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Video ICs
VIF / SIF signal processor for televisions and VCRs
BA7358S
The BA7358S is multi-format (M, B / G, D / K, and I) VIF / SIF signal processor for television and VCR applications. It features separate-carrier PLL with full synchronous detection and employs a pulse-count detector audio system that does notrequire adjustment. It also includes a sound trap band-pass filters that use our independently-developed filter technology. This IC reduces external component requirements, and allows space savings.
*Applications TVs and VCRs *Features 1) Separate-carrier PLL with full synchronous detection. Excellent DG / DP, CS beat (920kHz) and cross color. In addition, by pulling down the SIF input (pin 9) it can be used as an intercarrier. 2) The IF AGC time constant is dual-layered to allow faster speeds. 3) The variable-gain amplifier has excellent linearity to ensure low distortion, and AGC variance and temperature drift have been minimized. 4) Built-in SOUND filter (SOUND trap and SOUND BPF).The MODE switch can be used to switch between M, B / G, I, and D / K (4.5MHz, 5.5MHz, 6.0MHz, and 6.5MHz respectively). In particular, the SOUND BPF gives a larger attenuation ratio than conventional discrete circuits by using two-layer SIF + 500kHz BPFs. 5) The audio detector uses a 500kHz beatdown pulsecounter detector that does not require adjustment. This eliminates the need for a detector coil and gives better linearity and S / N. 6) Use of pulse-counter detection and the built-in SOUND filter means fewer pins, external components and adjustment locations are required. The IC is available in a 22-pin SDIP package and will enable cost and space savings.
*Absolute maximum ratings (Ta = 25C)
Parameter
Applied voltage Power dissipation Operating temperature Storage temperature Pin 2 applied voltage
Symbol VCCMax. PdMax. Topr
Limits 10.51 12502 - 15 ~ + 70 - 40 ~ + 150 10.5
Unit V mW C C V
Tstg
VP2Max.
1 24 resistor connected between VCC and Vreg. 2 When IC is stand alone, reduced by 10mW for each increase in Ta 1C over 25C.
*Recommended operating conditions (Ta = 25C)
Parameter
Power supply voltage (9V) Power supply voltage (12V) Guaranteed operating power supply voltage
Symbol VCC9V VCC12V VCC
Limits 8.8 ~ 9.21 11.7 ~ 12.32 8.5 ~ 9.51
Unit V V V
1 24 resistor connected between VCC and Vreg. 2 56 resistor connected between VCC and Vreg. 1
Video ICs
BA7358S
*Block diagram
AFTOUT
1
22
EQFLT
B/W INV
EQ AMP
RFAGC
2
21
VEQO
RF AGC
VIDEO AMP
AGCADJ
3
20 SIF TRAP AFT
PLLFLT
IF AGC
PLL DET
AGCFLT
4
19
AFTCOIL
GND1
5 + 45 SHIFT - 45 SHIFT
18
Vreg
VIFB
6 VIF AMP VIF AMP VIF AMP VCO
17
PLLCOILA
MODE
BIAS
SIF SW
VREG
VIFA
7
16
PLLCOILB
GND2
8 SIF AMP
15
MODE
SIF BPF
REF OSC
SIF
9
14
X5
FM DEMOD
AF AMP
LIM
LIM
10
500k BPF
AFC
13
AFOUT
VO4.5M
11
12
IR
2
Video ICs
BA7358S
*Pin descriptions
Pin No. Pin name Function AFT OUT RF AGC OUT RF AGC delay point adjustment IF AGC Filter VIF, BIAS GND VIF B IN VIF A IN SIF, PLL GND SIF IN / intercarrier switch Audio detector filter and A / V mute switch 2ndSIF OUT Filter bias resistor (within 1%) AUDIO OUT Filter system reference frequency oscillator MODE SW PLL oscillator coil PLL oscillator coil Vreg AFT COIL PLL phase detect filter Video out after EQ amplifier EQ Filter
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
AFTOUT RFAGC AGCADJ AGCFLT GND1 VIFB VIFA GND2 SIF AFC VO4.5M IR AFOUT X5 MODE PLLCOILB PLLCOILA Vreg AFTCOIL PLLFLT VEQO EQFLT
3
Video ICs
BA7358S
*Equivalent circuits
Pin No. Pin name IN / OUT Standard voltage Equivalent circuit
VCC 500
Function AFT output. Vreg / GND push-pull output.
1k
1
AFTOUT
OUT
--
1
500 GND
VCC 4k
2
RFAGC
OUT
--
2
RFAGC output. Open-collector output. Gain can be set using an external resistor (minimum value of the maximum sink current of pin 2 is 0.7mA). Keep the pin 2 voltage at 10.5V or less.
