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CXA1665中文资料

CXA1665AM/AM-S

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 = 25°C)?Supply voltage V CC 11V ?Storage temperature Tstg –65 to +150°C ?Allowable power dissipation P D 980mW

(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

V CC 9.0 ±0.9V ?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)

V O S C C

U O S C B 2

U O S C E 2

U O S C E 1

U O S C B 1/S W

R E G

U H F I N 2

U H F I N 1V O S C B

G N D

M I X O U T 1

M I X O U T 2

I F O U T

V C C

V H F I N 1

V H F I N 2

Pin Description and Equivalent Circuit

Electrical Characteristics

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

?1Measured value for untuned inputs.?2Noise figure is uncorrected for image.?3Desired signal (f D ) input level is –33dBm.undesired signal (f UD ) is 100kHz at 30% AM.

The measurement value is undesired signal level, it measured with a spectrum analyzer at S/I = 46dB.?4Design guaranteed items.

Condition

VHF operation;no signal UHF operation;no signal VHF operation;f RF = 55MHz;Input level –40dBm VHF operation;f RF = 360MHz;Input level –40dBm UHF operation;f RF = 360MHz;Input level –40dBm UHF operation;f RF = 800MHz;Input level –40dBm

VHF operation;f RF = 55MHz VHF operation;f RF = 360MHz UHF operation;f RF = 360MHz UHF operation;f RF = 800MHz

VHF operation;f D = 55MHz, f UD = ±12MHz VHF operation;f D = 360MHz, f UD = ±12MHz UHF operation;f D = 360MHz, f UD = ±12MHz UHF operation;f D = 800MHz, f UD = ±12MHz

50?load

VHF operation;f OSC = 100MHz

frequency drift for the time from 3s to 3min after switch ON VHF operation;f OSC = 405MHz

frequency drift for the time from 3s to 3min after switch ON UHF operation;f OSC = 405MHz

frequency drift for the time from 3s to 3min after switch ON UHF operation;f OSC = 845MHz

frequency drift for the time from 3s to 3min after switch ON VHF operation;f OSC = 100MHz

frequency shift when V CC + 9V changes ±5%VHF operation;f OSC = 405MHz

frequency shift when V CC + 9V changes ±5%UHF operation;f OSC = 405MHz

frequency shift when V CC + 9V changes ±5%UHF operation;f OSC = 845MHz

frequency shift when V CC + 9V changes ±5%

Min.3029

20202525

96948887+8

Typ.454423232828101078

100989291+11

Max.58572626313113131112

±300±500±500±500±200±250±250±250Unit mA mA dB dB dB dB dB dB dB dB dBμdBμdBμdBμdBm

kHz

kHz kHz kHz kHz

Item Circuit current

Conversion gain ?1

Noise

figure ?1?2?4

1% cross modulation

?1?3Max. output power

Switch ON drift ?4

+B supply voltage drift

Symbol I CC V I CC U CG1

CG2CG3CG4NF1

NF2NF3NF4CM1

CM2CM3CM4

Pomax

(sat)?fsw1

?fsw2

?fsw3

?fsw4?fst1?fst2?fst3?fst4

E l e c t r i c a l C h a r a c t e r i s t i c s M e a s u r e m e n t C i r c u i t

+9V

I F o u t +9V V H F i n

T a b l e 1. I n d u c t a n c e c o n s t a n t

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. The positive 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.

Example of Representative Characteristics

Conversion gain vs. Reception frequency (Untuned input)

C G — C o n v e r s i o n g a i n [d B ]

Reception frequency [MHz]

100

0200300400500600700800900

Noise figure vs. Reception frequency

(Untuned input, in DSB)

N F — N o i s e f i g u r e [d B ]

Reception frequency [MHz]

100

200300400500600700800

900

Circuit current vs. Supply voltage

I C C — C i r c u i t c u r r e n t [m A ]

V CC — Supply voltage [V]

I/O characteristics (Untuned input)

I F o u t p u t l e v e l [d B m ]

20RF input level [dBm]

–100+10

–20–30–40–50

–50

–40–30–20–100

10C M — C r o s s m o d u l a t i o n [d B μ]

120Reception frequency [MHz]

10080

200300400500600700800900

100

2060Next adjacent cross modulation vs. Reception frequency

(Untuned input)

j50

–j50

UHF Input Impedance

j50

–j50

j50

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-A

COPPER ALLOY

SOLDER PLATING EPOXY RESIN 16PIN SOP (PLASTIC) 300mil

9.9 – 0.1+ 0.4169

1.27

0.45 ± 0.15.3 – 0.1

0.37.9 ±

0.4

+ 0.4

0.2g

CXA1665AM-S

SONY CODE EIAJ CODE JEDEC CODE

SOP-16P-L04SOP016-P-0300

PACKAGE MATERIAL

LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT

EPOXY RESIN

SOLDER/PALLADIUM

COPPER ALLOY PACKAGE STRUCTURE

PLATING 0.1g

16PIN SOP(PLASTIC)

DETAIL A

NOTE: “?” Dimensions do not include mold protrusion.

+ 0.2