Sony CXA1695 All band tv tuner ic (vhf-catv-uhf) Datasheet

CXA1695L
All Band TV Tuner IC (VHF-CATV-UHF)
Description
The CXA1695L is a single chip TV tuner IC which
performs as an oscillator, mixer for VHF/CATV and
UHF bands. An IF amplifier is also provided.
This IC achieves a large reduction of external parts
in addition to miniaturizing the tuner and increasing
manufacturing productivity, reliability and design
efficiency.
This IC is pin-compatible with the CXA1594L with
improvement in noise figure and oscillation stability.
16 pin SZIP (Plastic)
Structure
Bipolar silicon monolithic IC
Features
• On-chip oscillator and mixer for UHF band
• Low noise figure
• Reduced spurious interference
• Superior cross modulation
• Stable oscillation characteristics
• Ultra small package ensures tuner miniaturization
Absolute Maximum Ratings (Ta=25 °C)
• Supply voltage
Vcc
11
V
• Storage temperature
Tstg –55 to +150
°C
• Allowable power dissipation
PD
930
mW
(when mounted on board)
Applications
Operating Conditions
• CTV tuner
• CATV UP-DOWN converter
• Supply voltage
Vcc
• Operating temperature Topr
8.1 to 9.9
–20 to +75
V
°C
Block Diagram and Pin Configuration
UHF MIX
VHF MIX
–
IF AMP
+
VHF OSC
V
REG
2
3
4
5
6
7
8
9
10
11
12
13
14
15
MIX OUT 1
VHF IN 2
MIX OUT 2
GND
SW
Vcc
V OSC B
UHF IN 1
V OSC C
UHF IN 2
GND
U OSC C
U OSC B2
16
U OSC B1
1
VHF IN 1
UHF OSC
IF OUT
SW
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
—1—
E92Y29A51-TE
CXA1695L
Pin Description and Equivalent Circuit
Pin
No.
1
Symbol
IF OUT
Typical pin
voltage (V)
Under VHF
operation
4.4
Equivalent circuit
Vcc
Description
IF output.
8
55
Under UHF
operation
4.4
2
VHF IN 1
1
3.2
3.3
4
2
3k
3k
4
VHF IN 2
3.2
VHF input.
Normally a decoupling
capacitor is connected at pin 2
to GND and pin 4 is used for
input.
3.3
3
MIX OUT 1
7.5
8
Mixer output and IF amplifier
input.
Vcc
7.2
450
450
5k
3
5
MIX OUT 2
7.5
5
5k
7.2
6
GND
0
7
SW
3V or more
GND
UHF/VHF switch pin.
Connect 9V source through
about a 10kΩ resister for VHF
reception; 0V or leave open for
UHF.
Vcc
8
0.4V or less
40k
7
60k
—2—
CXA1695L
Pin
No.
Symbol
Typical pin
voltage (V)
8
Vcc
9.0
Power supply
9
V OSC B
3.5
VHF oscillator.
Equivalent circuit
Description
Vcc
8
3.7
800
11
9
11 V OSC C
6.7
3k
3k
25p
9.0
10 UHF IN 1
3.3
3.1
12
10
3k
3k
12 UHF IN 2
UHF input.
The balanced input to Pins 10
and 12, or a decoupling
capacitor is connected at Pin
12 to GND and Pin 10 is used
for input.
3.3
3.1
13
GND
14 U OSC C
0
GND
9.0
UHF oscillator.
Vcc
6.5
8
800
15 U OSC B2
3.6
3.4
16 U OSC B1
14
15
16
3k
3k
3.6
3.4
—3—
CXA1695L
Electrical Characteristics
Item
Circuit current
Conversion gain
∗1
Noise figure
∗1∗2
1% cross
modulation
∗1∗3
Symbol
Measurement conditions
IccV
IccU
CG1
CG2
CG3
CG4
NF1
NF2
NF3
NF4
CM1
VHF operation, no signal
UHF operation, no signal
VHF operation, fRF=55 MHz, input level –40 dBm
VHF operation, fRF=360 MHz, input level –40 dBm
UHF operation, fRF=360 MHz, input level –40 dBm
UHF operation, fRF=800 MHz, input level –40 dBm
VHF operation, fRF=55 MHz
VHF operation, fRF=360 MHz
UHF operation, fRF=360 MHz
UHF operation, fRF=800 MHz
VHF operation, fD=55 MHz
fUD=±12 MHz
VHF operation, fD=360 MHz
fUD=±12 MHz
UHF operation, fD=360 MHz
fUD=±12 MHz
CM2
CM3
CM4
Max. output
power
Pomax
(sat)
∆fsw1
Switch ON drift
∆fsw2
∆fsw2
∆fsw4
∆fst1
+B supply
voltage drift
See Electrical Characteristics Test Circuit (Ta=25°C, VCC=9V)
∆fst2
∆fst3
∆fst4
UHF operation, fD=800 MHz
fUD=±12 MHz
50Ωload
Min.