GND
VCC
4.5k
RF AGC delay point adjustment. Connect to GND via a variable resistor (approx. 100k).
3
AGCADJ
--
2.7V (when 100k resistor connected)
4k 3 1k 25.2k GND
VCC 400
For filter time constant for VIF AGC.
4
AGCFLT
--
5.0V
4
GND
5
GND1
--
0V
--
GND for VIF, AGC and AFT.
VCC and VCC2 in the equivalent circuit diagrams are connected to the Vreg terminal (pin 18).
4
Video ICs
Pin No. Pin name IN / OUT Standard voltage Equivalent circuit
VCC
BA7358S
Function Video IF input. Use with balanced input.
1k
1k
6 7
VIFB VIFA
5
IN
4.2V
7 5.8k 1k GND 5.8k
8
GND2
--
0V
--
VCC 15k
SIF and PLL GND.
20k
Audio IF input. Can set to intercarrier mode by pulling down via a 2k resistor.
9
9
SIF
IN
6.6V
17pF
15k GND
VCC
3.5V
10
AFC
--
2.7V
10 40k
Holding the audio output DC level fixed. Connect to GND via a 4.7F capacitor and to Vreg via a 10F capacitor to reduce buzz. Set this pin to 0.3V or lower to apply audio / video mute.
GND
VCC
11
Sound Filter 8k
11
VO4.5M
--
5.2V
2nd SIF output. Connect a trap to this pin to vary the sound filter characteristics. The internal impedance is a high (Approximately) 1k, so connect a buffer to output.
GND
5
Video ICs
Pin No. Pin name IN / OUT Standard voltage Equivalent circuit
VCC 64k
BA7358S
Function Reference current source for adjusting the internal filter. Use connected to GND via a 24k resistor. Use an accurate resistor with good temperature characteristics (e.g. 1% metal film).
12
IR
--
2.4V
12 500
12.7k
0.85p GND
VCC 200
Audio signal output. The standard output in the case of B / G is 520mVrms (when f = 50kHz). Connect to GND via a 10 k resistor.
13
AFOUT
OUT
3.2V
13 27k GND
VCC 500
14
X5
--
5.0V
14
400
For connection to a 5MHz oscillator (when M format is used). Use as a reference oscillator for automatic adjustment of the internal filter, and as the signal for the SIF signal low frequency conversion. (B / G, D / K format: 6MHz, I format: 6.5MHz).
GND
VCC 40k
Input for Trap Filter SW. 0V: M format (4.5MHz) 2.4V: D / K format (6.5MHz)
5k
15
MODE
IN
3.4V
15
4.3V: I format (6.0MHz)
50k 5k
Vreg: B / G format (5.5MHz)
40k GND
6
Video ICs
Pin No. Pin name IN / OUT Standard voltage Equivalent circuit
VCC
BA7358S
Function For connection of IF detector VCO oscillator coil.
1k
1k
200
16 17
PLLCOILA -- PLLCOILB 3.6V
16 17
GND
18
IF circuit power supply. Pin 18 has a built-in shunt regulator.
VIF SIF
18
Vreg
OUT
6.6V
GND2
VCC2 17k 17k 11k 1.5k 1.5k
For connection of AFT coil. To apply AFT defeat, connect to GND via a 1k (approx.) resistor.
19
AFTCOIL
--
3.0V
19
3.5k
3.5k GND2
VCC2 500 3.3V
Time constant circuit for the PLL filter.
20
PLLFLT
--
3.4V
20 30k 148k
40k
500
GND2
7
Video ICs
Pin No. Pin name IN / OUT Standard voltage Equivalent circuit
VCC 250 250
BA7358S
Function VIDEO output. Output is via the sound trap, B / W noise inverter, and EQ AMP. Connect to GND via a 4.7k resistor.
21
VEQO
OUT
2.0V (SYNC)
21
27k
GND
VCC 250 250
EQ Filter. Connect to GND via an LCR series resonant circuit. R should be 1k.
22
EQFLT
--
5.2V
22
1k 1k 1k
GND
8
Video ICs
BA7358S
*Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 9V, P = 38.9MHz)
Parameter Vreg
Supply current Regulated voltage
Symbol
Min.
Typ.
Max.
