Philips TDA5051AT, TDA5051 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA5051A

Home automation modem

Product specification
Supersedes data of 1997 Sep 19
File under Integrated Circuits, IC11

1999 May 31

Philips Semiconductors Product specification

Home automation modem TDA5051A

FEATURES

• Full digital carrier generation and shaping

• Modulation/demodulation frequency set by clock

adjustment, from microcontroller or on-chip oscillator

• High clock rate of 6-bit A/D (Digital to Analog) converter
for rejection of aliasing components

APPLICATIONS

• Home appliance control (air conditioning, shutters,
lighting, alarms and so on)

• Energy/heating control

• Amplitude Shift Keying (ASK) data transmission using

the home power network.

• Fully integrated output power stage with overload
protection

• Automatic Gain Control (AGC) at receiver input

• 8-bit A/D (Analog to Analog) converter and narrow

digital filtering

• Digital demodulation delivering baseband data

GENERAL DESCRIPTION

The TDA5051A is a modem IC, specifically dedicated to
ASK transmission by means of the home power supply
network, at 600 or 1200 baud data rate. It operates from a
single 5 V supply.

• Easy compliance with EN50065-1 with simple coupling
network

• Few external components for low cost applications

• SO16 plastic package.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

DD

I

DD(tot)

supply voltage 4.75 5.0 5.25 V
total supply current f

= 8.48 MHz

osc

reception mode − 28 38 mA
transmission mode (

DATAIN=0) ZL=30Ω−47 68 mA

power-down mode − 19 25 mA

f

cr

f

osc

V

o(rms)

carrier frequency note 1 95 132.5 148.5 kHz
oscillator frequency 6.08 8.48 9.504 MHz
output carrier signal on CISPR16 load

120 − 122 dBµV

(RMS value)

V

i(rms)

THD total harmonic distortion on CISPR16

input signal (RMS value) note 2 82 − 122 dBµV

−−55 − dB

load with coupling network

Z

L

load impedance 1 30 −Ω
BR baud rate − 600 1200 bits/s
T

amb

ambient temperature 0 − 70 °C

Notes

1. Frequency range corresponding to the EN50065-1 band. However, the modem can operate at any lower oscillator
frequency.

2. The minimum value can be improved by using an external amplifier, see application diagrams Figs 22 and 23.

1999 May 31 2

Philips Semiconductors Product specification

Home automation modem TDA5051A

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA5051AT SO16 plastic small outline package; 16 leads; body width 7.5 mm SOT162-1

BLOCK DIAGRAM

handbook, full pagewidth

DATA

IN

CLK

OUT

DGND

1

4

AGND12V

5

CONTROL LOGIC

ROM

10

DDA

13

V

DDD

311

modulated

6

DAC clock

D/A

filter clock

carrier

V

DDAP

POWER

DRIVE

WITH

PROTECTION

TDA5051A

10

9

15

TX

OUT

APGND

PD

7

OSCILLATOR

8

2

DIGITAL

DEMODULATOR

16

TEST1 SCANTEST

2

÷

DIGITAL

BAND-PASS

FILTER

DETECT

6

DATA

OSC1

OSC2

OUT

Fig.1 Block diagram.

1999 May 31 3

PEAK

14

A/D

8

H

L

U
D

COUNT

5

U/D

MGK832

RX

IN

Philips Semiconductors Product specification

Home automation modem TDA5051A

PINNING

SYMBOL PIN DESCRIPTION

DATA

IN

DATA

OUT

V

DDD

CLK

OUT

DGND 5 digital ground
SCANTEST 6 test input (LOW in application)
OSC1 7 oscillator input
OSC2 8 oscillator output
APGND 9 analog ground for power amplifier
TX

OUT

V

DDAP

AGND 12 analog ground
V

DDA

RX

IN

PD 15 power-down input (active HIGH)
TEST1 16 test input (HIGH in application)

1 digital data input (active LOW)
2 digital data output (active LOW)
3 digital supply voltage
4 clock output

10 analog signal output
11 analog supply voltage for power

amplifier

13 analog supply voltage
14 analog signal input

handbook, halfpage

DATA

SCANTEST

DATA

CLK

OUT

V

DDD
OUT

DGND

OSC1
OSC2

IN

1
2
3
4

TDA5051AT

5
6
7
8

Fig.2 Pin configuration.

