ISL59832 Datasheet, PDF (10/14 Pages) Intersil Corporation – Dual Channel, Single Supply Video Reconstruction Filter with Charge Pump

ISL59832
Typical Performance Curves V_CP = V_S = 3.3V, C_F = 0.1µF, C_S = 0.22µF, C_FIL = 0.4µF, C_IN1= C_IN2 = 0.1µF, R_L1= R_L2 = 150Ω.
VIDEO SIGNAL
TIME SCALE = 5µs/DIV
OUT = 500mV/DIV
SYNC_OUT = 500mV/DIV
INPUT = NTSC VIDEO + 2Hz SQUARE WAVE
(BEFORE COUPLING CAPACITOR)
CHANNEL 1 OUTPUT
TIMEBASE = 1ms/DIV
INPUT: 500mV/DIV
OUTPUT: 500mV/DIV
SYNC_OUT
FIGURE 19. SYNC_OUT SIGNAL
FIGURE 20. LUMA CLAMP RESPONSE TO POSITIVE
TRANSIENT (CHANNEL 1)
INPUT = NTSC VIDEO + 2Hz SQUARE WAVE
(BEFORE COUPLING CAPACITOR)
CHANNEL 1 OUTPUT
TIMEBASE = 200µs/DIV
INPUT: 500mV/DIV
OUTPUT: 500mV/DIV
FIGURE 21. LUMA CLAMP RESPONSE TO NEGATIVE
TRANSIENT (CHANNEL 1)
INPUT = NTSC S-VIDEO (CHROMA) + 2Hz SQUARE WAVE
(BEFORE COUPLING CAPACITOR)
TIMEBASE = 2ms/DIV
INPUT: 500mV/DIV
OUTPUT: 500mV/DIV
CHANNEL 2 OUTPUT
FIGURE 22. CHROMA CLAMP RESPONSE TO POSITIVE
TRANSIENT (CHANNEL 2)
INPUT = NTSC S-VIDEO (CHROMA) + 2Hz SQUARE WAVE
(BEFORE COUPLING CAPACITOR)
CHANNEL 2 OUTPUT
TIMEBASE = 2ms/DIV
INPUT: 500mV/DIV
OUTPUT: 500mV/DIV
FIGURE 23. CHROMA CLAMP RESPONSE TO NEGATIVE
TRANSIENT (CHANNEL 2)
100
RMS NOISE = 1.31mV
OUTPUT REFERRED
10
CHARGE PUMP NOISE,
CONTRIBUTES ONLY A SMALL
1
PERCENTAGE OF THE
OVERALL NOISE
0.1
0.01
0M
2M 4M 6M 8M 10M 12M 14M 16M 18M 20M
FREQUENCY (Hz)
FIGURE 24. NOISE SPECTRUM
10
FN6267.1
June 11, 2008