LT1208/LT1209
Dual and Quad
45MHz, 400V/µs Op Amps
FEATURES
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
45MHz Gain-Bandwidth
400V/µs Slew Rate
Unity-Gain Stable
7V/mV DC Gain, R
L
= 500Ω
3mV Maximum Input Offset Voltage
±12V
Minimum Output Swing into 500Ω
Wide Supply Range:
±2.5V
to
±15V
7mA Supply Current per Amplifier
90ns Settling Time to 0.1%, 10V Step
Drives All Capacitive Loads
APPLICATI
s
s
s
s
s
s
S
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 500Ω load to
±12V
with
±15V
supplies and a 150Ω 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.
Wideband Amplifiers
Buffers
Active Filters
Video and RF Amplification
Cable Drivers
Data Acquisition Systems
TYPICAL APPLICATI
1MHz, 4th Order Butterworth Filter
909Ω
1.1k
47pF
V
IN
220pF
470pF
+
–
+
–
909Ω
2.67k
1/2
LT1208
1.1k
2.21k
22pF
1/2
LT1208
V
OUT
1208/09 TA01
U
Inverter Pulse Response
1208/09 TA02
UO
UO
1
LT1208/LT1209
ABSOLUTE
AXI U
RATI GS
Maximum Junction Temperature
Plastic Package ............................................. 150°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
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
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
B
A
8
7
6
5
V
+
OUT B
–IN B
+IN B
ORDER PART
NUMBER
LT1208CN8
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 150°C,
θ
JA
= 100°C/W
CONTACT FACTORY FOR
MILITARY/883B PARTS
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
+
4
+IN B 5
–IN B 6
OUT B 7
B
C
A
D
14 OUT D
13 –IN D
12 +IN D
11 V
–
10 +IN C
9
8
–IN C
OUT C
ORDER PART
NUMBER
LT1209CN
N PACKAGE
14-LEAD PLASTIC DIP
T
JMAX
= 150°C,
θ
JA
= 70°C/W
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
V
S
=
±15V,
T
A
= 25°C, R
L
= 1k, V
CM
= 0V, unless otherwise noted.
MIN
q
CONDITIONS
V
S
=
±5V
(Note 2)
0°C to 70°C
V
S
=
±15V
(Note 2)
0°C to 70°C
V
S
=
±5V
and V
S
=
±15V
0°C to 70°C
V
S
=
±5V
and V
S
=
±15V
0°C to 70°C
f = 10kHz
f = 10kHz
I
OS
I
B
e
n
i
n
Input V
OS
Drift
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
2
U
U
W
W W
U
W
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
B
5
+IN B
A
6
8
7
V
+
OUT B
–IN B
ORDER PART
NUMBER
LT1208CS8
S8 PART MARKING
1208
ORDER PART
NUMBER
LT1209CS
S8 PACKAGE
8-LEAD PLASTIC SOIC
T
JMAX
= 150°C,
θ
JA
= 150°C/W
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
+
4
+IN B 5
–IN B 6
OUT B 7
NC 8
B
C
A
D
16 OUT D
15 –IN D
14 +IN D
13 V
–
12 +IN C
11 –IN C
10 OUT C
9
NC
S PACKAGE
16-LEAD PLASTIC SOIC
T
JMAX
= 150°C,
θ
JA
= 100°C/W
TYP
0.5
1.0
MAX
3.0
4.0
5.0
6.0
400
600
8
9
UNITS
mV
mV
mV
mV
µV/°C
nA
nA
µA
µA
nV/√Hz
pA/√Hz
q
25
100
q
4
q
22
1.1
LT1208/LT1209
ELECTRICAL CHARACTERISTICS
SYMBOL
R
IN
C
IN
CMRR
PSRR
PARAMETER
Input Resistance
Input Capacitance
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Input Voltage Range
A
VOL
Large-Signal Voltage Gain
CONDITIONS
V
CM
=
±12V
Differential
V
S
=
±15V,
T
A
= 25°C, R
L
= 1k, V
CM
= 0V, unless otherwise noted.
