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CXA3235N
Datasheet
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Sony CXA3235N, CXA3236N Datasheet

—1—
E97943A81-TE
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.
Absolute Maximum Ratings (Ta = 25 °C)
• Supply voltage VCC1,VCC2 –0.3 to +5.5 V
• Storage temperature Tstg –55 to +150 °C
• Allowable power dissipation
PD 880 mW
(when mounted on a substrate)
Operating Conditions
• Supply voltage VCC1, VCC2 4.75 to 5.30 V
• Operating temperature Topr –25 to +75 °C
Description
The CXA3235/3236N 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. The PLL on this IC supports the I2C bus format.
Features
• Low noise figure
• Low power consumption (5 V, 54 mA typ.)
• On-chip tuning PLL (I2C bus format)
• Selection of frequency steps 31.25 kHz, 50 kHz
and 62.5 kHz
• On-chip 4-output band switch
Applications
• TV tuners
• VCR tuners
• CATV tuners
Structure
Bipolar silicon monolithic IC
All Band TV Tuner IC with On-chip PLL
30 pin SSOP (Plastic)
CXA3235/3236N
Note) Electrostatic discharge strength is weak, and care should be taken in handling this IC.
—2—
CXA3235/3236N
Block Diagram and Pin Configuration
Bias
USW
IF AMP
SCL SDA
ADSW
FMT
BVL
BVH
BU
V
CC1
MIXout1 MIXout2
GND1
MS
VHFin
UHFin1
UHFin2
Shift Register
Band SW Driver
V.REG
VHF
MIX
UHF
MIX
Buffer
VHF
OSC
UHF OSC
Buffer
Buffer
Phase Detector
Charge Pump
LOCK Det
Divider 14/15bit
Prescaler 1/8
REF
OSC
Divider 1/512,640,1024
I2C BUS
Receiver
1 2 3
4
5
6
7
8
9
10
11
12
13
14
15
VOSC1
GND
VOSC2
UOSCB1
UOSCE2
UOSCB2
V
CC2
GND
IF OUT
LOCK
CPO
CPE
REFOSC
VCC3
UOSCE1
16
17
18
20
21
22
23
24
25
27
28
29
19
26
30
—3—
CXA3235/3236N
Pin Description
Pin
Symbol Equivalent circuit
Pin voltage
Description
No. (V)
1
2
3
4
5
6
7 8
9
10
11
SCL
SDA
ADSW
FMT
BVL
BVH
BU
VCC1
MIXout1
MIXout2
GND1
—
—
1.25
(when open)
ON : VCC3
OFF : 0
—
Clock input.
Data I/O.
Address selection. This pin controls bits 2 and 1 of the address byte.
4 : Output for FM TRAP. 5 : Power supply output for
VL band.
6 : Power supply pin for VH
band.
7 : Power supply output for
UHF band.
The pin corresponding to the selected band goes High.
Analog circuit power supply.
Mixer outputs.
Analog circuit GND.
1
22
VCC2
100k
5k
2
22
VCC2
100k
5k
3
22
150k
50k
VCC2
4 5
6 7
30
20k
VCC3
9
10
—
—4—
CXA3235/3236N
Pin
Symbol Equivalent circuit
Pin voltage
Description
No. (V)
12
13
14
15
16
18
17
19
20
21
22
MS
VHFin
UHFin1
UHFin2
VOSC1
VOSC2
GND
UOSCB1
UOSCE1
UOSCE2
UOSCB2
1.5
(when open)
2.3
(VHF)
0
(UHF)
0
(VHF)
2.3
(UHF)
0
(VHF)
2.3
(UHF)
3
(VHF)
3.1
(UHF)
3.5
(VHF)
5.0
(UHF)
—
3.2
(VHF)
2.9
(UHF)
—
(VHF)
2.4
(UHF)
—
(VHF)
2.4
(UHF)
3.2
(VHF)
2.9
(UHF)
Pin used for selecting a frequency step mode. Any of the five modes can be selected by applying an input voltage.
VHF input. The input format is unbalanced input.
UHF inputs. The input method can be selected from balanced input or unbalanced input.
External resonance circuit connection for VHF oscillator.
GND
External resonance circuit connection for UHF oscillator.
50k
VCC2
120k
1213
14
15
3k 3k
18 16
8
8p
3k
3k
15p
600
50
V
CC1
19 2220 21
3k
3k
V
CC1
—5—
CXA3235/3236N
Pin
Symbol Equivalent circuit
Pin voltage
Description
No. (V)
23 24
25
26
27
28
29
30
VCC2
GND2
IFOUT
LOCK
CPE
CPO
REFOSC
VCC3
— —
2.3
5.0
(Lock)
0.2
(UNLock)
0.6
2.0
4.3
—
PLL circuit power supply. PLL circuit GND.
IF output.
LOCK detection. High when locked, Low when unlocked.
NPN transistor connection for varicap diode drive.
Charge pump output. Connect a loop filter.
Crystal connection for reference oscillator.
Power supply for external supply.
