Preliminary specification
File under Integrated Circuits, IC01
1997 Aug 12
Page 2
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
FEATURES
• Low cost single-chip FSK receiver
• Superheterodyne architecture with high integration level
• Few external low cost components
• Wide supply voltage range
• Low power consumption
• Wide frequency range, 150 to 450 MHz
• High sensitivity
• IF band determined by application
• High selectivity
• Very low spurious radiation, −60 dBm
(meets FTZ 17TR2100)
• Automotive temperature range
• Power-down mode
• SSOP20 package.
Applications
• Keyless entry systems
• Car alarm systems
• Remote control systems
• Security systems
• Telemetry systems
• Wireless data transmission
• Domestic appliances.
GENERAL DESCRIPTION
The UAA3202M is a fully integrated single-chip receiver,
primarily intended for use in VHF and UHF systems
employing direct Frequency Shift Keying (FSK)
modulation. The UAA3202M incorporates a SAW
stabilized local oscillator, balanced mixer, IF amplifier,
limiter, Received Signal Strength Indicator (RSSI), RSSI
comparator, FSK demodulator, data filter and data slicer.
The device features a power-down mode in order to
minimize the average receiver supply current.
QUICK REFERENCE DATA
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
V
CC
I
CC
P
sens
supply voltage3.5−6V
supply current for
operating mode onV
operating mode offV
sensitivityfi= 433.92 MHz;
=0V; R2= 560 Ω2.03.44.7mA
PWD
PWD=VCC
−330µA
−−−94dBm
f
= 250 Hz square wave;
mod
∆f=±25 kHz; BER ≤ 3%
T
amb
operating ambient temperature−40−+85°C
ORDERING INFORMATION
TYPE
NUMBER
NAMEDESCRIPTIONVERSION
UAA3202MSSOP20
plastic shrink small outline package; 20 leads; body width 5.3 mm
PACKAGE
SOT339-1
1997 Aug 122
Page 3
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
BLOCK DIAGRAM
MHA797
150 kΩ
BIAS
ref
V
150 kΩ
BUFFER
UAA3202M
EM MXINLINRSSIDMODLFBCPCPWDDATA
V
FA
30 kΩ
COMPCPB CPA
SHIFT
PHASE
PHASE
DETECTOR
ref
V
RSSI
EE
V
Fig.1 Block diagram.
EO
LIMITER
AMPLIFIER
50 kΩ
CC
V
MIXER
IF
1.4 kΩ
2019 1817161514131211
AMP
1.5 kΩ
1.5 kΩ
OSCILLATOR
OSC OSEV
CC
1234 56789 10
MON MOPV
handbook, full pagewidth
1997 Aug 123
Page 4
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
PINNING
SYMBOLPINDESCRIPTION
MON1negative mixer output
MOP2positive mixer output
V
CC
3positive supply voltage
OSC4oscillator collector
OSE5oscillator emitter
V
EO
V
EE
6negative supply voltage for oscillator
7negative supply voltage
COMP8RSSI comparator output
CPB9comparator input B
CPA10comparator input A
DATA11data output
PWD12power-down control input
CPC13comparator input C
DMOD14demodulator frequency adjustment
RSSI15RSSI current output
LFB16limiter feedback
LIN17limiter input
MXIN18mixer input
V
EM
19negative supply voltage for mixer
FA20IF amplifier output
handbook, halfpage
MON
1
MOP
2
V
3
CC
OSC
4
OSE
5
EO
EE
UAA3202M
6
7
8
9
10
MHA796
V
V
COMP
CPB
CPA
Fig.2 Pin configuration.
20
19
18
17
16
15
14
13
12
11
FA
V
EM
MXIN
LIN
LFB
RSSI
DMOD
CPC
PWD
DATA
1997 Aug 124
Page 5
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
FUNCTIONAL DESCRIPTION
The device is based on the superheterodyne architecture
incorporating a mixer, local oscillator, IF amplifier, limiter,
RSSI, RSSI comparator, FSK demodulator, data filter,
data slicer and power-down circuitry. The device employs
a low IF frequency of typically 1 MHz in order to allow IF
filtering by means of external low cost R, L and C
components. If image rejection is required it can be
achieved by applying a matching external front-end SAW
filter. The device provides a wide IF range of 300 kHz in
order to allow the use of a SAW stabilized oscillator.
The on-chip local oscillator provides the injection signal for
the mixer. Tuning of the on-chip local oscillator is not
necessary. The oscillator frequency is determined by an
external 1-port SAW resonator. The RF input signal is fed
to the mixer and down converted to the IF frequency. After
amplification and filtering the RF signal is applied to a
limiter. The IF filter order and characteristics are
determined by the external low cost R, L and C
components. The limiter amplifier provides a RSSI signal
which can be routed to an on-chip RSSI level comparator
in order to derive a field strength indication for external
use. The limited IF signal is fed to the FSK demodulator.
The demodulator centre frequency is determined by an
external capacitor. No alignment is necessary for the FSK
demodulator. After filtering the demodulated data signal is
fed to a data slicer and is made available at the data
output. The data filter characteristics are determined by
external capacitors. The data slicer employs an adaptive
slice reference in order to track frequency offsets.
