LT1220
45MHz, 250V/µs
Operational Amplifier
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Gain-Bandwidth: 45MHz
Unity-Gain Stable
Slew Rate: 250V/µs
C-Load
TM
Op Amp Drives Capacitive Loads
Maximum Input Offset Voltage: 1mV
Maximum Input Bias Current: 300nA
Maximum Input Offset Current: 300nA
Minimum Output Swing Into 500Ω:
±12V
Minimum DC Gain: 20V/mV, R
L
= 500Ω
Settling Time to 0.1%: 75ns, 10V Step
Settling Time to 0.01%: 95ns, 10V Step
Differential Gain: 0.1%, A
V
= 2, R
L
= 150Ω
Differential Phase: 0.2°, A
V
= 2, R
L
= 150Ω
The LT
®
1220 is a high speed operational amplifier with
superior DC performance. The LT1220 features reduced
input offset voltage, lower input bias currents 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 pre-
cision 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 large
capacitive loads which makes it useful in buffer or cable
driver applications.
The LT1220 is a member of a family of fast, high perfor-
mance amplifiers that employ Linear Technology
Corporation’s advanced complementary bipolar process-
ing. For applications with gains of 4 or greater the LT1221
can be used, and for gains of 10 or greater the LT1222 can
be used for increased bandwidth.
, LTC and LT are registered trademarks of Linear Technology Corporation
C-Load is a trademark of Linear Technology Corporation
APPLICATIO S
s
s
s
s
s
s
Wideband Amplifiers
Buffers
Active Filters
Video and RF Amplification
Cable Drivers
8-, 10-, 12-Bit Data Acquisition Systems
TYPICAL APPLICATIO
R5
220Ω
R1
10k
R2
1k
Two Op Amp Instrumentation Amplifier
R4
10k
Inverter Pulse Response
LT1220
–
V
IN
+
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 = 450kHz
LT1220 • TA01
+
–
R3
1k
LT1220
V
OUT
R
F
= R
G
= 1k
V
S
=
±15V
V
IN
= 20V
f = 2MHz
U
LT1220 • TA02
U
U
+
–
1
LT1220
ABSOLUTE
AXI U
RATI GS
(Note 1)
Operating Temperature Range
LT1220C ........................................... – 40°C TO 85°C
LT1220M
(OBSOLETE) ...............
– 55°C to 150°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
Total Supply Voltage (V
+
to V
–
) .............................. 36V
Differential Input Voltage ........................................
±6V
Input Voltage ..........................................................
±V
S
Output Short-Circuit Duration (Note 2) ........... Indefinite
Specified Temperature Range
LT1220C (Note 3) ................................... 0°C to 70°C
LT1220M
(OBSOLETE) ...............
– 55°C to 125°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
NULL
8
NULL 1
–IN 2
+IN 3
7 V
+
6 V
OUT
5 NC
4
ORDER PART
NUMBER
LT1220CH
LT1220MH
V
–
H PACKAGE
8-LEAD TO-5 METAL CAN
T
JMAX
= 175°C,
θ
JA
= 150°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
SYMBOL
V
OS
I
OS
I
B
e
n
i
n
R
IN
C
IN
PARAMETER
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Current
Input Resistance
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
T
A
= 25°C, V
S
=
±15V,
V
CM
= 0V, unless otherwise specified.
MIN
TYP
0.5
100
100
17
2
45
150
2
14
– 13
114
94
50
13
26
250
4
45
MAX
1
300
300
UNITS
mV
nA
nA
nV/√Hz
pA/√Hz
MΩ
kΩ
pF
V
V
dB
dB
V/mV
±V
mA
V/µs
MHz
MHz
CONDITIONS
(Note 4)
f = 10kHz
f = 10kHz
V
CM
=
±12V
Differential
CMRR
PSRR
A
VOL
V
OUT
I
OUT
SR
GBW
V
CM
=
±12V
V
S
=
±5V
to
±15V
V
OUT
=
±10V,
R
L
= 500Ω
R
L
= 500Ω
V
OUT
=
±12V
(Note 5)
10V Peak (Note 6)
f = 1MHz
2
U
U
W
W W
U
W
TOP VIEW
NULL 1
–IN 2
+IN 3
V
–
4
8
7
6
5
NULL
V
+
V
OUT
NC
ORDER PART
NUMBER
LT1220CN8
LT1220CS8
S8 PART MARKING
1220
S8 PACKAGE
N8 PACKAGE
8-LEAD PLASTIC DIP 8-LEAD PLASTIC SOIC
T
JMAX
= 150°C,
θ
JA
= 130°C/W (N)
T
JMAX
= 150°C,
θ
JA
= 190°C/W (S)
J8 PACKAGE
8-LEAD CERAMIC DIP
T
JMAX
= 175°C,
θ
JA
= 100°C/W (J)
ORDER PART
NUMBER
OBSOLETE PACKAGE
LT1220MJ8
Consider the N8 Package for Alternate Source
20
12
92
90
20
12
24
200
– 12
LT1220
ELECTRICAL CHARACTERISTICS
SYMBOL
t
r
, t
f
PARAMETER
Rise Time, Fall Time
Overshoot
Propagation Delay
Settling Time
Differential Gain
Differential Phase
R
O
I
S
Output Resistance
Supply Current
V
S
=
±15V,
T
A
= 25°C, V
CM
= 0V, unless otherwise specified.
