LT1223
100MHz Current
Feedback Amplifier
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
100MHz Bandwidth at A
V
= 1
1000V/µs Slew Rate
Wide Supply Range:
±5V
to
±15V
1mV Input Offset Voltage
1µA Input Bias Current
5MΩ Input Resistance
75ns Settling Time to 0.1%
50mA Output Current
6mA Quiescent Current
The LT1223 is a 100MHz current feedback amplifier with
very good DC characteristics. The LT1223’s high slew
rate, 1000V/µs, wide supply range,
±15V,
and large output
drive,
±50mA,
make it ideal for driving analog signals over
double- terminated cables. The current feedback amplifier
has high gain bandwidth at high gains, unlike conventional
op amps.
The LT1223 comes in the industry standard pinout and
can upgrade the performance of many older products.
The LT1223 is manufactured on Linear Technology’s
proprietary complementary bipolar process.
APPLICATI
s
s
s
s
s
S
Video Amplifiers
Buffers
IF and RF Amplification
Cable Drivers
8-, 10-, 12-Bit Data Acquisition Systems
TYPICAL APPLICATI
Video Cable Driver
60
V
IN
+
LT1223
–
R
F
1k
75
Ω
CABLE
75
Ω
Voltage Gain vs Frequency
100MHz GAIN
BANDWIDTH
R
G
= 10
R
G
= 33
R
G
= 110
R
G
= 470
R
G
=
∞
+
–
1k
R
G
50
40
VOLTAGE GAIN (dB)
30
20
10
0
V
OUT
R
G
1k
75Ω
–10
–20
100k
1M
10M
FREQUENCY (Hz)
LT1223 • TPC01
R
A
V
= 1 +
F
R
G
AT AMPLIFIER OUTPUT.
6dB LESS AT V
OUT
.
LT1223 • TA02
U
100M
1G
UO
UO
1
LT1223
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
NULL
–IN
+IN
V
–
1
2
3
4
8
7
6
5
SHUTDOWN
V
+
OUT
NULL
Supply Voltage ......................................................
±18V
Differential Input Voltage .........................................
±5V
Input Voltage ............................ Equal to Supply Voltage
Output Short Circuit Duration (Note 1) ......... Continuous
Operating Temperature Range
LT1223M ........................................ –55°C to 125°C
LT1223C ................................................ 0°C to 70°C
Storage Temperature Range ................. –65°C to 150°C
Junction Temperature Plastic Package ........... 150°C
Junction Temperature Ceramic Package ........ 175°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
ORDER PART
NUMBER
LT1223MJ8
LT1223CJ8
LT1223CN8
LT1223CS8
S8 PART MARKING
1223
J8 PACKAGE
N8 PACKAGE
8-LEAD CERAMIC DIP 8-LEAD PLASTIC DIP
S8 PACKAGE
8-LEAD PLASTIC SOIC
LT1223 • POI01
T
J MAX
= 175°C,
θ
JA
= 100°C/W(J8)
T
J MAX
= 150°C,
θ
JA
= 100°C/W(N8)
T
J MAX
= 150°C,
θ
JA
= 150°C/W(S8)
ELECTRICAL CHARACTERISTICS
V
S
=
±
15V, T
A
= 25°C, unless otherwise noted.