Typ.
Max.
Unit
58.0
58.0
23.5
24.0
29.0
30.0
12.5
13.0
10.0
11.0
95.0
45.0
45.0
20.5
21.0
26.0
27.0
9.5
10.0
6.0
7.0
99.0
mA
mA
dB
dB
dB
dB
dB
dB
dB
dB
dBµ
93.0
97.0
dBµ
86.0
90.0
dBµ
86.0
90.0
dBµ
+8.0 +12.0
dBm
17.5
18.0
23.0
24.0
VHF operation, fosc=100 MHz
Frequency drift from 3 s to 3 min. after switch ON
VHF operation, fosc=405 MHz
Frequency drift from 3 s to 3 min. after switch ON
UHF operation, fosc=405 MHz
Frequency drift from 3 s to 3 min. after switch ON
UHF operation, fosc=845 MHz
Frequency drift from 3 s to 3 min. after switch ON
VHF operation, fosc=100 MHz
Frequency shift when VCC +9 V changes ±5 %
VHF operation, fosc=405 MHz
Frequency shift when VCC +9 V changes ±5 %
UHF operation, fosc=405 MHz
Frequency shift when VCC +9 V changes ±5 %
±300
kHz
±400
kHz
±600
kHz
±700
kHz
±200
kHz
±300
kHz
±400
kHz
UHF operation, fosc=845 MHz
Frequency shift when Vcc +9 V changes ±5 %
±400
kHz
∗1) Measured value for untuned inputs. Unbalanced input for VHF; balanced input for UHF.
∗2) Noise figure is uncorrected for image.
∗3) Desired signal (f D) input level is –34 dBm. Undesired signal (f UD) is 100 kHz at 40 %AM. The
measurement value is undesired signal level, it measured with spectrum analyzer at S/I=46 dB.
—4—
1.2µH
10p
+9V
10T
3.6k
VHF IN 2
4
ON : VHF
OFF: UHF
1n
Vc
SW
1
MIX OUT 2
5
68p
Wire diameter Coil diameter Number of windings
L1
0.5
3.2
1.5T
L2
0.5
3.4
2.5T
L3
0.5
3.2
5.5T
IFout
3
IF OUT
UHF in
10
2T
CXA1695L
8
6
1n
7
10k
1n
1
VHF IN 1
MIX OUT 1
GND
SW
1n
51k
9
V OSC B
2
68p
Vcc
2.2µ
10
1T362
1n
11
V OSC C
1T363
10
0.5p(UK)
100p
13
14
12
15
16
51
51
VL
VH
27p
27p
SW2
20
51k
51k
VHF in
3k
16p
51k
2T
UHF IN 2
51k
UHF IN 1
L2
L3
1p(UK)
1n
1n
GND
U OSC C
1n
U OSC B2
68p(RH)
51k
—5—
1n
U OSC B1
1T363
0.5p(SL)
0.5p(SL)
1T363
8p(UJ)
2.2µ
+9V
1n
L1
Electrical Characteristics Test Circuit
+9V
51k
Vc
CXA1695L
2.2µ
CXA1695L
Description of Operation (See Electrical Characteristics Test Circuit)
(1) VHF oscillator circuit
The differential oscillator circuit with Pin 11 output and Pin 9 input.
Connect an LC resonance circuit comprising a varicap diode to Pin 11 through a coupling capacitor. The
positive feedback from the resonance circuit is applied to Pin 9 through a feedback capacitor to execute
oscillation. Note that if a parasitic capacitance across Pins 9 and 11 is too large, it may cause undesired
oscillation.
(2) VHF mixer circuit
This is a double-balanced mixer having small leakage of local oscillation signal. The RF signal input
terminal are Pins 2 and 4. In normal use, the signal is input to one pin while the other pin is connected to
GND by decoupling capacitor. The RF signal is converted to IF with the signal supplied from oscillator.