The device is switched from power-down to operating
mode and vice versa by means of a control input.
Extremely low supply current is drawn when the device is
in power-down mode. Measures are taken to allow fast
receiver settling when the device is switched from
power-down to operating mode.
Mixer
Post mixer amplifier
The Post Mixer Amplifier (PMA) is a differential input,
single-ended output amplifier. It separates the first and
second IF filters from each other. Amplifier gain is provided
in order to reduce the influence of the limiter noise figure
on the total noise figure.
Limiter
The limiter is a single-ended input multiple stage amplifier
with high total gain. Amplifier stability is achieved by
means of an external DC feedback capacitor, which is also
used to determine the lower limiter cut-off frequency.
An RSSI signal proportional to the limiter input signal is
provided.
IF filters
IF filtering with high selectivity is realized by means of
external low cost R, L and C components. The first IF filter
is located directly following the mixer output. An external
L/C network assembles a band-pass with low sensitivity in
order to meet the bandwidth of an elliptic low-pass filter
external to the device and is located in front of the limiter.
The filter source impedance is determined by the drive
impedance of the IF amplifier. In order to improve the IF
filter selectivity below the pass-band a high-pass
characteristic is added by means of a DC blocking
capacitor in front of the limiter input and by means of the
limiter DC feedback capacitor.
RSSI
The RSSI signal is a current proportional to the limiter input
level (RF input power). By means of an external resistor
the resulting RSSI voltage level is set in order to fit the
application. The RSSI voltage is available to external
circuits and is fed to the input of the RSSI level
comparator. For RSSI filtering an external capacitor is
connected.
The mixer is a single balanced emitter coupled mixer with
internal biasing. Matching of the RF source impedance to
the mixer input requires an external matching network.
Oscillator
The oscillator consists of an on-chip transistor in common
base configuration. An external tank and SAW resonator
determines the oscillator frequency. Oscillator alignment is
not necessary. Oscillator bias is controlled by an external
resistor.
1997 Aug 125
RSSI level comparator
The RSSI level comparator compares the RSSI level with
a fixed and independent internal reference voltage. If the
RSSI level exceeds the internal reference voltage a logic
HIGH signal is generated. The level comparator provides
some hysteresis in order to avoid spurious oscillation.
The output of the level comparator is designed as an
open-collector with internal pull-up.
Page 6
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
FSK demodulator
The limited IF signal is converted into baseband data by
means of a quadrature FM demodulator consisting of an
all-pass filter and a mixer stage. No alignment of the
demodulator is necessary. The demodulator centre
frequency is set by a capacitor external to the device.
The demodulator provides a large audio bandwidth in
order to allow high data rate applications.
The demodulator can detect a small IF frequency deviation
even if a relatively large IF frequency offset is
encountered.
Data filters
After demodulation a two-stage data filtering circuit is
provided in order to suppress unwanted frequency
components. Two R/C low-pass filters with on-chip
resistors are provided which are separated by a buffer
stage.
Data slicer
Data detection is provided by means of a level comparator
with adaptive slice reference. After the first data filter stage
the pre-filtered data is split into two parts. One part passes
the second data filter stage and is fed to the positive
comparator input.
The other path is fed to an integration circuit with a large
time constant in order to derive the average value
(DC component) as an adaptive slice reference which is
presented to the negative comparator input. The adaptive
reference enables the received data over a large range of
demodulator frequency offsets to be detected.
The integration circuit consists of a simple R/C low-pass
filter with on-chip resistor. The level comparator output is
designed as an open-collector with internal pull-up.
Power-down circuitry
The device provides a power-down mode. While in
power-down mode the device disables the majority of the
internal circuits and consumes extremely low current.
Measures are taken to allow fast receiver settling when
normal operation is resumed. Thus circuits with large time
constants are only powered down partly or provide a high
impedance during power-down in order to avoid the
discharge of external capacitors as much as possible.
Power-down mode is entered when the control input is
active HIGH. The control input provides an internal pull-up
resistor of high impedance.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOLPARAMETERCONDITIONSMIN.MAX.UNIT
V
CC
T
amb
T
stg
V
esd
supply voltage−0.3+8.0V
operating ambient temperature−40+85°C
storage temperature−55+125°C
electrostatic handlingnote 1
pins 4 and 5−2000+1500V
pins 18 and 19−1500+2000V
all other pins−2000+2000V
Note
1. Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor.