SYMBOL
V
OS
I
IN
+
I
IN
–
e
n
i
n
R
IN
C
IN
CMRR
PSRR
PARAMETER
Input Offset Voltage
Noninverting Input Current
Inverting Input Current
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range
Common-Mode Rejection Ratio
Inverting Input Current Common-Mode Rejection
Power Supply Rejection Ratio
Noninverting Input Current Power Supply Rejection
Inverting Input Current Power Supply Rejection
A
V
R
OL
V
OUT
I
OUT
SR
BW
t
r
t
PD
t
s
Large Signal Voltage Gain
Transresistance,
∆V
OUT
/∆I
IN
–
Maximum Output Voltage Swing
Maximum Output Current
Slew Rate
Bandwidth
Rise Time
Propagation Delay
Overshoot
Settling Time, 0.1%
Differential Gain
Differential Phase
R
OUT
I
S
Open-Loop Output Resistance
Supply Current
Supply Current, Shutdown
V
CM
=
±10V
V
CM
=
±10V
V
S
=
±4.5V
to
±18V
V
S
=
±4.5V
to
±18V
V
S
=
±4.5V
to
±18V
R
LOAD
= 400Ω, V
OUT
=
±10V
R
LOAD
= 400Ω, V
OUT
=
±10V
R
LOAD
= 200Ω
R
LOAD
= 200Ω
R
F
= 1.5k, R
G
= 1.5k, (Note 2)
R
F
= 1k, R
G
= 1k, V
OUT
= 100mV
R
F
= 1.5k, R
G
= 1.5k, V
OUT
= 1V
R
F
= 1.5k, R
G
= 1.5k, V
OUT
= 1V
R
F
= 1.5k, R
G
= 1.5k, V
OUT
= 1V
R
F
= 1k, R
G
= 1k, V
OUT
= 10V
R
F
= 1k, R
G
= 1k, R
L
= 150Ω
R
F
= 1k, R
G
= 1k, R
L
= 150Ω
V
OUT
= 0, I
OUT
= 0
V
IN
= 0V
Pin 8 Current = 200µA
70
1.5
±10
50
800
68
±10
56
CONDITIONS
V
CM
= 0V
V
CM
= 0V
V
CM
= 0V
f = 1kHz, R
F
= 1k, R
G
= 10Ω
f = 1kHz, R
F
= 1k, R
G
= 10Ω
V
IN
=
±10V
1
MIN
LT1223M/C
TYP
±1
±1
±1
3.3
2.2
10
1.5
±12
63
30
80
12
60
89
5
±12
60
1300
100
6.0
6.0
5
75
0.02
0.12
35
6
2
10
4
100
500
100
MAX
±3
±3
±3
UNITS
mV
µA
µA
nV/√Hz
pA/√Hz
MΩ
pF
V
dB
nA/V
dB
nA/V
nA/V
dB
MΩ
V
mA
V/µs
MHz
ns
ns
%
ns
%
Deg
Ω
mA
mA
2
U
W
U
U
W W
W
LT1223
ELECTRICAL CHARACTERISTICS
V
S
=
±
15V, V
CM
= 0V, 0°C
≤
T
A
≤
70°C, unless otherwise noted.
SYMBOL
V
OS
I
IN
+
I
IN
–
R
IN
CMRR
PSRR
PARAMETER
Input Offset Voltage
Noninverting Input Current
Inverting Input Current
Input Resistance
Input Voltage Range
Common-Mode Rejection Ratio
Inverting Input Current Common-Mode Rejection
Power Supply Rejection Ratio
Noninverting Input Current Power Supply Rejection
Inverting Input Current Power Supply Rejection
A
V
R
OL
V
OUT
I
OUT
I
S
Large-Signal Voltage Gain
Transresistance,
∆V
OUT
/∆I
IN
–
Maximum Output Voltage Swing
Maximum Output Current
Supply Current
Supply Current, Shutdown
V
CM
=
±10V
V
CM
=
±10V
V
S
=
±4.5V
to
±18V
V
S
=
±4.5V
to
±18V
V
S
=
±4.5V
to
±18V
R
LOAD
= 400Ω, V
OUT
=
±10V
R
LOAD
= 400Ω, V
OUT
=
±10V
R
LOAD
= 200Ω
R
LOAD
= 200Ω
V
IN
= 0V
Pin 8 Current = 200µA
CONDITIONS
V
CM
= 0V
V
CM
= 0V
V
CM
= 0V
V
IN
=
±10V
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
MIN
±1
±1
±1
1
±10
56
68
LT1223C
TYP
±3
±3
±3
10
±12
63
30
80
12
60
MAX
mV
µA
µA
UNITS
MΩ
V
dB
100
100
500
nA/V
dB
nA/V
nA/ V
dB
MΩ
V
mA
10
4
mA
mA
70
1.5
±10
50
89
5
±12
60
6
2
ELECTRICAL CHARACTERISTICS
V
S
=
±
15V, V
CM
= 0V, – 55°C
≤
T
A
≤
125°C, unless otherwise noted.
