VT4T5UF2021
COMB4-1
RF Data Sheet
Combination Tuner/Demodulator/Modul ator
FEATURES
• Receiving Standard: USA
• Receiving Channels:
–VHF Section
– Low Band – Air: 2 to 6 CATV: (A-8) A-5 to B
– High Band – Air: 7 to 13 CATV: C to W + 11
– UHF Section
– Air: 14 to 69
– CATV: W + 12 to W + 84
• Sending Channels:
– USA Channel 3 and 4
– CH 3: OPEN
– CH 4: GND
• Receiving and Sending System: USA Standard
M-System (NTSC)
• Channel Selection System: PLL Tuning
• Detection System: Dum my Synchronization Detec-
tion System, Intercarrier Sound Receiving System
• Nominal Input Impedance:
–RF: 75 Ω, Unbalanced
– Video: 1 kΩ, Unbalanced
– Audio: 4.7 Ω MIN., Unbalanced
– Control: 30 kΩ MIN., Unbalanced
• Output Load Impedance:
–RF: 75 Ω
– Video: 1 kΩ
– Audio: 4.7 kΩ
• Intermediate Frequency:
– Picture: 45.75 MHz
– Sound: 41.25 MHz
• Weight: 72 g ±10 g
• Applicable Standards:
– EIA Standard Number 544
– EIA Standard Number 16A
– FCC Standards
– UL Standard
FUNCTIONAL DESCRIPTION
The VT4T5UF2021 is a combination tuner, demodulator and modulator in one package. This unit is compatible with North Am erican NTSC televisi on broadcast
signals. An internal Phase-Locked Loop circuit performs all of the required tuning functions. Digital control
information is provided to the unit on I2C serial data
bus. The tuner and demodulator blocks are internally
connected, providing an IF sample point for test purposes. The modulator has s eparate video and audio
inputs and control connections. This single package
configuration is useful when there is no need to manipulate the AGC or IF signals prior to demodulation, and
provides for a simplified system design. The RF connectors are mounted on the end of the housing so thatthe smallest possible area is used on the rear panel of
the end product.
The RF pass-through feature is electrically controlled
via an external interface pin. Outp ut channel 3 or 4 is
also electrically selected by asserting 5 V or ground on
an external pin. The internal tuner sample point is
always active, allowing the tuner and demodulator functions to be used at all times, regardless of the condition
of the RF pass-through and the modulator outpu t.
Demodulated au dio, video AGC and AFT outputs a re
also provided. The AGC control line from the demodulator to the tuner is not accessib le to the system desig ner.
RF Data Sheet 1
VT4T5UF2021 Combination Tuner/Demodulator/Modulator
ANT
IN
VIDEO
IN
AUDIO
IN
U/V SEPARATE
FILTER
DISTRIBUTOR
VIDEO
CLAMPER
SAW
RESONATOR
PRE-EMPHASIS
UHF
CIRCUIT
VHF
CIRCUIT
INPUT
TUNING
INPUT
TUNING
WHITE
CLIPPER
CH.
SW
AMP
RF
AMP
RF
AMP
MODULATOR
RF
CARRIER
OSC
FM
MODULATOR
4.5 MHz
TANK
INTERSTAGE
TUNING
CIRCUIT
INTERSTAGE
TUNING
CIRCUIT
HPFRF SW
RF SW
BPF
U/V ONE CHIP AND IC
MIX
OSC
~
IF
AMP
OSC
~
TV OUT
RESONANCE
CIRCUIT
IF TUNING
CIRCUIT
RESONANCE
CIRCUIT
PRE-AMP
PLL CIRCUIT
SIF
TRAP
SIF
FILTER
SAW
FILTER
DET
OUT
RF AGC
SF IN
DEMODULATOR
IC
Figure 1. VT4T5UF2021 Block Diagram
VIDEO AMP
VIDEO OUT
AUDIO OUT
AFT OUT
AFT MUTE
COMB3-6
2 RF Data Sheet
Combination Tuner/Demodulator/Modulator VT4T5UF2021
XΣxi n
⁄
=
S
Σ
Xi x
–
()
2
n2
–
()⁄
n10*=,=
(Tested channels including worst)
XΣxi n
⁄
=
XΣxi n
⁄
=
S
Σ
Xi x
–
()
2
n2
–
()⁄
n10*=,=
(Tested channels including worst)
ELECTRICAL CHARACTERISTICS
• Nominal Supply Voltage (TYP.)
