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Video IF with FPLL, MAC State and Vision Carrier Output
Preliminary Data
TDA 6051-5X
Bipolar IC
Features
q Active multistandard video IF
with FPLL demodulator
q 12-MHz bandwidth q MAC state q Picture carrier output for TDA 6048-5X
P-DSO-20
Type TDA 6051-5X
Ordering Code Q67000-A5125
Package P-DSO-20 (SMD)
Functional Description Multistandard video IF with FPLL and IF-carrier output to work in conjunction with TDA 6048-5X.
Application Multistandard TV/VTR and cable converters with mono or stereo applications.
Semiconductor Group
73
06.94
TDA 6051-5X
Circuit Description The IF circuit consists of a four-stage capacitively coupled and symmetrically designed controlled amplifier and a real synchronous demodulator with a FPLL-carrier regeneration. Two IF inputs can be selected for applications with different SAWs. The main performance of the device is the very low differential phase DP and gain DG combined with an excellent intermodulation ratio. The positive video output is used to derive the IF and tuner control voltage. The AGC threshold is set by means of a potentiometer. Dependent on the modulation polarity the video signal and the AGC are switched over. MAC state can be selected by an additional signal.
Pin Functions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Function IF input 1a IF input 1b IF switch Tuner AGC output Tuner AGC threshold Main AGC-time constant Mean value AGC-time constant Positive/negative modulation switch Video carrier output Video carrier output FPLL-VCO (2 x video carrier) FPLL-VCO (2 x video carrier) FPLL-loop filter FPLL-loop reference Video output MAC-standard switch + VS supply voltage Ground IF input 2a IF input 2b
Semiconductor Group
74
TDA 6051-5X
Block Diagram
Semiconductor Group
75
TDA 6051-5X
Absolute Maximum Ratings TA = 0 to 70 C Parameter Supply voltage Junction temperature Storage temperature Thermal resistance (system-air) Operating Range Supply voltage Supply voltage delayed tuner AGC IF-frequency range Ambient temperature during operation Symbol min. Limit Values max. 13.2 150 - 40 125 77 V C C K/W 0 Unit
V17 Tj Tstg Rth SA
V17 V5 fIF TA
10.8 0.8 12 - 10
13.2 12 80 85
V V MHz C
Semiconductor Group
76
TDA 6051-5X
DC Characteristics TA = 0 to 70 C; VS = 12 V Parameter Total current consumption IF input IF switch H or open = IF 1 L = IF 2 Standard switch H level L level B/G standard L standard MAC standard AGC Voltage Min. AGC Max. AGC Symbol - I17 Limit Values min. typ. 51 5.7 120 2.0 0.0 120 2 0 6.0 210 6.3 260 5.0 1.0 260 5 1 max. mA V A V V A V V Unit Test Condition
V1, V2, V19, V20
I3
V3 = 0 V, 5 V
V3 V3
I8 I16 V8, V16 V8, V16
210
V8, V16 = 0 V, 5 V
V8 = H V16 = H V8 = L V16 = H V8 = H V16 = L
V6 V6
0.0
0.1 2.8
0.5 4.0
V V
V1-2, V19-20 = 0 Vrms V1-2, V19-20 = 150 mVrms
AGC-Time Constant with Neg. Modulation Charge current Discharge current Charge/discharge ratio
I6
