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LT1254CN#PBF

P1-P3P4-P6P7-P8
LT1253/LT1254
1
Low Cost Dual and Quad
Video Amplifiers
The LT1253 is a low cost dual current feedback amplifier
for video applications. The LT1254 is a quad version of the
LT1253. The amplifiers are completely isolated except for
the power supply pins and therefore have excellent isola-
tion, over 94dB at 5MHz. Dual and quad amplifiers signifi-
cantly reduce costs compared with singles; the number of
insertions is reduced and fewer supply bypass capacitors
are required. In addition, these duals and quads cost less
per amplifier than single video amplifiers.
The LT1253/LT1254 amplifiers are ideal for driving low
impedance loads such as cables and filters. The wide
bandwidth and high slew rate of these amplifiers make
driving RGB signals between PCs and workstations easy.
The excellent linearity of these amplifiers makes them
ideal for composite video.
The LT1253 is available in 8-pin DIPs and the S8 surface
mount package. The LT1254 is available in 14-pin DIPs
and the S14 surface mount package. Both parts have the
industry standard dual and quad op amp pin out. For
higher performance, see the LT1229/LT1230.
■
Low Cost
■
Current Feedback Amplifiers
■
Differential Gain: 0.03%, R
L
= 150Ω, V
S
= ±5V
■
Differential Phase: 0.28°, R
L
= 150Ω, V
S
= ±5V
■
Flat to 30MHz, 0.1dB
■
90MHz Bandwidth on ±5V
■
Wide Supply Range: ±2V(4V) to ±14V(28V)
■
Low Power: 60mW per Amplifier at ±5V
S
F
EA
T
U
RE
D
U
ESCRIPTIO
■
RGB Cable Drivers
■
Composite Video Cable Drivers
■
Gain Blocks in IF Stages
U
S
A
O
PP
L
IC
AT
I
U
A
O
PP
L
IC
AT
ITY
P
I
CA
L
Transient Response
V
S
= ±5V
A
V
= 2
R
L
= 150Ω
V
O
= 1V
LT1253/54 • TA02
V
IN
V
OUT
R
G
620Ω
R
F
620Ω
75Ω
75Ω
CABLE
75Ω
+
–
1/2 LT1253
LT1253/54 • TA01
A
V
= 1 +
R
F
R
G
AT AMPLIFIER OUTPUT.
6dB LESS AT V
OUT
.
BW = 90MHz
5V
–5V
2
LT1253/LT1254
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
Storage Temperature Range ................ – 65°C to 150°C
Junction Temperature (Note 2)............................ 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
Total Supply Voltage (V
+
to V
–
) ............................. 28V
Input Current ..................................................... ±15mA
Output Short-Circuit Duration (Note 1)........ Continuous
Operating Temperature Range
LT1253C, LT1254C................................. 0°C to 70°C
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1254CN
LT1254CS
S8 PART MARKING
1253
LT1253CN8
LT1253CS8
N PACKAGE
14-LEAD PLASTIC DIP
+
V
D
14
13
12
11
10
9
87
6
5
4
3
2
1
OUT A
–IN A
+IN A
+IN B
–IN B
OUT B OUT C
V
–
–IN D
OUT D
TOP VIEW
A
+IN D
+IN C
–IN C
C
B
S PACKAGE 
14-LEAD PLASTIC SOIC
T
JMAX
= 150°C, θ
JA
= 100°C/ W (N)
T
JMAX
= 150°C, θ
JA
= 150°C/ W (S)
8
7
6
54
3
2
1
+
–IN A
+IN A
V
TOP VIEW
N8 PACKAGE
8-LEAD PLASTIC DIP
OUT A
OUT B
–
V
–IN B
+IN B
A
B
S8 PACKAGE 
8-LEAD PLASTIC SOIC
Symbol Parameter CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage 515 mV
