GX214A Datasheet, PDF (4/5 Pages) Gennum Corporation – GX214A Monolithic 4x1 Video Multiplexer

TYPICAL PERFORMANCE CURVES FOR GX214A
V_S = ± 8V, C_L = 30pF, I_L = 3mA unless otherwise shown
5
0.0
4
-0.5
3
-1.0
2
-1.5
1
-2.0
0
-2.5
-1
-3.0
-2
-3.5
-3
-4.0
-4
-4.5
-5 ₁₁
10
1¹⁰0⁰ 0
FREQUENCY (MHz)
Fig. 2 Gain vs Frequency
-5.0 ₁₁
3
5
1¹⁰0
FREQUENCY (MHz)
Fig. 3 Phase vs Frequency
-20
-30
-40
-50
XTALK (AH)
-60
R_S=75Ω
-70
-80
IN 1,2
-90
-100
IN 0,3
OFF ISOLATION
R_L=15Ω
-110
-120
1
10
100
FREQUENCY (MHz)
Fig. 4 All - Hostile Crosstalk & Off-Isolation vs Frequency
0.05
0.04
0.03 ^{VIN=40 IRE}
0.02
0.01
dg
0.00
-0.01
-0.02
-0.03
dp
-0.04
-0.05
1¹
3
5
1¹⁰0
FREQUENCY (MHz)
Fig. 5 Differential Gain & Phasevs Frequency
+5V
FROM
NETWORK
ANALYSER ₇₅
1 _IN0
2 _AG
13
A0
A1 ¹²
CS ¹¹
OUT ¹⁰
LG ⁹
V_CC V_EE
0.1
1
4 _CLC110 ⁸
5
2.67k
TO
NETWORK
ANALYSER
14
8
+8V
-8V
0.1
-5V
*
*
* The power supply pins should be suitably decoupled with at least 0.1µF, high quality capacitors
All resistors in ohms, all capacitors in microfarads unless otherwise stated.
Fig. 6 Test Circuit
The TEST SET UP shown is for INPUT 0 tests. Similar circuitry is used for each input INPUT in order to test
FREQUENCY RESPONSE and PHASE DELAY. For OFF-ISOLATION, all switches are disabled (CHIP SELECT
= logic 1) and a second enabled GX214A is connected to the output bus. For ALL-HOSTILE CROSSTALK,
three OFF switches are driven from the generator and the fourth is terminated with a 75Ω resistor. For the
DIFFERENTIAL GAIN and PHASE tests, the output is AC coupled to the output amplifier and the input level
from the generator is modulated with a step signal varying between 0 volts DC and 0.714 volts DC.
520 - 5 - 1
4