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PDF CXA3250N Data sheet ( Hoja de datos )
| Número de pieza | CXA3250N | |
| Descripción | All Band TV Tuner IC with On-chip PLL | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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CXA3250N
All Band TV Tuner IC with On-chip PLL
Description
The CXA3250N 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.
30 pin SSOP (Plastic)
Features
• Low power consumption (5 V, 69 mA typ.)
• Superior cross modulation
• Balanced UHF oscillator (4 pins) with excellent
oscillation 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 A/D converter (during I2C 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)
Absolute Maximum Ratings (Ta=25 °C)
• Supply voltage
VCC1, VCC2 –0.3 to +5.5 V
VCC3 –0.3 to +10.0 V
• Storage temperature Tstg –55 to +150 °C
• Allowable power dissipation
PD 580 mW
(when mounted on a printed circuit board)
Operating Conditions
• Supply voltage
VCC1, VCC2 4.75 to 5.30
VCC3 4.75 to 9.45
• Operating temperature Topr –25 to +75
V
V
°C
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—
E98X34-TE
1 page  
CXA3250N
Pin
Symbol
No.
Pin voltage
[V]
9 MIXOUT1
—
Equivalent circuit
9 10
10 MIXOUT2
—
Description
Mixer output.
These pins output the signal with
open collector, and they must be
connected to the power supply via
the load.
11 GND1
—
3.8 during
VHF reception 8
12 BYP/MS
3.8 during
13
UHF reception
3k
2.4 during
VHF reception
13 VHFin
2.6 during
UHF reception
2.3 during
UHF reception
14 UHFin1
2.6 during
8
14
VHF reception
15
2.3 during
UHF reception
15 UHFin2
2.6 during
VHF reception
2.1 during 8
VHF reception
16 VOSC1
2.3 during
400
UHF reception
4.2 during
3k
VHF reception
18 VOSC2
5.0 during
UHF reception
17 GND
—
—
23
15p 24k
3k
76k
12
3k 3k
Analog circuit GND.
Pin 12 : VHF input grounding and
control bus switching.
Pin 13 : VHF input.
Input format is the
unbalanced 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.
18
50
16 External resonance circuit
3k connection for VHF oscillator.
GND for separating the analog and
—
PLL systems.
—5—
5 Page 
CXA3250N
Electrical Characteristics Measurement Circuit (I2C bus control)
+30V
8200p
6.8k 0.047µ
22k
100p
+5V
2.2µ 1n
33p
47k
2.6φ
2.5t
47k
1.2k
3.2φ 1n 47k
5.5t
51 BVL
3.2φ 1n 47k
2.5t
51 BVH
0.75p
XTAL
4MHz
ADC in IF OUT
1T363
0.5p 0.5p
7p
47k
47k 56p
56p
1T363
1p
150p
1n
47k 1T363
1T362
100p
1n
6p 2p 6p
20 16p 47k
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
CXA3250N
1234567
SCL SDA ADSW
FMT BVL BVH BU
8 9 10 11
2k
4.5t 4.5t
56p 56p
100 1n
12 13 14 15
1n 1n 1n
VHF IN
UHF IN
2.2µ 1n
+5V
—11—
11 Page | ||
| Páginas | Total 35 Páginas | |
| PDF Descargar | [ Datasheet CXA3250N.PDF ] | |
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