ICs for TV AN5637 SECAM decoder IC ■ Overview Unit : mm 19.2±0.3 16 9 1 8 6.2±0.3 The AN5637 is a chroma signal processing circuit for use in SECAM system. It outputs the color difference signal. 5.20±0.25 ■ Applications • SECAM system TV (0.71) Seating plane 2.54 0.5±0.1 1.22±0.25 1.10±0.25 3.05±0.25 • Built-in bell filter, deemphasis circuit • One point adjustment • Small number of external components 3.55±0.05 ■ Features 7.62±0.25 5° 3° to 1 +0.10 0.30 – 0.05 DIP016-P-0300D 1 2 SECAM/Non-SECAM R−Y Amp. B−Y Amp. Output Filter Phase Det. (VBLK,BGP,Signal) Current shift Output Filter Limiter Amp. Amp. B V De-Emp. ICO Loop Filter V/I conversion Limiter Amp. V V/I conversion B 7 External discrimination B Bell Filter 2 ACC Det. ACC Amp. Bell Mon. Inversion IH FF V Band Gap SECAM/Non-SECAM Internal discrimination Reset pulse generation ID discrimination 11 1 16 Bell Ref. V B Killer Mon. ID/fref C-In V Limiter Amp. B VBLK generation BGP generation H.VBLK generation 12 13 14 N.C. N.C. N.C. 15 SCP In AN5637 ICs for TV ■ Block Diagram 3 6 8 VCC GND 5 PLL Ref. 4 10 −(B−Y) Out 9 −(R−Y) Out ICs for TV AN5637 ■ Pin Descriptions Pin No. Description 1 Pin No. Description 8 PLL filter automatic adjustment sample Reference frequency signal/ Ident input pin hold pin 2 Bell filter output monitor pin 9 − (R−Y) output pin 3 Power supply pin 10 − (B−Y) output pin 4 Black level adjustment voltage input pin 11 Killer voltage monitor pin 5 6 7 Black level adjustment reference voltage 12 N.C. output pin 13 N.C. Grounding pin 14 N.C. Bell filter automatic adjustment sample 15 Sand castle pulse input pin hold pin 16 SECAM signal input pin ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VCC 11.0 V ICC 73 mA PD 777 mW Topr −20 to +70 °C Tstg −55 to +150 °C Supply voltage Supply current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Note) *1 : Ta = 25 °C except operating ambient temperature and storage temperature. *2 : Power dissipation of the package at Ta = 70 °C. ■ Recommended Operating Range Parameter Supply voltage Symbol Range Unit VCC 7.2 to 9.9 V ■ Electrical Characteristics at VCC = 9 V, Ta = 25 °C Parameter Symbol Conditions Min Typ Max Unit Power supply Supply current I3 Current when VCC = 9 V 30 40 50 mA Pin voltage V5 Voltage when VCC = 9 V 2.9 3.2 3.5 V 3 AN5637 ICs for TV ■ Electrical Characteristics at VCC = 9 V, Ta = 25 °C (continued) Parameter Symbol Input(Pin16) Min Typ Max Unit Typical input : (Pin16) Color bar signal, (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Input dynamic range VDR16 Composite signal input amplitude range 1.0 1.5 V Chroma signal input amplitude *1 Vch.16 Chroma signal input amplitude range 300 mV[p-p] DC measurement 17 25 33 kΩ Input impedance Z16 Bell filter Typical input : (Pin16) 4.0 MHz to 4.6 MHz sine wave 10 mV[p-p], (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Bell adjusting voltage Center frequency Band width VADB Sample hold pin voltage at bell filter automatic adjustement fOB Center frequency of bell filter (Signal period) B ACC Band width of bell filter (Signal period) 2.8 3.9 5 4.202 4.262 4.322 250 310 370 V MHz kHz Typical