LINER LT1222IS8

LT1222
500MHz, 3nV/√Hz, AV ≥ 10
Operational Amplifier
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FEATURES
DESCRIPTIO
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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 compensation, 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. The high gain and fast settling time make the circuit
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 compensation node can also be used to clamp the output swing.
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■
■
■
■
■
■
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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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APPLICATIO S
■
■
■
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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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■
The LT1222 is a member of a family of fast, high performance amplifiers that employ Linear Technology
Corporation’s advanced complementary bipolar processing. For unity-gain stable applications the LT1220 can be
used, and for gains of 4 or greater the LT1221 can be used.
TYPICAL APPLICATIO
AV = 10 with Output Clamping
AV = – 1, CC = 30pF Pulse Response
15V
3k
1N5711
VIN
3
+
1N4148
0.1μF
5
LT1222
2
1N5711
6
⎥ VOUT⎥ ≤ 0.5V
–
909Ω
100Ω
LT1222 • TA01
RF = RG = 1k
VS = ±15V
VIN = 100mV
f = 5MHz
LT1222 • TA02
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LT1222
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ABSOLUTE
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
LT1222C (Note 3) ................................... 0°C to 70°C
LT1222I ...............................................–40°C to 85°C
LT1222M (OBSOLETE) ............... – 55°C to 125°C
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
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PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
TOP VIEW
NULL
8
NULL 1
7 V+
6 VOUT
–IN 2
+IN 3
5 COMP
4
SPECIAL
ORDER
CONSULT
FACTORY
V–
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 175°C, θJA = 150°C/W
TOP VIEW
NULL 1
8
NULL
–IN 2
7
V+
+IN 3
6
VOUT
V– 4
5
COMP
S8 PACKAGE
N8 PACKAGE
8-LEAD PLASTIC DIP 8-LEAD PLASTIC SOIC
TJMAX = 150°C, θJA = 130°C/W (N)
TJMAX = 150°C, θJA = 190°C/W (S)
J8 PACKAGE
8-LEAD CERAMIC DIP
TJMAX = 175°C, θJA = 100°C/W (J)
OBSOLETE PACKAGE
Consider the N8 or S8 Packages for Alternate Source
ORDER PART
NUMBER
LT1222CN8
LT1222CS8
LT1222IS8
S8 PART MARKING
1222
1222I
ORDER PART
NUMBER
LT1222MJ8
OBSOLETE PACKAGE
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
VOS
IOS
IB
en
in
RIN
PARAMETER
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Resistance
CIN
Input Capacitance
Input Voltage Range (Positive)
Input Voltage Range (Negative)
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Swing
Output Current
Slew Rate
Full Power Bandwidth
Gain-Bandwidth
CMRR
PSRR
AVOL
VOUT
IOUT
SR
GBW
CONDITIONS
(Note 4)
f = 10kHz
f = 10kHz
VCM = ±12V
Differential
MIN
20
12
VCM = ±12V
VS = ±5V to ±15V
VOUT = ±10V, RL = 500Ω
RL = 500Ω
VOUT = ±12V
(Note 5)
10V Peak (Note 6)
f = 1MHz
100
98
100
12
24
150
TYP
100
100
100
3
2
45
12
2
14
– 13
120
110
200
13
26
200
3.2
500
MAX
300
300
300
– 12
UNITS
μV
nA
nA
nV/√Hz
pA/√Hz
MΩ
kΩ
pF
V
V
dB
dB
V/mV
±V
mA
V/μs
MHz
MHz
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LT1222
ELECTRICAL CHARACTERISTICS
SYMBOL
tr, tf
ts
PARAMETER
Rise Time, Fall Time
Overshoot
Propagation Delay
Settling Time
Differential Gain
Differential Phase
RO
IS
Output Resistance
Supply Current
VS = ±15V, TA = 25°C, VCM = 0V, unless otherwise specified.
