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CXA3025N
All Band TV Tuner IC (VHF-CATV-UHF) For the availability of this product, please contact the sales office.
Description The CXA3025N is a single chip TV tuner IC which performs as a mixer, oscillator for UHF and VHFCATV bands. An IF amplifier is also provided. This IC adopts a 24-pin SSOP package (0.8mm pitch) in response to the trend towards miniaturizing the tuner and automatic IC mounting. Features * Low noise figure * Superior cross modulation * Low spurious * Stable oscillating characteristics * Local oscillator output for PLL * Double tune filter connectable to MIX output * Low thermal resistance package Structure Bipolar silicon monolithic IC Applications * TV tuner * CATV tuner * VCR tuner Block Diagram and Pin Configuration (Top View)
BANDSW UOSCB2 UOSCE2 UOSCE1 PLLOUT UOSCB1 VOSCC GND NC VOSCB IFOUT GND
24 pin SSOP (Plastic)
Absolute Maximum Ratings (Ta = 25C) 10.5 V * Supply voltage VCC * Storage temperature Tstg -65 to +150 C * Allowable power dissipation PD 1200 mW (when mounted on a board) Operating Conditions * Supply voltage * Operating temperature
VCC Topr
9.0 0.9 -20 to +75
V C
24
23
22
21
20
19
18
17
16
15
14
13
OSC BUFF BAND SW
UHF OSC
VHF OSC
IF AMP
REG
VHF MIX
UHF MIX
1
2
3
4
5
6
7
8
9
10
11
12
IFIN2
GND
MIXOUT2
MIXOUT1
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-
VHFIN1
UHFIN1
VHFIN2
UHFIN2
IFIN1
GND
VCC
NC
E95Y06-ST
CXA3025N
Pin Description and Equivalent Circuit Pin No. Symbol Pin voltage typ. (V) During VHF reception -- IFIN1 During UHF reception -- -- 2 IFIN2 -- 3 VCC 9.0 7.4 4 MIXOUT1 7.2 7.4 5 MIXOUT2 7.2 3.2 8 VHFIN1 3.4 3.2 9 VHFIN2 3.4 10 NC 3.4 11 UHFIN1 3.2 3.4 12 UHFIN2 3.2 3.3 13 VOSCB 3.5
13 3k 3k 15 3 VCC 1k 11 6k 12 6k 3 450 4 450 5 VCC 1 8k 8k 2
Equivalent circuit
Description
1
IF amplifier inputs.
Power supply.
Mixer outputs.
8 6k 6k
9
VHF inputs. Normally a capacitor is connected at Pin 8 to GND and Pin 9 is used for input.
No connected.
UHF inputs. Balanced input to Pins 11 and 12 or a capacitor is connected at Pin 11 to GND and Pin 12 is used for input.
VHF oscillators.
6.3 15 VOSCC 9.0 14 NC -2- No connected.
CXA3025N
Pin No. 16
Symbol UOSCB1
Pin voltage typ. (V) 3.5 3.3 3.0 2.5 3.0 2.5
Equivalent circuit
Description
21
20
17
16
17
UOSCE1
UHF oscillators.
20
UOSCE2
21
UOSCB2
3.5 3.3 0 GNDs.
6, 7 GND 18 19
5.8
3
VCC
22
PLLOUT
30 22 3.2k
PLL IC oscillator output.
5.7
0
3
VCC 900
23
BANDSW
23
1.6k 20k
Band switching. UHF operation when 3V or more voltage is applied externally, and VHF operation when OPEN or 0.5V or less voltage is applied.
3.0
VCC
Under VHF operation : 4.5 24 IFOUT Under UHF operation : 4.5
3
47 24
IF output.
