Document
CXA3185/3186N
All Band TV Tuner IC with On-chip PLL
Description The CXA3185/3186N 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 • Low noise figure • Low power consumption (5 V, 54 mA typ.) • On-chip tuning PLL (3-wire 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 30 pin SSOP (Plastic)
Absolute Maximum Ratings (Ta = 25 °C) • Supply voltage VCC1,VCC2 –0.3 to +5.5 VCC3 –0.3 to +10.0 • Storage temperature Tstg –55 to +150 • Allowable power dissipation PD 880
V V °C
mW (when mounted on a substrate)
Operating Conditions • Supply voltage VCC1, VCC2 VCC3 • Operating temperature Topr
4.75 to 5.3 4.75 to 9.45 –20 to +75
V V °C
Note) Electrostatic discharge strength is weak, and care should be taken in handling this IC.
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.
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E97944-TE
CXA3185/3186N
Block Diagram and Pin Configuration
CL DA CE FMT
1 2 3 4 5 6
Divider 14/15bit Band SW Driver Phase Detector Charge Pump Input Buffer Shift Register Divider 1/512,640,1024 REF OSC
30 29
VCC3 REFOSC
28 27
CPO CPE LOCK
BVL
BVH
LOCK Det
26
BU
7
USW Prescaler 1/8
25
IF OUT
VCC1
8
V.REG
Bias
24
GND
IF AMP
23
VCC2
MIXout1
9
Buffer
22 21 20 19
UOSCB2 UOSCE2 UOSCE1 UOSCB1
MIXout2 10 GND1 11 MS 12 VHFin 13 Buffer VHF MIX UHF OSC
18 Buffer UHFin1 14 UHFin2 15 UHF MIX VHF OSC 17 16
VOSC2 GND VOSC1
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CXA3185/3186N
Pin Description Pin No. Symbol
22 100k 5k
Equivalent circuit
VCC2
Pin voltage (V)
Description
1
CL
1
—
Clock input.
22 100k 5k
VCC2
2
DA
2
—
Data input.
22 150k
VCC2
3
CE
3
50k
1.25 Enable pin. (when open)
4
FMT
30 VCC3 20k
5
BVL
4 5 6
ON : Vcc3 OFF : 0
6
BVH
7
4 : Output for FM TRAP. 5 : Power supply output for VL band. 6 : Power supply output for VH band. 7 : Power supply output for UHF band. The selected band pin goes High. Analog circuit power supply.
7 8
BU VCC1
9
10
9
MIXout1
Mixer outputs. 10 MIXout2
11
GND1
— —3—
—
Analog circuit GND.
CXA3185/3186N
Pin No.
Symbol
Equivalent circuit
VCC2
Pin voltage (V)
Description
12
MS
120k
50k
13
VHFin
13 12
14
UHFin1
14
15 3k 3k
15
UHFin2
18
16 VCC1 50
16
VOSC1
8
8p 3k
600
18
VOSC2
3k 15p
17
GND
19
UOSCB1
19
20
21
22 VCC1
20
UOSCE1
3k
21
UOSCE2
3k
22
UOSCB2
Frequency step mode 1.5 selection. Five modes can be (when open) selected according to the applied voltage. 2.3 VHF input. (VHF) The input format is unbalanced 0 input. (UHF) 0 (VHF) 2.3 UHF input. (UHF) The input method can be 0 selected from balanced input (VHF) or unbalanced input. 2.3 (UHF) 3.0 (VHF) 3.1 (UHF) External resonance circuit 3.5 connection for VHF oscillator. (VHF) 5.0 (UHF) — GND 3.2 (VHF) 2.9 (UHF) — (VHF) 2.4 (UHF) External resonance circuit — connection for UHF oscillator. (VHF) 2.4 (UHF) 3.2 (VHF) 2.9 (UHF)
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CXA3185/3186N
Pin No. 23 24
Symbol VCC2 GND2
8
Equivalent circuit — —
VCC1
Pin voltage Description (V) — PLL circuit power supply. — PLL circuit GND.
25
IFOUT
25
40
2.3
IF output.
VCC2 40k
22
26
LOCK
26
5.0 (Lock) 0.2 (UNLock)
LOCK detection. High when locked, Low when unlocked.
VCC2
22
27
CPE
200 28 500
0.6
NPN transistor connection for varicap diode drive.
28
CPO
27 20k
2.0
Charge pump output. Connect a loop filter.
60k 30p 30p
29
REFOSC
29
4.3
Crystal connection for reference oscillator.
30
VCC3
—
Power supply for external supply.
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CXA3185/3186N
Electrical Characteristics Circuit Current Item Circuit current A Symbol AICCV AICCU Circuit current D DICC
See the Electrical Characteristics Measurement Circuit. (VCC=5 V, Ta=25 °C) Measurement conditions VCC1 current, Band switch output open during VHF operation VCC1 current, Band switch output open during UHF operation VCC2 current Min. 30 31 7 Typ. 41 42 11 Max. 55 56 15 Unit mA mA mA
OSC/MIX/IF Amplifier Block Item Symbol Conversion gain ∗1 CG1 CG2 CG3 CG4 Noise figure ∗1, ∗2 NF1 NF2 NF3 NF4 1 % cross CM1 modulation ∗1, ∗3 CM2 CM3 CM4
Maximum output power
Pomax ∆fsw1 ∆fsw2 ∆fsw3 ∆fsw4
Switch ON drift ∗4
Supply voltage drift ∆fst1 ∗4 ∆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 .