CONDITIONS
AV = 10, 10% to 90%, 0.1V
AV = 10, 0.1V
AV = 10, 50% VIN to 50% VOUT, 0.1V
10V Step, 0.1%
10V Step, 0.01%
AV = 2, CC = 50pF, f = 3.58MHz, RL = 150Ω (Note 7)
AV = 10, CC = 0pF, f = 3.58MHz, RL = 1k (Note 7)
AV = 2, CC = 50pF, f = 3.58MHz, RL = 150Ω (Note 7)
AV = 10, CC = 0pF, f = 3.58MHz, RL = 1k (Note 7)
AV = 10, f = 1MHz
MIN
TYP
2.4
43
5.2
75
120
0.40
0.15
0.10
0.01
0.1
8
MAX
10.5
UNITS
ns
%
ns
ns
ns
%
%
DEG
DEG
Ω
mA
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
VOS
IOS
IB
CMRR
PSRR
AVOL
VOUT
IOUT
SR
IS
PARAMETER
Input Offset Voltage
Input VOS Drift
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Swing
Output Current
Slew Rate
Supply Current
CONDITIONS
(Note 4)
MIN
●
●
●
●
VCM = ±12V
VS = ±5V to ±15V
VOUT = ±10V, RL = 500Ω
RL = 500Ω
VOUT = ±12V
(Note 5)
●
●
●
●
●
●
100
98
100
12
24
150
●
TYP
100
5
100
100
120
110
200
13
26
200
8
MAX
600
400
400
11
UNITS
μV
μV/°C
nA
nA
dB
dB
V/mV
±V
mA
V/μs
mA
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
VOS
IOS
IB
CMRR
PSRR
AVOL
VOUT
PARAMETER
Input Offset Voltage
Input VOS Drift
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Swing
IOUT
Output Current
SR
IS
Slew Rate
Supply Current
CONDITIONS
(Note 4)
MIN
●
●
●
●
VCM = ±12V
VS = ±5V to ±15V
VOUT = ±10V, RL = 500Ω
RL = 500Ω
RL = 1k
VOUT = ±10V
VOUT = ±12V
(Note 5)
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.
Note 2: A heat sink may be required when the output is shorted indefinitely.
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
●
●
●
●
●
●
●
●
●
98
98
50
10
12
20
12
110
TYP
100
5
100
100
120
110
200
13
13
26
13
200
8
MAX
600
800
1000
11
UNITS
μV
μV/°C
nA
nA
dB
dB
V/mV
±V
±V
mA
mA
V/μs
mA
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 6: FPBW = SR/2πVP.
Note 7: Differential Gain and Phase are tested with five amps in series.
Attenuators of 1/Gain are used as loads.
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LT1222
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TYPICAL PERFORMANCE CHARACTERISTICS
Input Common Mode Range
vs Supply Voltage
Supply Current vs Supply Voltage
and Temperature
11
20
10
15
+VCM
10
–VCM
5
T = 125°C
9
T = 25°C
8
7
6
0
T = – 55°C
5
5
10
15
SUPPLY VOLTAGE (±V)
5
10
15
SUPPLY VOLTAGE (±V)
LT1222 • TPC01
400
±15V SUPPLIES
15
10
± 5V SUPPLIES
100
1k
LOAD RESISTANCE (Ω)
20
Open-Loop Gain
vs Resistive Load
120
TA = 25°C
110
200
IB+
100
IB–
0
–100
– 200
– 300
–500
–15
10k
VS = ±15V
100
VS = ±5V
90
80
0
5
–10
–5
10
INPUT COMMON MODE VOLTAGE (V)
70
15
LT1222 • TPC05
LT1222 • TPC06
100
INPUT VOLTAGE NOISE (nV/√Hz)
35
30
25
VS = ±15V
TA = 25°C
AV = 101
RS = 100k
100
10
in
10
1
en
1
100
125
LT1222 • TPC07
10
100
1k
10k
FREQUENCY (Hz)
0.1
100k
LT1222 • TPC08
120
INPUT CURRENT NOISE (pA/√Hz)
40
10k
Power Supply Rejection Ratio
vs Frequency
1000
VS = ±5V
45
100
1k
LOAD RESISTANCE (Ω)
10
Input Noise Spectral Density
50
OUTPUT SHORT-CIRCUIT CURRENT (mA)
5
10
15
SUPPLY VOLTAGE (±V)
LT1222 • TPC03
300
Output Short-Circuit Current
vs Temperature
0
25
75
50
TEMPERATURE (°C)
5
0
VS = ±15V
TA = 25°C
LT1222 • TPC04
20
– 50 – 25
– VSW
–400
0
10
10
20
OPEN-LOOP GAIN (dB)
INPUT BIAS CURRENT (nA)
OUTPUT VOLTAGE SWING (VP-P)
500
5
+VSW
Input Bias Current
vs Input Common Mode Voltage
TA = 25°C
ΔVOS = 30mV
20
15
LT1222 • TPC02
Output Voltage Swing
vs Resistive Load
25
TA = 25°C
RL = 500Ω
ΔVOS = 30mV
0
0
20
POWER SUPPLY REJECTION RATIO (dB)
0
30
MAGNITUDE OF OUTPUT VOLATGE (V)
TA = 25°C
ΔVOS = 0.5mV
SUPPLY CURRENT (mA)
MAGNITUDE OF INPUT VOLTAGE (V)
20
Output Voltage Swing
vs Supply Voltage
VS = ±15V
TA = 25°C
100
+PSRR
80
–PSRR
60
40
20
0
100
1k