MIN
TYP
2.5
5
4.9
75
95
0.10
0.02
0.20
0.03
1
8
MAX
UNITS
ns
%
ns
ns
ns
%
%
DEG
DEG
Ω
mA
t
s
CONDITIONS
A
V
= 1, 10% to 90%, 0.1V
A
V
= 1, 0.1V
A
V
= 1, 50% V
IN
to 50% V
OUT
, 0.1V
10V Step, 0.1%
10V Step, 0.01%
f = 3.58MHz, R
L
= 150Ω (Note 7)
f = 3.58MHz, R
L
= 1k (Note 7)
f = 3.58MHz, R
L
= 150Ω (Note 7)
f = 3.58MHz, R
L
= 1k (Note 7)
A
V
= 1, f = 1MHz
10.5
The
q
denotes the specifications which apply over the temperature range 0°C
≤
T
A
≤
70°C, otherwise specifications are at T
A
= 25°C.
V
S
=
±15V,
V
CM
= 0V, unless otherwise specified.
SYMBOL
V
OS
I
OS
I
B
CMRR
PSRR
A
VOL
V
OUT
I
OUT
SR
I
S
PARAMETER
Input Offset Voltage
Input V
OS
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
q
q
q
q
V
CM
=
±12V
V
S
=
±5V
to
±15V
V
OUT
=
±10V,
R
L
= 500Ω
R
L
= 500Ω
V
OUT
=
±12V
(Note 5)
q
q
q
q
q
q
q
92
86
20
12
24
180
TYP
0.5
20
100
100
114
94
50
13
26
250
8
MAX
3.5
400
400
11
UNITS
mV
µV/°C
nA
nA
dB
dB
V/mV
±V
mA
V/µs
mA
The
q
denotes the specifications which apply over the temperature range – 55°C
≤
T
A
≤
125°C, otherwise specifications are at
T
A
= 25°C. V
S
=
±15V,
V
CM
= 0V, unless otherwise specified.
SYMBOL
V
OS
I
OS
I
B
CMRR
PSRR
A
VOL
V
OUT
I
OUT
SR
I
S
PARAMETER
Input Offset Voltage
Input V
OS
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
q
q
q
q
V
CM
=
±12V
V
S
=
±5V
to
±15V
V
OUT
=
±10V,
R
L
= 500Ω
R
L
= 500Ω
R
L
= 1k
V
OUT
=
±10V
V
OUT
=
±12V
(Note 5)
q
q
q
q
q
q
q
q
q
92
82
5
10
12
20
12
130
TYP
0.5
20
100
100
114
94
50
13
13
26
13
250
8
MAX
4
800
1000
11
UNITS
mV
µV/°C
nA
nA
dB
dB
V/mV
±V
±V
mA
mA
V/µs
mA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
A heat sink may be required when the output is shorted indefinitely.
Note 3:
Commercial parts are designed to operate over – 40°C to 85°C, but
are not tested nor guaranteed beyond 0°C to 70°C. Industrial grade parts
specified and tested over –40°C to 85°C are available on special request.
Consult factory.
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/2πV
P
.
Note 7:
Differential Gain and Phase are tested in A
V
= 2 with five amps in
series. Attenuators of 1/2 are used as loads (75Ω, 75Ω and 499Ω, 499Ω).
