7/27/2019 cxa1665.pdf

1/10

1

CXA1665AM/AM-S

E95826A63-ST

All Band TV Tuner IC (VHF-CATV-UHF)

Description

The CXA1665AM/AM-S is a single chip TV tuner

IC which performs as an oscillator, mixer for

VHF/CATV and UHF bands. An IF amplifier is also

provided.

This IC adopts a 16-pin SOP package in response

to the trend toward miniaturizing the tuner and

automatic IC mounting. This IC achieves a large

reduction of external parts in addition to

miniaturizing the tuner and increasing manufacturing

productivity, reliability and design efficiency.

Features

On-chip oscillator and mixer for UHF band

Low noise figure

Reduced spurious interference

Superior cross modulation distortion

Stable oscillating characteristics

Absolute Maximum Ratings (Ta = 25C)

Supply voltage VCC 11 V

Storage temperature Tstg 65 to +150 C

Allowable power dissipation PD 980 mW(When mounted on a board)

Block Diagram and Pin Configuration (Top View)

Structure

Bipolar silicon monolithic IC

Applications

CTV tuner

CATV UP-DOWN converter

FM detector for 2nd IF satellite broadcasts

Operation Conditions

Supply voltage VCC 9.0 0.9 V

Operating temperature Topr 20 to +75 C

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.

16 pin SOP (Plastic)

SW UHF OSC UHF MIX

VHF MIX

IF

AMP

+

VHF OSC

VOSCC

UOSCB2

UOSCE2

UOSCE1

UOSCB1/SW

REG

UHFIN2

UHFIN1

VOSCB

GND

M

IXOUT1

M

IXOUT2

IFOUT

VCC

VHFIN1

VHFIN2

2 3 4 5 7 81

910111213141516

6

V.

REG

7/27/2019 cxa1665.pdf

2/10

2

CXA1665AM/AM-S

Pin Description and Equivalent Circuit

PinNo.

SymbolTypical

voltage (V)Equivalent circuit Description

1

16

VOSC B

VOSC C

3

4

MIX OUT1

MIX OUT2

Under VHF

operating; 3.5

Under UHFoperating; 3.7

6.7

9.0

7.5

7.3

7.5

7.3

VHF ocsillator.

Mixer output and IFamplifier input.

5 IF OUT

4.5

4.5

IF output.

2 GND 0 GND

6 VCC 9 Power supply.

16

6

1

800

25P

3k

VCC

3k

6VCC

4505k

3

4

450

5k

5

6VCC

55

7/27/2019 cxa1665.pdf

3/10

3

CXA1665AM/AM-S

7

8

VHF IN1

VHF IN2

3.2

3.3

3.2

3.3

VHF input; normally adecoupling capacitor isconnected at Pin 7 toGND and Pin 8 is usedfor input.

9

10

UHF IN1

UHF IN2

3.3

3.2

3.3

3.2

UHF input.The balanced input toPins 9 and 10, or adecoupling capacitor isconnected at Pin 10 toGND and Pin 9 is usedfor input.

11 REG 6

12UOSCB1/SW

13 UOSC E1

14 UOSC E2

15 UOSC B2

0

0

3.2

3.7

3.4

2.6

2.6

3.4

Regulator output.

UHF oscillator.Pin 12 is used for bothU/V switches.

3k3k

87

3k3k

109

11

6VCC

6

8k 8k

12 13 14 15

40k

VCC

20k

PinNo.

SymbolTypical

voltage (V)Equivalent circuit Description

7/27/2019 cxa1665.pdf

4/10

4

CXA1665AM/AM-S

Electrical Characteristics (See Electrical Characteristics Measurement Circuit. Ta = 25C, VCC = 9V)

1 Measured value for untuned inputs.

2 Noise figure is uncorrected for image.

3 Desired signal (fD) input level is 33dBm.

undesired signal (fUD) is 100kHz at 30% AM.The measurement value is undesired signal level, it measured with a spectrum analyzer at S/I = 46dB.

4 Design guaranteed items.

Condition

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

50 load

VHF operation; fOSC = 100MHzfrequency drift for the time from 3s to3min after switch ON

VHF operation; fOSC = 405MHzfrequency drift for the time from 3s to3min after switch ON

UHF operation; fOSC = 405MHzfrequency drift for the time from 3s to3min after switch ON

UHF operation; fOSC = 845MHzfrequency drift for the time from 3s to3min after switch ON

VHF operation; fOSC = 100MHzfrequency shift when VCC + 9V changes 5%

VHF operation; fOSC = 405MHzfrequency shift when VCC + 9V changes 5%

UHF operation; fOSC = 405MHzfrequency shift when VCC + 9V changes 5%

UHF operation; fOSC = 845MHzfrequency shift when VCC + 9V changes 5%

Min.

