TA1372FNG

TA1372FNG TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA1372FNG VHF Band RF Modulator IC for VCRs and Set top boxes The TA1372FNG is a VHF band RF modulator IC that features PLL-based RF carrier and sound intercarrier oscillation. There is no external parts of RF Oscillator and Sound Oscillator. Therefore, PCB design and adjustment with much time are not required. The TA1372FNG is compatible with CH 3 & CH 4 (U.S.A. channel) of NTSC television system. SSOP16-P-225-0.65B Weight: 0.07 g (typ.) Features • • • • • • • • RF Oscillator is all built in IC and external tank circuit is not required. (U.S.A. channels CH 3 & CH 4) Sound Oscillator is all built in IC and external tank circuit is not required. Formats supported: System M The Picture to Sound ratio is set up by external resistance. Muted RF output on power-on and as required. Reference signal can use 4MHz and 3.579545MHz. These modes are selected by pin 1. In Carrier off mode, Supply current is saved by stopping Sound VCO. There is White Clip Through Mode in test mode. Package is improved to Lead-Free 1 2003-12-25 TA1372FNG Block Diagram RF signal output 15 Antnna SW driver output 14 Sound PLL loop filter 12 N.C. 16 Analog VCC 13 A.VCC Digital VCC 11 D.VCC Sound VCO P/S ratio set up 10 Digital GND 9 D.GND Voltage Regulator Mixer RF Mod. Charge Pump Video Mod. Sound Counter Phase Comp. 20.8 kHz 1/4 White Clip RFCarrier OSC Reference Divider Programmable Divider X’tal OSC Clamp Charge Pump A.GND Phase Comp. 62.5 kHz 1 Reference signal mode selection 2 Video signal input 3 RF PLL loop filter 4 Analog GND 5 Sound signal input 6 Carrier off mode selection 7 4 MHz X’tal or External Reference signal input 8 Channel selection Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory purpose. 2 2003-12-25 TA1372FNG Pin Description (VCC = 5.0 V, Ta = 25°C) The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purpose. Pin No. DC Voltage AC Voltage (typ.) (typ.) Name Interface equivalent circuit Note D.VCC H: 5 V M: 2.5V L: 0 V D.GND ⎯ 1 120 kΩ 1 Reference signal Mode selection 10 kΩ Reference signal Mode can be selected this pin. High or Open: 4MHz external input mode Middle: 3.579545MHz external input mode Low: Internal Oscillation Mode with 4MHz X’tal A.VCC 3.1 V Sync tip clamp input. It is used by AC coupling. Video modulation depth is set by level of input signal on this pin. White clip level for IC is set internally for DC, but it will change by the high frequency-factor. 2 Video signal Input 2.4 V (sync tip) 500 mVp-p (80% modulation) 2 A.GND D.VCC 1 kΩ 1 kΩ RF oscillation frequency is compared with RF setting frequency(pin 8), and the error is outputted by Charge pump. LPF for high frequency rejection is connected to this terminal. And the voltage for RF VCO control is generated. 3 RF PLL loop filter ⎯ ⎯ 3 2 kΩ D.GND The reference frequency is 62.5 kHz. 4 Analog GND (0 V) ⎯ ⎯ Analog GND Sound modulation depth is set by level of sound signal input on this pin. Sound pre-emphasis is applied before this pin. This pin is also used for switching test mode. Normally this pin is used at 0 V DC (used by AC coupling). H: Test mode M: Test mode (White Clip through mode) L (open): Normal mode A.VCC 10 kΩ H: 5 V 5 Sound signal input 105 kΩ M: 2.5V L: 0 V (normal mode) 167 mVp-p (100% FM modulation) 5 2 kΩ A.GND 3 2003-12-25 TA1372FNG Pin No. Name DC Voltage AC Voltage (typ.) (typ.) Interface equivalent circuit Note D.VCC This terminal is selection of Carrier off-mode and Antenna SW driver output. High : Carrier ON Antenna SW High Low or Open : Carrier OFF 6 110 kΩ Carrier off mode selection H: 5 V L: 0 V ⎯ 6 10 kΩ D.GND Antenna SW Low 4.3 V (External input mode) 7 4 MHz X’tal 2.7 V (Internal oscillation mode) ⎯ D.VCC (Note1) 3.6 V 2 kΩ 2 kΩ 0.1 mA As reference signal, either 4-MHz crystal resonator can be connected to this pin for internal oscillation or external signal can be input. Reference signal Mode can be selected pin 1. 