-3-
CXA3025N
Electrical Characteristics Item Circuit current Symbol IccV IccU CG1 Conversion gain1 CG2 CG3 CG4 NF1 Noise figure1 2 NF2 NF3 NF4 CM1 1% cross modulation 1 3 CM2 CM3 CM4 Max. output power
See Electrical Characteristics Measurement Circuit. (Ta = 25C, VCC = 9V) Measurement conditions VHF operation; no signal UHF operation; no signal VHF operation; fRF = 55MHz; Input level -40dBm VHF operation; fRF = 360MHz; Input level -40dBm UHF operation; fRF = 360MHz; Input level -40dBm UHF operation; fRF = 800MHz; Input level -40dBm VHF operation; fRF = 55MHz VHF operation; fRF = 360MHz UHF operation; fRF = 360MHz UHF operation; fRF = 800MHz VHF operation; fD = 55MHz; fUD = 12MHz VHF operation; fD = 360MHz; fUD = 12MHz UHF operation; fD = 360MHz; fUD = 12MHz UHF operation; fD = 800MHz; fUD = 12MHz 99 97 91 89 +8 Min. 38 37 17 18 23 23 Typ. 53 51 20 21 26 26 13 12 9 9 102 100 94 92 +10 Max. 63 62 23 24 29 29 16 15 13 13 Unit mA mA dB dB dB dB dB dB dB dB dB dB dB dB dBm 200 kHz 300 kHz 300 kHz 300 kHz 100 kHz 200 kHz 150 kHz 150 kHz -20 -20 0 3 -10 -10 0.5 10.5 dBm dBm V V
Pomax 50 load (sat) fsw1 VHF operation; fOSC = 100MHz VHF operation; fOSC = 405MHz UHF operation; fOSC = 405MHz UHF operation; fOSC = 845MHz VHF operation; fOSC = 100MHz VHF operation; fOSC = 405MHz UHF operation; fOSC = 405MHz UHF operation; fOSC = 845MHz fsw2 fsw3 fsw4 fst1 fst2 fst3 fst4
Switch ON drift4
+B drift5
PLL OUT output power Band switch voltage
PoscV VHF operation; 50 load PoscU UHF operation; 50 load VswV VswU VHF operation UHF operation
1 Measured value for untuned inputs. 2 Noise figure is the directly-read value of the NF meter in DSB. 3 Desired signal (fD) input level is -33dBm. Undesired signal (fUD) is 100kHz, 30% AM at 12MHz. The measurement value is the undesired signal level, measured with a spectrum analyzer at S/I = 46dB. 4 Frequency variation from 3 seconds to 3 minutes after switch ON. 5 Frequency variation when VCC = 9V 5% variation.
-4-
CXA3025N
Electrical Characteristics Measurement Circuit
100 +9V PLL OUT VC 15 1n 0.5 3.2 5.5t
1n +9V 3.3k 51 51 1n 47k 0.5p (UK) 47k VL VH VL/VH SW
BAND SW ON: UHF OFF: VHF IF OUT 10k 47k
47k
1T363 0.5 2.6 1.5t
47k 0.5 3.2 2.5t
1n
0.5p (UK) 14p
1n 1n 3.3k 1n 24 23 22 21
56p 4p
56p 4p
1T363 1T362 16p 1p (UK)
68p (RH) 47k 22
2p
20
19
18
17
16
15
14
13
UHFOSCE2
UHFOSCE1
BANDSW
UHFOSCB2
VHFOSCC
IFOUT
GND
NC
CXA3025N
MIXOUT1
MIXOUT2
UHFOSCB1
VHFIN1
UHFIN1
VCC
GND
VHFIN2
1
2
3
4
5
6
7
8
9
10
11
12
1n L1 51p 51p
1n
1n
UHFIN2
1n
IFIN1
IFIN2
GND
4.7 +9V
1n
VHF IN
NC
UHF IN
Inductance constant L without indication is an air-core coil of 0.5mm diameter.