MGK833

16
15
14
13
12
11
10

9

TEST1
PD
RX

IN

V

DDA

AGND
V

DDAP

TX

OUT

APGND

FUNCTIONAL DESCRIPTION

Both transmission and reception stages are controlled
either by the master clock of the microcontroller or by the
on-chip reference oscillator connected to a crystal. This
ensures the accuracy of the transmission carrier and the
exact trimming of the digital filter, thus making the
performance totally independent of application
disturbances such as component spread, temperature,
supply drift and so on.

The interface with the power network is made by means of
an LC network (see Fig.18). The device includes a power
output stage that feeds a 120 dBµV (RMS) signal on a
typical 30 Ω load.

To reduce power consumption, the IC is disabled by a
power-down input (pin PD): in this mode, the on-chip
oscillator remains active and the clock continues to be
supplied at pin CLK

. For low-power operation in

OUT

reception mode, this pin can be dynamically controlled by
the microcontroller, see Section “Power-down mode”.

When the circuit is connected to an external clock
generator (see Fig.6), the clock signal must be applied at
pin OSC1 (pin 7); OSC2 (pin 8) must be left open-circuit.
Fig.7 shows the use of the on-chip clock circuit.

All logic inputs and outputs are compatible with
TTL/CMOS levels, providing an easy connection to a
standard microcontroller I/O port.

The digital part of the IC is fully scan-testable. Two digital
inputs, SCANTEST and TEST1, are used for production
test: these pins must be left open-circuit in functional mode
(correct levels are internally defined by pull-up or
pull-down resistors).

Transmission mode

To provide strict stability with respect to environmental
conditions, the carrier frequency is generated by scanning
the ROM memory under the control of the microcontroller
clock or the reference frequency provided by the on-chip
oscillator. High frequency clocking rejects the aliasing
components to such an extent that they are filtered by the
coupling LC network and do not cause any significant
disturbance. The data modulation is applied through
pin DATAIN and smoothly applied by specific digital circuits
to the carrier (shaping). Harmonic components are limited
in this process, thus avoiding unacceptable disturbance of
the transmission channel (according to CISPR16 and
EN50065-1 recommendations). A −55 dB Total Harmonic
Distortion (TDH) is reached when the typical LC coupling
network (or an equivalent filter) is used.

1999 May 31 4

Philips Semiconductors Product specification

Home automation modem TDA5051A

The DAC and the power stage are set in order to provide
a maximum signal level of 122 dBµV (RMS) at the output.

The output of the power stage (TX

) must always be

OUT

connected to a decoupling capacitor, because of a DC
level of 0.5VDD at this pin, which is present even when the
device is not transmitting. This pin must also be protected
against overvoltage and negative transient signals.
The DC level of TX

can be used to bias a unipolar

OUT

transient suppressor, as shown in the application diagram;
see Fig.18.

Direct connection to the mains is done through an LC
network for low-cost applications. However, a HF signal
transformer could be used when power-line insulation has
to be performed.

CAUTION

In transmission mode, the receiving part of the circuit is
not disabled and the detection of the transmitted signal
is normally performed. In this mode, the gain chosen
before the beginning of the transmission is stored, and
the AGC is internally set to −6dB as long as DATA

IN

is LOW. Then, the old gain setting is automatically

restored.

Reception mode

After digital demodulation, the baseband data signal is
made available after pulse shaping.

The signal pin (RXIN) is a high-impedance input which has
to be protected and DC decoupled for the same reasons
as with pin TX

. The high sensitivity (82 dBµV) of this

OUT

input requires an efficient 50 Hz rejection filter (realized by
the LC coupling network), which also acts as an
anti-aliasing filter for the internal digital processing;
see Fig.18.

Data format

T

RANSMISSION MODE

The data input (DATAIN) is active LOW: this means that a
burst is generated on the line (pin TX

) when DATA

OUT

IN

pin is LOW.
Pin TX

is in a high-impedance state as long as the

OUT

device is not transmitting. Successive logic 1s are treated
in a Non-Return-to-Zero (NRZ) mode, see pulse shapes in
Figs 8 and 9.

