INTEGRATED CIRCUITS
DATA SHEET
TDA6502; TDA6502A; TDA6503;
TDA6503A
5 V mixers/oscillators and
synthesizers for cable TV and VCR
2-band tuners
Product specification
Supersedes data of 2000 Aug 02
File under Integrated Circuits, IC02
2001 Aug 22
Philips Semiconductors
Product specification
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
CONTENTS
1
2
3
3.1
3.2
4
5
6
7
8
8.1
8.2
8.2.1
8.2.2
8.2.3
8.2.4
8.3
8.3.1
9
10
11
12
13
13.1
13.2
13.3
13.4
13.5
13.5.1
13.5.2
13.6
13.6.1
13.6.2
13.6.3
FEATURES
APPLICATIONS
GENERAL DESCRIPTION
I
2
C-bus format
3-wire bus format
QUICK REFERENCE DATA
ORDERING INFORMATION
BLOCK DIAGRAM
PINNING
FUNCTIONAL DESCRIPTION
Control mode selection
I
2
C-bus data format: pin SW to ground
I
2
C-bus address selection
Write mode
Read mode
Power-on reset
3-wire bus data format: pin SW to V
CC
or
open-circuit
Power-on reset
LIMITING VALUES
THERMAL CHARACTERISTICS
CHARACTERISTICS
TIMING CHARACTERISTICS
TEST AND APPLICATION INFORMATION
Test circuits
Measurement circuit
Tuning amplifier
Crystal oscillator
Examples of I
2
C-bus data format sequences for
TDA6502 and TDA6503
Write sequences to register C2
Read sequences from register C3
Examples of 3-wire bus data format sequences
for TDA6502 and TDA6503
18-bit sequence
19-bit sequence
27-bit sequence
14
15
16
16.1
16.2
16.3
16.4
16.5
17
18
19
20
TDA6502; TDA6502A;
TDA6503; TDA6503A
INTERNAL PIN CONFIGURATION
PACKAGE OUTLINE
SOLDERING
Introduction to soldering surface mount
packages
Reflow soldering
Wave soldering
Manual soldering
Suitability of surface mount IC packages for
wave and reflow soldering methods
DATA SHEET STATUS
DEFINITIONS
DISCLAIMERS
PURCHASE OF PHILIPS I
2
C COMPONENTS
2001 Aug 22
2
Philips Semiconductors
Product specification
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
1
FEATURES
TDA6502; TDA6502A;
TDA6503; TDA6503A
•
Single-chip 5 V mixer/oscillator and synthesizer for
cable TV and VCR tuners
•
Pin-to-pin compatible with TDA6402, TDA6402A,
TDA6403 and TDA6403A
•
Universal bus protocol (I
2
C-bus or 3-wire bus):
– Bus protocol for 18 or 19-bit transmission (3-wire
bus)
– Extra protocol for 27-bit transmission (test modes and
features for 3-wire bus)
– Address + 4 data bytes transmission (I
2
C-bus ‘write’
mode)
– Address + 1 status byte (I
2
C-bus ‘read’ mode)
– 4 independent I
2
C-bus addresses.
•
1 PMOS buffer for UHF band selection (25 mA)
•
3 PMOS buffers for general purpose, e.g. 2 VHF
sub-bands, FM sound trap (25 mA)
•
33 V tuning voltage output
•
In-lock detector
•
5-step analog-to-digital converter (3 bits in I
2
C-bus
mode)
•
15-bit programmable divider
•
Programmable reference divider ratio (64, 80 or 128)
•
Programmable charge pump current (60 or 280
µA)
•
Varicap drive disable
•
Balanced mixer with a common emitter input for VHF
(single input)
•
Balanced mixer with a common base input for UHF
(balanced input)
•
2-pin common emitter oscillator for VHF
•
4-pin common emitter oscillator for UHF
•
IF preamplifier with asymmetrical 75
Ω
output
impedance able to drive loads from 75
Ω
upwards
•
Low power
•
Low radiation
•
Small size
•
The TDA6502A and TDA6503A differ from the TDA6502
and TDA6503 by the UHF port protocol in the I
2
C-bus
mode (see Tables 3 and 4).
2
APPLICATIONS
•
Cable tuners for TV and VCR (switched concept for
VHF).
3
GENERAL DESCRIPTION
The TDA6502, TDA6502A, TDA6503 and TDA6503A are
programmable 2-band mixers/oscillators and synthesizers
intended for VHF/UHF TV and VCR tuners (see Fig.1).
Partitioning of the bands is up to the customer as long as
VHF is below 500 MHz and UHF is below 900 MHz.
The devices include two double balanced mixers and two
oscillators for the VHF and UHF band respectively, an
IF amplifier and a PLL synthesizer. The VHF band can be
split-up into two sub-bands using a proper oscillator
application and a switchable inductor.
Two pins are available between the mixer output and the
IF amplifier input to enable IF filtering for improved signal
handling.
