TDA6508 Datasheet, PDF (4/42 Pages) NXP Semiconductors – 3-band mixer/oscillator and PLL for terrestrial tuners

Philips Semiconductors
3-band mixer/oscillator and PLL for
terrestrial tuners
Product specification
TDA6508; TDA6508A;
TDA6509; TDA6509A
loop filter between pin CP and pin VTUNE as shown in
Fig.27. The tuning amplifier can supply up to 33 V (max.)
at pin VT for controlling any of the internal oscillators via
external tank circuits. The phase comparator can operate
at 62.5, 50 or 31.25 kHz with a 4 MHz crystal, depending
on the reference divider ratio of either 64, 80 or 128; see
Table 4. An externally sourced signal having a frequency
between 3.58 MHz and 4.43 MHz can be used as a
reference frequency for the internal crystal oscillator at any
of the reference divider ratios.
In test mode, port P3 will output either half the crystal
reference frequency (¹â„₂f_ref) or half the reference divider
frequency (¹â„₂f_div); see Table 5.
The device can be controlled according to the I²C-bus
format; see Table 1. The in-lock flag bit FL is set to logic 1
when the PLL is locked. This flag is read from the status
byte on pin SDA during a READ operation; see Table 6
and Table 7.
Automatic frequency control is provided using an internal
Analog-to-Digital Converter controlled by the voltage on
pin ADC. The ADC code is read during a READ operation;
see Table 8.
The device requires to be addressed by five sequential
serial bytes (including the address byte) via the I²C-bus to
set the crystal oscillator frequency, program the five ports
and to set the charge-pump current; see Table 1. The
address byte can have one of four possible device
addresses which are selected by applying a specific
voltage to pin AS; see Table 3.
4 QUICK REFERENCE DATA
Measured over full voltage and temperature ranges.
SYMBOL
V_CC
I_CC
f_xtal
P_tot
T_stg
T_amb
PARAMETER
supply voltage
supply current
crystal oscillator frequency
total power dissipation
IC storage temperature
ambient temperature
CONDITIONS
V_CC = 5 V; all ports off
R_xtal = 25 Ω to 300 Ω
MIN.
4.5
43
3.58
−
−40
−20
TYP.
5
58
4.0
290
−
−
MAX.
5.5
74
4.43
385
+150
+85
UNIT
V
mA
MHz
mW
°C
°C
5 ORDERING INFORMATION
TYPE
NUMBER
TDA6508TT
TDA6508ATT
TDA6509TT
TDA6509ATT
TDA6509HN
TDA6509AHN
NAME
TSSOP32
TSSOP32
HVQFN32
PACKAGE
DESCRIPTION
plastic thin shrink small outline package; 32 leads body width 6.1 mm
plastic thin shrink small outline package; 32 leads body width 6.1 mm
plastic thermal enhanced very thin quad flat package; no leads;
32 terminals; body 5 × 5 × 0.85 mm
VERSION
SOT487-1
SOT487-1
SOT617-1
2005 Mar 25
4