3
LT1220
TYPICAL PERFORMANCE CHARACTERISTICS
Input Common Mode Range
vs Supply Voltage
20
MAGNITUDE OF INPUT VOLTAGE (V)
MAGNITUDE OF OUTPUT VOLATGE (V)
T
A
= 25°C
∆V
OS
= 0.5mV
+V
CM
10
–V
CM
5
SUPPLY CURRENT (mA)
15
0
0
5
10
15
SUPPLY VOLTAGE (±V)
20
Output Voltage Swing
vs Resistive Load
30
OUTPUT VOLTAGE SWING (V
P-P
)
25
20
T
A
= 25°C
∆V
OS
= 30mV
INPUT BIAS CURRENT (nA)
200
100
0
–100
–200
–300
– 400
OPEN-LOOP GAIN (dB)
±15V SUPPLIES
15
10
±5V SUPPLIES
5
0
10
100
1k
LOAD RESISTANCE (Ω)
10k
LT1220 • TPC04
Output Short-Circuit Current
vs Temperature
50
OUTPUT SHORT-CIRCUIT CURRENT (mA)
INPUT VOLTAGE NOISE (nV/
√
Hz)
45
40
35
30
25
20
–50
140
120
100
80
60
40
20
0
–25
0
25
75
50
TEMPERATURE (°C)
100
125
POWER SUPPLY REJECTION RATIO (dB)
V
S
=
±5V
4
U W
LT1220 • TPC01
Supply Current vs Supply Voltage
and Temperature
9.0
T
A
= 25°C
Output Voltage Swing
vs Supply Voltage
20
T
A
= 25°C
R
L
= 500Ω
∆V
OS
= 30mV
15
+V
SW
10
–V
SW
5
8.5
8.0
7.5
7.0
0
5
10
15
SUPPLY VOLTAGE (±V)
20
0
0
5
10
15
SUPPLY VOLTAGE (±V)
20
LT1220 • TPC02
LT1220 • TPC03
Input Bias Current
vs Input Common Mode Voltage
500
400
300
I
B+
I
B–
T
A
= 25°C
V
S
=
±15V
110
Open-Loop Gain
vs Resistive Load
T
A
= 25°C
100
V
S
= ±15V
90
V
S
= ±5V
80
70
– 500
–15
60
–10
–5
10
0
5
INPUT COMMON MODE VOLTAGE (V)
15
10
100
1k
LOAD RESISTANCE (Ω)
10k
LT1220 • TPC06
LT1220 • TPC05
Input Noise Spectral Density
160
V
S
= ±15V
T
A
= 25°C
A
V
= 100
100
Power Supply Rejection Ratio
vs Frequency
V
S
= ±15V
T
A
= 25°C
80
60
+PSRR
40
–PSRR
20
10
100
1k
10k
FREQUENCY (Hz)
100k
0
100
1k
100k
1M
10k
FREQUENCY (Hz)
10M
100M
LT1220 • TPC07
LT1220 • TPC08
LT1220 • TPC09
LT1220
TYPICAL PERFORMANCE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
120
COMMON MODE REJECTION RATIO (dB)
10
100
80
60
40
20
0
1k
10k
100k
1M
FREQUENCY (Hz)
V
S
=
±15V
T
A
= 25°C
OUTPUT SWING (V)
2
0
–2
–4
–6
–8
–10
10mV
1mV
OUTPUT SWING (V)
Voltage Gain and Phase
vs Frequency
100
V
S
= ±15V
80
VOLTAGE GAIN (dB)
VOLTAGE MAGNITUDE (dB)
OUTPUT IMPEDANCE (Ω)
V
S
= ±5V
60
40
V
S
= ±15V
20
V
S
= ±5V
0
T
A
= 25°C
–20
100
1k
100k
1M
10k
FREQUENCY (Hz)
10M
–20
100M
0
20
60
40
Gain-Bandwidth vs Temperature
50
V
S
= ±15V
48
GAIN-BANDWIDTH (MHz)
300
275
SLEW RATE (V/µs)
TOTAL HARMONIC DISTORTION AND NOISE (%)
46
44
42
40
38
–50
–25
0
25
75
50
TEMPERATURE (°C)
U W
10M
LT1220 • TPC10
Output Swing and Error
vs Settling Time (Noninverting)
10
8
6
10mV
1mV
4
2
0
–2
–4
–6
–8
0
25
75
100
50
SETTLING TIME (ns)
125
–10
8
6
4
Output Swing and Error
vs Settling Time (Inverting)
10mV
1mV
10mV
1mV
100M
0
25
75
100
50
SETTLING TIME (ns)
125
LT1220 • TPC11
LT1220 • TPC12
Frequency Response
vs Capacitive Load
100
80
PHASE MARGIN (DEG)
10
8
6
4
2
0
–2
–4
–6
–8
–10
1
10
FREQUENCY (MHz)
100
LT1220 • TPC14
Closed-Loop Output Impedance
vs Frequency
100
V
S
= ±15V
T
A
= 25°C
A
V
= 1
10
V
S
= ±15V
T
A
= 25°C
A
V
= –1
C = 100pF
C = 50pF
C = 500pF
C = 1000pF
C=0
1
0.1
0.01
10k
100k
1M
10M
FREQUENCY (Hz)
100M
LT1220 • TPC15
LT1220 • TPC13
Slew Rate vs Temperature
0.01
V
S
= ±15V
A
V
= –1
R
IN
= R
F
= 1k
+SR
Total Harmonic Distortion
vs Frequency
V
S
= ±15V
V
O
= 3V
RMS
R
L
= 500Ω
250
–SR
225
200
175
150
–50
0.001
A
V
= –1
A
V
= 1
100
125
–25
0
25
75
50
TEMPERATURE (°C)
100
125
0.0001
10
100
1k
10k
FREQUENCY (Hz)
100k
LT1220 • TPC18
LT1220 • TPC16
LT1220 • TPC24
5
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