V Step
■
Settling Time to 0.01%: 120ns, 10V Step
Differential Gain: 0.4%, AV = 2, RL = 150Ω
Differential Phase: 0.1°, AV = 2, RL = 150Ω
■
■
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The LT1222 is a member of a family of fast, high perfor-
mance amplifiers that employ Linear Technology
Corporation’s advanced complementary bipolar process-
ing. For unity-gain stable applications the LT1220 can be
used, and for gains of 4 or greater the LT1221 can be used.
APPLICATIO S
■
Wideband Amplifiers
Buffers
Active Filters
Video and RF Amplification
Cable Drivers
8-, 10-, 12-Bit Data Acquisition Systems
■
■
■
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
C-Load is a trademark of Linear Technology Corporation.
■
■
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TYPICAL APPLICATIO
AV = 10 with Output Clamping
AV = –1, CC = 30pF Pulse Response
15V
3k
1N5711
6
1N5711
1N4148
0.1μF
3
2
5
+
V
IN
LT1222
⎥ V ⎥ ≤ 0.5V
OUT
–
909Ω
100Ω
LT1222 • TA01
LT1222 • TA02
VIN = 100mV
f = 5MHz
RF = RG = 1k
VS 15V
=
1222fc
1
LT1222
W W W
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ABSOLUTE AXI U RATI GS (Note 1)
Total Supply Voltage (V+ to V–) ............................. 36V
Differential Input Voltage ........................................ 6V
Input Voltage .......................................................... VS
Output Short-Circuit Duration (Note 2)........... Indefinite
Specified Temperature Range
Operating Temperature Range
LT1222C........................................... –40°C TO 85°C
LT1222I ...............................................–40°C to 85°C
LT1222M (OBSOLETE) ............... –55°C to 125°C
Maximum Junction Temperature (See Below)
Plastic Package ............................................... 150°C
Ceramic Package (OBSOLETE) .................. 175°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
LT1222C (Note 3)................................... 0°C to 70°C
LT1222I ...............................................–40°C to 85°C
LT1222M (OBSOLETE) ............... –55°C to 125°C
W U
/O
PACKAGE RDER I FOR ATIO
TOP VIEW
ORDER PART
NUMBER
ORDER PART
TOP VIEW
NULL
NUMBER
NULL
–IN
1
2
3
4
NULL
8
7
6
5
+
V
8
LT1222CN8
LT1222CS8
LT1222IS8
+
SPECIAL
V
1
3
7
5
NULL
+IN
V
OUT
ORDER
CONSULT
FACTORY
–
6
V
COMP
–IN
2
V
OUT
S8 PART MARKING
S8 PACKAGE
N8 PACKAGE
8-LEAD PLASTIC DIP
COMP
+IN
8-LEAD PLASTIC SOIC
4
1222
1222I
–
TJMAX = 150°C, θJA = 130°C/W (N)
V
TJMAX = 150°C, θJA = 190°C/W (S)
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 175°C, θJA = 150°C/W
J8 PACKAGE
ORDER PART
8-LEAD CERAMIC DIP
TJMAX = 175°C, θJA = 100°C/W (J)
NUMBER
LT1222MJ8
OBSOLETE PACKAGE
OBSOLETE PACKAGE
Consider the N8 or S8 Packages for Alternate Source
Consider the N8 or S8 Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS TA = 25°C, VS = 15V, VCM = 0V, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
100
100
100
3
MAX
300
300
300
UNITS
μV
V
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Resistance
(Note 4)
OS
I
I
nA
OS
B
nA
e
i
f = 10kHz
f = 10kHz
nV/√Hz
pA/√Hz
n
2
n
R
V
=
12V
20
12
45
12
MΩ
kΩ
pF
IN
CM
Differential
C
Input Capacitance
2
IN
Input Voltage Range (Positive)
Input Voltage Range (Negative)
14
–13
V
V
–12
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Swing
V
=
12V
100
98
120
110
200
13
dB
dB
CM
V = 5V to 15V
S
A
V
=
10V, R = 500Ω
100
12
V/mV
V
VOL
OUT
L
V
R = 500Ω
L
OUT
I
Output Current
V
=
OUT
12V
24
26
mA
OUT
SR
Slew Rate
(Note 5)
150
200
3.2
500
V/μs
MHz
Full Power Bandwidth
Gain-Bandwidth
10V Peak (Note 6)
f = 1MHz
GBW
MHz
1222fc
2
LT1222
VS = 15V, TA = 25°C, VCM = 0V, unless otherwise specified.