THERMAL CHARACTERISTICS
SYMBOLPARAMETERVALUEUNIT
R
th j-a
thermal resistance from junction to ambient in free air125K/W
1997 Aug 126
Page 7
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
DC CHARACTERISTICS
V
= 3.5 V; T
CC
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
Supplies
V
CC
I
CC
V
PWD(on)
V
PWD(off)
I
PWD(on)
I
PWD(off)
Oscillator
V
OSC(DC)
Mixer
V
MXIN(DC)
V
MOP(DC)
V
MON(DC)
Post mixer amplifier
V
FA(DC)
Limiter
V
LIN(DC)
V
LFB(DC)
V
RSSI(DC)
Demodulator
V
DMOD(DC)
Data slicer
V
CPC(DC)
V
CPA(DC)
V
CPB(DC)
V
OH(DAT)
V
OL(DAT)
RSSI comparator
V
OH(RSSI)
V
OL(RSSI)
=25°C; for application diagram seeFig.11; unless otherwise specified.
amb
supply voltage3.5−6V
supply current fornote 1
operating mode onV
PWD
=0V;
2.03.44.7mA
R2= 560 Ω
operating mode offV
PWD=VCC
−330µA
PWD voltage for operating mode ON0−300mV
PWD voltage for operating mode OFFVCC− 0.3 −V
PWD current for operating mode ONV
PWD current for operating mode OFFV
=0V−30−10−3µA
PWD
PWD=VCC
−13µA
CC
V
DC operating point pin 43.283.343.40V
DC operating point pin 180.680.780.88V
DC operating point pin 22.782.983.18V
DC operating point pin 12.782.983.18V
DC operating point pin 202.142.272.40V
DC operating point pin 173.453.493.50V
DC operating point pin 162.762.812.86V
DC operating point pin 152.212.362.51V
DC operating point pin 141.631.832.03V
DC operating point pin 13note 21.431.932.43V
DC operating point pin 10note 21.431.932.43V
DC operating point pin 9note 21.431.932.43V
HIGH-level data output voltageI
LOW-level data output voltageI
Table 5 Surface Acoustic Wave Resonator (SAWR) data
DESCRIPTIONSPECIFICATION
Typeone-port
Centre frequency432.92 MHz ±75 kHz
Maximum insertion loss1.5 dB
Typical loaded Q1600 (50 Ω load)
Temperature drift0.032 ppm/K
2
Turnover temperature43 °C
1997 Aug 1218
Page 19
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
LAYOUT OF PRINTED-CIRCUIT BOARD FOR AC APPLICATION
handbook, full pagewidth
a. Copper side.
C5
L3
C6
C19
C10
C9
C20
V
CC
L5
C3
C1
SAWR
C11
C8
L2
C7
C2
L4
L1
C4
C12
C25
UAA3202M
C18
C24 C21
C16
R3
R2
R4
C23
C22
C13
C14
C17
DATA
POWER
DOWN
COMP
MHA813
b. Component side.
Fig.12 Printed-circuit board layout.
1997 Aug 1219
Page 20
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
PACKAGE OUTLINE
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
D
y
Z
2011
pin 1 index
c
A
2
A
1
E
H
E
SOT339-1
A
X
v M
A
Q
(A )
L
p
L
A
3
θ
110
w M
b
e
DIMENSIONS (mm are the original dimensions)
UNITA1A
Note
1. Plastic or metal protrusions of 0.20 mm maximum per side are not included.
A
max.
2.0
0.21
0.05
mm
OUTLINE
VERSION
SOT339-1 MO-150AE
A3b
2
1.80
0.25
1.65
IEC JEDEC EIAJ
p
0.38
0.25
p
cD
0.20
7.4
0.09
7.0
REFERENCES
02.55 mm
scale
(1)E(1)
5.4
0.65
5.2
1997 Aug 1220
detail X
eHELLpQ
7.9
7.6
1.03
0.63
0.9
0.7
PROJECTION
0.131.250.20.1
EUROPEAN
(1)
Zywvθ
0.9
0.5
ISSUE DATE
93-09-08
95-02-04
o
8
o
0
Page 21
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our
“IC Package Databook”
Reflow soldering
Reflow soldering techniques are suitable for all SSOP
packages.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
Wave soldering
Wave soldering is not recommended for SSOP packages.
This is because of the likelihood of solder bridging due to
closely-spaced leads and the possibility of incomplete
solder penetration in multi-lead devices.
(order code 9398 652 90011).
If wave soldering cannot be avoided, the following
conditions must be observed:
• A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave)
soldering technique should be used.
• The longitudinal axis of the package footprint must
be parallel to the solder flow and must incorporate
solder thieves at the downstream end.
Even with these conditions, only consider wave
soldering SSOP packages that have a body width of
4.4 mm, that is SSOP16 (SOT369-1) or
SSOP20 (SOT266-1).
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Repairing soldered joints
Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.
1997 Aug 1221
Page 22
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
DEFINITIONS
Data sheet status
Objective specificationThis data sheet contains target or goal specifications for product development.
Preliminary specificationThis data sheet contains preliminary data; supplementary data may be published later.
Product specificationThis data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1997 Aug 1222
Page 23
Philips SemiconductorsPreliminary specification
Frequency Shift Keying (FSK) receiverUAA3202M
NOTES
1997 Aug 1223
Page 24
Philips Semiconductors – a worldwide company
Argentina: see South America
Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113,
United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
Tel. +1 800 234 7381
Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,
Tel. +381 11 625 344, Fax.+381 11 635 777
For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications,
Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.
Internet: http://www.semiconductors.philips.com
Printed in The Netherlands547027/1200/01/pp24 Date of release: 1997 Aug 12Document order number: 9397 750 02306
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