The port register provides four PMOS ports. Band
selection is provided by port register UHF. When port
register UHF is ‘on’, the UHF mixer-oscillator is active and
the VHF band is switched off. When port register UHF is
‘off’, the VHF mixer-oscillator is active and the UHF band
is off. Port registers VHFL and VHFH are used to select
the VHF sub-bands. Port register FMST is a general
purpose port, that can be used to switch an FM sound trap.
When the ports are used, the sum of the drain currents has
to be limited to 30 mA.
The synthesizer consists of a 15-bit programmable divider,
a crystal oscillator and its programmable reference divider
and a phase comparator (phase/frequency detector)
combined with a charge pump which drives the tuning
amplifier, including the 33 V output at pin VT. Depending
on the reference divider ratio (64, 80 or 128), the phase
comparator operates at 62.5, 50 or 31.25 kHz with a
4 MHz crystal.
2001 Aug 22
3
Philips Semiconductors
Product specification
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
Depending on the voltage applied to pin SW (see Table 2)
the device is operating in the I
2
C-bus mode or 3-wire bus
mode.
In the 3-wire bus mode, pin LOCK/ADC is the ‘lock’ output
of the PLL and is at LOW level when the PLL is locked.
Lock detector bit FL of the status byte is set to logic 1 when
the loop is locked and is read on the SDA line during a
READ operation in I
2
C-bus mode only.
In the I
2
C-bus mode only, pin LOCK/ADC is the ADC input
for digital AFC control. The ADC code is read during a
READ operation on the I
2
C-bus.
In the test mode, in both I
2
C-bus mode and 3-wire bus
mode, pin LOCK/ADC is used as a test output for f
REF
and
1
⁄
f
2 DIV
.
3.1
I
2
C-bus format
3.2
TDA6502; TDA6502A;
TDA6503; TDA6503A
3-wire bus format
Data is transmitted to the device during a HIGH level on
pin CE/AS (enable line). The device is accessible with
18-bit and 19-bit data formats (see Figs 4 and 5). The first
four bits are used to program the PMOS ports and the
remaining bits control the programmable divider. A 27-bit
data format (see Fig.6) may also be used to set the charge
pump current, the reference divider ratio and the test
modes.
It is not allowed to address the device with words whose
length is different from 18, 19 or 27 bits.
Table 1
Data word length for 3-wire bus format
REFERENCE
DIVIDER
(1)
64
128
programmable
FREQUENCY
STEP
62.50 kHz
31.25 kHz
programmable
DATA WORD
18-bit
19-bit
27-bit
Note
Five serial bytes (including the address byte) are required
to address the device, select the VCO frequency, program
the four ports, set the charge pump current and set the
reference divider ratio. The device has four independent
I
2
C-bus addresses which can be selected by applying a
specific voltage to pin CE/AS.
1. The selection of the reference divider is given by an
automatic identification of the data word length. When
the 27-bit format is used, the reference divider is
controlled by bits RSA and RSB (see Table 8). More
details are given in Section 8.3.
2001 Aug 22
4
Philips Semiconductors
Product specification
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
4 QUICK REFERENCE DATA
Measured over full voltage and temperature ranges.
SYMBOL
V
CC
I
CC
f
XTAL
I
o(PMOS)
P
tot
T
stg
T
amb
f
RF
G
V
NF
V
o
PARAMETER
supply voltage
supply current
crystal oscillator frequency
PMOS port output current
total power dissipation
IC storage temperature
ambient temperature
RF frequency
voltage gain
noise figure
output voltage (causing 1% cross
modulation in channel)
VHF band
UHF band
VHF band
UHF band
VHF band
UHF band
VHF band
UHF band
note 1
note 2
CONDITIONS
operating
all PMOS ports are off;
V
CC
= 5V
TDA6502; TDA6502A;
TDA6503; TDA6503A
MIN.
4.5
−
−
−
−
−40
−20
40
200
−
−
−
−
−
−
TYP.
5
71
4.0
−
−
−
−
−
−
20
32
7.5
7
110
110
MAX.
5.5
−
−
30
520
+150
+85
800
900
−
−
−
−
−
−
UNIT
V
mA
MHz
mA
mW
°C
°C
MHz
MHz
dB
dB
dB
dB
dBµV
dBµV
Notes
1. One buffer ‘on’, I
o
= 25 mA; two buffers ‘on’, maximum sum of I
o
= 30 mA.
2. The power dissipation is calculated as follows:
(
0.5
×
33V
)
P
tot
=
V
CC
× (
I
CC
–
I
o
)
+
V
P(sat)
×
I
o
+
--------------------------------
-
22 kΩ
where:
V
P(sat)
= output saturation voltage on the buffer output
I
o
= source current for one buffer output.
5
ORDERING INFORMATION
TYPE
NUMBER
TDA6502
TDA6502A
TDA6503
TDA6503A
PACKAGE
NAME
SSOP28
DESCRIPTION
plastic shrink small outline package; 28 leads; body width 5.3 mm
VERSION
SOT341-1
2
2001 Aug 22
5
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