Datasheet > TDA8751T

TDA8751T

更新时间： 2024-01-30 09:53:05

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
24页	135K
描述
QPSK receiver

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技术参数
数据手册

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TDA8751T 技术参数

生命周期：	Obsolete	Reach Compliance Code：	compliant
风险等级：	5.84

TDA8751T 数据手册

Philips Semiconductors

Product speciﬁcation

QPSK receiver

TDA8051

FEATURES

GENERAL DESCRIPTION

• High operating input sensitivity

• Gain controlled amplifier

This TDA8051 is a monolithic bipolar IC intended for

Quadrature Phase Shift Key (QPSK) demodulation. It

includes:

• PLL controlled carrier frequency

• Low crosstalk between I and Q channel outputs

• 3-wire transmission bus

• Low noise RF and gain controlled amplifier

• Two matched mixers

• Symmetrical Voltage Controlled Oscillator (VCO) with

0 to 90° signal generator whose frequency is controlled

by an integrated Phase Lock Loop (PLL) circuit.

• 5 V supply voltage.

APPLICATIONS

• Two matched amplifiers for output base-band active

filtering and output buffers

• BPSK/QPSK demodulation.

The gain control is produced by output level detection

compared with an external pre-fixed reference. The PLL

consists of:

• Divide by four preamplifier

• 12-bit programmable main divider

• Crystal oscillator with 8-bit programmable reference

divider

• Phase/frequency detector combined with charge pump

to drive tuning amplifier

• 30 V output

QUICK REFERENCE DATA

All AC units are RMS values unless otherwise speciﬁed.

SYMBOL

V_CC

PARAMETER

supply voltage range

MIN.

4.75

TYP.

5.00

MAX.

5.25

UNIT

f_I(LNA)

V_I(LNA)

∆Φ_I-Q

∆G_I-Q

α_CT(I-Q)

IM3

input carrier frequency at LNA input

input level at LNA input

−30

−

130

MHz

dBmV

deg

−

phase error between I and Q channels

gain error between I and Q channels

crosstalk between I and Q channels

±3

±1

−30

−

dBc

3rd-order intermodulation distortion in

I and Q channels (0 dBmV at LNA_IN)

−

−45

V_o

voltage output on pin I_OUT and Q_OUT

step at output

−

dBmV

kHz

f_step

f_xtal

T_amb

250

crystal frequency

−

MHz

°C

operating ambient temperature

−

ORDERING INFORMATION

PACKAGE

DESCRIPTION

TYPE NUMBER

NAME

VERSION

TDA8751T

SO32

plastic small outline package; 32 leads; body width 7.5 mm

SOT287-1

1999 Aug 20

123 4 5 6 7...24

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