SYMBOL
V
OS
I
IN
+
I
IN
–
R
IN
CMRR
PSRR
PARAMETER
Input Offset Voltage
Noninverting Input Current
Inverting Input Current
Input Resistance
Input Voltage Range
Common-Mode Rejection Ratio
Inverting Input Current Common-Mode Rejection
Power Supply Rejection Ratio
Noninverting Input Current Power Supply Rejection
Inverting Input Current Power Supply Rejection
A
V
R
OL
V
OUT
I
OUT
I
S
Large-Signal Voltage Gain
Transresistance,
∆V
OUT
/∆I
IN
–
Maximum Output Voltage Swing
Maximum Output Current
Supply Current
Supply Current, Shutdown
The
q
denotes the specifications which apply over the full operating
temperature range.
Note 1:
A heat sink may be required.
Note 2:
Noninverting operation, V
OUT
=
±10V,
measured at
±5V.
V
CM
=
±10V
V
CM
=
±10V
V
S
=
±4.5V
to
±15V
V
S
=
±4.5V
to
±15V
V
S
=
±4.5V
to
±15V
R
LOAD
= 400Ω, V
OUT
=
±10V
R
LOAD
= 400Ω, V
OUT
=
±10V
R
LOAD
= 200Ω
R
LOAD
= 200Ω
V
IN
= 0V
Pin 8 Current = 200µA
CONDITIONS
V
CM
= 0V
V
CM
= 0V
V
CM
= 0V
V
IN
=
±10V
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
MIN
LT1223M
TYP
±1
±1
±1
MAX
±5
±5
±10
UNITS
mV
µA
µA
MΩ
V
dB
1
±10
56
68
10
±12
63
30
80
12
60
200
500
100
nA/V
dB
nA/V
nA/V
dB
MΩ
V
mA
70
1.5
±7
35
89
5
±12
60
6
2
10
4
mA
mA
3
LT1223
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage,
V
IN
= 0 (Operating)
10
125°C
8
SUPPLY CURRENT (mA)
4
PIN 8 = 0V
OUTPUT SHORT CIRCUIT CURRENT (mA)
25°C
6
–55°C
4
SUPPLY CURRENT (mA)
2
0
0
2
4
6
8
10 12 14 16 18 20
LT1223 • TPC02
SUPPLY VOLTAGE (
±
V)
Input Common-Mode Limit vs
Temperature
V+
–1
COMMON MODE RANGE (V)
–2
–3
–4
+4
+3
+2
+1
V–
–50
–25
0
25
50
V
S
= –15V
V
S
= 5V
V
S
= 15V
–l
B
(
µ
A)
+l
B
(
µ
A)
V
S
= –5V
75
TEMPERATURE (°C)
LT1223 • TPC05
V
OS
vs Common-Mode Voltage
20
15
10
5
V
OS
(mV)
20
V
S
=
±
15V
OUTPUT VOLTAGE SWING (V)
OUTPUT VOLTAGE SWING (V)
125°C
0
–5
–10
–15
–20
–15
–10
–5
0
5
10
15
–55°C
25°C
COMMON MODE VOLTAGE (V)
LT1223 • TPC08
4
U W
100
125
Supply Current vs Supply Voltage
(Shutdown)
100
90
80
70
60
50
40
30
20
10
Output Short Circuit-Current vs
Temperature
3
125°C
2
25°C
–55°C
1
0
0
2
4
6
8
10 12 14 16 18 20
LT1223 • TPC03
0
–50
–25
0
25
50
75
100
125
SUPPLY VOLTAGE (
±
V)
CASE TEMPERATURE (°C)
LT1223 • TPC04
+I
B
vs Common-Mode Voltage
5
4
3
2
1
0
–1
–2
–3
–4
–5
–15
–10
–5
0
5
10
15
25°C
–55°C
V
S
