Sony CXA3250AN Datasheet

—1—

E99866-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

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 V

VCC3 4.75 to 9.45 V

• Operating temperature Topr –25 to +75 °C

Description

The CXA3250AN 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.

Features

• 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)

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)

CXA3250AN

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.

For the availability of this product, please contact the sales office.

—2—

CXA3250AN

Block Diagram and Pin Configuration

Shift
Register

Programable
Divider
14/15bit

Divider
1/64, 80, 128

BUS
Interface

REF
OSC

Charge
Pump

LOCK
Det

IF AMP

Buffer

VHF

MIX

Mode
Select

V.REG

Band
SW
Driver

UHF
OSC

VHF
OSC

Bias

Phase
Detector

ADC

VHF

MIX

Buffer

Buffer

UHF

MIX

VSW

23

24

25

26

28

29

30

27

19

20

21

22

16

17

18

1
2
3

4

5

6

7

8

9

10
11

12
13

14
15

CL

DA

ADSW
/CE

BS3

BS1

BS2

BS4

V

CC1

MIXout1

MIXout2

GND1

BYP/MS

VHFin

UHFin1

UHFin2

V

CC3

REFOSC

CPO
VT

LOCK
/ADC

IFOUT

GND2

VCC2

UOSCB2

UOSCE2

UOSCE1

UOSCB1

VOSC2
GND
VOSC1

—3—

CXA3250AN

Pin Description

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

Symbol

CL
DA

CE/ADSW

BS3
BS1
BS2
BS4

VCC1

MIXOUT1

MIXOU2

GND1

BYP/MS

VHFIN
UHFIN1
UHFIN2

VOSC1

GND

VOSC2
UOSCB1
UOSCE1
UOSCE2
UOSCB2

VCC2

GND2

IFOUT

LOCK/ADC

VT

CPO

REFOSC

VCC3

Description
CLOCK/SCL (I2C bus)
DATA/SDA (I2C bus)
Enable/address selection (I2C bus)
Band switch output 3
Band switch output 1
Band switch output 2
Band switch output 4
Analog circuit VCC
MIX output
MIX output
Analog circuit GND
VHF input GND and control bus switching
VHF input
UHF input
UHF input
VHF oscillator (base input)
GND
VHF oscillator (collector output)
UHF oscillator (base pin)
UHF oscillator (emitter pin)
UHF oscillator (emitter pin)
UHF oscillator (base pin)
PLL circuit VCC
PLL circuit GND
IF output
LOCK signal output/ADC input (I2C bus)
VC drive voltage output (open collector)
Charge pump output (loop filter connection)
Crystal connection
Band switch power supply

—4—

CXA3250AN

Pin Description and Equivalent Circuit

Pin

Symbol

Pin voltage

Equivalent circuit Description

No. [V]

1

2

3

4

7

5

6

8

CL

DA

ADSW/CE

BS3

BS4

BS1

BS2

VCC1

—

—

1.25

(when open)

ON : 4.8

OFF : 0.0

—

40k

1

23

40k

2.5p

2

23

20

150k

50k

5p

3

23

7

30

4

6

30

5

25k

12k

Clock input.

Data input.

I2C bus setting :

Address selection.
Bits 1 and 2 of the address byte
are controlled.

3-wire bus setting :

Enable input.

Band switch outputs.
The pin corresponding to the
selected band goes High.

Analog circuit power supply.—

—5—

CXA3250AN

Pin

Symbol

Pin voltage

Equivalent circuit Description

No. [V]

9

10

11

12

13

14

15

16

18

17

MIXOUT1

MIXOUT2

GND1

BYP/MS

VHFin

UHFin1

UHFin2

VOSC1

VOSC2

GND

—

—

—

3.8 during

VHF reception

3.8 during

UHF reception

2.6 during

VHF reception

0.1 during

UHF reception

2.6 during

UHF reception

0.1 during

VHF reception

2.6 during

UHF reception

0.1 during

VHF reception

2.1 during

VHF reception

2.3 during

UHF reception

4.2 during

VHF reception

5.0 during

UHF reception

—

9

10

24k

15p

3k 3k

76k

8

12

13

23

3k 3k

8

14
15

3k 3k

50

400

8

16

18

Mixer output.
These pins output the signal with
open collector, and they must be
connected to the power supply via
the load.

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.

External resonance circuit
connection for VHF oscillator.

GND for separating the analog and
PLL systems.

—

—

—6—

CXA3250AN

Pin

Symbol

Pin voltage

Equivalent circuit Description

No. [V]

19

20

21

22

23
24

25

26

UOSCB1

UOSCE1

UOSCE2

UOSCB2

VCC2

GND2

IFOUT

LOCK/ADC

2.1 during

UHF reception

2.3 during

VHF reception

1.4 during

UHF reception

1.8 during

VHF reception

1.4 during

UHF reception

1.8 during

VHF reception

2.1 during

UHF reception

2.3 during

VHF reception

—
—

2.7

—

3k

3k

8

19

20

21

22

8

25

250

5k
500k

23

26

External resonance circuit
connection for UHF oscillator.

PLL circuit power supply.
PLL circuit GND.

IF output.

I2C bus setting :

5-level A/D converter input.

3-wire bus setting :

Lock detection.
Low when locked, High when
unlocked.

