ISL59482 Datasheet, PDF (10/14 Pages) Intersil Corporation – Dual, 500MHz Triple, Multiplexing Amplifiers

ISL59482
Pin Description (Continued)
ISL59482
EQUIVALENT
(48 LD QFN) PIN NAME CIRCUIT
42
IN2C1
Circuit 1 Channel 2 input for amplifier C1
43
GND
Circuit 4A Ground pin for amplifier C1
44
IN3A1
Circuit 1 Channel 3 input for amplifier A1
45
IN3B1
Circuit 1 Channel 3 input for amplifier B1
46
IN3C1
Circuit 1 Channel 3 input for amplifier C1
DESCRIPTION
Pin Equivalent Circuits
V+
IN
V-
CIRCUIT 1
LOGIC PIN
21k
+
1.2V
-
33k
CIRCUIT 2
V+
GND
V-
V1+
GNDA1
GNDB1
GNDC1
V1-
CAPACITIVELY
COUPLED
ESD CLAMP
CIRCUIT 4A
V2+
GNDA2
GNDB2
GNDC2
V2-
CAPACITIVELY
COUPLED
ESD CLAMP
CIRCUIT 4B
V+
OUT
V-
CIRCUIT 3
SUBSTRATE 1
V1-
~1MΩ
SUBSTRATE 2
V2-
~1MΩ
THERMAL HEAT SINK PAD
AC Test Circuits
V_IN
50Ω
or
75Ω
ISL59482
C_L
5pF
R_L
500Ω
FIGURE 27A. TEST CIRCUIT WITH OPTIMAL OUTPUT LOAD
ISL59482
R_S
V_IN
50Ω
C_L ^475Ω
50Ω
or
5pF
or
75Ω
75Ω
TEST
EQUIPMENT
50Ω
or
75Ω
FIGURE 27B. TEST CIRCUIT FOR MEASURING WITH 50Ω OR
75Ω INPUT TERMINATED EQUIPMENT
AC Test Circuits (Continued)
V_IN
50Ω
or
75Ω
ISL59482
R_S
C_L ^{50Ω or 75Ω}
5pF
TEST
EQUIPMENT
50Ω
or
75Ω
FIGURE 27C. BACKLOADED TEST CIRCUIT FOR VIDEO
CABLE APPLICATION. BANDWIDTH AND
LINEARITY FOR R_L LESS THAN 500Ω WILL BE
DEGRADED.
FIGURE 27. TEST CIRCUITS
Figure 27A illustrates the optimum output load for testing AC
performance. Figure 27B illustrates the optimum output load
when connecting to 50Ω input terminated equipment.
10
FN6209.2
December 22, 2006