–BM: 5 V
– BT: 33 V
–BP: 5 V
– B: 5 V
• Operating Voltage (TYP.)
– BM: 5V ±0.2 V
– BT: 33 V ±2.0 V
– BP: 5 V ±0.5 V
– B: 5 V ±0.5 V
– Control: 5 V ±0.2 V
• Breakdown Voltage (MIN.)
– BM: 5.5 V
– BT: 34 V
–BP: 5.5 V
– B: 5.5 V
• Test Conditions (TYP.)
–BM: 5 V
– BT: 33 V
–BP: 5 V
– B: 5 V
– Ambient Temperature 25°C ±5°C
– Relative Humidity 65% ±10%
• Current Consumption (MAX.)
– BM: 1.0 mA
–BT: 5 mA
– BP: 70 mA
– B: 40 mA
• Temperature (TYP.)
– Storage -20°C to +70°C
– Operating -10°C to +60°C
• RF Output (Video Sys tem). Measured by standard
demodulator input 1 Vp-p.
– Modulation Factor 80% (TYP.), 80 ±5%
– Differential Gain 2% (TYP.), 7% (MAX.)
– Differential Phase 1.5° (TYP.), 8° (MAX.)
– S/N Ratio 55 dB (TYP.), 48 dB (MIN.)
– Frequency Characteristics 0 dB (TYP.), 0 ±3 dB
– Change in Modulation Factor to APL 1% ( TYP.),
5% (MAX.)
• RF Output (Audio Sys tem). Measured by standard
demodulator input 1 kHz, 1.24 Vp-p sincurve.
– Modulation Factor ±22.5 kHz (TYP.),
±22.5 kHz - ±5.5 kHz
– Distortion Rate 0.3% (TYP.), 1% (MAX.)
– S/N Ratio 56 dB (TYP.), 48 dB (MIN.)
– Frequency Characteristics 0 dB (TYP.), 0 ±3 dB
• RF Output (Output System). Measured sync level at
whilte 100% signal, input 1 Vp-p.
– Video Carrier Center Frequency Accuracy
±10 kHz (TYP.), ±100 kHz (MAX.)
– Sound Carrier Center Frequency Accuracy
4.5 MHz (TYP.), 4.5 MHz ±7 kHz
– Video Carrier Output Level 66 dBµ (TYP.),
66 ±3 dBµ
– P/S Ratio 16 dB (TYP.), 16 ±3 dB
• RF Output Spurious.
– Specific Frequency 70 dB (TYP.), 60 dB (MIN.)
– fp to fp + 4.5 MHz
– Other Frequencies 50 dB (TYP.), 30 dB (MIN.)
– 0 to 1 GHz (except fp ±4.6 MHz)
•RF Switch
– Insertion Loss: 55 to 806 MHz
– 4.0 dB (TYP.), 8.0 dB (MAX.)
– Isolation: 61 to 72 MHz
– 70 dB (TYP.), 60 dB (MIN.)
– Return Loss: 61 to 72 MHz
– 8.0 dB (TYP.), 4.0 dB (MIN.)
• RF Switch Operation (dBµ)
– Terminal Number 4: RF OUT ← RF IN (TYP.)
–+5 V:OFF
– Open: ON
• Antenna Terminal Voltage
– Modulator OSC Leakage 9.5 dBµ (MAX.)
– Tuner OSC Leakage
– Fundamental Wave 60 dBµ (MAX.)
– Higher Harmonic 60 dBµ (MAX.)
• Noise Figure (UHF AIR)
– Maximum 11 dB (TYP.), 16 dB (MAX.)
–
– Shall satisfy the requirements stated in FCC
NF Sampling Plan C (effective January, 1980)
– Noise figure measur ement shall be based on
FCC OST 50 (effective January, 1980)
– XIRS 11 dB (TYP.), 16 dB (MAX.)
–
– Noise figure measur ement shall be based on
FCC OST 50 (effective January, 1980)
*A representative tuner test shall be conducted on the follow-
NOTE:
ing channels and on the worst channel found CH 14 through CH69:
Ch14, 20, 26, 32, 38, 44, 50, 56, 62, and 69.
RF Data Sheet 3
VT4T5UF2021 Combination Tuner/Demodulator/Modulator
60
50
40
30
20
88 216
43.5 dBµ
46 dBµ
54 dBµ
960 5000
COMB3-4
RADIATION (dBµ)
FREQUENCY (MHz)
• Image Rejection
– At -47 dBM Input
– VHF Air: 65 dB (TYP.), 60 dB (MIN.)