30

29

20

20

25

25

96

94

88

87

+8

Typ.

45

44

23

23

28

28

10

10

7

8

100

98

92

91

+11

Max.

58

57

26

26

31

31

13

13

11

12

300

500

500

500

200

250

250

250

Unit

mA

mA

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

dB

dBm

kHz

kHz

kHz

kHz

kHz

kHz

kHz

kHz

Item

Circuit current

Conversiongain1

Noisefigure1 2 4

1% crossmodulation

1 3

Max. outputpower

Switch ONdrift4

+B supplyvoltage drift

Symbol

ICCV

ICCU

CG1

CG2

CG3

CG4

NF1

NF2

NF3

NF4

CM1

CM2

CM3

CM4

Pomax(sat)

fsw1

fsw2

fsw3

fsw4

fst1

fst2

fst3

fst4

7/27/2019 cxa1665.pdf

5/10

5

CXA1665AM/AM-S

ElectricalCharacteristicsMeasurementCircuit

VOSCC

UOSCB2

UOSCE2

UOSCE1

UOSCB1/SW

REG

UHFIN2

UHFIN1

VOSCB

GND

MIXOUT1

MIXOUT2

IFOUT

VCC

VHFIN1

VHFIN2

2

3

4

5

6

7

8

1

9

10

11

12

13

14

15

16

4.7n

VC

51k L

2

51

k

68p

(RH)

0.5p

(UK)

1T363

1p(UK)

1p

1n

L1

51

1n

3k

51k

1n

51

V

H

VL

SW1

+9V

1T362

51k

16p

68p

68p

10T

3p

1n

1n

IFout

+9V

1n

1n

VHFin

UHFin 1n

1n

1n

10k

20k

SW2

ON:UHF

OFF:VHF

1n

0.5p

(U

K)

1T363

1T363

51k

L3

0.5p

(UK)

51k

3P

2P

3P

27p

(RH)

51k

9p(SL)

27p(RH

)

Table1.

Inductanceconstant

Wire

diameter

0.50.50.5

L1

L2

L3

+9V

Coil

diameter

3.23.23.8

Number

ofwindings

5.5

T

2.5

T

1.5

T

7/27/2019 cxa1665.pdf

6/10

6

CXA1665AM/AM-S

Description of Operation (See Electrical Characteristics Test Circuit.)

(1) VHF oscillator circuit

The differential oscillator circuit with an output at Pin 16 and an input at Pin 1.

Connect an LC resonance circuit comprising a varicap diode to Pin 16 through a coupling capacitor. Thepositive feedback from the resonance circuit is applied to Pin 1 through a feedback capacitor to execute

oscillation. Note that if a parasitic capacitance across Pins 1 and 16 is too large, it may cause undesired

oscillation.

(2) VHF mixer circuit

This is a double-balanced mixer having small leakage of local oscillation signal. The RF signal is input to Pins

7 and 8. In normal use, the signal is input to one pin while the other pin is connected to GND by decoupling

capacitor. The RF signal is converted to IF with the signal supplied from oscillator. The converted RF is sent to

the IF amplifier and output to Pins 3 and 4 simultaneously.

(3) UHF oscillator circuit

UHF oscillator is formed from two collector-grounded Colpitts oscillator, and oscillation is provided at the

differential input through an LC resonator circuit including a varicap diode.

The Pin 12 also functions as UHF/VHF switch pin.

(4) UHF mixer circuit

This is the double-balanced mixer like the VHF mixer. The RF signal is input to Pins 9 and 10. There is a

balanced differential input from pre-stage double tune circuit, or an unbalanced input to Pin 9 with the capacitor

connected at Pin 10 to GND. Balanced input achieves better NF rather than unbalanced input.

Otherwise, the conditions and usage are the same as those for the VHF mixer circuit.

(5) IF amplifier circuit

The mixer output signal is amplified by the IF amplifier and output to Pin 5. The output impedance is about

75.

