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TDA8040T

NXP
Part Number TDA8040T
Manufacturer NXP
Description Quadrature demodulator
Published Apr 16, 2005
Detailed Description INTEGRATED CIRCUITS DATA SHEET TDA8040T Quadrature demodulator Objective specification Supersedes data of 1995 Feb 07 F...
Datasheet PDF File TDA8040T PDF File

TDA8040T
TDA8040T

Overview
INTEGRATED CIRCUITS DATA SHEET TDA8040T Quadrature demodulator Objective specification Supersedes data of 1995 Feb 07 File under Integrated Circuits, IC02 1996 Oct 08 Philips Semiconductors Objective specification Quadrature demodulator FEATURES • +5 V supply voltage • Bandgap internal reference voltage • Low crosstalk between I (in-phase) and Q (quadrature) channel outputs • High operating input sensitivity • High Carrier-to-Noise Ratio (CNR) of the VCO.
APPLICATIONS • Quadrature Phase Shift Keying (QPSK) demodulation.
GENERAL DESCRIPTION The TDA8040T is a monolitic bipolar IC dedicated for quadrature demodulation.
QUICK REFERENCE DATA SYMBOL VCC ICC(tot) Vi(RF) fi(RF) VolQ(p-p) Eφ(IQ) EG(IQ) EG(tilt) αct(IQ) IM3 PARAMETER supply voltage total supply current operating input voltage level RF input signal frequency I and Q output voltage (peak-to-peak value) phase error between the I and Q channels gain error between the I and Q channels gain tilt error in the I and Q channels crosstalk between the I and Q channels intermodulation distortion in the I and Q channels VCC = 5 V CONDITIONS MIN.
4.
5 70 64 10.
7 − − − − 30 40 TYP.
5.
0 79 67 − 0.
5 − − − − − TDA8040T It has been designed to operate in conjunction with the TDA8041H to provide a complete QPSK demodulator.
The design of this circuit has been optimized to provide the best quadrature accuracy necessary for digital receiver applications and particularly for digital television.
The TDA8040T includes two matched mixers, an RF amplifier, a symmetrical Voltage Controlled Oscillator (VCO), a frequency divider and two matched amplifiers.
Two external filters are required for the baseband filtering.
The VCO requires an external LC tank circuit with two varicap diodes.
This oscillator operates at twice the IF carrier frequency and can be used in a carrier recovery AFC loop.
MAX.
5.
5 90 70 150 − 3 1 1 − − V UNIT mA dBµV MHz V deg dB dB dB dB ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA8040T SO16 DESCRIPTION plas...


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