—
—

—7—

CXA3250AN

Pin

Symbol

Pin voltage

Equivalent circuit Description

No. [V]

27

28

29

30

VT

CPO

REFOSC

VCC3

—

2.0

4.3

—

70

23

27

28

60k

30p

30p

29

Varicap drive voltage output.
This pin outputs the signal with
open collector, and this must be
connected to the tuning power
supply via the load.

Charge pump output.
Connects the loop filter.

Crystal connection for reference
oscillator.

Power supply for external supply.—

—8—

CXA3250AN

Electrical Characteristics

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

38 52 70 mA

39 53 71 mA
10 16 22 mA

Item

Conversion gain

Noise figure

∗1, ∗2

1 % cross

∗1, ∗3

modulation

Maximum output
power
Switch ON drift

∗4

Symbol
CG1
CG2
CG3
CG4
NF1
NF2
NF3
NF4

CM1

CM2

CM3

CM4

Pomax

∆ fsw1

∆ fsw2

∆ fsw3

∆ fsw4

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

Min. Typ. Max. Unit

18 21 24 dB
19 22 25 dB

22.5 25.5 28.5 dB
24 27 30 dB

12 15 dB
11 14 dB
10 13 dB
11 14 dB

100 104 dBµ

99 103 dBµ

96 100 dBµ

90 94 dBµ

+8 +11 dBm

±300 kHz

±600 kHz

±350 kHz

±350 kHz

OSC/MIX/IF Amplifier Block

—9—

CXA3250AN

Item
Supply voltage ∗4
drift

Oscillator phase
noise
Reference leak

Lock-up time

Symbol

∆ fst1

∆ fst2

∆ fst3

∆ fst4

C/N V
C/N U

REFL

LUT 1

LUT 2

Measurement conditions
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 %
10 kHz offset
10 kHz offset
Phase comparison frequency of

62.5 kHz, CP : 1
VHF operation fOSC=95 MHz ⇔
fOSC=395 MHz CP : 1
UHF operation fOSC=413 MHz ⇔
fOSC=847 MHz CP : 1

Min. Typ. Max. Unit

±200 kHz

±250 kHz

±150 kHz

±150 kHz

82

dBc/Hz

78
55 dB

24 70

ms

36 70

∗1 Value measured with untuned input.
∗2 NF meter direct-reading value (DSB measurement).
∗3 Value with a desired reception signal input level of –30 dBm, an interference signal of 100 kHz/30 % AM,

and an interference signal level where S/I=46 dB measured with a spectrum analyzer.

∗4 Value when the PLL is not operating.

—10—

CXA3250AN

Item
CL, DA and CE pins
“H” level input voltage
“L” level input voltage
“H” level input current
“L” level input current
CE input
“H” level input voltage
“L” level input voltage
“H” level input current
“L” level input current
SDA output
“H” output leak current
“L” output voltage
CPO (charge pump)
Output current 1
Leak current 1
Output current 2
Leak current 2
VT (VC voltage output)
Maximum output voltage
Minimum output voltage
LOCK
“H” output voltage
“L” output voltage
REFOSC
Oscillation frequency range
Input capacitance
Negative resistance
Band SW
Output current
Saturation voltage
Leak current
Bus timing (I2C bus)
SCL clock frequency
Start waiting time
Start hold time
“L” hold time
“H” hold time
Start setup time
Data hold time
Data setup time

Symbol

VIH
VIL
IIH
IIL

VIH
VIL
IIH
IIL

ISDALK
VSDAL

ICPO1
LeakCP1
ICPO2
LeakCP2

VTH
VTL

VLOCKH
VLOCKL

FXTOSC
CXTOSC
RNEG

IBS
VSAT
LeakBS

fSCL
tWSTA
tHSTA
tLOW
tHIGH
tSSTA
tHDAT
tSDAT

Measurement conditions

VIH=VCC
VIL=GND

VIH=VCC
VIL=GND

Vin=5.5 V
Iout=–3 mA

Byte4/bit6=0
Byte4/bit6=0
Byte4/bit6=1
Byte4/bit6=1

When locked
When unlocked

Crystal source impedance

When ON
When ON Source current=20 mA
When OFF

Min. Typ. Max. Unit

3 VCC V

GND 1.5 V

0 –0.1 µA

–0.3 –4 µA

3 VCC V

GND 1.5 V

–100 –200 µA

35 100 µA

5 µA

GND 0.4 V

±35 ±50 ±75 µA

30 nA

±140 ±200 ±300 µA

100 nA

33 V

0.5 0.8 V

VCC–0.5 VCC V

0 0.5 V

3 12 MHz

22 24 26 pF

–2.0 –1.0 kΩ

–25 mA

120 240 mV

0.5 3 µA

0 400 kHz

1300 ns

600 ns

1300 ns

600 ns
600 ns

0 900 ns

600 ns

PLL Block

—11—

CXA3250AN

Item
Rise time
Fall time
Stop setup time
Bus timing (3-wire bus)
Data setup time
Data hold time
Enable waiting time
Enable setup time
Enable hold time

Symbol
tR
tF
tSSTO

tSD
tHD
tWE
tSE
tHE

Measurement conditions Min. Typ. Max. Unit

300 ns
300 ns

600 ns

300 ns
600 ns
300 ns
300 ns
600 ns

PLL Block