ELECTRICAL CHARACTERISTICS
SYMBOL
t , t
PARAMETER
CONDITIONS
A = 10, 10% to 90%, 0.1V
MIN
TYP
2.4
43
MAX
UNITS
ns
Rise Time, Fall Time
Overshoot
r
f
V
A = 10, 0.1V
V
%
Propagation Delay
Settling Time
A = 10, 50% V to 50% V , 0.1V
5.2
ns
V
IN
OUT
t
10V Step, 0.1%
10V Step, 0.01%
75
120
ns
ns
s
Differential Gain
Differential Phase
A = 2, C = 50pF, f = 3.58MHz, R = 150Ω (Note 7)
0.40
0.15
%
%
V
C
L
A = 10, C = 0pF, f = 3.58MHz, R = 1k (Note 7)
V
C
L
A = 2, C = 50pF, f = 3.58MHz, R = 150Ω (Note 7)
0.10
0.01
DEG
DEG
V
C
L
A = 10, C = 0pF, f = 3.58MHz, R = 1k (Note 7)
V
C
L
R
Output Resistance
Supply Current
A = 10, f = 1MHz
V
0.1
8
Ω
mA
O
I
10.5
S
The ● denotes the specifications which apply over the temperature range 0°C ≤ TA ≤ 70°C, otherwise specifications are at TA = 25°C.
VS = 15V, VCM = 0V, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
100
5
MAX
UNITS
μV
μV/°C
nA
V
Input Offset Voltage
(Note 4)
●
●
●
●
●
●
●
●
●
●
●
600
OS
Input V Drift
OS
I
I
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Swing
100
100
120
110
200
13
400
400
OS
B
nA
CMRR
PSRR
V
=
12V
100
98
dB
CM
V = 5V to 15V
S
dB
A
V
=
10V, R = 500Ω
100
12
V/mV
V
VOL
OUT
L
V
R = 500Ω
L
OUT
I
Output Current
V
=
OUT
12V
24
26
mA
V/μs
mA
OUT
SR
Slew Rate
(Note 5)
150
200
8
I
Supply Current
11
S
The ● denotes the specifications which apply over the temperature range –55°C ≤ TA ≤ 125°C for LT1222M, –40°C ≤ TA ≤ 85°C for
LT1222I, otherwise specifications are at TA = 25°C. VS = 15V, VCM = 0V, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
100
5
MAX
UNITS
V
Input Offset Voltage
(Note 4)
●
●
●
●
●
●
●
600
μV
μV/°C
nA
OS
Input V Drift
OS
I
I
Input Offset Current
100
100
120
110
200
800
OS
B
Input Bias Current
1000
nA
CMRR
PSRR
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Swing
V
=
12V
98
98
50
dB
CM
V = 5V to 15V
S
dB
A
V
=
10V, R = 500Ω
V/mV
VOL
OUT
L
V
R = 500Ω
●
●
10
12
13
13
V
V
OUT
L
R = 1k
L
I
Output Current
V
V
=
=
10V
12V
●
●
20
12
26
13
mA
mA
OUT
OUT
OUT
SR
Slew Rate
(Note 5)
●
●
110
200
8
V/μs
mA
I
Supply Current
11
S
Note 1: Stresses beyond those listed under Absolute Maximum Ratings may
cause permanent damage to the device. Exposure to any Absolute Maximum
Rating condition for extended periods may affect device reliability and lifetime.
guaranteed to meet the extended temperature limits.
Note 4: Input offset voltage is pulse tested and is exclusive of warm-up drift.
Note 5: Slew rate is measured between 10V on an output swing of 12V.
Note 2: A heat sink may be required when the output is shorted indefinitely.
Note 6: FPBW = SR/2πV .
P
Note 3: The LT1222C is guaranteed to meet specified performance from 0°C
to 70°C and is designed, characterized and expected to meet these extended
temperature limits, but is not tested at –40°C and 85°C. The LT1222I is
Note 7: Differential Gain and Phase are tested with five amps in series.
Attenuators of 1/Gain are used as loads.