Unit
Conditions
ICC VREG
-- 6.2
96 6.6
110 7.0
mA V
-- --
VIF
Input sensitivity Maximum allowable input level AGC range Quiescent video output voltage Video detector output level Synchronous signal tip voltage Video output DG Video output DP Sound trap attenuation CS beat level Video output S / N White noise threshold voltage White noise clamping voltage Black noise threshold voltage Black noise clamping voltage RFAGC maximum sink current
VVMin. VVMax. GR VP21 VVO VP21SY DG DP M,B / G D / K, I GVOS I920 S / NV VWTH VWCL VBTH VBCL IP2SI
34 100 62 3.9 1.7 1.7 -- -- 33 28 37 47 4.7 2.9 1.1 2.6 0.7
40 110 70 4.3 2.0 2.0 2 3 45 45 44 53 5.0 3.0 1.4 2.9 1.2
46 -- -- 4.7 2.4 2.3 8 8 -- -- -- -- 5.3 3.5 1.7 3.2 --
dB dB dB V VP-P V % deg dB dB dB V V V V mA
VVO = - 3dB point VVO = + 1dB point VVO = 3dB range No signal, VP4 = VREG
Vi = 80dB, AM87.5%MOD 100% white video signal Vi = 80dB, AM87.5%MOD 3STEP video signal 20LOG (VOS / VO0.2M) P = 0, P / C = 4, P / S = 14dB
Vi = 90dB, 100% white CW = 70dB frequency variation and pin 21 voltage variation
CW = 100dB, AGCADJ = 100K
AFT
Maximum AFT voltage Minimum AFT voltage AFT detection sensitivity AFT defeat starting voltage AFT defeat voltage
VPIMax. VPIMin. Sf VAFTDET VIDEF
6.0 -- 35 -- 2.9
6.4 0.3 65 -- 3.3
-- 0.8 -- 1.2 3.6
V V
CW = 38.4MHz CW = 39.4MHz
mV / kHz CW frequency variation V V CW = 38.4MHz CW = 38.4MHz
9
Video ICs
Parameter PLL
PLL capture range 1 PLL capture range 2 PLL lock range 1 PLL lock range 2 VCO control sensitivity
BA7358S
Symbol Min. Typ. Max. Unit Conditions
fCU fCL fLU fLL
0.6 -- 0.6 -- 0.5
+ 1.2 - 1.2 + 2.0 - 2.0 1.3
-- - 0.6 -- - 0.6 --
MHz MHz MHz MHz kHz / mV fm = 400Hz, f = 50kHz 5% distortion fm = 400Hz, f = 50kHz fm = 400Hz, f = 50kHz fm = 400Hz, f = 50kHz f = 25kHz, AM30% VPIO = GND VPIO = GND -- -- Intermode P = 80dB, P / S = 20dB (use FET probe) CW = 80dB frequency variation
SIF P = 38.9MHz / 80dB S = 33.4MHz / 70dB--12dB (SAW Filter Loss)
Input sensitivity SIF maximum allowable input level FM detector output level Audio output S / N Audio output distortion AMR MUTE video output voltage MUTE audio output voltage MUTE start voltage Intermode switch voltage VO4.5M output level
VSMin. VSMax. VSO SNAF THD AMR VVMUTE VSMUTE VIOMUTE V9INT VVO4.5M
-- 80 350 52 -- 40 -- 2.3 -- 0.1 10
24 90 520 64 0.3 56 0.7 2.9 -- -- 20
33 -- 700 -- 1.5 -- 1.2 3.5 0.3 1.0 40
dB dB mVrms dB % dB V V V V mVP-P
MODE
MODE voltage (M) MODE voltage (B / G) MODE voltage (D / K) MODE voltage (I)
V15M V15BG V15DK V15I
-- 6.0 2.20 4.10
0 Vreg 2.40 4.30
0.5 -- 2.60 4.50
V V V V
REF - OSC = 5MHz REF - OSC = 6MHz REF - OSC = 6MHz REF - OSC = 6.5MHz
10
Video ICs
BA7358S
*Measurement circuit
Vreg 220k 0.01 AFT OUT 2.2 RF AGC 0.01 VG SAW F V9 0.01 SAW FILTER LOSS 12dB 2 100k 3 SWA 0.01 4 AGCFLT AFT COIL 19 0.033 47 5 GND1 Vreg 18 27 0.1 0.01 0.01 1:1 2 1 2 0.01 1 10 6 VIFB PLL COILA 17 7 VIFA PLL COILB 16 8 GND2 MODE 15 SWF 3 2 9 SWB SIF X5 14 SWE 1 10 SWC AFC AFOUT 13 105A 100 3 2 11 VO4.5M IR 12 SWD 1 VO4.5M 1 AGCADJ PLLFLT 20 AFT COIL 220k SWH 39H 47p 1 2k