– VHF CATV: 60 dB (TYP.), 50 dB (MIN.)
– UHF: 55 dB (TYP.), 45 dB (MIN.)
– At -17 dBM: Input
– VHF Air: 60 dB (TYP.), 50 dB (MIN.)
– VHF CATV: 50 dB (TYP.), 40 dB (MIN.)
– UHF: 50 dB (TYP.), 35 dB (MIN.)
• IF Rejection
– At -47 dBM: Input
– VHF Low: 60 dB (TYP.), 50 dB (MIN.)
– VHF High: 100 dB (TYP.), 60 dB (MIN.)
– UHF 100: dB (TYP.), 60 dB (MIN.)
– At -17 dBM Input
– VHF Low: 60 dB (TYP.), 45 dB (MIN.)
– VHF High: 70 dB (TYP.), 50 dB (MIN.)
– UHF: 70 dB (TYP.), 40 dB (MIN.)
•CB Rejection
– SI: 50 dB (TYP.), 40 dB (MIN.)
– Undesirable: 0.535 MHz to 30 MHz
– -7 Input (MIN.)
– Desirable: 55.25 MHz to 83.25 MHz (CH 2 to Ch 6)
– -66 Input (MIN.)
• Specific Channel Rejection
– Desirable 54 dBµ in put; Un desireab le 49 dbµ inpu t
– CH A-3 ← CH A-5: 60 dB (TYP.); 55 dB (MIN.)
– CH 6 ← CH A-5: 55 dB (TYP.); 50 dB (MIN.)
– CH A-5 ← CH A-5: 60 dB (TYP.); 50 dB (MIN.)
– CHP 5 ← CHS 6: 55 dB (TYP.); 52 dB (MIN.)
– CHP 5 ← CHP 6: 60 dB (TYP.); 45 dB (MIN.)
• Band Edge Tuning Margin
– CH 2: -4.0 MHz (TYP.), -3.25 MHz (MIN.)
– CH B: 3.0 MHz (TYP.), 2.0 MHZ (MIN.)
– CH C: -4.0 MHz (TYP.), -3.25 MHz (MIN.)
– CH W + 11: 3.0 MHz (TYP.), 2.0 MHz (MIN.)
– CH W + 12: -5.0 MHz (TYP.), -3.25 MHz (MIN.)
– CH 69: 5.0 MHz (TYP.), 2.0 MHz (MIN.)
• PLL AC Characteristics
– Setting Up Enable: Tsuen 1 µs (MIN.)
– Holding Enable: Thden 1 µs (MIN.)
– Setting Up Data: Tsuda 1 µs (MIN.)
– Holding Data: Thdda 1 µs (MIN.)
– Clock Level High: Thicl 1 µs (MIN.)
– Clock Level Low: Tlocl 1 µs (MIN.)
– Clock Rate: Trate 10 µs (MIN.)
– Signal Rising: Trise 1 µs (MIN.)
– Signal Falling: Tfall 1 µs (MIN.)
• Picture Output.
– Output Level (CH 10) 1 Vp-p (TYP.), 1 ±2 Vp-p
–At 1 kΩ termination, fp 70 dBµ, white 100%
– Differential Gain (CH 10) 5° (TYP.), 10° (MAX.)
– fp 90 dBµ, Sterstep 80 IRE
– Differential Phase (CH 10) 1° (TYP.), 10° (MAX.)
– fp 90 dBµ, Sterstep 80 IRE
– S/N ratio 47 dB (TYP.), 43 dB (MIN.)
– fp 70 dBµ, White 100%, 100 kHz to 4.2 MHz fil-
ter, Sctrap On
– Frequency Characteristics (CH 10), fp 70 dBµ,
multi-burst
– 1.0 MHz: 0 dB (TYP.), -3 to +3 dB
– 2.0 MHz: 0 dB (TYP.), -3 to +3 dB
– 3.0 MHz: -1.0 dB (TYP.), -4.5 dB to +2.5 dB
– 3.58 MHz: -1.0 dB (TYP.), 0 dB to 6 dB
– Synchronized Ratio (CH 10) 28.5% (TYP.),
23.6% to 33.6%
– fp 70 dBµ, SMPTE color bar
• Sound Output (CH 10)
– Output Level 480 mVrms (TYP.), 360 mVrms to
580 mVrms
– fp 70 dBµ, SMPTE color bar 87.5% modula-
tion, P/S 6 dB, fs 1 k Hz, si n-c ur ve 60 % mo du-
lation, 75 µs pre-emphasis
– Distortion Rate 0.5% (TYP.), 3.0% (MAX.)
