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PDF LT1203CS8 Data sheet ( Hoja de datos )
| Número de pieza | LT1203CS8 | |
| Descripción | 150MHz Video Multiplexers | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
s – 3dB Bandwidth: 150MHz
s 0.1dB Gain Flatness: 30MHz
s Channel-to-Channel Switching Time: 25ns
s Turn-On/Turn-Off Time: 25ns
s High Slew Rate: 300V/µs
s Disabled Output Impedance: 10MΩ
s 50mV Switching Transient
s Channel Separation at 10MHz: > 90dB
s Differential Gain: 0.02%
s Differential Phase: 0.02°
s Wide Supply Range: ±5V to ±15V
s Output Short-Circuit Protected
s Push-Pull Output
APPLICATI S
s Broadcast Quality Video Multiplexing
s Picture-in-Picture Switching
s HDTV
s Computer Graphics
s Title Generation
s Video Crosspoint Matrices
s Video Routers
TYPICAL APPLICATI
RED 1
RED 2
V–
GREEN 1
GREEN 2
V–
High Speed RGB MUX
+1
+1
LT1205
+1
+1
CHANNEL SELECT
V+
EN
LOGIC
V+
VOUT RED
EN
LOGIC
VOUT GREEN
BLUE 1
BLUE 2
V–
+1
LT1203
+1
V+
EN
LOGIC
VOUT BLUE
LT1203 • TA01
LT1203/LT1205
150MHz Video Multiplexers
DESCRIPTIO
The LT1203 is a wideband 2-input video multiplexer
designed for pixel switching and broadcast quality rout-
ing. The LT1205 is a dual version that is configured as a
4-input, 2-output multiplexer.
These multiplexers act as SPDT video switches with 10ns
transition times at toggle rates up to 30MHz. The – 3dB
bandwidth is 150MHz and 0.1dB gain flatness is 30MHz.
Many parts can be tied together at their outputs by using
the enable feature which reduces the power dissipation
and raises the output impedance to 10MΩ. Output capaci-
tance when disabled is only 3pF and the LT1203 peaks less
than 3dB into a 50pF load. Channel crosstalk and disable
isolation are greater than 90dB up to 10MHz. An on-chip
buffer interfaces to fast TTL or CMOS logic. Switching
transients are only 50mV with a 25ns duration. The
LT1203 and LT1205 outputs are protected against shorts
to ground.
The LT1203/LT1205 are manufactured using Linear
Technology’s proprietary complementary bipolar process.
The LT1203 is available in both the 8-lead PDIP and SO
package while the LT1205 is available in the 16-lead
narrow body SO package.
Large-Signal Response
1
1 page  
WU
TYPICAL PERFOR A CE CHARACTERISTICS
– 3dB Bandwidth
vs Supply Voltage
200
TA = 25°C
RL = 10k
PEAKING ≤ 0.5dB
180
160
140
120
0 2 4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (±V)
LT1203/05 • TPC03
Crosstalk Rejection
vs Frequency
–30
TA = 25°C
– 40
RS
RL
=
=
0Ω
∞
–50
– 60
–70
–80
VS = ±5V
– 90
–100
VS = ±15V
–110
1
10
FREQUENCY (MHz)
100
LT1203/05 • TPC06
Output Impedance (Enabled)
vs Frequency
100
80
VS = ±15V
TA = 25°C
60
40
30
20
Frequency Response
with Capacitive Loads
5
4
3
VS = ±15V
TA
RL
=
=
25°C
∞
CL = 20pF
CL = 50pF CL = 10pF
2
CL = 100pF
1
0
–1
–2
–3
–4
–5
1 10 100
FREQUENCY (MHz)
LT1203/05 • TPC04
Disable Rejection
vs Frequency
–20
–30
VS = ±15V
TA = 25°C
– 40
–50
– 60 RL = ∞
–70
RL = 1k
–80
–90
–100
–110
RL = 100Ω
RL = 10Ω
–120
1
10
FREQUENCY (MHz)
100
LT1203/05 • TPC07
Supply Current
vs Supply Voltage (Enabled)
9.6
LT1203
RL = ∞
9.2
125° 25°
–55°
8.8
8.4
8.0
10
10k
100k 1M
10M
FREQUENCY (Hz)
100M
LT1203/05 • TPC09
7.6
0 2 4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (±V)
LT1203/05 • TPC10
LT1203/LT1205
Crosstalk Rejection
vs Frequency
–30
VS = ±15V
– 40
TA
RL
=
=
25°C
∞
–50
– 60
–70
–80
–90
–100
RS = 75Ω
RS = 37.5Ω
RS = 0Ω
RS = 10Ω
–110
1
10
FREQUENCY (MHz)
100
LT1203/05 • TPC05
Power Supply Rejection Ratio
vs Frequency
70
VS = ±15V
60
50
–PSRR
TA
RL
=
=
25°C
∞
RS = 0Ω
40
+PSRR
30
20
10
0
1 10 100
FREQUENCY (MHz)
LT1203/05 • TPC08
Supply Current
vs Supply Voltage (Disabled)
5.2
LT1203
RL = ∞
5.0
25°
125°
4.8
–55°
4.6
4.4
02
4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (±V)
LT1203/05 • TPC11
5
5 Page 
LT1203/LT1205
APPLICATI S I FOR ATIO
CH0
CH15
C1
0.1µF
R1
75Ω
R16
75Ω
C3
0.1µF
–15V 15V GND
5V
C7
0.1µF
1
+1
2
3
+1
4
5
+1
6
7
+1
8
U1
LT1205
16
15
14
13
12
11
10
9
C2
0.1µF
16 8
15
Y0
1
A
14
Y1
2
B
13
Y2
3
C
12
Y3 U5
11 Y4 74HCT238
10
Y5
6
G1
9
Y6
5
G2B
7
Y7
4
G2A
A
B
C
D
EN
1
+1
2
3
+1
4
5
+1
6
7
+1
8
U2
LT1205
16
15
14
13
12
11
10
9
1
+1
2
3
+1
4
5
+1
6
7
+1
8
U3
LT1205
16
15
14
13
12
11
10
9
1
+1
2
3
+1
4
5
+1
6
7
+1
8
U4
LT1205
16
15
14
13
12
11
10
9
C4
0.1µF
OPTIONAL
RX
10k
+
C5
4.7µF
2+
7
U6
LT1252
3– 4
C6
+ 4.7µF
RG
1.6k
RF
1.6k
RS
6 75Ω
OUTPUT
LT1203/05 • F05
D
X
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
TRUTH TABLE
LOGIC
SELECT
ENABLE
CBA
EN
XXX
L
LLL
H
LLH
H
LHL
H
LHH
H
HLL
H
HLH
H
HHL
H
HHH
H
LLL
H
LLH
H
LHL
H
LHH
H
HLL
H
HLH
H
HHL
H
HHH
H
OUTPUT
OFF
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
CH10
CH11
CH12
CH13
CH14
CH15
Figure 5. 16-to-1 Multiplexer and Truth Table
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LT1203CS8.PDF ] | |
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