-5-
VHFOSCB
PLLOUT
GND
CXA3025N
Application Circuit
100 +9V PLL OUT VC 15 1n 47k 0.5 3.8 1.5t BAND SW ON: UHF OFF: VHF IF OUT 10k 1T363 0.5p (UK) 47k 47k 0.5 3.2 2.5t 1n 1n 3.3k 1n 24 23 22 21 20 19 18 17 16 15 4p 2p 4p 1T362 1p (UK) 14 13 16p 22 47k 15p 7p 15p 0.5p (UK) 47k 1n 1T363 1n 47k 0.5p (UK) 47k 0.5 3.2 5.5t 3.3k 51 51 VH VL 1n +9V
1T363
68p (RH)
UHFOSCE2
UHFOSCE1
BANDSW
UHFOSCB2
VHFOSCC
IFOUT
GND
NC
CXA3025N
MIXOUT1
MIXOUT2
UHFOSCB1
VHFIN1
UHFIN1
VCC
GND
VHFIN2
1
2
3
4
5
6
7
8
9
10
11
12
4.7k 1n 27P 150P 1n 1n 1n
12.5t 4
3.5t 4
VHF IN
UHF IN
4.7 +9V
1n
Inductance constant L without indication is an air-core coil of 0.5mm diameter.
Circuit when using two varicap diodes for the UHF oscillator, improving the oscillator stability and frequency variable range, and using a double tune circuit for the IF tune circuit. Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
-6-
UHFIN2
IFIN1
IFIN2
GND
NC
VHFOSCB
PLLOUT
GND
CXA3025N
Description of Operation (See Electrical Characteristics Measurement Circuit.) VHF oscillator circuit This is a differential amplifier type oscillator circuit with an output at Pin 15 and an input at Pin 13. Connect an LC resonance circuit comprising a varicap diode to Pin 15 through a coupling capacitor, and input the positive feedback from this resonance circuit to Pin 13 through a feedback capacitor to execute oscillation. Note that if the capacitance across Pins 13 and 15 is too large, positive feedback may be applied via a parasitic capacitance causing undesired stray oscillation. The resistance connected to Pin 13 is for preventing parasitic oscillation, and is inserted to ensure stable oscillation. VHF mixer circuit The mixer circuit adopts a common emitter type double-balanced mixer with little leakage of the local oscillation signal. The RF signal is input to Pins 8 and 9. During normal use, the RF signal is input to one pin while the other pin is connected to GND. The RF signal is converted to IF frequency by the signal supplied from the oscillator and then output to Pins 4 and 5. UHF oscillator circuit The UHF oscillator is formed from two collector-grounded Colpitts oscillators, and oscillation is provided at the differential input through an LC resonance circuit comprising a varicap diode. An LC resonance circuit comprising a varicap diode is connected across Pins 16, 17, 20 and 21. UHF mixer circuit Like the VHF mixer, the UHF mixer adopts a double-balanced mixer. The RF signal is input to Pins 11 and 12. There is a balanced input at the differential from both edges of the secondary coil of the pre-stage double tune circuit, or an unbalanced input to Pin 11 with a capacitor connected at Pin 12 to GND. Otherwise, the conditions and usage are the same as those for the VHF mixer circuit. IF amplifier circuit The signal frequency converted by the mixer is output from Pins 4 and 5, and input to IF input pins 1 and 2 through an external IF tune circuit. For the IF tune circuit, a single tune circuit like the electrical characteristics measurement circuit or a double tune circuit can be connected. The signal amplified by the IF amplifier is output from Pin 24. The output impedance is approximately 75. Also, the input block of the IF amplifier has a built-in coupling capacitor, and direct connection with the mixer output is possible. U/V switch circuit UHF operation is chosen by applying voltage of 3V or more to Pin 23; VHF operation for 0V or OPEN. PLL oscillator signal output circuit The oscillation signal is output to Pin 22 (PLLOUT) through a buffer amplifier. The resistance connected to the output pin is used to adjust the current flowing to the buffer amplifier. The resistance value is adjusted depending on the connected load, and output distortion can be minimized.