input : (Pin16) Color bar signal (Composite) 1 V[p-p], (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period ACC characteristics 1 ACC1 Output change amount when discrimination signal changes from 150 mV[p-p] to 300 mV[p-p] −6 0 6 % ACC characteristics 2 ACC2 Output change amount when discrimination signal changes from 150 mV[p-p] to 15 mV[p-p] −6 0 6 % Demodulator/Output Typical input : (Pin16) Color bar signal (Composite) 1 V[p-p], (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period PLL adjusting voltage VADV Sample hold pin voltage at PLL automatic adjustement 3.1 3.7 4.3 V R−Y output amplitude VRY Color bar (Composite) signal input (1 V[p-p]) 0.85 1.00 1.15 V[p-p] B−Y output amplitude VBY Color bar (Composite) signal input (1 V[p-p]) 1.07 1.27 1.47 V[p-p] Detector output linearity LO Color bar (Composite) signal input (1 V[p-p]) −6 0 6 % 1.12 1.27 1.42 Times R−Y/B−Y output ratio Black level adjusting voltage Black level error (R−Y) *2 (R−Y)(B−Y) Amplitude ratio of VRY and VBY *2 VAD4 Pin4 voltage when difference of B−Y black level becomes 0 1.45 2.1 2.75 V fBER Value referred to input frequency 10 kHz Note) *1 : Refer to "Explanations of testing method 1" *2 : Refer to "Explanations of testing method 2" 4 Conditions ICs for TV AN5637 ■ Electrical Characteristics at VCC = 9 V, Ta = 25 °C (continued) Parameter Symbol Demodulator/Output (continued) Conditions Min Typ Max Unit Typical input : (Pin16) Color bar signal (Composite) 1 V[p-p], (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Blanking period output DC voltage VBLK Stable sine wave is necessary in V period (4.4336 MHz) 2.2 2.7 3.2 V SN ratio *3 S/N Amplitude ratio when Deviation = 460 kHz/0 kHz (Pin10 measurement) 30 dB Residual high frequency amplitude VRH Harmonic content with 100 % white signal input (Pin10 measurement) 10 mV[p-p] Output impedance (when SECAM) Pin9 ZOS9 DC measurement, Pin1 = 5 V 260 460 660 Ω Output impedance (when non SECAM) Pin9 ZON9 DC measurement, Pin1 = 1.5 V 1 MΩ Output impedance (when SECAM) Pin10 ZOS10 DC measurement, Pin1 = 5 V 260 460 660 Ω Output impedance (when non SECAM) Pin10 ZON10 DC measurement, Pin1 = 1.5 V 1 MΩ Sand castle pulse Horizontal and vertical BLK level Burst gate level *5 Reference signal/interface Typical input : (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period *4 VBL Measurement of slice level of H, V blanking pulse 0.5 1 1.5 V VBG Measurement of slice level of burst gate pulse 3.4 3.9 4.4 V Typical input : (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Reference signal amplitude Vref Amplitude range of sine wave (4.43362 MHz) of Pin1 input 0.20 0.50 V[p-p] System SW discrimination level VSS Voltage when Pin10 becomes open if Pin1 is 5 V to 1 V variable 2.5 3.0 3.5 V IDENT Typical input : (Pin16) Color bar signal (Chroma), (Pin15) Sand castle pulse, (Pin1) 4.43362 MHz sine wave 350 mV[p-p], V-BLK period Color On/Off hysteresis HC Difference between color turn On or Off and Off to On level 0.5 2 6 dB Killer sensitivity K Color turn Off level when discrimination signal changes 150 mV[p-p] to 0 mV[p-p] −32 dB Note) *3 : Refer