LT1205 Linear Technology Corporation, LT1205 Datasheet - Page 14

• Manufacturer Part Number: LT1205
• Description: 150mhz Video Multiplexers
• Manufacturer: Linear Technology Corporation

LT1203/LT1205
A
those used in the 16-to-1 crosspoint with one additional
suggestion: Surround the LT1205 output traces by ground
plane and route them away from the (–) inputs of the
other three LT1254s.
Each pair of logic inputs labeled Select Logic Output is
used to select a particular output. The truth table is used
to select the desired input and is applied to each pair of
logic inputs. For example, to route Channel 1 Input to
14
PPLICATI
Response of All Four Inputs for the 4 4 Crosspoint
–2
–4
–6
–8
2
0
1
V
R
R
S
F
L
O
= R
= ±5V
= 100
G
U
= 820
S
FREQUENCY (MHz)
I FOR ATIO
10
U
OF SELECT
OUTPUT 0
INPUT A
LOGIC
W
LT1203/05 • AI08
4 4 Crosspoint, Switching Channel 0 to Channel 2
100
CHANNEL 0 = 1V
CHANNEL 2 = 0V
200
U
Output 3, the 4th pair of logic inputs labeled Select Logic
Output 3 is coded A = Low and B = High. To route
Channel 3 Input to all outputs, set all eight logic inputs
High. Channel 3 is the default input with all logic inputs
open. To shut off all channels a pair of LT1259s can be
substituted for the LT1254. The LT1259 is a dual current
feedback amplifier with a shutdown pin that reduces the
supply current to 0 A.
–100
–120
–40
–60
–80
4 4 Crosspoint, All Hostile Rejection
LT1203/05 • AI10
1
V
R
R
S
L
S
= ±5V
= 100
= 0
5V
0V
FREQUENCY (MHz)
10
LT1203/05 • AI09
100