Datasheet > TDA3857

TDA3857

更新时间： 2024-02-02 16:40:49

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
14页	114K
描述
Quasi-split sound processor with two FM demodulators

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TDA3857 数据手册

Philips Semiconductors

Product speciﬁcation

Quasi-split sound processor with two FM demodulators

TDA3857

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL

V_P

PARAMETER

MIN.

MAX.

8.8

UNIT

supply voltage (pin 19)

−

V_I

voltage (pins 1, 6, 7, 13, 15, 17 and 20)

total power dissipation

V_P

P_tot

635

+150

+70

°C

T_stg

T_amb

V_ESD

storage temperature

−25

operating ambient temperature

electrostatic handling (note 1)

all pins except pins 1 and 20

pins 1 and 20

±500

+400

−500

−

Note to the Limiting Values

1. Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor.

CHARACTERISTICS

V_P= 5 V and T_amb= +25 °C; measurements taken in Fig.3 with f_VC= 38.9 MHz, f_SC1= 33.4 MHz and

_SC2= 33.158 MHz. Vision carrier (VC) modulated with different video signals, modulation depth 100% (proportional to

10% residual carrier).

Vision carrier amplitude (RMS value) V_{i VC}= 10 mV; vision to sound carrier ratios are VC/SC1 = 13 dB and

VC/SC2 = 20 dB. Sound carriers (SC1, SC2) modulated with f = 1 kHz and deviation ∆f = 50 kHz, unless otherwise

speciﬁed.

SYMBOL

V_P

I_P

IF ampliﬁer (pins 1 and 20)

PARAMETER

supply voltage (pin 19)

supply current (pin 19)

CONDITIONS

MIN.

4.5

TYP. MAX.

UNIT

8.8

R_I

input resistance

input capacitance

DC input voltage

1.8

−

2.2

−

kΩ

C_I

2.0

2.6

−

V_I

−

1.75

100

V_{i IF (RMS)}

maximum input signal (RMS value,

pins 1-20)

V_o= +1 dB

−

input signal sensitivity (RMS value)

−3 dB intercarrier signal

−

100

µV

reduction at pin 15

∆G_v

V₂

IF gain control

1.7

−

voltage for gain control (pin 2)

IF bandwidth

2.6

−

−3 dB

MHz

Resonance ampliﬁer (pins 10-11)

V_{o (p-p)}

vision carrier amplitude

(peak-to-peak value)

f_o= 38.9 MHz

−

270

−

R_10-11

operating resistance

inductance

−

kΩ

µH

Figs 3 and 4

0.247

capacitance

June 1994

1...3 4 567 8 9...14

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