1
LT1208/LT1209
Dual and Quad
45MHz, 400V/
s Op Amps
s
45MHz Gain-Bandwidth
s
400V/
s Slew Rate
s
Unity-Gain Stable
s
7V/mV DC Gain, R
L
= 500
s
3mV Maximum Input Offset Voltage
s
12V Minimum Output Swing into 500
s
Wide Supply Range:
2.5V to
15V
s
7mA Supply Current per Amplifier
s
90ns Settling Time to 0.1%, 10V Step
s
Drives All Capacitive Loads
D
U
ESCRIPTIO
S
FEATURE
The LT1208/LT1209 are dual and quad very high speed
operational amplifiers with excellent DC performance. The
LT1208/LT1209 feature reduced input offset voltage and
higher DC gain than devices with comparable bandwidth
and slew rate. Each amplifier is a single gain stage with
outstanding settling characteristics. The fast settling time
makes the circuit an ideal choice for data acquisition
systems. Each output is capable of driving a 500
load to
12V with
15V supplies and a 150
load to
3V on
5V
supplies. The amplifiers are also capable of driving large
capacitive loads which make them useful in buffer or cable
driver applications.
The LT1208/LT1209 are members of a family of fast, high
performance amplifiers that employ Linear Technology
Corporation's advanced bipolar complementary
processing.
U
A
O
PPLICATI
TYPICAL
U
S
A
O
PPLICATI
s
Wideband Amplifiers
s
Buffers
s
Active Filters
s
Video and RF Amplification
s
Cable Drivers
s
Data Acquisition Systems
1MHz, 4th Order Butterworth Filter
1208/09 TA02
+
1/2
LT1208
2.67k
909
47pF
220pF
V
IN
909
+
1/2
LT1208
2.21k
1.1k
22pF
470pF
1.1k
V
OUT
1208/09 TA01
Inverter Pulse Response
LT1208/LT1209
2
A
U
G
W
A
W
U
W
A
R
BSOLUTE
XI
TI
S
Total Supply Voltage (V
+
to V
) .............................. 36V
Differential Input Voltage ........................................
6V
Input Voltage ...........................................................
V
S
Output Short-Circuit Duration (Note 1) ........... Indefinite
Operating Temperature Range
LT1208C/LT1209C .......................... 40
C to 85
C
Maximum Junction Temperature
Plastic Package ............................................. 150
C
Storage Temperature Range ................ 65
C to 150
C
Lead Temperature (Soldering, 10 sec) ................. 300
C
W
U
U
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1208CS8
S8 PART MARKING
1208
1
2
3
4
8
7
6
5
TOP VIEW
OUT A
IN A
+IN A
V
V
+
OUT B
IN B
+IN B
N8 PACKAGE
8-LEAD PLASTIC DIP
A
B
T
JMAX
= 150
C,
JA
= 150
C/W
T
JMAX
= 150
C,
JA
= 100
C/W
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1209CS
LT1209CN
T
JMAX
= 150
C,
JA
= 100
C/W
T
JMAX
= 150
C,
JA
= 70
C/W
ELECTRICAL C
C
HARA TERISTICS
V
S
=
15V, T
A
= 25
C, R
L
= 1k, V
CM
= 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
OS
Input Offset Voltage
V
S
=
5V (Note 2)
0.5
3.0
mV
0
C to 70
C
q
4.0
mV
V
S
=
15V (Note 2)
1.0
5.0
mV
0
C to 70
C
q
6.0
mV
Input V
OS
Drift
25
V/
C
I
OS
Input Offset Current
V
S
=
5V and V
S
=
15V
100
400
nA
0
C to 70
C
q
600
nA
I
B
Input Bias Current
V
S
=
5V and V
S
=
15V
4
8
A
0
C to 70
C
q
9
A
e
n
Input Noise Voltage
f = 10kHz
22
nV/
Hz
i
n
Input Noise Current