10k 100k
1M
FREQUENCY (Hz)
10M
100M
LT1222 • TPC09
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LT1222
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TYPICAL PERFORMANCE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
Output Swing and Error
vs Settling Time (Noninverting)
VS = ±15V
TA = 25°C
6
6
60
40
10mV
4
2
0
–2
–4
10mV
–6
20
0
1k
10k
1M
100k
FREQUENCY (Hz)
10M
1mV
OUTPUT SWING (V)
80
1mV
–8
25
75
100
50
SETTLING TIME (ns)
60
40
40
20
VOLTAGE MAGNITUDE (dB)
0
26
C = 50pF
24
22
20
C=0
18
16
C = 500pF
0.1
0.01
C = 1000pF
1
10
FREQUENCY (MHz)
0.001
10k
100
550
525
SLEW RATE (V/μs)
250
450
425
225
VS = ±15V
AV = –10
CC = 0
(SR +) + (SR –)
SR =
2
200
175
150
125
LT1222 • TPC16
125
– 50 – 25
0
25
50
75
TEMPERATURE (°C)
100M
Total Harmonic Distortion
vs Frequency
275
VS = ±15V
475
1M
10M
FREQUENCY (Hz)
LT1222 • TPC15
Slew Rate vs Temperature
500
100k
LT1222 • TPC14
Gain-Bandwidth vs Temperature
100
1
14
10
– 20
100M
125
VS = ±15V
TA = 25°C
AV = 10
C = 100pF
LT1222 • TPC13
0
75
25
50
TEMPERATURE (°C)
75
100
50
SETTLING TIME (ns)
10
12
10M
25
LT1222 • TPC12
TOTAL HARMONIC DISTORTION AND NOISE (%)
VOLTAGE GAIN (dB)
60
PHASE MARGIN (DEG)
VS = ±5V
0
1mV
Closed-Loop Output Impedance
vs Frequency
VS = ±15V
TA = 25°C
AV = –10
28
80
20
GAIN-BANDWIDTH (MHz)
125
30
100
VS = ±15V
10mV
LT1222 • TPC11
VS = ±15V
400
– 50 – 25
–4
Frequency Response
vs Capacitive Load
120
TA = 25°C
0
100k
100
10k
1M
1k
FREQUENCY (Hz)
–2
–10
Voltage Gain and Phase
vs Frequency
VS = ±5V
0
–6
LT1222 • TPC10
100
2
–8
0
1mV
10mV
4
–10
100M
VS = ±15V
TA = 25°C
8
OUTPUT IMPEDANCE (Ω)
100
VS = ±15V
TA = 25°C
8
OUTPUT SWING (V)
COMMON MODE REJECTION RATIO (dB)
10
10
120
80
Output Swing and Error
vs Settling Time (Inverting)
100
125
LT1222 • TPC17
0.01
VS = ±15V
VO = 3VRMS
RL = 500Ω
0.001
AV = ±10
0.0001
10
100
1k
10k
FREQUENCY (Hz)
100k
LT1222 • TPC18
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LT1222
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TYPICAL PERFORMANCE CHARACTERISTICS
Small Signal, AV = 10
Large Signal, AV = 10,
CL = 10,000pF
Large Signal, AV = 10
RF = 909Ω VS = ±15V f = 5MHz
RG = 100Ω VIN = 20mV
RF = 909Ω VS = ±15V f = 2MHz
RG = 100Ω VIN = 2V
LT1222 • TPC19
LT1222 • TPC20
VS = ±15V f = 2MHz
RF = 1k
RG = 100Ω (75) VIN = 2V
LT1222 • TPC22
LT1222 • TPC23
VS = ±15V f = 500kHz
RF = 1k
RG = 100Ω (75) VIN = 15mV
LT1222 • TPC24
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VS = ±15V f = 5MHz
RF = 1k
RG = 100Ω (75) VIN = 20mV
LT1222 • TPC21
Small Signal, AV = – 10,
CL = 1,000pF
Large Signal, AV = – 10
Small Signal, AV = – 10
RF = 909Ω VS = ±15V f = 20kHz
RG = 100Ω VIN = 2V
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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 applications, 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.
Offset Nulling
V+
5k
1
3
+
0.1μF
8
7
LT1222
2
–
6
4
0.1μF
V–
LT1222 • AI01
Layout and Passive Components
The LT1222 amplifier is easy to apply and tolerant of less
than ideal layouts. For maximum performance (for example, fast settling time) use a ground plane, short lead
lengths and RF-quality bypass capacitors (0.01μF to 0.1μF).
For high drive current applications use low ESR bypass
capacitors (1μF to 10μF tantalum). Sockets should be
avoided when maximum frequency performance is required. 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 employed on the inputs of the LT1222 so the input bias current
and input offset current have identical specifications. For
this reason, matching the impedance on the inputs to
reduce bias current errors is not necessary.