+I
B
Noninverting Bias Current 115 µA
–I
B
Inverting Bias Current 20 100 µA
A
VOL
Large-Signal Voltage Gain V
S
= ±5V, V
O
= ±2V, R
L
= 150Ω 560 1500 V/V
PSRR Power Supply Rejection Ratio V
S
= ±3V to ±12V 60 70 dB
CMRR Common-Mode Rejection Ratio V
S
= ±5V, V
CM
= ±2V 55 65 dB
V
OUT
Maximum Output Voltage Swing V
S
= ±12V, R
L
= 500Ω±7.0 ±10.5 V
V
S
= ±5V, R
L
= 150Ω±2.5 ±3.7 V
I
OUT
Maximum Output Current 30 55 mA
I
S
Supply Current Per Amplifier 6 11 mA
R
IN
Input Resistance 110 MΩ
C
IN
Input Capacitance 3pF
Power Supply Range Dual ±2 ±12 V
Single 4 24 V
Channel Separation f = 10MHz 88 dB
SR Input Slew Rate A
V
= 1 125 V/µs
Output Slew Rate A
V
= 2 250 V/µs
ELECTRICAL CHARACTERISTICS
0°C ≤ T
A
≤ 70°C, V
S
= ±5V to ±12V, unless otherwise noted.
T
JMAX
= 150°C, θ
JA
= 70°C/W (N)
T
JMAX
= 150°C, θ
JA
= 100°C/ W (S)
LT1253/LT1254
3
Symbol Parameter CONDITIONS MIN TYP MAX UNITS
t
r
Small-Signal Rise Time V
S
= ±12V, A
V
= 2 3.5 ns
Rise and Fall Time V
S
= ±5V, A
V
= 2, V
OUT
= 1V
P-P
5.8 ns
t
p
Propagation Delay V
S
= ±5V, A
V
= 2 3.5 ns
Note 1: A heat sink may be required to keep the junction temperature
below absolute maximum when the output is shorted indefinitely.
Note 2: T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LT1253CN8: T
J
= T
A
+ (P
D
× 100°C/W)
LT1253CS8: T
J
= T
A
+ (P
D
× 150°C/W)
LT1254CN: T
J
= T
A
+ (P
D
× 70°C/W)
LT1254CS: T
J
= T
A
+ (P
D
× 100°C/W)
TYPICAL AC PERFOR A CE
WU
Small Signal Small Signal Small Signal
V
S
A
V
R
L
R
F
R
G
–3dB BW (MHz) –0.1dB BW (MHz) Peaking (dB)
±12 1 1000 1100 None 270 51 3.4
±12 1 150 1000 None 204 48 1.3
±12 –1 1000 750 150 110 59 0.1
±12 –1 150 768 768 89 50 0.1
±12 2 1000 715 715 179 76 0.3
±12 2 150 715 715 117 62 0
±12 5 1000 680 180 106 42 0
±12 5 150 680 180 90 47 0
±12 10 1000 620 68.1 89 49 0.1
±12 10 150 620 68.1 80 46 0.1
±5 1 1000 787 None 218 53 1.5
±5 1 150 787 None 158 91 0.1
±5 –1 1000 715 715 76 28 0.1
±5 –1 150 715 715 70 30 0.1
±5 2 1000 620 620 117 58 0.1
±5 2 150 620 620 92 52 0.1
±5 5 1000 620 150 82 36 0
±5 5 150 620 150 72 34 0
±5 10 1000 562 61.9 70 35 0
±5 10 150 562 61.9 65 28 0
BANDWIDTH
DIFFERENTIAL DIFFERENTIAL
V
S
A
V
R
L
R
F
R
G
GAIN PHASE
±12 2 1000 750 750 0.01% 0.03°
±12 2 150 750 750 0.01% 0.12°
±5 2 1000 750 750 0.03% 0.18°
±5 2 150 750 750 0.03% 0.28°
NTSC VIDEO (Note 1)
ELECTRICAL CHARACTERISTICS
0°C ≤ T
A
≤ 70°C, V
S
= ±5V to ±12V, unless otherwise noted.
Note 1: Differential Gain and Phase are measured using a Tektronix TSG
120 YC/NTSC signal generator and a Tektronix 1780R Video Measurement
Set. The resolution of this equipment is 0.1% and 0.1°. Ten identical
amplifier stages were cascaded giving an effective resolution of 0.01% and
0.01°.
P1-P3P4-P6P7-P8

LT1254CN#PBF

Mfr. #:
Buy LT1254CN#PBF
Manufacturer:
Analog Devices Inc.
Description:
Video Amplifiers L Cost 2x & 4x Video Amps
Lifecycle:
New from this manufacturer.
Delivery:
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