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PDF CXA3252N Data sheet ( Hoja de datos )
| Número de pieza | CXA3252N | |
| Descripción | All Band TV Tuner IC with On-chip PLL | |
| Fabricantes | Sony Corporation | |
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CXA3252N
All Band TV Tuner IC with On-chip PLL
Description
The CXA3252N is a monolithic TV tuner IC which
integrates local oscillator and mixer circuits for VHF
band, local oscillator and mixer circuits for UHF band,
an IF amplifier and a tuning PLL onto a single chip,
enabling further miniaturization of the tuner.
32 pin SSOP (Plastic)
Features
• Superior cross modulation
• Supports both IF double-tuned filter and adjacent
channel trap.
• Balanced UHF oscillator (4 pins) with excellent oscil-
lation stability
• Supports both I2C and 3-wire bus modes
• Automatic identification of 18, 19 or 27-bit control
(during 3-wire bus mode)
• On-chip high voltage drive transistor for charge pump
• Reference frequency selectable from 31.25, 50 or
62.5 kHz (when using a 4 MHz crystal)
• Low-phase noise synthesizer
• On-chip 4-output band switch
(supports output voltages from 5 to 9 V)
• 32 pin SSOP
Absolute Maximum Ratings (Ta=25 °C)
• Supply voltage
VCC1, VCC2 −0.3 to + 5.5
VCC3 −0.3 to +10.0
• Storage temperature Tstg −55 to + 150
• Allowable power dissipation
V
V
°C
Operating Conditions
• Supply voltage
VCC1, VCC2 4.75 to 5.30 V
VCC3 4.75 to 9.45 V
• Operating temperature Topr −25 to +75 °C
PD 580 mW
(when mounted on a printed circuit board)
Applications
• TV tuners
• VCR tuners
• CATV tuners
Structure
Bipolar silicon monolithic IC
This IC has the pins whose electrostatic discharge strength is weak as the operating frequency is high and the high-frequency
process is used for this IC.
Take care of handling the IC.
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–
E00301-TE
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CXA3252N
Pin Pin Voltage
No. Symbol
[V]
10 MIXOUT1
—
11 MIXOUT2
—
Equivalent circuit
10 11
Description
Mixer output.
These pins output the signal with
open collector, and they must be
connected to the power supply via
the load.
12 GND1
—
3.8 during
VHF reception 9
13 BYP/MS
3.8 during
UHF reception 14
3k
2.6 during
VHF reception
14 VHFin
0.1 during
UHF reception
2.6 during
UHF reception
9
15 UHFin1
0.1 during
15
VHF reception 16
2.6 during
UHF reception
16 UHFin2
0.1 during
VHF reception
2.1 during
VHF reception 9
17 VOSC1
2.3 during
400
UHF reception
4.2 during
VHF reception
19 VOSC2
3k
5.0 during
UHF reception
18 GND
—
—
24
15p 24k
3k
76k
13
3k 3k
Analog circuit GND.
Pin 12 : VHF input grounding and
control bus switching.
Pin 13 : VHF input.
Input format is the unbal-
anced input.
UHF inputs.
Input the signal to Pins 14 and 15
symmetrically or ground either of
Pin 14 or 15 with the capacitor and
input the signal to the rest.
19
50
17 External resonance circuit connec-
3k tion for VHF oscillator.
GND for separating the analog and
— PLL systems.
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Electrical Characteristics Measurement Circuit (I2C bus control)
CXA3252N
+30V
22k
8200p
6.8k 0.047µ
100p
+5V
3.3µ 1n
33p
47k
2.6φ
2.5t
47k
1.2k
3.2φ 1n 47k
5.5t
51
3.2φ 1n 47k
51
2.5t
0.75p
IFOUT
1T363
0.5p 0.5p
7p
1T363
150p 47k 1T363
XTAL
4MHz
100p
47k
47k 56p
56p
1p 1n
1T362
1n
6p 2p 6p
20 16p 47k
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
CXA3252N
1 2 3 45
200 200 200 240 240
6 7 8 9 10 11 12 13 14 15 16
12p
12p
240 240
2k
4.5t 4.5t
1n 1n 1n
ADSW SCL SDA
2.2µ
56p 56p
100 1n
+5V
VHF IN
UHF IN
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Unmarked Ls are air coils with a wire diameter of 0.5 mm.
–11–
11 Page | ||
| Páginas | Total 32 Páginas | |
| PDF Descargar | [ Datasheet CXA3252N.PDF ] | |
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