MIN
20
TYP
40
250
2
98
84
±13
±3
7
7
3
13.3
3.3
40
40
400
250
6.4
45
34
5
7
30
20
5
7
90
1.30
0.09
1.8
0.1
2.5
–100
7
q
MAX
UNITS
MΩ
kΩ
pF
dB
dB
dB
dB
V
V
V/mV
V/mV
V/mV
V/mV
V/mV
±V
±V
mA
mA
V/µs
V/µs
V/µs
V/µs
MHz
MHz
MHz
ns
ns
%
%
ns
ns
ns
%
%
Deg
Deg
Ω
dB
mA
mA
V
OUT
I
OUT
SR
Output Swing
Output Current
Slew Rate
GBW
t
r
, t
f
Full Power Bandwidth
Gain-Bandwidth
Rise Time, Fall Time
Overshoot
Propagation Delay
t
s
Settling Time
Differential Gain
Differential Phase
R
O
I
S
Output Resistance
Crosstalk
Supply Current
V
S
=
±15V,
V
CM
=
±12V;
V
S
=
±5V,
V
CM
=
±2.5V,
0°C to 70°C
V
S
=
±5V
to
±15V
0°C to 70°C
V
S
=
±15V
V
S
=
±5V
V
S
=
±15V,
V
OUT
=
±10V,
R
L
= 500Ω
0°C to 70°C
V
S
=
±
5V, V
OUT
=
±2.5V,
R
L
= 500Ω
0°C to 70°C
V
S
=
±
5V, V
OUT
=
±2.5V,
R
L
= 150Ω
V
S
=
±15V,
R
L
= 500Ω, 0°C to 70°C
V
S
=
±5V,
R
L
= 150Ω, 0°C to 70°C
V
S
=
±15V,
V
OUT
=
±12V,
0°C to 70°C
V
S
=
±
5V, V
OUT
=
±
3V, 0°C to 70°C
V
S
=
±15V,
A
VCL
= – 2, (Note 3)
0°C to 70°C
V
S
=
±5V,
A
VCL
= – 2, (Note 3)
0°C to 70°C
10V Peak, (Note 4)
V
S
=
±15V,
f = 1MHz
V
S
=
±5V,
f = 1MHz
V
S
=
±15V,
A
VCL
= 1, 10% to 90%, 0.1V
V
S
=
±
5V, A
VCL
= 1, 10% to 90%, 0.1V
V
S
=
±
15V, A
VCL
= 1, 0.1V
V
S
=
±
5V, A
VCL
= 1, 0.1V
V
S
=
±
15V, 50% V
IN
to 50%V
OUT
V
S
=
±
5V, 50% V
IN
to 50%V
OUT
V
S
=
±
15V, 10V Step, V
S
=
±5V,
5V Step, 0.1%
f = 3.58MHz, R
L
= 150Ω
f = 3.58MHz, R
L
= 1k
f = 3.58MHz, R
L
= 150Ω
f = 3.58MHz, R
L
= 1k
A
VCL
= 1, f = 1MHz
V
OUT
=
±10V,
R
L
= 500Ω
Each Amplifier, V
S
=
±5V
and V
S
=
±15V
0°C to 70°C
q
q
q
q
q
q
q
q
q
q
86
83
76
75
±12
±2.5
3.3
2.5
2.5
2.0
12.0
3.0
24
20
250
200
150
130
– 94
9
10.5
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.
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/2πV
P
.
3
LT1208/LT1209
TYPICAL PERFOR A CE CHARACTERISTICS
Input Common-Mode Range vs
Supply Voltage
20
12
T
A
= 25°C
∆V
OS
< 1mV
SUPPLY CURRENT (mA)
MAGNITUDE OF INPUT VOLTAGE (V)
OUTPUT VOLTAGE SWING (V)
15
10
+V
CM
5
–V
CM
0
0
5
10
15
SUPPLY VOLTAGE (±V)
20
1208/09 G01
Output Voltage Swing vs
Resistive Load
30
OUTPUT VOLTAGE SWING (V
P-P
)
25
20
15
10
5
0
10
T
A
= 25°C
∆V
OS
= 30mV
INPUT BIAS CURRENT (µA)
V
S
= ±15V
OPEN-LOOP GAIN (dB)
V
S
= ±5V
100
1k
LOAD RESISTANCE (Ω)
Input Bias Current vs Temperature
5.00
4.75
V
S
= ±15V
I
B+
+ I
B–
I
B
=
2
OUTPUT SHORT-CIRCUIT CURRENT (mA)
INPUT VOLTAGE NOISE (nV/√Hz)
INPUT BIAS CURRENT (µA)
4.50
4.25
4.00
3.75
3.50
–50 –25
25
75
0
50
TEMPERATURE (°C)
4
U W
10k
1208/09 G04
Supply Current vs Supply Voltage
and Temperature
20
125°C
Output Voltage Swing vs
Supply Voltage
T
A