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6
LT1222
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APPLICATIONS INFORMATION
Output Clamping
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 compensation node is approximately one diode drop above the
output and can source or sink 1.2mA. Back-to-back Schottky 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.
Capacitive Loading
The LT1222 is stable with capacitive loads. This is accomplished by sensing the load induced output pole and adding
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
response with 1000pF load. The large-signal response with
a 10,000pF load shows the output slew rate being limited
to 4V/μs by the short-circuit current. The LT1222 can drive
coaxial cable directly, but for best pulse fidelity a resistor of
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.
Compensation
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 amplifier frequency response may be adjusted by adding capacitance from Pin 5 to ground. The compensation capacitor
may be used to reduce overshoot, to allow the amplifier to
be used in lower noise gains, or simply to reduce bandwidth. Table 1 shows gain and compensation capacitor
vresus – 3dB bandwidth, maximum frequency peaking and
small-signal overshoot.
Table 1
AV
CC (pF)
f – 3dB (MHz)
Max Peaking (dB)
Overshoot (%)
–1
30
99
4.2
36
–1
50
70
0.9
13
–1
82
32
0
0
–1
150
13
0
0
5
10
140
3.8
35
5
20
100
0
5
5
30
34
0
1
5
50
15
0
0
10
0
150
9.5
45
10
5
111
0.2
10
10
10
40
0
2
10
20
17
0
0
20
0
82
0.1
10
20
5
24
0
0
20
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)
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.
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LT1222
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TYPICAL APPLICATIONS N
VOS Null Loop
150k
Two Op Amp Instrumemtation Amplifier
R5
220Ω
150k
1
+
VIN
R1
10k
8
VOUT
AV = 1001
LT1222
R2
1k
–
R3
1k
25k
LT1220
10k
–
100pF
10k
25Ω
R4
10k
+
–
VOUT
LT1222
+
VIN
+
GAIN = [R4/R3][1 + (1/2)(R2/R1 + R3/R4) + (R2 + R3)/R5] = 102
TRIM R5 FOR GAIN
TRIM R1 FOR COMMON MODE REJECTION
BW = 3MHz
LT1222 • TA04
–
LT1097
100pF
LT1222 • TA03
+
W
W
SI PLIFIED SCHE ATIC
V+ 7
NULL
1
8
BIAS 2
BIAS 1
COMP 5
6 OUT
+IN 3
2 –IN
V– 4
LT1222 • SS
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LT1222
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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
0.305 – 0.335
(7.747 – 8.509)
0.027 – 0.045
(0.686 – 1.143)
45°TYP
0.040
(1.016)
MAX
0.050
(1.270)
MAX
SEATING
PLANE
0.165 – 0.185
(4.191 – 4.699)
GAUGE
PLANE
0.010 – 0.045*
(0.254 – 1.143)
PIN 1
0.028 – 0.034
(0.711 – 0.864)
0.200
(5.080)
TYP
REFERENCE
PLANE
0.500 – 0.750
(12.700 – 19.050)
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)
CORNER LEADS OPTION
(4 PLCS)
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
0.005
(0.127)
MIN
0.405
(10.287)
MAX
8
7
6
5
0.025
(0.635)
RAD TYP
0.220 – 0.310
(5.588 – 7.874)
1
2
0.300 BSC
(0.762 BSC)
3
4
0.200
(5.080)
MAX
0.015 – 0.060
(0.381 – 1.524)
0.008 – 0.018
(0.203 – 0.457)
0° – 15°
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
0.045 – 0.065
(1.143 – 1.651)
0.014 – 0.026
(0.360 – 0.660)
0.100
(2.54)
BSC
0.125
3.175
MIN
J8 1298
OBSOLETE PACKAGES
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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
1
2
3
4
.255 ± .015*
(6.477 ± 0.381)
.300 – .325
(7.620 – 8.255)
.008 – .015
(0.203 – 0.381)
(
+.035
.325 –.015
8.255
+0.889
–0.381
)
.045 – .065
(1.143 – 1.651)
.130 ± .005
(3.302 ± 0.127)
.065
(1.651)
TYP
.100
(2.54)
BSC
.120
(3.048) .020
MIN (0.508)
MIN
.018 ± .003
(0.457 ± 0.076)
N8 1002
NOTE:
1. DIMENSIONS ARE
INCHES
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)
NOTE 3
.045 ±.005
.050 BSC
8
.245
MIN
7
6
5
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
1
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
× 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
3
4
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
2
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(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)
.050
(1.270)
BSC
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LT1222
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1220
45MHz, 250V/μs Amplifier
Unity Gain Stable Version of the LT1222
LT1221
150MHz, 250V/μs Amplifier
AV ≥ 4 Version of the LT1222
1222fc
12
Linear Technology Corporation
LT 0507 REV C • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1992