100 kΩ 7 (Note2) D.GND Note1: Internal oscillation mode OFF Note2: External input mode OFF D.VCC 120 kΩ This terminal is the selection of RF VCO oscillation frequency. Open or High : USA 3ch Low : USA 4ch D.GND ⎯ ⎯ H: 5 V 8 Channel select L: 0 V ⎯ 8 10 kΩ 9 Digital GND (0 V) Digital GND A.VCC 50 kΩ P/S ratio 10 set up 5V (Pin Open) ⎯ 80 kΩ 10 P / S ratio is set up by connecting resistance with this terminal between GND. A.GND ⎯ 11 Digital Vcc (5 V) Digital Vcc 4 2003-12-25 TA1372FNG Pin No. Name DC Voltage AC Voltage (typ.) (typ.) Interface equivalent circuit Note Sound VCO oscillation frequency is compared with 4.5MHz, and the error is outputted by Charge pump. LPF for high frequency rejection is connected to this terminal. And the voltage for sound VCO control is generated. D.GND ⎯ The reference frequency is 20.8 kHz. Analog Vcc D.VCC 1 kΩ 1 kΩ Sound PLL 12 loop filter ⎯ ⎯ 12 2 kΩ 13 Analog Vcc (5 V) Ａ.VCC This terminal is a driver output for an Antenna SW switching and controlled by the terminal 6. The maximum output current is 15mA. 14 Antenna SW driver output H: 4.1 V L: 0 V ⎯ 67 kΩ 14 D.GND A.VCC 15 RF signal output 3.2 V 93dBµV 550 Ω RF signal output pin. 15 Low-impedance emitter-follower output A.GND 16 N.C. ⎯ ⎯ ⎯ 5 2003-12-25 TA1372FNG Explanation in each mode 1. Reference signal Mode selection (Pin 1) As reference signal, either 4-MHz crystal resonator can be connected to this pin for internal oscillation or external signal can be input. Reference signal Mode can be selected pin 1. 4MHz and 3.579545MHz can be used for the frequency of an external input signal. Voltage of pin 1 High or Open Middle Low Reference signal mode 4MHz External input 3.579545MHz External input Internal oscillation with 4MHz X’tal 2. Test mode selection (Pin 5) Pin 5 is also used for switching test mode. Normally this pin is used at 0 V DC (used by AC coupling). White clip mode is prepared into test mode. ( e.g. when modulation characteristics for near-100% modulation are being checked.) Voltage of pin 5 High Middle Low or Open Mode Test mode White Clip through mode (Test mode) Normal mode If the voltage of a terminal 5 becomes more than 1.2V, it will change to the test mode. Be careful of the influence of a noise etc. 3. Carrier off mode selection (Pin 6) Pin 6 is selection of Carrier off-mode and Antenna SW driver output. In Carrier off mode, Supply current is saved by stopping Sound VCO. Voltage of pin 6 High Low or Open RF&sound oscillation ON OFF Antenna SW driver output (pin 14) High Low When changing a carrier ON, RF output is muted the time of about 130 msec. Mute of RF output is for avoiding the influence of the noise by RF carrier frequency being unstable. At the time of Channel switching, RF output is muted similarly. 4. Channel selection (Pin 8) Pin 8 is the selection of RF VCO oscillation frequency. Voltage of pin 8 High or Open Low Channel USA 3ch (61.25MHz) USA 4ch (67.25MHz) 5. P/S ratio set up (Pin 16) P / S ratio is set up by connecting resistance with pin 16 between GND. P / S ratio can be set as the range of –9dB to -17dB. 6 2003-12-25 TA1372FNG Maximum Ratings (Ta = 25°C) The absolute maximum ratings of a semiconductor device are a set of specified parameter values, which must not be exceeded during operation, even for an instant. If any of these rating would be exceeded during operation, the device electrical characteristics may be irreparably altered and the reliability and lifetime of the device can no longer be guaranteed. Moreover, these operations with exceeded ratings may cause break down, damage and/or degradation to any other equipment. Applications using the device should be designed such that each maximum rating will never be exceeded in any operating