25
8
40
V
CC1
26
22
VCC2
40k
28
27
22
VCC2
200
500
20k
29
60k
30p 30p
— —
—6—
CXA3235/3236N
Electrical Characteristics See the Electrical Characteristics Measurement Circuit. Circuit Current (VCC=5 V, Ta=25 °C)
Item
Circuit current A
Circuit current D
Symbol
AICCV
AICCU DICC
Measurement conditions VCC1 current, Band switch output open during VHF operation VCC1 current, Band switch output open during UHF operation VCC2 current
Min. Typ. Max. Unit
30 41 55 mA
31 42 56 mA
7 11 15 mA
Item
Conversion gain
∗1
Noise figure ∗1,
∗2
1 % cross modulation ∗1,
∗3
Maximum output power
Switch ON drift
∗4
Supply voltage drift
∗4
Symbol CG1 CG2 CG3 CG4 NF1 NF2 NF3 NF4
CM1
CM2
CM3
CM4 Pomax
∆fsw1
∆fsw2
∆fsw3
∆fsw4
∆fst1
∆fst2
∆fst3
∆fst4
Measurement conditions VHF operation fRF = 55 MHz VHF operation fRF = 360 MHz UHF operation fRF = 360 MHz UHF operation fRF = 800 MHz 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 UHF operation fD = 800 MHz, fUD = ±12 MHz 50 Ω load saturation output VHF operation fOSC = 100 MHz ∆f from 3 s to 3 min after switch ON VHF operation fOSC = 405 MHz ∆f from 3 s to 3 min after switch ON UHF operation fOSC = 405 MHz ∆f from 3 s to 3 min after switch ON UHF operation fOSC = 845 MHz ∆f from 3 s to 3 min after switch ON VHF operation fOSC = 100 MHz ∆f when VCC 5 V changes ±5 % VHF operation fOSC = 405 MHz ∆f when VCC 5 V changes ±5 % UHF operation fOSC = 405 MHz ∆f when VCC 5 V changes ±5 % UHF operation fOSC = 845 MHz ∆f when VCC 5 V changes ±5 %
Min. Typ. Max. Unit
21 24 27 dB 22 25 28 dB 26 29 32 dB 27 30 33 dB
12 15 dB 11 14 dB
8.5 12.5 dB
9.5 13.5 dB
97 101 dBµ
96 100 dBµ
92 96 dBµ
88 92 dBµ +5 +10 dBm
±300 kHz
±400 kHz
±400 kHz
±500 kHz
±150 kHz
±250 kHz
±200 kHz
±250 kHz
OSC/MIX/IF Amplifier Block
—7—
CXA3235/3236N
Item SDA, SCL “H” level input voltage “L” level input voltage “H” level input current “L” level input current SDA “L” output voltage Clock input hysteresis Clock rate CPO (charge pump) Output current 1 Output current 2 Leak current 1 Leak current 2 REFOSC Oscillator frequency range Input capacitance Drive level BVL, BVH, BU (Band SW) Output current Saturation voltage Leak current FMT (Band SW) Output current Saturation voltage Leak current Bus timing SCL clock frequency Start waiting time Start hold time Low hold time High hold time Start setup time Data hold time Data setup time Rise time Fall time Start setup time
Symbol
VIH VIL IIH IIL LSDA CIHYS CIRATE
ICPO1 ICPO2 LeakCP1 LeakCP2
FXTOSC CXTOSC
VXTOSC
IBS1 VSAT1 LeakBS1
IBS2 VSAT2 LeakBS2
fSCL tWSTA tHSTA tLOW tHIGH tSSTA tHDAT tSDAT tR tF tSSTO
Measurement conditions
VIH = VCC VIL = GND Sink current = 3 mA
Byte4/Bit6 = 0 Byte4/Bit6 = 1 Byte4/Bit6 = 0 Byte4/Bit6 = 1
When ON When ON Sink current = 20 mA When OFF
When ON When ON Sink current = 5 mA When OFF
See Timing Chart on Page 15. See Timing Chart on Page 15. See Timing Chart on Page 15. See Timing Chart on Page 15. See Timing Chart on Page 15. See Timing Chart on Page 15. See Timing Chart on Page 15. See Timing Chart on Page 15. See Timing Chart on Page 15. See Timing Chart on Page 15.
Min. Typ. Max. Unit
3 VCC V
GND 1.5 V
0 –0.1 µA
–1 –2 µA
0.4 V
0.25 0.4 0.65 V
0.5 MHz
±35 ±50 ±75 µA
±140 ±200 ±300 µA
30 nA
100 nA
3 12 MHz
17.5 19 20.5 pF 200 400 mVp-p
–25 mA
100 200 mV
0.5 3 µA
–7 mA
75 150 mV
0.03 0.1 µA
0 400 kHz
1300 ns
600 ns
1300 ns
600 ns 600 ns
1300 ns
600 ns
300 ns 300 ns
600 ns
PLL Block
∗1
Measured value for untuned inputs.
∗2
Noise figure is the direct-reading value of NF meter in DSB.
∗3
Desired signal (fD) input level is –30 dBm. Undesired signal (fUD) is 100 kHz, 30 % AM at ±12 MHz. The measurement value is undesired signal level, it measured with a spectrum analyzer at S/I=46 dB.
∗4
Value when the PLL is not operating.
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