1222fc
3
LT1222
TYPICAL PERFORMANCE CHARACTERISTICS
W
U
Input Common Mode Range
vs Supply Voltage
Supply Current vs Supply Voltage
and Temperature
Output Voltage Swing
vs Supply Voltage
20
15
10
5
11
10
20
15
10
5
T
= 25°C
OS
T
= 25°C
A
A
L
ΔV = 0.5mV
R
= 500Ω
ΔV = 30mV
OS
T = 125°C
T = 25°C
+V
9
8
CM
+V
SW
–V
CM
–V
SW
7
6
5
T = –55°C
0
0
0
5
10
15
20
0
5
10
15
20
0
5
10
15
20
SUPPLY VOLTAGE ( V)
SUPPLY VOLTAGE ( V)
SUPPLY VOLTAGE ( V)
LT1222 • TPC01
LT1222 • TPC02
LT1222 • TPC03
Output Voltage Swing
vs Resistive Load
Input Bias Current
vs Input Common Mode Voltage
Open-Loop Gain
vs Resistive Load
500
400
30
25
120
110
100
90
T
= 25°C
OS
V
T
=
15V
T
= 25°C
A
S
A
A
ΔV = 30mV
= 25°C
300
V
=
15V
V
S
200
+
20
15
10
5
15V SUPPLIES
I
B
100
–
I
B
0
= 5V
S
–100
–200
–300
80
70
5V SUPPLIES
1k
–400
–500
0
–15 –10
–5
0
5
10
15
10
100
10k
10
100
1k
10k
INPUT COMMON MODE VOLTAGE (V)
LOAD RESISTANCE (Ω)
LOAD RESISTANCE (Ω)
LT1222 • TPC05
LT1222 • TPC04
LT1222 • TPC06
Output Short-Circuit Current
vs Temperature
Power Supply Rejection Ratio
vs Frequency
Input Noise Spectral Density
1000
100
100
10
50
45
40
35
30
25
20
120
100
V
=
5V
V
= 15V
S
V
T
=
15V
S
S
A
T
= 25°C
= 101
= 25°C
A
A
V
R
= 100k
+PSRR
S
80
60
i
n
–PSRR
10
1
1
40
20
0
e
n
0.1
100k
10
100
1k
10k
–50 –25
0
25
50
75 100 125
100
1k
10k 100k
1M
10M 100M
TEMPERATURE (°C)
FREQUENCY (Hz)
FREQUENCY (Hz)
LT1222 • TPC08
LT1222 • TPC07
LT1222 • TPC09
1222fc
4
LT1222
W
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TYPICAL PERFORMANCE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
Output Swing and Error
Output Swing and Error
vs Settling Time (Inverting)
vs Settling Time (Noninverting)
10
8
10
8
120
100
V
T
=
15V
V
T
=
15V
S
A
S
A
V
=
15V
S
= 25°C
= 25°C
T
= 25°C
A
6
4
6
4
10mV
1mV
1mV
10mV
1mV
80
60
2
0
2
0
–2
–4
–2
–4
40
20
0
10mV
1mV
10mV
–6
–8
–6
–8
–10
–10
0
25
50
75
100
125
0
25
50
75
100
125
1k
100k
1M
10M
100M
10k
SETTLING TIME (ns)
SETTLING TIME (ns)
FREQUENCY (Hz)
LT1222 • TPC11
LT1222 • TPC12
LT1222 • TPC10
Voltage Gain and Phase
vs Frequency
Frequency Response
vs Capacitive Load
Closed-Loop Output Impedance
vs Frequency
120
100
80
100
80
30
28
26
24
10
1
V
= 15V
= 25°C
= 10
V
= 15V
V
=
15V
S
A
V
S
S
A
V
T
T
= 25°C
= –10
A
V
= 15V
A
C = 100pF
C = 50pF
S
V
= 5V
S
60
V
=
5V
S
22
20
0.1
60
40
20
0
40
20
0
C = 0
18
16
14
12
10
C = 500pF
C = 1000pF
0.01
T
= 25°C
1k
A
0.001
–20
10k
100k
1M
10M
100M
100
10k
100k
1M 10M 100M
1
10
100
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (MHz)
LT1222 • TPC15
LT1222 • TPC13
LT1222 • TPC14
Total Harmonic Distortion
vs Frequency
Gain-Bandwidth vs Temperature
Slew Rate vs Temperature
0.01
0.001
550
525
500
475
450
425
400
275
250
225
200
175
150
125
V
V
=
15V
RMS
V
= 15V
S
O
L
S
V
A
C
= 15V
S
V
C
= 3V
= –10
= 0
R
= 500Ω
+
–
(SR ) + (SR )
SR =
2
A
= 10
V
0.0001
10
100
1k
FREQUENCY (Hz)
10k
100k
–50 –25
0
25
50
75 100 125
–50 –25
0
25
50
75 100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
LT1222 • TPC18
LT1222 • TPC16
LT1222 • TPC17
1222fc
5
LT1222
TYPICAL PERFORMANCE CHARACTERISTICS
W
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Large Signal, AV = 10,
CL = 10,000pF
Small Signal, AV = 10
Large Signal, AV = 10
LT1222 • TPC19
LT1222 • TPC20
LT1222 • TPC21
VS
=
15V f = 5MHz
VS
=
15V f = 2MHz
VS
=
15V f = 20kHz
RF = 909Ω
RG = 100Ω
RF = 909Ω
G = 100Ω
RF = 909Ω
RG = 100Ω
VIN = 20mV
VIN = 2V
V
IN = 2V
R
Small Signal, AV = –10,
CL = 1,000pF
Small Signal, AV = –10
Large Signal, AV = –10
LT1222 • TPC22
LT1222 • TPC23
LT1222 • TPC24
VS
=
15V f = 5MHz
VS
=
15V f = 2MHz
VS
= 15V f = 500kHz
RF = 1k
RG = 100Ω(75)
R
F = 1k
RF = 1k
VIN = 20mV
VIN = 2V
RG = 100Ω (75) VIN = 15mV
RG = 100Ω (75)
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APPLICATIONS INFORMATION
The LT1222 is stable in noise gains of 10 or greater and
may be inserted directly into HA2520/2/5, HA2541/2/4,
AD817, AD847, EL2020, EL2044 and LM6361 applica-
tions, provided that the nulling circuitry is removed and
the amplifier configuration has a high enough noise gain.