to "Explanations of testing method 3" *4 : Refer to "Explanations of testing method 4" *5 : Refer to "Explanations of testing method 5" 5 AN5637 ICs for TV ■ Electrical Characteristics at VCC = 9 V, Ta = 25 °C (continued) • Design reference data Note) The characteristic values below are theoretical values for designing and not guaranteed. Parameter Symbol Conditions Min Typ Max Unit ISS Sink current of Pin1 when SECAM signal input 150 175 220 µA Center frequency power supply voltage dependency ∆fOB/ ∆VCC Amount of center frequency fluctuation when VCC = 7.2 V to 9.9 V 0.23 kHz/V Center frequency ambient temperature dependency ∆fOB/ ∆T Amount of center frequency fluctuation when Ta = 30 °C to 80 °C 0.25 kHz/°C Output signal bandwidth BS Bandwidth of demodulator output signal (Pin9, 10) 1.3 MHz Deemphasis pole-frequency fPD Automatic adjustment period 85 kHz Pole zero point frequency ratio fPD/fOD Automatic adjustment period 3 Times R−Y output amplitude power supply voltage dependency ∆VRY/ ∆VCC Fluctuation amount of R−Y output amplitude when VCC = 7.2 V to 9.9 V 1.5 % R−Y output amplitude ambient temperature dependency ∆VRY/ ∆T Fluctuation amount of R−Y output amplitude when Ta = −30 °C to +80 °C 0.36 mV[p-p] /°C B−Y output amplitude power supply voltage dependency ∆VBY/ ∆VCC Fluctuation amount of B−Y output amplitude when VCC = 7.2 V to 9.9 V 2.0 % B−Y output amplitude ambient temperature dependency ∆VBY/ ∆T Fluctuation amount of B−Y output amplitude when Ta = −30 °C to +80 °C 0.55 mV[p-p] /°C Black level error (R−Y) power supply voltage dependency ∆fBER/ ∆VCC Fluctuation amount of black level error (R−Y) when VCC = 7.2 V to 9.9 V 1 kHz/V Black level error (R−Y) ambient temperature dependency ∆fBER/ ∆T Fluctuation amount of black level error (R−Y) when Ta = −30 °C to +80 °C 50 Hz/°C Black level error (B−Y) power supply voltage dependency ∆fBEB/ ∆VCC Fluctuation amount of black level error (B−Y) when VCC = 7.2 V to 9.9 V 2 kHz/V Black level error (B−Y) ambient temperature dependency ∆fBEB/ ∆T Fluctuation amount of black level error (B−Y) when Ta = −30 °C to +80 °C 90 Hz/°C Reference signal/interface Sink current Bell filter Demodulator/Output 6 ICs for TV AN5637 ■ Electrical Characteristics at VCC = 9 V, Ta = 25 °C (continued) • Explanations of testing method 1. Measurement of B−Y discrimination signal amplitude 2. Pin15 Pin9 Pin10 ∆VR ∆VB Input 100 % white signal and adjust the voltage of Pin4 so that ∆VB becomes 0 mV. Let the adjusted voltage be VAD4. And let the value of ∆VR based on input frequency at that time be fBER , black level error (R−Y). 3. Calculate by using the value of Pin10 (B−Y) output amplitude VBY when the color bar signal (Deviation = 460 kHz) is input to Pin16 and the value of Pin10 output VNOISE when the color bar signal (Deviation = 0 Hz) is input. S/N = 20 log10VBY/VNOISE 4. The horizontal and vertical blanking level VBL is determined by the internal stabilizing power supply circuit. 