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TDA8040T

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.Application· Quadrature Phase Shift Keying (QPSK) demodulation.PinoutSpecificat...

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SeekIC No. : 004516661 Detail

TDA8040T: 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 Ra...

TDA8040T Data Sheet

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Part Number:
TDA8040T
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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.


Application

· Quadrature Phase Shift Keying (QPSK) demodulation.


Pinout

Connection Diagram


Specifications

SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VCC(A)
 supply voltage for I and Q amplifiers
-0.3
+6.0
V
VCC(D)
 supply voltage for demodulator
-0.3
+6.0
V
VCC(V)
 supply voltage for VCO
-0.3
+6.0
V
Vn(max)
 maximum voltage on all pins
-0.3
VCC
V
Imax
 maximum sink or source current
-
10
mA
tsc(max)
 maximum short-circuit time on outputs
-
10
s
ZL(IQ)
 AC load impedance for
I and Q channels
fi = 15 MHz
35
-
ZLA(IQ)
 AC load impedance for
I and Q output amplifiers
fi = 15 MHz
300
-
VVCO(p-p)
 voltage drive level for external oscillator
signal (peak-to-peak value)
-
0.6
V
Ptot
 total power dissipation
Tamb = 70
-
500
mW
Tstg
 storage temperature
-55
+150
Tj
 junction temperature
-
150
Tamb
 operating ambient temperature
0
70
HANDLING
Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling MOS devices.


Description

The TDA8040T is a monolitic bipolar IC dedicated for quadrature demodulation.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.




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