TDA8041H Datasheet, PDF (2/16 Pages) NXP Semiconductors – Quadrature demodulator controller

Philips Semiconductors
Quadrature demodulator controller
Preliminary specification
TDA8041H
FEATURES
• Generates all control signals for Quadrature Phase-Shift
Keying (QPSK) and Binary Phase-Shift Keying (BPSK)
demodulation
• Can be used in applications with low E_b/N_o and high
symbol rate (up to 30 × 10⁶ symbols/s)
• Digital I and Q outputs (3 bits) for soft decision within
error correction
• Two matched analog-to-digital converters to quantize
the I and Q signals
• A digital detector for each control loop to generate the
required control signals
• Digital-to-analog converters and operational amplifiers
to allow high flexibility for loop time constants
• Special input stage to interface with the voltage
controlled crystal oscillator
• Positive 5 V supply voltage.
APPLICATIONS
• Demodulation of BPSK and QPSK modulated signals in
satellite and telephone applications.
QUICK REFERENCE DATA
SYMBOL
V_DD(A)
V_DDA(C)
V_DD(I/O)
V_DDD
V_DD(C)
I_DD(tot)
V_IQ
R_sym
I_O(DAC)
PARAMETER
CONDITIONS
supply voltage for operational
amplifiers (pin 5)
analog supply voltage for
converters (pin 20)
supply voltage for digital
inputs/outputs (pin 30)
supply voltage for digital
section (pin 35)
supply voltage for digital part
of ADC and DAC (pin 42)
total supply current
I and Q input voltage
V_DD = 5 V
symbol rate
DAC output current
MIN.
4.75
TYP.
5.0
MAX.
UNIT
5.25
V
4.75
5.0
5.25
V
4.75
5.0
5.25
V
4.75
5.0
5.25
V
4.75
5.0
5.25
V
−
30
−
1.0
−
−
−100
−
−
−
30 × 10⁶
+100
mA
V
symbols/s
mA
ORDERING INFORMATION
TYPE NUMBER
TDA8041H
NAME
QFP44⁽¹⁾
PACKAGE
DESCRIPTION
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10 × 10 × 1.75 mm; high stand-off height
VERSION
SOT307-2
Note
1. When using reflow soldering it is recommended that the Drypack instructions in the “Quality Reference Handbook”
(order number 9398 510 63011) are followed.
November 1994
2