Datasheet > AN8946SB

AN8946SB

更新时间： 2022-11-29 07:36:41

品牌	Logo	应用领域
松下 - PANASONIC		/
页数	文件大小	规格书
10页	88K
描述
FM demodulation IC for BS/CS broadcasting

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中文翻译

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AN8946SB 数据手册

ICs for TV

AN8946SB

■ Electrical Characteristics at T_a= 25°C

Parameter

Total circuit current

IF amp. maximum gain

Symbol

Conditions

Min

Typ Max Unit

I_TOT

V_CC= 5 V

GIF_maxPIF_IN= −60 dBm, f = 402.78 MHz

V₁₇= 5 V

IF amp. minimum gain

GIF_minPIF_IN= 0 dBm, f = 402.78 MHz

V₁₇= 0 V

−29

−25

Loop amp. gain

G_LA

G_VA

PLA in = −30 dBm, f = 1 MHz

PVA in = −10 dBm, f = 1 MHz

f = 402.78 MHz

6.5

7.0

Video amp. gain

7.5

VCO control sensitivity

41 MHz/V

Signal to noise ratio

S/N_maxPIF_IN= −30 dBm, 100%W, weighting 62

(C/N = ∞)

LPF 4.2 MHz, HPF 10 kHz

Inter-modulation interference

ratio (2nd)

IM₂

IM₃

PIF_IN= −30 dBm, f_C= 3.58 MHz

f_S= 5.7272 MHz

Inter-modulation interference

ratio (3rd)

PIF_IN= −30 dBm, f_C= 3.58 MHz

f_S= 5.7272 MHz

AFC dead-band width

BW_AFCPin 2: Low, Pin 3: High

310

360

420

0.5

0.2

0.5

0.2

0.5

−31

kHz

AFC output maximum voltage

AFC output minimum voltage

V_AFCHV_CC− V₃value, f = 402.78 MHz

V_AFCLV₂value, f = 402.78 MHz

0.1

AGC output maximum voltage 1 V_AGC1HV_CC− V₁₇value, PIF_IN= −70 dBm

AGC output minimum voltage 1 V_AGC1LPIF_IN= +10 dBm

0.3

AGC output maximum voltage 2 V_AGC2HV_CC− V₁₆value, PIF_IN= −70 dBm

AGC output minimum voltage 2 V_AGC2LPIF_IN= +10 dBm

0.3

−35

AGC SW level

Pin_SWf = 402.78 MHz, PIF_M= −50 dBm

Input level at V₁₆= 2.5 V

−39

dBm

Key pulse input maximum voltage V_KEYHDC measurement

Key pulse input minimum voltage V_KEYLDC measurement

0.35

0.1

Noise amplitude

V_N

f = 402.78 MHz with no modulation

and with de-emphasis

10 mV[p-p]

Measure it at Video out pin.

Pin 12 voltage

Pin 15 voltage

V₁₂

V₁₅

Voltage to get V₁₇= 0 V, V₂≤ 1 V,

1.0

1.35

1.7

V₃≥ 4 V with no PIF_IN

Voltage to be AFC center with no PIF_IN

1.03 1.15 1.27

V₁₇= 0 V, f_VCO= 402.78 MHz

• Design reference data

Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.

Parameter

IF amp. frequency characteristic

IF amp. NF

Symbol

f_CIF

Conditions

3 dB down frequency

Min

Typ Max Unit

600

700

MHz

NF_IF

f = 402.78 MHz, V₁₇= 5 V

3 dB down frequency

f = 1 MHz to 20 MHz

Loop amp. frequency characteristic

Loop amp. phase

f_CLA

200

250

±5

MHz

PH_LA

±10

1 234 5 6 7...10

中文翻译

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