The suggested nulling circuit for the LT1222 is shown in
the following figure.
Layout and Passive Components
The LT1222 amplifier is easy to apply and tolerant of less
than ideal layouts. For maximum performance (for ex-
ample, fast settling time) use a ground plane, short lead
lengthsandRF-qualitybypasscapacitors(0.01μFto0.1μF).
For high drive current applications use low ESR bypass
capacitors (1μF to 10μF tantalum). Sockets should be
avoided when maximum frequency performance is re-
quired. For more details see Design Note 50. Feedback
resistors greater than 5k are not recommended because a
pole is formed with the input capacitance which can cause
peaking or oscillations. Stray capacitance on Pin 5 should
be minimized. Bias current cancellation circuitry is em-
ployedontheinputsoftheLT1222sotheinputbiascurrent
and input offset current have identical specifications. For
this reason, matching the impedance on the inputs to
Offset Nulling
+
V
5k
1
0.1μF
3
2
8
+
7
4
6
LT1222
–
0.1μF
–
LT1222 • AI01
V
reduce bias current errors is not necessary.
1222fc
6
LT1222
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APPLICATIONS INFORMATION
Output Clamping
may be used to reduce overshoot, to allow the amplifier to
be used in lower noise gains, or simply to reduce band-
width. Table 1 shows gain and compensation capacitor
vresus–3dBbandwidth, maximumfrequencypeakingand
small-signal overshoot.
Access to the internal compensation node at Pin 5 allows
the output swing of the LT1222 to be clamped. An example
is shown on the first page of this data sheet. The compen-
sation node is approximately one diode drop above the
output and can source or sink 1.2mA. Back-to-back Schot-
tky diodes clamp Pin 5 to a diode drop above ground so the
output is clamped to 0.5V (the drop of the Schottkys at
1.2mA). The diode reference is bypassed for good AC
response. This circuit is useful for amplifying the voltage at
false sum nodes used in settling time measurements.
Table 1
A
V
C (pF)
C
f (MHz)
–3dB
Max Peaking (dB)
Overshoot (%)
–1
–1
–1
–1
5
30
50
82
150
10
20
30
50
0
99
4.2
0.9
0
36
13
0
70
32
13
0
0
140
100
34
3.8
0
35
5
Capacitive Loading
5
The LT1222 is stable with capacitive loads. This is accom-
plishedbysensingtheloadinducedoutputpoleandadding
compensation at the amplifier gain node. As the capacitive
load increases, both the bandwidth and phase margin
decrease. There will be peaking in the frequency domain as
shown in the curve of Frequency Response vs Capacitive
Load. The small-signal transient response will have more
overshoot as shown in the photo of the small-signal
responsewith1000pFload.Thelarge-signalresponsewith
a 10,000pF load shows the output slew rate being limited
to 4V/μs by the short-circuit current. The LT1222 can drive
coaxialcabledirectly, butforbestpulsefidelityaresistorof
value equal to the characteristic impedance of the cable
(i.e., 75Ω) should be placed in series with the output. The
other end of the cable should be terminated with the same
value resistor to ground.
5
0
1
5
15
0
0
10
10
10
10
20
20
20
150
111
40
9.5
0.2
0
45
10
2
5
10
20
0
17
0
0
82
0.1
0
10
0
5
24
10
14
0
0
For frequencies < 10MHz the frequency response of the
amplifier is approximately:
f = 1/[2π • 53Ω • (CC + 6pF) • (Noise Gain)]
The slew rate is affected as follows:
SR = 1.2mA/(CC + 6pF)
Compensation
An example would be a gain of –10 (noise gain of 11) and
CC = 20pF which has 10.5MHz bandwidth and 46V/μs slew
rate. It should be noted that the LT1222 is not stable in
AV = 1 unless CC = 50pF and a 1k resistor is used as the
feedback resistor. The 1k and input capacitance increase
the noise gain at frequency to aid stability.