= 25°C
R
L
= 500Ω
∆V
OS
= 30mV
15
+V
SW
10
–V
SW
5
10
8
6
25°C
–55°C
4
2
0
0
5
10
15
SUPPLY VOLTAGE (±V)
20
1208/09 G02
0
0
5
10
15
SUPPLY VOLTAGE (±V)
20
1208/09 G03
Input Bias Current vs Input
Common-Mode Voltage
5.0
V
S
= ±15V
T
A
= 25°C
I
+
+ I
B –
I
B
=
B
2
Open-Loop Gain vs
Resistive Load
100
T
A
= 25°C
90
4.5
80
V
S
= ±15V
4.0
70
V
S
= ±5V
3.5
60
3.0
–15
50
–10
–5
0
5
10
INPUT COMMON-MODE VOLTAGE (V)
15
10
100
1k
LOAD RESISTANCE (Ω)
10k
1208/09 G06
1208/09 G05
Output Short-Circuit Current
vs Temperature
55
V
S
= ±5V
50
45
40
SOURCE
35
30
25
–50
SINK
Input Noise Spectral Density
10000
V
S
= ±15V
T
A
= 25°C
A
V
= 101
R
S
= 100k
10
100
INPUT CURRENT NOISE (pA/√Hz)
1000
i
n
100
e
n
1
100
125
–25
25
75
0
50
TEMPERATURE (°C)
100
125
10
10
100
1k
10k
FREQUENCY (Hz)
0.1
100k
1208/09 G09
1208/09 G07
1208/09 G08
LT1208/LT1209
TYPICAL PERFOR A CE CHARACTERISTICS
Crosstalk vs Frequency
–20
–30
–40
COMMON-MODE REJECTION RATIO (dB)
POWER SUPPLY REJECTION RATIO (dB)
T
A
= 25°C
V
IN
= 0dBm
A
V
= 1
CROSSTALK (dB)
–50
–60
–70
–80
–90
–100
–110
–120
100k
V
S
= ±5V
R
L
= 500Ω
V
S
= ±15V
R
L
= 1k
1M
10M
FREQUENCY (Hz)
Voltage Gain and Phase vs
Frequency
80
100
10
8
VOLTAGE GAIN (dB)
OUTPUT SWING (V)
V
S
= ±15V
40
60
VOLTAGE MAGNITUDE (dB)
60
V
S
= ±5V
20
V
S
= ±5V
V
S
= ±15V
0
T
A
= 25°C
–20
100
1k
1M
10k 100k
FREQUENCY (Hz)
10M
Closed-Loop Output Impedance
vs Frequency
100
V
S
= ±15V
T
A
= 25°C
A
V
= +1
OUTPUT IMPEDANCE (Ω)
10
GAIN-BANDWIDTH (MHz)
SLEW RATE (V/µs)
1
0.1
0.01
10k
100k
1M
10M
FREQUENCY (Hz)
U W
1208/09 G10
Power Supply Rejection Ratio
vs Frequency
100
V
S
= ±15V
T
A
= 25°C
80
+PSRR
60
–PSRR
40
120
100
80
60
40
20
0
Common-Mode Rejection Ratio
vs Frequency
V
S
= ±15V
T
A
= 25°C
20
100M
0
100
1k
10k 100k
1M
FREQUENCY (Hz)
10M
100M
1k
10k
100k
1M
FREQUENCY (Hz)
10M
100M
1208/09 G11
1208/09 G12
Output Swing vs Settling Time
10
8
6
4
2
0
–2
–4
–6
–8
–10
0
25
75
100
50
SETTLING TIME (ns)
125
1208/09 G14
Frequency Response vs
Capacitive Load
V
S
= ±15V
T
A
= 25°C
A
V
= –1
C = 100pF
C = 50pF
80
PHASE MARGIN (DEG)
6
4
2
0
–2
–4
–6
–8
V
S
= ±15V
T
A
= 25°C
10mV SETTLING
A
V
= 1
A
V
= –1
A
V
= 1
A
V
= –1
40
C=0
C = 500pF
C = 1000pF
20
0
100M
–10
1M
10M
FREQUENCY (Hz)
100M
1208/09 G15
1208/09 B13
Gain-Bandwidth vs Temperature
48
V
S
= ±15V
47
46
45
44
43
42
–50
450
400
500
Slew Rate vs Temperature
V
S
= ±15V
A
V
= –2
–SR
+SR
350
300
250
200
–50
100M
1208/09 G16
–25
25
75
0
50
TEMPERATURE (°C)
100
125
–25
25
75
0
50
TEMPERATURE (°C)
100
125
1208/09 G17
1208/09 G18
5
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