STV2247H(2009) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STV2247H
(Rev.:2009)

I²C bus-controlled multistandard single chip TV processor

STMicroelectronics 

STV224X, STV228X, STV223X - ELECTRICAL CHARACTERISTICS

4.4.7 SIF Amplifier

Symbol

Parameter

VINSIF SIF Input Sensitivity

GRSIF

CINSIF

RINSIF

Gain Control Range

Differential Input Capacitance

Differential Input Resistance

Test Conditions

Min.

- 3dB at AM/FMOUT Pin (see Note 5)

AM output amplitude,

FM subcarrier amplitude

- 3dB to +1dB at AM/FMOUT Pin

SIF Inputs (see Note 6)

1.5

SIF Inputs

1.5

Typ.

55

40

60

2

2

Max. Unit

µVRMS

dB

2.5 pF

2.5 kΩ

Note 5: L standard Sc/Pc = -10 dB, Nyquist Pc = -6 dB, SIF input -4 dB with PIF input = 84 µV, BG standard Sc/Pc = -

13 dB, Nyquist Pc = -6 dB, SIF input -7 dB with PIF input = 85 µV.

Note 6: This parameter is not tested during production. It is tested on the validation bench during the qualification phase.

4.4.8 SIF AGC (FM)

Symbol

) IC

t(s ID

Parameter

Charging Current

Discharging Current

Test Conditions

Min. Typ. Max. Unit

2.4

mA

100

µA

c 4.4.9 SIF AGC (AM)

u Symbol

rod INORMAL

IFAST

Parameter

Charging/Discharging Current

Charging/Discharging Current

Test Conditions

Normal time constant

Fast time constant

Min. Typ. Max. Unit

±6

µA

±2.4

mA

P 4.4.10 FM Demodulator

te Electrical parameter valid in both QSS and Intercarrier modes, unless otherwise specified.

le Symbol

o SIFMin

bs VOAF

O DFMX

- _norm

t(s) DFMX

_w_qss

c THD_FM

du S/N

ro AMR

SVR

te P S/N

levsvideo

Parameter

Test Conditions

Min.

Min. Broadcast Sound/Video Carri- Intercarrier mode: SAW filter K2955M

er Ratio

at SNR 35 dB

FM Audio Output Amplitude at AM/ FM dev = ±27 kHz BGDKI

FMOUT Pin

FM dev = ±13.5 kHz MN

400

Maximum FM Deviation

THD < 10%, normal audio mode,

AF = 1 kHz

Maximum FM Deviation

QSS mode, Audio FM Wide mode

(reg 04h, d3d2 = 11),

AF = 1 kHz

Total Harmonic Distortion

FM dev = ±27 kHz BGDKI

Audio S/N

Weighted according to CCIR468-4

Quasi-Peak

Amplitude Modulation Rejection m = 30%, AF = 1 kHz

Supply Voltage Rejection

See Note 4

Intercarrier mode: SAW filter K2955M

S/N versus picture content, Inter- Black picture,

carrier mode

White picture,

250 kHz squarewave

Typ.

-30

500

200

400

0.3

55

32

45

52

50

52

Max. Unit

dB

630 mVRMS

kHz

kHz

1

%

dB

dB

dB

dB

o4.4.11 De-emphasis

bs Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

deemp-T1 De-emphasis Time Constant

B,G,D,K,I standards

50

µs

deemp-T2 De-emphasis Time Constant

M, N, standards

75

µs

29/86

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