f = 10kHz
1.1
pA/
Hz
1
2
3
4
5
6
7
TOP VIEW
N PACKAGE
14-LEAD PLASTIC DIP
14
13
12
11
10
9
8
A
D
OUT A
IN A
+IN A
V
+
+IN B
IN B
OUT B
OUT D
IN D
+IN D
V
+IN C
IN C
OUT C
C
B
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SOIC
A
B
OUT A
IN A
+IN A
V
V
+
OUT B
IN B
+IN B
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SOIC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A
D
OUT A
IN A
+IN A
V
+
+IN B
IN B
OUT B
NC
OUT D
IN D
+IN D
V
+IN C
IN C
OUT C
NC
C
B
LT1208CN8
CONTACT FACTORY FOR
MILITARY/883B PARTS
3
LT1208/LT1209
ELECTRICAL C
C
HARA TERISTICS
V
S
=
15V, T
A
= 25
C, R
L
= 1k, V
CM
= 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
R
IN
Input Resistance
V
CM
=
12V
20
40
M
Differential
250
k
C
IN
Input Capacitance
2
pF
CMRR
Common-Mode Rejection Ratio
V
S
=
15V, V
CM
=
12V; V
S
=
5V,
86
98
dB
V
CM
=
2.5V, 0
C to 70
C
q
83
dB
PSRR
Power Supply Rejection Ratio
V
S
=
5V to
15V
76
84
dB
0
C to 70
C
q
75
dB
Input Voltage Range
V
S
=
15V
12
13
V
V
S
=
5V
2.5
3
V
A
VOL
Large-Signal Voltage Gain
V
S
=
15V, V
OUT
=
10V, R
L
= 500
3.3
7
V/mV
0
C to 70
C
q
2.5
V/mV
V
S
=
5V, V
OUT
=
2.5V, R
L
= 500
2.5
7
V/mV
0
C to 70
C
q
2.0
V/mV
V
S
=
5V, V
OUT
=
2.5V, R
L
= 150
3
V/mV
V
OUT
Output Swing
V
S
=
15V, R
L
= 500
, 0
C to 70
C
q
12.0
13.3
V
V
S
=
5V, R
L
= 150
, 0
C to 70
C
q
3.0
3.3
V
I
OUT
Output Current
V
S
=
15V, V
OUT
=
12V, 0
C to 70
C
q
24
40
mA
V
S
=
5V, V
OUT
=
3V, 0
C to 70
C
q
20
40
mA
SR
Slew Rate
V
S
=
15V, A
VCL
= 2, (Note 3)
250
400
V/
s
0
C to 70
C
q
200
V/
s
V
S
=
5V, A
VCL
= 2, (Note 3)
150
250
V/
s
0
C to 70
C
q
130
V/
s
Full Power Bandwidth
10V Peak, (Note 4)
6.4
MHz
GBW
Gain-Bandwidth
V
S
=
15V, f = 1MHz
45
MHz
V
S
=
5V, f = 1MHz
34
MHz
t
r
, t
f
Rise Time, Fall Time
V
S
=
15V, A
VCL
= 1, 10% to 90%, 0.1V
5
ns
V
S
=
5V, A
VCL
= 1, 10% to 90%, 0.1V
7
ns
Overshoot
V
S
=
15V, A
VCL
= 1, 0.1V
30
%
V
S
=
5V, A
VCL
= 1, 0.1V
20
%
Propagation Delay
V
S
=
15V, 50% V
IN
to 50%V
OUT
5
ns
V
S
=
5V, 50% V
IN
to 50%V
OUT
7
ns
t
s
Settling Time
V
S
=
15V, 10V Step, V
S
=
5V,
90
ns
5V Step, 0.1%
Differential Gain
f = 3.58MHz, R
L
= 150
1.30
%
f = 3.58MHz, R
L
= 1k
0.09
%
Differential Phase
f = 3.58MHz, R
L
= 150
1.8
Deg
f = 3.58MHz, R
L
= 1k
0.1
Deg
R
O
Output Resistance
A
VCL
= 1, f = 1MHz
2.5
Crosstalk
V
OUT
=
10V, R
L
= 500
100
94
dB
I
S
Supply Current
Each Amplifier, V
S
=
5V and V
S
=
15V
7
9
mA
0
C to 70
C
q
10.5
mA
Note 3: Slew rate is measured in a gain of 2. For
15V supplies measure
between
10V on the output with
6V on the input. For
5V supplies
measure between
2V on the output with
1.75V on the input.
Note 4: Full power bandwidth is calculated from the slew rate
measurement: FPBW = SR/2
V
P
.
The
q
denotes the specifications which apply over the full operating
temperature range.
Note 1: A heat sink may be required to keep the junction temperature
below absolute maximum when the output is shorted indefinitely.
Note 2: Input offset voltage is tested with automated test equipment and is
exclusive of warm-up drift.