= ±15V
–I
B
vs Common-Mode Voltage
10
8
125°C
6
4
2
0
–2
–4
–6
–8
–10
–15
–10
–5
0
5
10
15
25°C
–55°C
V
S
=
±
15V
125°C
COMMON MODE VOLTAGE (V)
LT1223 • TPC06
COMMON MODE VOLTAGE (V)
LT1223 • TPC07
Output Voltage Swing vs
Load Resistor
20
V
S
=
±
15V
125°C
25°C, –55°C
15
15
10
5
0
–5
–10
–15
–20
100
1000
LOAD RESISTOR (
Ω
)
LT1223 • TPC09
Output Voltage Swing vs
Supply Voltage
125°C
10
5
0
–5
–10
–15
–20
25°C
25°C
–55°C
25°C, –55°C
125°C
10000
125°C
–55°C
0
2
4
6
8
10 12 14 16 18 20
LT1223 • TPC10
SUPPLY VOLTAGE (
±
V)
LT1223
TYPICAL PERFOR A CE CHARACTERISTICS
–3dB Bandwidth vs
Feedback Resistor
100
90
A
V
= 2; R
F
= R
G
R
L
= 100
Ω
; V
S
=
±
15V
NO CAPACITIVE LOAD
100
90
70
60
50
40
30
20
10
0
0
1
2
3
LT1223 • TPC11
70
60
50
40
30
20
10
0
0
FEEDBACK RESISTOR (
Ω
)
–3dB BANDWIDTH (MHz)
80
–3dB BANDWIDTH (MHz)
FEEDBACK RESISTOR (k
Ω
)
Maximum Capacitive Load vs
Feedback Resistor
10k
100
OPEN LOOP VOLTAGE GAIN (dB)
TRANSIMPEDANCE (M
Ω
)
A
V
= 2; R
F
= R
G
R
L
= 100; V
S
=
±
15V
PEAKING < 5dB
CAPACITIVE LOAD (pF)
1k
100
10
0
1
2
3
LT1223 • TPC14
FEEDBACK RESISTOR (k
Ω
)
Spot Noise Voltage and Current vs
Frequency
1000
80
POWER SUPPLY REJECTION (dB)
SPOT NOISE (nV/
√
Hz OR pA/
√
Hz)
V
S
= ±15V
R
F
= 1k
60
POSITIVE
MAGNITUDE OF OUTPUT IMPEDANCE (
Ω
)
100
–i n
10
en
+i n
1
10
100
1k
10k
LT1223 • TPC17
FREQUENCY (Hz)
U W
–3dB Bandwidth vs
Supply Voltage
1000
R
F
= R
G
A
V
= 2
R
L
= 100
Ω
T
A
= 25°C
R
F
= 750
R
F
= 1k
Minimum Feedback Resistor vs
Voltage Gain
900
800
700
600
500
400
300
200
100
2dB PEAKING
0dB PEAKING
V
S
=
±
15V
R
L
= 100
80
R
F
= 1.5k
R
F
= 2k
5
10
15
LT1223 • TPC12
0
10
20
30
40
50
60
SUPPLY VOLTAGE (
±
V)
VOLTAGE GAIN (V/V)
LT1223 • TPC13
Open-Loop Voltage Gain vs
Load Resistor
25°C
10
9
–55°C
80
70
60
50
40
100
V
S
=
±
15V
V
O
=
±
10V
1000
LOAD RESISTOR (
Ω
)
LT1223 • TPC15
Transimpedance vs Load Resistor
V
S
=
±
15V
V
O
=
±
10V
90
8
7
6
5
4
3
2
1
25°C
125°C
–55°C
125°C
10000
0
100
1000
LOAD RESISTOR (
Ω
)
10000
LT1223 • TPC16
Power Supply Rejection vs
Frequency
100
Output Impedance vs Frequency
V
S
=
±
15V
10
40
NEGATIVE
20
1
R
F
= R
G
= 3k
R
F
= R
G
= 1k
0.1
0
10k
100k
1M
FREQUENCY (Hz)
10M
100M
0.01
10k
100k
1M
FREQUENCY (Hz)
10M
100M
LT1223 • TPC18
LT1223 • TPC19
5
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