The LT1222 has a typical gain-bandwidth product of
500MHz which allows it to have wide bandwidth in high
gain configurations (i.e., in a gain of 100, it will have a
bandwidth of about 5MHz). For added flexibility the ampli-
fierfrequencyresponsemaybeadjustedbyaddingcapaci-
tance from Pin 5 to ground. The compensation capacitor
1222fc
7
LT1222
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TYPICAL APPLICATIONS N
VOS Null Loop
Two Op Amp Instrumemtation Amplifier
R5
220Ω
R4
10k
150k
150k
1
R1
10k
R2
1k
V
IN
+
8
V
A
OUT
V
LT1222
= 1001
–
+
R3
1k
25k
–
+
LT1220
V
LT1222
–
IN
OUT
10k
10k
100pF
25Ω
V
+
GAIN = [R4/R3][1 + (1/2)(R2/R1 + R3/R4) + (R2 + R3)/R5] = 102
TRIM R5 FOR GAIN
–
TRIM R1 FOR COMMON MODE REJECTION
LT1097
100pF
LT1222 • TA03
BW = 3MHz
LT1222 • TA04
+
W
W
SI PLIFIED SCHE ATIC
+
V
7
NULL
1
8
BIAS 2
BIAS 1
COMP
5
6
OUT
–IN
2
+IN
3
4
–
V
LT1222 • SS
1222fc
8
LT1222
U
PACKAGE DESCRIPTION
H Package
8-Lead TO-5 Metal Can (.200 Inch PCD)
(Reference LTC DWG # 05-08-1320)
0.335 – 0.370
(8.509 – 9.398)
DIA
0.027 – 0.045
(0.686 – 1.143)
0.305 – 0.335
(7.747 – 8.509)
45°TYP
PIN 1
0.040
(1.016)
MAX
0.028 – 0.034
(0.711 – 0.864)
0.050
(1.270)
MAX
0.165 – 0.185
(4.191 – 4.699)
0.200
(5.080)
TYP
REFERENCE
PLANE
SEATING
PLANE
GAUGE
PLANE
0.500 – 0.750
(12.700 – 19.050)
0.010 – 0.045*
(0.254 – 1.143)
H8(TO-5) 0.200 PCD 1197
0.110 – 0.160
(2.794 – 4.064)
INSULATING
STANDOFF
0.016 – 0.021**
(0.406 – 0.533)
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND 0.045" BELOW THE REFERENCE PLANE
0.016 – 0.024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610)
J8 Package
8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
0.405
(10.287)
MAX
CORNER LEADS OPTION
(4 PLCS)
0.005
(0.127)
MIN
6
5
8
7
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.025
0.220 – 0.310
0.045 – 0.068
(0.635)
RAD TYP
(5.588 – 7.874)
(1.143 – 1.727)
FULL LEAD
OPTION
1
2
3
4
0.200
(5.080)
MAX
0.300 BSC
(0.762 BSC)
0.015 – 0.060
(0.381 – 1.524)
0.008 – 0.018
(0.203 – 0.457)
0° – 15°
0.045 – 0.065
(1.143 – 1.651)
0.125
3.175
MIN
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
0.014 – 0.026
(0.360 – 0.660)
0.100
(2.54)
BSC
J8 1298
OBSOLETE PACKAGES
1222fc
9
LT1222
U
PACKAGE DESCRIPTION
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
8
7
6
5
.255 .015*
(6.477 0.381)
1
2
4
3
.130 .005
.300 – .325
.045 – .065
(3.302 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
.120
.020
(0.508)
MIN
(3.048)
MIN
+.035
.325
–.015
.018 .003
(0.457 0.076)
.100
(2.54)
BSC
+0.889
8.255
(
)
N8 1002
–0.381
NOTE:
INCHES
1. DIMENSIONS ARE
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
1222fc
10
LT1222
U
PACKAGE DESCRIPTION
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
.045 .005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.160 .005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 .005
TYP
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
SO8 0303
1222fc
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
LT1222
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1220
45MHz, 250V/μs Amplifier
150MHz, 250V/μs Amplifier
Unity Gain Stable Version of the LT1222
LT1221
A ≥ 4 Version of the LT1222
V
1222fc
LT 0507 REV C • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
© LINEAR TECHNOLOGY CORPORATION 1992
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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