Notes on Operation Care should be taken for grounding, etc. when placing external parts as high operating frequencies are present. In addition, since the GND pins (Pins 6, 7, 18 and 19) also serve as heat dissipation pins, care should be taken to prevent heat problems. Care should also be taken to prevent electrostatic damage to high frequency I/O pins. -7-
CXA3025N
Example of Representative Characteristics
Conversion gain vs. Reception frequency (Untuned input)
40
Next adjacent cross modulation vs. Reception frequency (Untuned input)
120 VHF (Low) 100 VHF (High) UHF fIF = 45MHz, 100kHz 30%AM 80 fUD = fD +12MHz fUD = fD -12MHz
30 UHF
CG - Conversion gain [dB]
CM - Cross modulation [dB]
60
VHF (Low) 20
VHF (High)
40
20
10
0 0 100 200 300 400 500 600 700 800 900 Receiving frequency [MHz]
0
0
100 200 300 400 500 600 700 800 900 Receiving frequency [MHz]
I/O characteristics (Untuned input)
20 20
Noise figure vs. Reception frequency (Untuned input, in DSB)
fIF = 45MHz
0
15
NF - Noise figure [dB]
IF output level [dBm]
VHF (High) VHF (Low) 10 UHF
-20
fRF = 100MHz (VHF) fRF = 450MHz (UHF) fIF is 45MHz in both cases
-40
5
-60 -60
0 -50 -40 -30 -20 -10 0 10 0 100 200 300 400 500 600 700 800 900 Receiving frequency [MHz]
RF input level [dBm]
-8-
CXA3025N
Circuit current vs. Supply voltage
60 VHF
Circuit current [mA]
UHF
50
40
8
9 Supply voltage [V]
10
+B drift vs. Oscillation frequency
300 200 100 VCC + 5% VCC - 5% (VCC = 9V)
Drift [kHz]
0 -100 -200 -300 0 100 200 300 400 500 600 700 800 900
Oscillation frequency [MHz]
PLLOUT level (fundamental harmonic and secondary higher harmonic) vs. Oscillation frequency
0
-10
PLLOUT level [dBm]
-20
-30
-40
-50 Fundamental harmonic output level Secondary higher harmonic output level -60 0 100 200 300 400 500 600 700 800 900
Oscillation frequency [MHz]
-9-
CXA3025N
VHF Input Impedance
j50
j25
j100
IC
VHFIN1
50
50MHz 100MHz 200MHz 300MHz 400MHz 1000pF
8
9
NC
0
VHFIN2
UHFIN1
11
10
12
S11
-j25
-j100
-j50
UHF Input Impedance
j50
j25
j100
IC
UHFIN1
50
NC
0
10 200MHz S11 400MHz 600MHz -j25 800MHz -j100
11
12 1000pF
-j50
- 10 -
UHFIN2
UHFIN2
CXA3025N
IF OUT Impedance
j50
j25
j100
0
50
60MHz 45MHz 30MHz
-j25
-j100
-j50
PLL OUT Impedance
j50
j25
j100
0
50
135MHz 850MHz 470MHz
-j25
-j100
-j50
- 11 -
CXA3025N
Package Outline
Unit: mm
24PIN SSOP (PLASTIC)
+ 0.2 1.25 - 0.1 9.7 0.1 0.1 13
24
5.6 0.1
A
1 + 0.08 0.32 - 0.07
12 0.8
0.13 M
0.1 0.1 0.25 (0.3)
+ 0.05 0.32 - 0.04
B
7.6 0.2
DETAIL B
EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER ALLOY 0.1g
0 to 10 DETAIL A NOTE: Dimension "" does not include mold protrusion.
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SSOP-24P-L03 SSOP024-P-0056 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT
- 12 -
0.6 0.15
+ 0.02 0.17 - 0.01
(0.5)
(0.15)

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