2
1
AFTOUT
EQFLT
22
VCC 2 RFAGC VEQ0 21
4.7k
5.1k
0.68
150 1.3V SWG PLL COIL 1k 2 1 VCC (9V)
24.0k ( 1%) 0.01
2 6.5M 18p 6M 5M 95A AFOUT 18p 22p 1k VCC (9V) 5.1k M (7.5k) 1
Fig.1
11
Video ICs
BA7358S
*Application example
Vreg 4.7k D / K SW 2.7k VCC (9V) ALL OFF B / G M (7.5k) 100 AFT DEF SW 10p 22p 1k 5.1k RFOUT AFT VCC (9V) 39p PLL 6.5M MODE 24 0.1 47 6M 0.01 X5 17 16 15 14 13 12 0.1 IR 0.1 24k ( 1%) Vreg 470 VO4.5M 1k 1.2k I SW 9V 4.7k VEQ0 2k PLL-FLT 0.68 150 4.7k M SW
EQFLT 47p39H 4.7k
1k
Vreg 20 19 18
22
21 EQ AMP B/W INV
PLL DET
- 45 SHIFT
VCO
Vreg
MODE
REF OSC
10p
5M
AF AMP FM DEMOD
AFT
+ 45 SHIFT
BIAS
VIDEO AMP
SIF TRAP VIF AMP
SIF SW
SIF BPF
LIM
LIM RF AGC IF AGC VIF AMP VIF AMP 22k SIF AMP
VCC
500k BPF
1
2 4700 100k
3 0.1
4
5 4700
6
7
8 GND2 4700
9 SIF SW
10 AFC 4.7
10k 11 Vreg
22 / 12V
220k
4700
Vreg
GND1
220k
VIF IN AGCADJ RF AGC AGCFLT
0.1
SAW FILTER
SIF IN
AFT OUT
IF IN
SIF SW MODE SW SPLIT = FREE / INTER = GND SIF IN [9pin] DC
STANDARD
V / S C SPACING [MHz]
M 4.5 0 5.0
B/G D/K 5.5 6.6 6.0 6.5 2.4 6.0
4700
2k
6.0 4.3 6.5
MODE [V] OSC [MHz]
at Vreg = 6.6V
Fig.2
12
10
I
Video ICs
BA7358S
*Coil specifications
f = 38.0MHz 0236-JPS-134 Type name: S-7GC f = 38.9MHz 0236-JPS-121 Type name: S-7GC
3
4
VCO COIL
S
4-6 8T
3 2 1
4
S
4-6 8T
2 1
0.10
6
0.12
6
Tuning capacitance: 22pF RH SUMIDA
Tuning capacitance: 22pF RH SUMIDA
0236-JPS-137 Type name: S-7GC
0236-JPS-136 Type name: S-7GC
1-2 2-3 3T 3T AFT COIL
3 2 1 4 3 4
1-2 2-3 3T 3T
0.14
6
2 1
0.10
6
S
Tuning capacitance: 56pF RH SUMIDA
S
Tuning capacitance: 56pF RH SUMIDA
Note: Connect a 16.7pF capacitor between 4 and 6 when measuring in the case of the VCO COIL. Connect a 0pF capacitor between 1 and 3 when measuring in the case of the AFT COIL.
13
Video ICs
BA7358S
*Operation notesaudio and video output muting function (1) Simultaneous
It is possible to simultaneously mute the audio and video output by pulling the AFC filter terminal down. (2) AFT defeat function AFT defeat can be applied by pulling the AFT coil terminal down via a 1k resistor. (3) Recommended SIF input range for intercarrier mode P / S = 20 to 30dB (including SAW-FILTER). (4) IF input range for RF-AGC switching 60 to 95dB. (5) Intercarrier mode switching Intercarrier mode can be set by pulling the SIF terminal down via a 2k resistor. (6) IR terminal external resistor This resistor sets the filter system reference current, so use an accurate component that has good temperature characteristics.
*Electrical characteristic curves
1.5 POWER DISSIPATION :Pd (W) 1.25 1.0 Not mounted on a board 1.5 1.4375 POWER DISSIPATION :Pd (W) On a glass epoxy board 1.0
0.5
0.5
0
25
50
75
100
125
150
0
25
50
75
100
125
150
AMBIENT TEMPERATURE : Ta (C)
AMBIENT TEMPERATURE :Ta (C)
Fig. 3 Power dissipation
Fig. 4 Power dissipation
14
Video ICs
BA7358S
*External dimensions (Units: mm)
19.4 0.3 22 12 6.5 0.3
0.51Min.
3.4 0.2 3.95 0.3
1
11
7.62
0.3 0.1
1.778
0.5 0.1
0~15
SDIP22
15

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