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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 = 25C) * Supply voltage VCC 11 V * Storage temperature Tstg -65 to +150 C * Allowable power dissipation PD 980 mW (When mounted on a board) 16 pin SOP (Plastic)
Structure Bipolar silicon monolithic IC Applications * CTV tuner * CATV UP-DOWN converter * FM detector for 2nd IF satellite broadcasts Operation Conditions * Supply voltage * Operating temperature
VCC 9.0 0.9 Topr -20 to +75
V C
Block Diagram and Pin Configuration (Top View)
UOSC B2 UOSC E2 UOSC E1 VOSC C
UOSC B1/SW
UHF IN2
16
15
14
13
REG
12
11
10
SW
UHF OSC
UHF MIX
VHF OSC - IF + AMP 1 2 3 4 5 V. REG 6
VHF MIX
7
MIX OUT1
MIX OUT2
IF OUT
GND
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-
VHF IN1
VHF IN2
VOSC B
VCC
UHF IN1
9 8
E95826A63-ST
CXA1665AM/AM-S
Pin Description and Equivalent Circuit Pin No. Symbol Typical voltage (V) Under VHF operating; 3.5 1 VOSC B Under UHF operating; 3.7
16 1 3k 3k 800
Equivalent circuit
Description
VCC
6
VHF ocsillator.
6.7
25P
16
VOSC C 9.0
2
GND
0 7.5
GND
VCC 450 450
6 5k
3
MIX OUT1 7.3
3 4
5k
Mixer output and IF amplifier input.
7.5 4 MIX OUT2 7.3
VCC
6
4.5
5
IF OUT
55 5
IF output.
4.5
6
VCC
9
Power supply.
-2-
CXA1665AM/AM-S
Pin No.
Symbol
Typical voltage (V) 3.2
Equivalent circuit
Description
7
VHF IN1 3.3
7 3k 3k 8
3.2 8 VHF IN2 3.3
VHF input; normally a decoupling capacitor is connected at Pin 7 to GND and Pin 8 is used for input.
3.3 9 UHF IN1 3.2
9 3k 3k 10
3.3 10 UHF IN2 3.2
UHF input. The balanced input to Pins 9 and 10, or a decoupling capacitor is connected at Pin 10 to GND and Pin 9 is used for input.
VCC
6
11
REG
6
11
Regulator output.
12
UOSC B1/SW
0 3.4 0
12 13 14 15 VCC 20k 6
13
UOSC E1 2.6 3.2
40k 8k
14
UOSC E2 2.6 3.7
8k
UHF oscillator. Pin 12 is used for both U/V switches.
15
UOSC B2 3.4
-3-
CXA1665AM/AM-S
Electrical Characteristics Item Circuit current Symbol ICCV ICCU CG1 Conversion gain1 CG2 CG3 CG4 NF1 Noise figure1 2 4 NF2 NF3 NF4 CM1 1% cross modulation 1 3 Max. output power CM2 CM3 CM4
(See Electrical Characteristics Measurement Circuit. Ta = 25C, VCC = 9V) Condition Min. Typ. Max. Unit 30 29 Input level -40dBm Input level -40dBm Input level -40dBm Input level -40dBm 20 20 25 25 45 44 23 23 28 28 10 10 7 8 96 94 88 87 +8 100 98 92 91 +11 58 57 26 26 31 31 13 13 11 12 mA mA dB dB dB dB dB dB dB dB dB dB dB dB dBm
VHF operation; no signal UHF operation; no signal VHF operation; fRF = 55MHz; VHF operation; fRF = 360MHz; UHF operation; fRF = 360MHz; UHF operation; fRF = 800MHz; 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
Pomax 50 load (sat) fsw1 VHF operation; fOSC = 100MHz frequency drift for the time from 3s to 3min after switch ON VHF operation; fOSC = 405MHz frequency drift for the time from 3s to 3min after switch ON UHF operation; fOSC = 405MHz frequency drift for the time from 3s to 3min after switch ON UHF operation; fOSC = 845MHz frequency drift for the time from 3s to 3min after switch ON VHF operation; fOSC = 100MHz frequency shift when VCC + 9V changes 5% VHF operation; fOSC = 405MHz frequency shift when VCC + 9V changes 5% UHF operation; fOSC = 405MHz frequency shift when VCC + 9V changes 5% UHF operation; fOSC = 845MHz frequency shift when VCC + 9V changes 5%
300 kHz
fsw2 Switch ON drift4 fsw3
500 kHz
500 kHz
fsw4 fst1 fst2 fst3 fst4
500 kHz
200 kHz 250 kHz 250 kHz 250 kHz
+B supply voltage drift
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. -4-
Electrical Characteristics Measurement Circuit
Table 1. Inductance constant VC +9V
4.7n L3 51k 0.5p (UK) 10k 20k UHF in 51k 0.5p (UK) 27p (RH) 51k 3P 1n 16 15 14 13 12 11 10 1n 9 1n 1T363 1T363 SW2 ON:UHF OFF:VHF 1n
L1 L2 L3
Wire diameter 0.5 0.5 0.5
Coil Number diameter of windings 3.2 5.5T 3.2 2.5T 3.8 1.5T
68p (RH) 51k 51k 0.5p (UK) 1T363 1p (UK) 3P 2P 27p (RH) 9p (SL) 1n 1p L2
L1
3k
1n
51
VOSC C
UOSC B2
UOSC E2
UOSC E1
1T362
VL
VH
VCC
GND
VOSC B
MIX OUT1
MIX OUT2
IF OUT
1 16p 51k
2
3 10T 68p 68p
4
5
6
VHF IN1
7
3p
1n
1n
1n
VHF IN2
8 1n IF out +9V VHF in
SW1
CXA1665AM/AM-S
+9V
UOSC B1/SW
51
1n
51k
UHF IN2
UHF IN1 REG
-5-
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. 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.