– S/N Ratio 52 dB (TYP.), 42 dB (MAX.)
– Frequency Characteristics 0 dB (TYP.), 0 ±3 dB
– AM Removal Level 45 dB (TYP.), 35 dB (MAX.)
• AFT Output
– Output Voltage 2.5 V (TYP.), 1.75 V to 3.25 V
– Frequency Accuracy 25 kHz (TYP.), 100 kHz (MAX.)
Figure 2. Radiation (3m Method)
4 RF Data Sheet
Combination Tuner/Demodulator/Modulator VT4T5UF2021
105
95
85
75
DESIRED INPUT LEVEL (dBµ)
65
50
60 70 1009080
UNDESIRED INPUT LEVEL (dBµ)
110
NOTE: Input levels causing 1% cross modulation are shown in shaded area.
Figure 3. Cross Modulation Between Next and Adjacent Channels
105
95
85
75
DESIRED INPUT LEVEL (dBµ)
65
50
60 70 1009080
UNDESIRED INPUT LEVEL (dBµ)
NOTE: Input levels causing 1% cross modulation are shown in shaded area.
Figure 4. Cross Modulation Between Adjacent Channels
t
RISEtSUEN
t
FALL
COMB3-2
110
COMB3-3
t
HDEN
90%
10%
90%
10%
90%
10%
COMB3-5
ENABLE
DATA
CLOCK
t
SUDAtHDDA
t
HIEL
t
RATE
t
LOEL
Figure 5. PLL AC C haracteristics
RF Data Sheet 5
VT4T5UF2021 Combination Tuner/Demodulator/Modulator
OUTLINE DIMENSIONS
6 RF Data Sheet
Combination Tuner/Demodulator/Modulator VT4T5UF2021
RF Data Sheet 7
VT4T5UF2021 Combination Tuner/Demodulator/Modulator
LIFE SUPPORT POLICY
SHARP components should not be used in medical devices with life support functions or in safety equipment (or similiar applications where
component failure would result in loss of life or physical harm) without the written approval of an officer of the SHARP Corporation.
LIMITED WARRANTY
SHARP warrants to its Customer that the Products will be free from defects in material and workmanship under normal use and service for a
period of one year from the date of invoice. Customer's exclusive remedy for breach of this warranty is that SHARP will either (i) repair or
replace, at its option, any Product which fails during the warranty period because of such defect (if Customer promptly reported the failure to
SHARP in writing) or, (ii) if SHARP is unable to repair or replace, refund the purchase price of the Product upon its return to SHARP. This
warranty does not apply to any Product which has been subjected to misuse, abnormal service or handling, or which has been altered or
modified in design or construction, or which has been serviced or repaired by anyone other than Sharp. The warranties set forth herein are in
lieu of, and exclusive of, all other warranties, express or implied. ALL EXPRESS AND IMPLIED WARRANTIES, INCLUDING THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR USE AND FITNESS FOR A PARTICULAR PURPOSE, ARE SPECIFICALLY
EXCLUDED. In no event will Sharp be liable, or in any way responsible, for any incidental or consequential economic or property damage.
The above warranty is also extended to Customers of Sharp authorized distributors with the following exception: reports of failures of Products
during the warranty period and return of Products that were purchased from an authorized distributor must be made through the distributor.
In case Sharp is unable to repair or replace such Products, refunds will be issued to the distributor in the amount of distributor cost.
SHARP reserves the right to make changes in specifications at any time and without notice. SHARP does not assume any responsibility
for the use of any circuitry described; no circuit patent licenses are implied.
NORTH AMERICA
SHARP Microelectronics
of the Americas
5700 NW Pacific Rim Blvd., M/S 20
Camas, WA 98607, U.S.A.
Phone: (360) 834-2500
Telex: 49608472 (SHARPCAM)
Facsimile: (360) 834-8903
EUROPE
SHARP Electronics (Europe) GmbH
Microelectronics Division
Sonninstraße 3
20097 Hamburg, Germany
Phone: (49) 40 2376-2286
Facsimile: (49) 40 2376-2232
http://www.sharpmed.com
ASIA
SHARP Corporation
Integrated Circuits Group
2613-1 Ichinomoto-Cho
Tenri-City, Nara, 632, Japan
Phone: (07436) 5-1321
Telex: LABOMETA-B J63428
Facsimile: (07436) 5-1532
http://www.sharpsma.com
©1999 by SHARP Corporation Reference Code SMA99024
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