- I6 I6
1.1 13 55
1.4 18 82
1.9 23 140
mA A
V6 = 2.0 V, V15 3.2 V V6 = 2.0 V, V15 4.2 V
AGC-Time Constant with Pos. Modulation Charge current Discharge current Discharge current (Average control) Charge/discharge ratio
I6
- I6 - I6 I6
1.1 0.15 70 4000
1.4 0.25 85 5600
1.9 0.35 120 9000
mA A A
V6 = 2.0 V, V15 7.0 V V6 = 2.0 V, 5.2 V < V15 < 6.5 V V6 = 2.0 V, V15 < 3.9 V
Mean Value Generation with Pos. Modulation White level Zero carrier level
V7 V7
4.9 3.3
5.7 3.7
6.5 4.1
V V
V1-2, V19-20 = 10 mVrms V1-2, V19-20 = 0 Vrms
Semiconductor Group
77
TDA 6051-5X
DC Characteristics (cont'd) Parameter Symbol Limit Values min. Tuner AGC threshold V5 typ. 4.7 850 3.1 0.4 18 max. 5.0 1050 3.4 0.5 30 10 V A V V mA A 4.4 650 2.8 0.3 10 0 Unit Test Condition
I5 V6 V6
Tuner AGC current max. 1 ms - I4 - I4
R5-18 V5 = 0 R5-18 = 10 k R5-18 = 10 V4 = 0.5 V17, V5 = 0.75 V V1-2, V19-20 = 100 mVrms V4 = 0.5 V17, V5 = 4 V V1-2, V19-20 = 10 mVrms
FPLL VCO-tank circuit Loop reference Video carrier output
V11, V12 V14 V9, V10
3.4 2.1
3 3.8 2.5
4.1 3.2
V V V
Video Output Negative Modulation Output current - I15 1.9 4.0 3.3 6.3 2.5 3.3 mA mA V V
V15 = 5.0 V, V1-2, V19-20 =
10 mVrms, no modulation to ground via R = 500 V1-2, V19-20 = 10 mVrms, no modulation V6 = 3 V, V1-2, V19-20 = 0 Vrms
Sync pulse level Zero carrier level
I15 V15 V15
3.7 7.0
4.1 7.7
Video Output Positive Modulation (L standard) White level Zero carrier level
V15 V15
6.0 3.3
6.7 3.7
7.4 4.1
V V
V1-2, V19-20 = 10 mVrms,
no modulation V6 = 3 V, V1-2, V19-20 = 0 Vrms
Semiconductor Group
78
TDA 6051-5X
AC Characteristics TA = 0 to 70 C; VS = 12 V Parameter Min. IF-input voltage (min. AGC) Max. IF-input voltage (max. AGC) IF-control range Video output Changes via control range Changes via supply voltage range Design Notes IF-input resistance symmetrical IF-input capacitance symmetrical VCO voltage Video carrier output resistance (symmetrical) Video or sound output resistance Video noise voltage ratio Video bandwidth Differential gain Differential phase Symbol Limit Values min. typ. max. 60 Vrms mVrm s dB 3.3 6 4 Vpp % % 45 100 70 3.0 3 2 Unit Test Condition
V1-2, V19-20 V1-2, V19-20 90
V 63 2.7
V15
V15 V15
V1-2, V19-20 = 10 mVrms R15-18 = 1.5 k
Control range = 55 dB 10.8 V < V17 < 13.2 V
R1-2, R19-20 1.5 C1-2, C19-20 V11-12 V 9-10 R 15 S/N B - 3 dB DG DP
12
2 2 700 100 70 60
2.5 5
k pF mVpp
125
dB MHz CCIR Rec 567-1
5 2.5 60
%
o
V1-2, V19-20 = 10 mVrms V1-2, V19-20 = 10 mVrms V1-2, V19-20 = 10 mVrms
Intermodulation ratio a IM f IM = 1.07 MHz = f TT - f FT sound porch = - 20 dB Intercarrier noise
dB
S/N
54
dB
V1-2, V19-20 = 10 mVrms,
CCIR 468 FuBK, m = 100 % sound porch = - 13 dB
Varactor diode Varactor diode
C 11, 12 C 11, 12
15 7
pF pF
V13 = 2.5 V V13 = 4.9 V
Semiconductor Group
79
TDA 6051-5X
Test Circuit
Semiconductor Group
80
TDA 6051-5X
Application Circuit
Semiconductor Group
81

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