LT1208/LT1209
4
C
C
HARA TERISTICS
U
W
A
TYPICAL PERFOR
CE
Input Common-Mode Range vs
Supply Current vs Supply Voltage
Output Voltage Swing vs
Supply Voltage
and Temperature
Supply Voltage
SUPPLY VOLTAGE (V)
0
0
MAGNITUDE OF INPUT VOLTAGE (V)
5
10
15
20
5
10
15
20
1208/09 G01
T
A
= 25C
V
OS
< 1mV
+V
CM
V
CM
SUPPLY VOLTAGE (V)
0
0
OUTPUT VOLTAGE SWING (V)
5
10
15
20
5
10
15
20
1208/09 G03
T
A
= 25C
R
L
= 500
V
OS
= 30mV
+V
SW
V
SW
Output Voltage Swing vs
Input Bias Current vs Input
Open-Loop Gain vs
Resistive Load
Common-Mode Voltage
Resistive Load
LOAD RESISTANCE (
)
10
0
OUTPUT VOLTAGE SWING (V
P-P
)
10
20
25
30
100
1k
10k
1208/09 G04
15
5
T
A
= 25C
V
OS
= 30mV
V
S
= 15V
V
S
= 5V
INPUT COMMON-MODE VOLTAGE (V)
15
3.0
INPUT BIAS CURRENT (
A)
3.5
4.0
4.5
5.0
10
0
10
15
1208/09 G05
5
5
V
S
= 15V
T
A
= 25C
I
B
+
+ I
B
2
I
B
=
LOAD RESISTANCE (
)
10
50
OPEN-LOOP GAIN (dB)
80
90
100
100
1k
10k
1208/09 G06
70
60
T
A
= 25C
V
S
= 15V
V
S
= 5V
TEMPERATURE (C)
50
3.50
INPUT BIAS CURRENT (
A)
4.00
4.25
4.75
5.00
25
25
75
125
1208/09 G07
100
50
0
3.75
4.50
V
S
= 15V
I
B
+
+ I
B
2
I
B
=
FREQUENCY (Hz)
10
100
10
1
0.1
100
1k
10k
100k
1208/09 G09
INPUT CURRENT NOISE (pA/
Hz)
INPUT VOLTAGE NOISE (nV/
Hz)
10000
1000
100
10
V
S
= 15V
T
A
= 25C
A
V
= 101
R
S
= 100k
i
n
e
n
Output Short-Circuit Current
Input Bias Current vs Temperature
vs Temperature
Input Noise Spectral Density
TEMPERATURE (C)
50
25
OUTPUT SHORT-CIRCUIT CURRENT (mA)
35
40
50
55
25
25
75
125
1208/09 G08
100
50
0
30
45
V
S
= 5V
SINK
SOURCE
SUPPLY VOLTAGE (V)
0
SUPPLY CURRENT (mA)
12
10
8
6
4
2
0
5
10
15
20
1208/09 G02
25C
55C
125C
5
LT1208/LT1209
C
C
HARA TERISTICS
U
W
A
TYPICAL PERFOR
CE
FREQUENCY (Hz)
100k
CROSSTALK (dB)
1M
10M
100M
1208/09 G10
20
30
40
50
60
70
80
90
100
110
120
T
A
= 25C
V
IN
= 0dBm
A
V
= 1
V
S
= 5V
R
L
= 500
V
S
= 15V
R
L
= 1k
Power Supply Rejection Ratio
Common-Mode Rejection Ratio
Crosstalk vs Frequency
vs Frequency
vs Frequency
FREQUENCY (Hz)
100
0
POWER SUPPLY REJECTION RATIO (dB)
40
80
100
1k
100k
1M
100M
10M
10k
20
60
V
S
= 15V
T
A
= 25C
+PSRR
PSRR
1208/09 G11
FREQUENCY (Hz)
0
COMMON-MODE REJECTION RATIO (dB)
40
100
120
1k
100k
1M
100M
1208/09 G12
10M
10k
20
60
80
V
S
= 15V
T
A
= 25C
Voltage Gain and Phase vs
Frequency Response vs
Frequency
Output Swing vs Settling Time
Capacitive Load
FREQUENCY (Hz)
100
20
VOLTAGE GAIN (dB)
20
60
80
1k
100k
1M
100M
1208/09 B13
10M
10k
0
40
V
S
= 5V
T
A
= 25C
PHASE MARGIN (DEG)
0
40
80
100
20
60
V
S
= 15V
V
S
= 5V
V
S
= 15V
FREQUENCY (Hz)
1M
10
VOLTAGE MAGNITUDE (dB)
6
4
0
4
6
10
10M
100M
1208/09 G15
V
S
= 15V
T
A
= 25C
A
V
= 1
8
2
2
8
C = 1000pF
C = 0
C = 50pF
C = 100pF
C = 500pF
SETTLING TIME (ns)
0
OUTPUT SWING (V)
10
8
6
4
2
0
2
4
6
8
10
100
1208/09 G14
25
50
75
125
V
S
= 15V
T
A
= 25C
10mV SETTLING
A
V
= 1
A
V
= 1
A
V
= 1
A
V
= 1
Closed-Loop Output Impedance
vs Frequency
Gain-Bandwidth vs Temperature
Slew Rate vs Temperature
FREQUENCY (Hz)
10k
0.01
OUTPUT IMPEDANCE (
)
0.1
1
10
100
100k
1M
10M
100M
1208/09 G16
V
S
= 15V
T
A
= 25C
A
V
= +1
TEMPERATURE (C)
50
200
SLEW RATE (V/
s)
300
350
450
500
25
25
75
125
1208/09 G18
100
50
0
250
400
V
S
= 15V
A
V
= 2
SR
+SR
TEMPERATURE (C)
50
42
GAIN-BANDWIDTH (MHz)
44
45
47
48
25
25
75
125
1208/09 G17
100
50
0
43
46
V
S
= 15V
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