-6-
CXA1665AM/AM-S
Example of Representative Characteristics
Circuit current vs. Supply voltage Conversion gain vs. Reception frequency (Untuned input)
40 50 fIF = 45MHZ VHF UHF
CG -- Conversion gain [dB]
ICC -- Circuit current [mA]
30
UHF VHF
40
20
10
30 0 8 9 VCC -- Supply voltage [V] 10 0 100 200 300 400 500 600 700 800 900 Reception frequency [MHz]
Noise figure vs. Reception frequency (Untuned input, in DSB)
20 fIF = 45MHZ
Next adjacent cross modulation vs. Reception frequency (Untuned input)
120
100
NF -- Noise figure [dB]
15
CM -- Cross modulation [dB]
80 fUD = fD + 12MHZ fUD = fD - 12MHZ 60
10 VHF UHF 5
40 fIF = 45MHz Interference signal: 100kHz 30% AM 20
0 0 100 200 300 400 500 600 700 800 900 Reception frequency [MHz]
0 0 100 200 300 400 500 600 700 800 900 Reception frequency [MHz]
I/O characteristics (Untuned input)
20 10 0
IF output level [dBm]
-10 -20 -30 -40 -50 fIF = 45MHZ fRF = 100MHZ (VHF)
-50
-40 -30 -20 -10 RF input level [dBm]
0
+10
-7-
CXA1665AM/AM-S
VHF Input Impedance
j50
j25
j100
j150
j10
j250
50MHz 0 50 100MHz 200MHz -j10 400MHz -j250 IC -j150 4 -j25 -j100 1n S11 -j50 5 6 VHF IN1 VHF IN2 7 8
UHF Input Impedance
j50
j25
j100
j150
j10
j250
0
50
-j10
400MHz
-j250 S11 1n 13 12 11 10 9
-j150 600MHz 800MHz -j25 -j100
UHF IN2 UHF IN1 -j50 IC
-8-
CXA1665AM/AM-S
IF Output Impedance
j50
j25
j100
j150
j10 50MHz 60MHz 0 40MHz 50
j250
-j10
-j250
-j150
-j25
-j100
-j50
-9-
CXA1665AM/AM-S
Package Outline CXA1665AM
Unit: mm
16PIN SOP (PLASTIC) 300mil
+ 0.4 9.9 - 0.1
+ 0.4 1.85 - 0.15
16
9 0.15 + 0.2 0.1 - 0.05
+ 0.3 5.3 - 0.1
7.9 0.4
0.45 0.1
1.27
+ 0.1 0.2 - 0.05
0.12 M
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE PACKAGE WEIGHT SOP-16P-L01 SOP016-P-0300-A LEAD TREATMENT LEAD MATERIAL EPOXY RESIN SOLDER PLATING COPPER ALLOY
0.2g
CXA1665AM-S
16PIN SOP(PLASTIC)
+ 0.2 1.25 - 0.1 9.7 0.1 0.1 9
16
5.6 0.1
A
1 0.12 M + 0.1 0.4 - 0.05
8 1.27 + 0.05 0.15 - 0.02
0.1 0.1
0 to 10 NOTE: "" Dimensions do not include mold protrusion. DETAIL A
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SOP-16P-L04 SOP016-P-0300 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER/PALLADIUM PLATING COPPER ALLOY 0.1g
- 10 -
0.5 0.2
7.6 0.2
0.5 0.2
1
8
6.9

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