The converted RF is sent to the IF amplifier and output to Pins 3 and 5 simultaneously.
(3) UHF oscillator circuit
This is the differential oscillator same circuit as the VHF oscillator. In Electrical Characteristics Test Circuit,
oscillation is executed as a Colpitts oscillator using one side transistor of the differential amplifier.
(4) UHF mixer circuit
This is the double-balanced mixer same circuit as the VHF mixer. The RF signal input terminal are to Pins
10 and 12.These are used balanced differential input from pre-stage double tune circuit, or an unbalanced
input to Pin 10 with the capacitor connected at Pin 12 to GND. Balanced input achieves better NF rather
than unbalanced input.
Otherwise, the conditions and usage are the same as for the VHF mixer.
(5) IF amplifier circuit
The mixer output signal is amplified by the IF amplifier and output to Pin 1. The output impedance is
approximately 75Ω.
(6) UHF/VHF switching circuit
UHF / VHF modes are switched by the DC voltage at Pin 7. UHF operation is for open or 0V; VHF
operation, for 3V or more.
Normally, for internal protection UHF/VHF switch is performed by 9V or open through about 10kΩ resistor.
Notes on Usage
Care should be taken in placing external parts because high frequencies are present. Adjust accordingly
to prevent heat problems with special care for Pins 6 and 13 (GND) whose heat dissipation accumulate.
—6—
CXA1695L
Example of Representative Characteristics
Circuit current vs. Sup p ly voltage
Conversion gain vs. Recep tion frequency (Untuned inp ut)
40
fIF=45MHz
CG - Conversion gain (dB)
Icc - Circuit current (mA )
50
40
30
UHF
20
VHF
10
30
0
8
9
0
10
V cc - Sup p ly voltage (V )
Recep tion frequency (MHz)
Noise figure vs. Recep tion frequency
(Untuned inp ut, in DSB)
20
100 200 300 400 500 600 700 800 900
Next adjacent cross modulation vs. Recep tion frequency
(Untuned inp ut)
120
CM - Cross modulation (dBµ)
NF - Noise figure (dB)
fIF =45MHz
15
10
VHF
UHF
5
0
0
Recep tion frequency (MHz)
I/O characteristics (Untuned inp ut)
IF outp ut level (dBm)
10
0
fIF =45MHz
fRF =100MHz (VHF)
–30
–40
–50
–50
–40
–30
–20
–10
fUD=fD+12MHz
fUD=fD–12MHz
60
40
fIF =45MHz
Interference signals:100kHz 40% AM
20
100 200 300 400 500 600 700 800 900
Recep tion frequency (MHz)
20
–20
80
0
100 200 300 400 500 600 700 800 900
–10
100
0
+10
RF inp ut level (dBm)
—7—
CXA1695L
VHF Input Impedance
j50
j25
j100
j150
j250
j10
0
AA
AA
50MHz
50
100MHz
200MHz
–j250
–j10
400MHz
IC
–j150
VHFIN1
–j25
2
–j100
3
VHFIN2
4
1n
5
6
S11
–j50
UHF Input Impedance
j50
j25
j100
j150
j250
j10
0
AA
AA
50
–j250
–j10
400MHz
800MHz
IC
600MHz –j150
UHFIN1
8
–j25
9
UHFIN2
10
11
12
–j100
S11
–j50
—8—
1n
CXA1695L
IF Output Impedance
j50
j25
j100
j150
j250
j10
50MHz
AA
AA
60MHz
40MHz
0
50
–j250
–j10
–j150
–j25
–j100
–j50
—9—
CXA1695L
Unit : mm
16PIN SZIP (PLASTIC) 225mil
+ 0.4
14.0 – 0.1
2.2 ± 0.2
5.715 MAX
+ 0.3
4.35 – 0.1
SEATING PLANE
0.4 ± 0.1
0° to
16
1
0.25 M
3.1
Package Outline
8°
+ 0.1
0.2 – 0.05
0.889
1.778
PACKAGE STRUCTURE
PACKAGE MATERIAL
EPOXY RESIN
SONY CODE
SZIP-16P-01
LEAD TREATMENT
SOLDER PLATING
EIAJ CODE
SZIP016-P-0225-A
LEAD MATERIAL
COPPER ALLOY
PACKAGE WEIGHT
0.3g
JEDEC CODE
—10—
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