R

ECEPTION MODE

The data output (pin DATA

) is active LOW; this means

OUT

that the data output is LOW when a burst is received.
Pin DATA

remains LOW as long as a burst is received.

OUT

The input signal received by the modem is applied to a
wide range input amplifier with AGC (−6 to +30 dB). This is
basically for noise performance improvement and signal
level adjustment, which ensures a maximum sensitivity of
the ADC. An 8-bit conversion is then performed, followed

Power-down mode

Power-down input (pin PD) is active HIGH; this means that
the power consumption is minimum when pin PD is HIGH.
Now, all functions are disabled, except clock generation.

by digital band-pass filtering, to meet the CISPR
normalization and to comply with some additional
limitations met in current applications.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER MIN. MAX. UNIT

V
f
T
T
T

DD

osc

stg
amb
j

supply voltage 4.5 5.5 V
oscillator frequency − 12 MHz
storage temperature −50 +150 °C
ambient temperature −10 +80 °C
junction temperature − 125 °C

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.

1999 May 31 5

Philips Semiconductors Product specification

Home automation modem TDA5051A

CHARACTERISTICS

V

DDD=VDDA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

DD

I

DD(RX/TX)(tot)

I

DD(PD)(tot)

I

DD(PAMP)

I

DD(PAMP)(max)

=5V±5%; T

= 0 to 70 °C; V

amb

connected to V

DDD

; DGND connected to AGND.

DDA

supply voltage 4.75 5 5.25 V
total analog + digital

supply current
total analog + digital

supply current;

VDD=5V±5%
TX or RX mode

VDD=5V±5%;
PD = HIGH

− 28 38 mA

− 19 25 mA

Power-down mode

power amplifier supply
current

VDD=5V±5%;
ZL=30Ω;

− 19 30 mA

DATAIN= LOW
in transmission mode

maximum power amplifier
supply current

VDD=5V±5%;
ZL=1Ω;

− 76 − mA

DATAIN= LOW
in transmission mode

DATAIN and PD inputs: DATA

V

IH

V

IL

V

OH

V

OL

HIGH-level input voltage 0.2VDD+ 0.9 − VDD+ 0.5 V
LOW-level input voltage −0.5 − 0.2VDD− 0.1 V
HIGH-level output voltage IOH= −1.6 mA 2.4 −− V
LOW-level output voltage IOL= 1.6 mA −−0.45 V

and CLK

OUT

OUT

outputs

OSC1 input and OSC2 output (OSC2 only used for driving external quartz crystal; must be left open-circuit
when using an external clock generator)

V

IH

V

IL

V

OH

V

OL

HIGH-level input voltage 0.7V

DD

− VDD+ 0.5 V
LOW-level input voltage −0.5 − 0.2VDD− 0.1 V
HIGH-level output voltage IOH= −1.6 mA 2.4 −− V
LOW-level output voltage IOL= 1.6 mA −−0.45 V

Clock

f

osc

f

osc

-------­f

cr

f

osc

---------------------

f

CLKOUT

oscillator frequency 6.080 − 9.504 MHz
ratio between oscillator

− 64 −

and carrier frequency

ratio between oscillator

− 2 −

and clock output frequency

Transmission mode

f

cr

t

su

t

h

carrier frequency f
set-up time of the shaped

burst
hold time of the shaped

burst

= 8.48 MHz − 132.5 − kHz

osc

f

= 8.48 MHz;

osc

− 170 −µs

see Fig.8
f

= 8.48 MHz;

osc

− 170 −µs

see Fig.8

1999 May 31 6

Philips Semiconductors Product specification

Home automation modem TDA5051A

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

t

W(DI)(min)

V

o(rms)

I

o(max)

Z

o

V

O

THD total harmonic distortion on

B

−20dB

minimum pulse width of
DATAIN signal

output carrier signal
(RMS value)

power amplifier maximum
output current (peak value)

output impedance of the
power amplifier

output DC level at
pin TX

OUT

CISPR16 load with the
coupling network
(measured on the first ten
harmonics)

bandwidth of the shaped
output signal (at −20 dB)
on CISPR16 load with the
coupling network

f

= 8.48 MHz;

osc

see Fig.8
ZL= CISPR16;