conditions. Before using, creating and/or producing designs, refer to and comply with the precautions and conditions set forth in this documents. Characteristics Supply voltage Power dissipation Input terminal voltage Operating temperature Storage temperature (Note 1) Symbol VCC PD VIN Topr Tstg Rating 6 810 GND − 0.3~VCC + 0.3 −20~75 −55~150 Unit V mW V °C °C Note 1: Power dissipation in the IC alone. If the device is operated at Ta > 25°C, this parameter must be derated by 6.5 mW per 1°C. 7 2003-12-25 TA1372FNG Electrical Characteristics (VCC = 5.0 V, Ta = 25°C, When there is no indication of conditions fp = 61.25 MHz) No. 1-1 1-2 Entire 1-3 IC 1-4 2-1-1 2-1-2 2-2 2-3 2-4 2-5 2-6 2-7 2-8 Video Block 2-9 2-10 Characteristics Supply voltage Operating frequency range Supply current 1 (Normal mode) Supply current 2 (Carrier off mode) Video RF output level Video RF output level (Difference of channel) Video modulation depth White clipping level Differential gain Differential phase Video S/N ratio Video frequency responce Average picture level drift Sync crush level Chroma beat Symbol Vcc fop Icc1 Icc2 Vo ΔVo mp mpMAX DG DP mpS/N fv mp(APL) Δsync Vc Min 4.5 61.25 38 2.5 90 -1.2 76 88 -5 -5 50 -2.4 -3 Typ. 5.0 45 3.5 93 0.2 80 92 0 0 51.5 -0.4 0 1 -75 Max 5.5 67.25 51 4.5 96 0.8 84 96 +5 +5 1.6 +3 3 -70 Unit V MHz mA mA dBμV dB % % % ° dB dB % % dB fp frequency Normal moe,IANT SW=0mA Carrier off mode 50-Ω termination, staircase (B/W) signal, 0.5-Vp-p input 50-Ω termination, staircase (B/W) signal, 0.5-Vp-p input, Vo(3ch) – Vo(4ch) White signal:0.5Vp-p input White signal:1.0Vp-p input 10-step staircase signal: 0.5-Vp-p input (chroma signal = 20 IRE), 9th step 10-step staircase signal: 0.5-Vp-p input (chroma signal = 20 IRE), 9th step 0.1 MHz~4.2 MHz, unweighted, 50% White signal input 0.1 MHz~4.2 MHz, referenced to 1 MHz 10%~90% APL, referenced to 50%, variation in video modulation depth {1 − (Vsync/Vwhite) × (100/40)} 3.58MHz sine wave: 0.5-Vp-p input, Referenced to video carrier level, P/S ratio = −16dB Referenced to video carrier level Referenced to video carrier level Referenced to video carrier level 1MHz sine wave: 0.5-Vp-p input, Referenced to fp+1MHz level, Level of fp+2MHz Reference frequency 4MHz, Internal oscillation mode, Series capacitance of crystal : 6pF Reference frequency 3.579545MHz, External signal input mode Note 2-11-1 2-11-2 2-11-3 2-12 Video RF 2nd harmonic Video RF 3rd harmonic Video RF 4th harmonic Video harmonic V2fp V3fp V4fp Vph - -35 -33 -55 -53 -30 -28 -50 -50 dB dB dB dB 2-13-1 Video carrier frequency accuracy 1 Video carrier frequency accuracy 2 Δfp4 -50 0 50 kHz 2-13-2 Δfp358 -0.008 - +34 kHz 8 2003-12-25 TA1372FNG No. 3-1-1 Characteristics Picture to Sound ratio Symbol RP/S Min -18 Typ. -16 Max -14 Unit dB Note P/S ratio: −16dB set-up, Connecting a 16k ohm resistor between pin 10 and GND. staircase (B/W) signal: 0.5-Vp-p input P/S ratio: −16dB set-up, Connecting a 16k ohm resistor between pin 10 and GND. staircase (B/W) signal: 0.5-Vp-p input, RP/S (3ch) –RP/S (4ch) P/S ratio: maximum set-up, Pin 10 is open. staircase (B/W) signal: 0.5-Vp-p input P/S ratio: minimum set-up, Pin 10 is connected to GND. staircase (B/W) signal: 0.5-Vp-p input 3-1-2 Picture to Sound ratio (Difference of channel) ΔRP/S -0.5 0 0.5 dB 3-2-1 Maximum P/S ratio RP/S max -11 -9 - dB 3-2-2 Minimum P/S ratio RP/S min - -18 -16 dB 3-3 3-4-1 Sound Block 3-4-2 Sound modulation sensitivity Sound S/N ratio 1 βFM S/N(FM1) 0.27 51 0.3 52.5 0.33 - kHz/mV 1-kHz sine wave: 167 mVp-p input βFM = ∆f (kHz)/ 167 (mV) dB 1-kHz sine wave input, ±25 kHz Dev. = 0dB, Inter Carrier demod., De-Emph = IN 1-kHz sine wave input, ±25 kHz Dev. = 0dB, Color bar signal: 0.5-Vp-p input, Inter Carrier demod., De-Emph = IN 1-kHz sine wave: ±25kHz Dev. 100 Hz~100 kHz, 1-kHz reference 1-kHz sine wave input, THD