AN2458SH Color Encoder IC (NTSC/PAL) for CCD Video Camera ■ Overview Unit:mm The AN2458SH is a color encoder IC for NTSC/ PAL-compatible CCD video camera. It outputs chroma signal after modulation of inputted R–Y and B–Y color difference signals with subcarrier signals. 24 12 13 0.1 0.15 +– 0.05 1.5±0.2 0.1±0.1 • Compatible with NTSC and PAL • Carrier leak adjustment available • Built-in blanking circuit • Color phase adjustment available • Improved temperature characteristics of color phase shift (within ±5˚C) (0.5) 5.5±0.3 0.65±0.1 ■ Features 0.65±0.1 0.2±0.1 6.5±0.3 0.5 1 7.5±0.3 24-Pin SSOP Package (SSOP024-P-0300) ■ Block Diagrams VREF R–Y IN 24 23 R–Y OFF 22 21 HUE R–Y SC Cont. BF IN 20 19 18 DC. Cont. C 17 BLK. IN 16 15 BLK DC Cont. Clamp MOD CP2. IN 14 13 VCC CP2 NC NC VREF VCC CP2 + Lim. BLK BLK Clamp MOD MOD GC CP2 GC + HUE + NC 1 2 B–Y IN GND 3 4 5 6 B–Y OFF B–Y SC 90. ADJ 7 8 9 HUE.C HUE. BURST CR LEVEL 10 NC 11 12 CHROMA HUE.R OUT ■ Absolute Maximum Ratings Symbol Rating Supply voltage Parameter VCC 5.5 V Supply current ICC 25 mA PD 120 mW Topr –20 to +75 ˚C Tstg –55 to +125 ˚C Power dissipation Operating ambient temperature Note 1) Storage temperature Note 1) Unit Note 1) Ta=25˚C except operating ambient temperature and storage temperature. ■ Recommended Operating Range (Ta=25˚C) Parameter Symbol Range VCC 4.6V to 5.0V Operating supply voltage range ■ Electrical Characteristics (Ta=25±2˚C) min typ Supply current Parameter Symbol ICC VCC=4.8V, VREF=1.8V 12.0 16.0 20.0 mA CP2 threshold 1 VTH (CP2–1) VCC=4.8V, VREF=1.8V 1.5 1.8 2.1 V CP2 threshold 2 VTH (CP2–2) VCC=4.8V, VREF=1.8V 2.0 2.4 2.8 V BLK threshold VTH (BLK) VCC=4.8V, VREF=1.8V 1.9 2.2 2.5 V Terminal voltage Pin5 V5 –100 0 100 mV Terminal voltage Pin11 V11 VCC=4.8V, VREF=1.8V diffrence from VREF VCC=4.8V, VREF=1.8V 1.8 2.3 2.8 V VCC=4.8V, VREF=1.8V diffrence from VREF VCC=4.8V, VREF=1.8V 250mVP–P input VCC=4.8V, VREF=1.8V 250mVP–P input VCC=4.8V, VREF=1.8V 600mVP–P input VCC=4.8V, VREF=1.8V 250mVP–P input BLK=3VOP VCC=4.8V, VREF=1.8V V9=VREF VCC=4.8V, VREF=1.8V V9=VREF±0.5V VCC=4.8V, VREF=1.8V V9=VREF–0.5V VCC=4.8V, VREF=1.8V V19=VREF+0.5V VCC=4.8V, VREF=1.8V V19=VREF–0.5V –100 0 100 mV 480 600 720 mVP–P –7.0 –5.5 –3.5 dB 0.5 3.0 4.5 dB 300 600 900 mVP–P 290 350 430 mVP–P 1.5 3.0 4.5 dB –6.0 –4.5 –2.5 dB –45 –30 –15 deg 0 15 30 deg Terminal voltage Pin20 V20 R–Y GAIN GV1 B–Y GAIN GV2 CHROMA CLIP GV3 BLK CONTROL GV4 BURST GC (1) GV5 BURST GC (2) GV6 BURST GC (3) GV7 BURST PHASE (1) θ1 BURST PHASE (2) θ2 Condition max Unit ■ Application Circuit BLK (BLan King) IN BF (Burst Flag) IN CP2 (Clamp Pulse) IN VREF (typ.1.8V) HUE 27kΩ 50kB + 47µF 16.3V 10kB 0.047 µF 6400Ω 1kΩ 22µH 10kΩ VCC + 100µF 16.3V (typ.4.8V) 24 23 22 21 20 19 18 17 16 15 14 13 R–Ysig.IN AN2458SH 0.22µF 1 2 3 4 5 6 7 8 9 10 11 12 B–Ysig.IN 0.22µF *10pF 22 kΩ 10kΩ 10kB 6800Ω SC90˚IN 1500Ω 6800Ω 22 kΩ 6400Ω 0.001 µF 27kΩ SC0˚IN 1kΩ 1 kΩ 0.001 µF 1500Ω 50kB 90.Adj. 50kB Burst Level Chroma Level 1kΩ BPF CHROMA OUT * The phase-shift capacitor is typically 10 pF for both NTSC and PAL. ■ Pin Descriptions Pin No. Pin name Pin No. Pin name 1 2 Color difference (B–Y) input GND 13 Clamp pulse input 14 VCC (4.8V typ.) 3 N. C. 15 N. C. 4 Subcarrier (0˚) OFF 16 Blanking pulse input 5 Subcarrier(0˚) input 17 DC playback capacitor 6 90˚adjustment 18 Burst flag input 7 Phase-shift capacitor 19 Phase adjustment 8 Phase-shift capacitor 20 Subcarrier (90˚/270˚) input 9 Burst amplitude adjustment 21 Subcarrier (90˚/270˚) OFF 10 N. C. 1kΩ 22 N. C. 11 Chroma plus burst output 23 Color difference (R–Y) input 12 Phase-shift resistors 24 VREF (1.8V typ.)