5. The burst gate level VBG is determined by dividing the IC built-in resistor between VCC-GND. VBG = VCC × 3.8/9 (typ.) 7 AN5637 ICs for TV ■ Terminal Equivalent Circuits Pin No. Equivalent circuit 1 VCC 150µA 100µA 200µA To AN5192/95 200Ω 1 Mode changeover SECAM /Non-SECAM discrimination 3.7V 20kΩ 1.5kΩ 1.5kΩ 0/175µA 2 Description Voltage Reference frequency signal/ Ident input Pin : • Input and output pin for interfacing with AN5192/95. • The circuit becomes non-SECAM mode if DC voltage of Pin1 becomes 3 V or less. • Current of 175 µA sinks into Pin1 in SECAM. AC + DC DC 1.1 V or 4.4 V AC 350 mV[p-p] or 0 0/175µA Bell filter output monitor pin VCC AC + DC DC 4.3 V 2 200Ω AC 200 mV[p-p] 200µA 200µA 3 4 Power supply pin VCC 5 4 6.8kΩ 10kΩ 0.01µF Black level adjustment DC : 9 V Black level adjustment voltage input pin : DC • Monitoring −(B−Y) Out (Pin10), 1.45 V to 2.75 V adjust Pin4 voltage so that pedestal step difference becomes 0. (using external volume) • Pin4 voltage is generated by resistor dividing Pin5 voltage so as not to be affected by VCC and temperature fluctuation. 15kΩ 100µA 200µA 5 Black level adjustment reference voltage VCC output pin 3.2V 5 100µA 100µA 400µA 8 DC : 3.2V ICs for TV AN5637 ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit 6 7 Description Grounding pin VCC 300Ω 200Ω Voltage DC : 0 V Bell filter automatic adjustment sample hold pin DC 2.5 V to 5.0 V PLL automatic adjustment sample hold pin DC 3.6 V to 3.9 V 200Ω 37.5kΩ 300Ω 1mA 8 100µA 7 100µA VCC 750Ω 200Ω 200Ω 1.5kΩ 1.5kΩ 750µA 8 100µA Pin9 ; −(R−Y) output pin 9 10 AC + DC Pin10 ; −(B−Y) output pin VCC AC −(R−Y) 10 9 200Ω −(B−Y) 100µA 200µA DC : 2.9 V 9 AN5637 ICs for TV ■ Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description 11 Killer voltage monitor pin VCC 100µA Voltage DC 1.5 V to 5 V When SECAM more than 4 V When non-SECAM 3 V 200Ω 500Ω Killer circuit 20kΩ 11 150µA 12 N.C. 13 N.C. 14 N.C. Sand castle pulse input pin AC 15 VCC 4.7V 2.4V 0V 200Ω 15 50µA 50µA 16 SECAM signal input pin VCC 50kΩ 10pF 5kΩ 200Ω 16 50kΩ 40kΩ 2.8V 100µA 10 40kΩ 200µA 200µA AC 1.0 V[p-p] ICs for TV AN5637 −(R−Y)Out −(B−Y)Out 9 8 10 7 PLL Ref. Bell Ref. GND 1µF 220nF 11 6 VC 12 N.C. 15kΩ 10kΩ 6.8kΩ Reg.1B 5 13 N.C. 4 10µF 0.01µF VCC 9V 0.01µF Reg.Adj. 14 Bell 3 N.C. SCP Sand Castle Pulse In 75Ω 15 fREF/ID 2 SECAM 1 Signal In 16 NP 2.2µF CVBS ■ Application Circuit Example Note) The following signal is inputted to Pin1 from the AN5192/95. • System discrimination 1. Pin1 is the input and output pin for the three pieces of information (1) Reference frequency signal input pin (AC) (2) System discrimination signal input pin (DC voltage) (3) SECAM/Non-SECAM discrimination output pin (DC current) AN5637 System discrimination SECAM Non-SECAM Pin1 input DC voltage Pin1 sink current Pin9, 10 output "H" (4.6 V) 175 µA Color difference signal output "L" (1.3 V) 175 µA Open "H" (4.6 V) 0 µA DC voltage output "L" (1.5 V) 0 µA Open 2. Reference frequency signal The reference frequency signal input for Pin1 is used for the following 4 signals ; (1) Bell filter automatic adjustement (2) PLL(VCO) automatic adjustement (3) Deemphasis automatic adjustement (4) Ident discrimination Be sure to input the high precision PAL carrier signal (4.43362 MHz) only in the vertical retrace period. 11