ISL59440_07 Datasheet, PDF (8/12 Pages) Intersil Corporation – 400MHz Multiplexing Amplifier

ISL59440
Pin Descriptions
EQUIVALENT
PIN NUMBER PIN NAME CIRCUIT
DESCRIPTION
1, 3, 7
NIC
Not Internally Connected; it is recommended this pin be tied to ground to minimize crosstalk.
2
IN0
Circuit 1 Input for Channel 0
4
IN1
Circuit 1 Input for Channel 1
5
GND
Circuit 4 Ground pin
6
IN2
Circuit 1 Input for Channel 2
8
IN3
Circuit 1 Input for Channel 3
9
S0
Circuit 2 Channel selection pin LSB (binary logic code)
10
S1
Circuit 2 Channel selection pin MSB (binary logic code)
11
V-
Circuit 4 Negative power supply
12
V+
Circuit 4 Positive power supply
13
OUT
Circuit 3 Output
14
IN-
Circuit 1 Inverting input of output amplifier
15
HIZ
Circuit 2 Output disable (active high); there are internal pull-down resistors, so the device will be active with
no connection; “HI” puts the output in high impedance state.
16
ENABLE
Circuit 2 Device enable (active low); there are internal pull-down resistors, so the device will be active with
no connection; "HI" puts device into power-down mode.
V+
IN
V-
CIRCUIT 1.
LOGIC PIN
21k
+
33k ^1.2V-
CIRCUIT 2.
V+
GND.
V-
V+
OUT
V-
CIRCUIT 3.
V+
GND
V-
CAPACITIVELY
COUPLED
ESD CLAMP
CIRCUIT 4.
AC Test Circuits
ISL59440
R_G R_F
A_V = 1, 2
R_S
V_IN
50Ω
OR
C_L
475Ω
50Ω
OR
OR
75Ω
462.5Ω
75Ω
TEST
EQUIPMENT
50Ω
OR
75Ω
ISL59440
R_G R_F
V_IN
50Ω
OR
75Ω
A_V = 1, 2
R_S
C_L ^{50Ω OR 75Ω}
TEST
EQUIPMENT
50Ω
OR
75Ω
FIGURE 24A. TEST CIRCUIT FOR MEASURING WITH A 50Ω OR
75Ω INPUT TERMINATED EQUIPMENT
FIGURE 24B. BACKLOADED TEST CIRCUIT FOR VIDEO
CABLE APPLICATION. BANDWIDTH AND
LINEARITY FOR R_L LESS THAN 500Ω WILL BE
DEGRADED.
NOTE: Figure 24A illustrates the optimum output load when connecting to input terminated equipment. Figure 24B illustrates
backloaded test circuit for video cable applications.
8
FN6162.2
October 10, 2007