(6) UHF/VHF switch circuit

UHF/VHF mode is selected by the DC voltage at Pin 12. UHF operation is chosen by inputting 9V through a

20k resistor, and VHF operation by inputting 0V. If the UHF switch voltage is 12V not 9V, adjust the

resistance to approximately 30k so that the DC voltage becomes almost equal between Pins 12 and 15. Be

sure to connect a resistor for discharging (approx. 10k) if OPEN not 0V is chosen for the VHF switch voltage.

Note on Usage

Care should be taken such as grounding in placing external parts because high frequencies are present.

Adjust accordingly to prevent heat problems with special care such as the GND pattern for heat dissipation at

the portion for IC mount where heat dissipations accumulate.

7/27/2019 cxa1665.pdf

7/10

7

CXA1665AM/AM-S

Example of Representative Characteristics

Conversion gain vs. Reception frequency (Untuned input)

CG

Convers

ionga

in[dB]

40

30

Reception frequency [MHz]

100

VHF

UHF

fIF = 45MHZ

20

10

00

200 300 400 500 600 700 800 900

Noise figure vs. Reception frequency(Untuned input, in DSB)

NF

Noise

figure

[dB]

20

15

Reception frequency [MHz]

100

VHF

UHF

fIF = 45MHZ

10

5

00

200 300 400 500 600 700 800 900

Circuit current vs. Supply voltage

ICC

Circu

itcurren

t[mA]

50

40

30

VCC Supply voltage [V]

8 9 10

VHF

UHF

I/O characteristics (Untuned input)

IFou

tpu

tleve

l[dBm

]

20

RF input level [dBm]

10 0 +1020304050

50

40

30

20

10

0

10

fIF = 45MHZ

fRF = 100MHZ (VHF)

CM

Crossmo

du

lation

[dB

]

120

Reception frequency [MHz]

100

80

40

00

200 300 400 500 600 700 800 900

fUD = fD + 12MHZ

fUD = fD 12MHZ

100

20

60

Next adjacent cross modulation vs. Reception frequency(Untuned input)

fIF = 45MHzInterference signal: 100kHz 30% AM

7/27/2019 cxa1665.pdf

8/10

8

CXA1665AM/AM-S

VHF Input Impedance

j50

j100

j150

j250

j50

j100

j150

j250

j25

j10

0

j25

j10

50

50MHz

100MHz

200MHz

400MHz

4 5 6 7 8

1n

S11

VHF IN1 VHF IN2

IC

UHF Input Impedance

j50

j100

j150

j250

j50

j100

j150

j250

j25

j10

0

j25

j10

50

600MHz800MHz

400MHz

1n

S11

UHF IN2 UHF IN1

IC

910111213

7/27/2019 cxa1665.pdf

9/10

9

CXA1665AM/AM-S

IF Output Impedance

j50

j100

j150

j250

j50

j100

j150

j250

j25

j10

0

j25

j10

5040MHz

50MHz

60MHz

7/27/2019 cxa1665.pdf

10/10

10

CXA1665AM/AM-S

Package Outline Unit: mm

CXA1665AM

PACKAGE STRUCTURE

PACKAGE MATERIAL

LEAD TREATMENT

LEAD MATERIAL

PACKAGE WEIGHT

SONY CODE

EIAJ CODE

JEDEC CODE

SOP-16P-L01

SOP016-P-0300-ACOPPER ALLOY

SOLDER PLATING

EPOXY RESIN

16PIN SOP (PLASTIC) 300mil

9.9 0.1+ 0.4

16 9

1 8

1.270.45 0.1

5.

3

0.

1

+

0.3

7.9

0.

4

6.

9

1.85 0.15+ 0.4

0.5

0.

2

0.2 0.05+ 0.1

0.1 0.05+ 0.2

0.2g

0.15

M 0.12

CXA1665AM-S

SONY CODE

EIAJ CODE

JEDEC CODE

SOP-16P-L04

SOP016-P-0300

PACKAGE MATERIAL

LEAD TREATMENT

LEAD MATERIAL

PACKAGE WEIGHT

EPOXY RESIN

SOLDER/PALLADIUM

COPPER ALLOY

PACKAGE STRUCTURE

PLATING

0.1g

16PIN SOP(PLASTIC)

0.1

0to 10

DETAIL A

NOTE: Dimensions do not include mold protrusion.

0.12 M

16 9

9.7 0.1

5.6

0.

1

0.4 0.05+ 0.1 1.27

1 8

0.15 0.02+ 0.05

A

1.25 0.1+ 0.2

0.5

0.

2

0.1 0.1

7.6

0.

2