DATAIN= LOW
ZL=1Ω;

DATAIN= LOW

V

= 121 dBµV on

o(rms)

CISPR16 load;
f

= 8.48 MHz;

osc

DATAIN= LOW
(no modulation);
see Figs 3 and 16

V

= 121 dBµV on

o(rms)

CISPR16 load;
f

= 8.48 MHz;

osc

DATAIN= 300 Hz;
duty factor = 50%;
see Fig.4

− 190 −µs

120 − 122 dBµV

− 160 − mA

− 5 −Ω

− 2.5 − V

−−55 − dB

− 3000 − Hz

Reception mode

V

i(rms)

analog input signal
(RMS value)

V

I

Z

i

R

AGC

t

c(AGC)

t

d(dem)(su)

DC level at pin RX

IN

RXIN input impedance − 50 − kΩ
AGC range − 36 − dB
AGC time constant f

demodulation delay set-up
time

t

d(dem)(h)

demodulation delay hold
time

B

det

detection bandwidth f

BER bit error rate f

82 − 122 dBµV

− 2.5 − V

= 8.48 MHz;

osc

− 296 −µs

see Fig.5
f

= 8.48 MHz;

osc

− 350 400 µs

see Fig.15
f

= 8.48 MHz;

osc

− 420 470 µs

see Fig.15

= 8.48 MHz − 3 − kHz

osc

= 8.48 MHz;

osc

− 1 − 1 × 10
600 baud; S/N = 35 dB;
signal 76 dBµV;
see Fig.17

−4

1999 May 31 7

Philips Semiconductors Product specification

Home automation modem TDA5051A

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Power-up timing

t

d(pu)(TX)

delay between power-up
and DATAIN in
transmission mode

t

d(pu)(RX)

delay between power-up
and DATA
mode

Power-down timing

t

d(pd)(TX)

delay between PD = 0 and
DA TAIN in transmission
mode

t

d(pd)(RX)

delay between PD = 0 and
DA TA
mode

t

active(min)

minimum active time with
T = 10 ms power-down
period in reception mode

OUT

in reception

OUT

in reception

XTAL = 8.48 MHz;
C1 = C2 = 27 pF;
Rp= 2.2 MΩ; see Fig.10

XTAL = 8.48 MHz;
C1 = C2 = 27 pF;
Rp= 2.2 MΩ;
f

= 132.5 kHz;

RXIN

120 dBµV sine wave;
see Fig.11

f

= 8.48 MHz;

osc

see Fig.12

f

= 8.48 MHz;

osc

f

= 132.5 kHz;

RXIN

120 dBµV sine wave;
see Fig.13

f

= 8.48 MHz;

osc

f

= 132.5 kHz;

RXIN

120 dBµV sine wave;
see Fig.14

− 1 −µs

− 1 −µs

− 10 −µs

− 500 −µs

− 1 −µs

book, full pagewidth

0

V

o(rms)

(dBV)

−100

5

10

Resolution bandwidth =9 kHz; top: 0 dBV (RMS) = 120 dBµV (RMS); marker at −5 dBV (RMS) = 115 dBµV (RMS);
the CISPR16 network provides an attenuation of 6 dB, so the signal amplitude is 121 dBµV (RMS).

132.5 kHz

Fig.3 Carrier spectrum.

f (Hz)

MGK834

6

10

1999 May 31 8

Philips Semiconductors Product specification

Home automation modem TDA5051A

handbook, full pagewidth

−10

dBV

(RMS)

−60

117.5 132.5

Resolution bandwidth = 100 Hz; B

= 3000 Hz (2 × 1500 Hz).

−20dB

1500 Hz

20 dB

Fig.4 Shaped signal spectrum.

f (kHz)

MBH664

147.5

handbook, full pagewidth

V

RXIN

V

G

AGC

+30 dB

−6 dB

(I)

0

(AGC time constant)

modulated sine wave 122 dBµV amplitude

t

c(AGC)

Fig.5 AGC time constant definition (not to scale).

1999 May 31 9

t

8.68 dB
AGC range

MGK011