Data Sheet

INTEGRATED CIRCUITS
DATA SHEET
TDA1596T
IF amplifier/demodulator for FM
radio receivers
Product specification
File under Integrated Circuits, IC01
April 1991
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
GENERAL DESCRIPTION
The TDA1596T provides IF amplification, symmetrical quadrature demodulation and level detection for quality home and
car FM radio receivers and is suitable for both mono and stereo reception. It may also be applied to common front-ends,
stereo decoders and AM receiver circuits.
Features
• Simulates behaviour of a ratio detector (internal field strength and detuning-dependent voltage for dynamic AF signal
muting)
• Mono/stereo blend and field strength indication control voltage
• Three-state mode switch for FM, mute-on / FM, mute-off / FM-off
• Internal compensation of AF signal total harmonic distortion (THD)
• Two open collector stop pulse outputs for microcomputer tuning control (can be one stop pulse output by
wired-ANDing)
• Internal reference voltage source
• Built-in hum and ripple rejection circuits.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
VP
Supply voltage (pin 1)
IP
Supply current (pin 1)
V4(rms)
AF output voltage (RMS value)
S/N
CONDITIONS
MIN.
TYP.
MAX.
UNIT
7.5
8.5
12.0
V
VP = 8.5 V; I2 = I7 = 0 mA
−
20
26
mA
V20(rms) = 10 mV
180
200
220
mV
Signal-to-noise ratio
V20(rms) = 10 mV; fm = 400 Hz;
∆f = 75 kHz
−
82
−
dB
THD
Total harmonic distortion
−
V20(rms) = 10 mV; fm = 1 kHz;
I7 = 0 mA; ∆f = 75 kHz; FM mute
on; without de-emphasis;
without detuning
0.1
0.3
%
Tamb
Operating ambient temperature
range
−
+ 85
°C
−40
SEE ALSO DATA SHEET FOR TDA1596
PACKAGE OUTLINE
20-lead mini-pack; plastic (SO20; SOT163A); SOT163-1; 1996 August 12.
April 1991
2
IF amplifier/demodulator for FM radio
receivers
April 1991
3
Fig.1 Block diagram and application circuit.
(1) Connecting pin 13 to ground is only allowed for measuring the current at pin 16. It is not for use in application.
(2) In the FM, mute-on condition the unweighted level detector output is available from pin 3. In the FM, mute-off condition the variable resistor at pin 3 can be adjusted for
minimum 2nd harmonic distortion at pin 4.
Philips Semiconductors
Product specification
TDA1596T
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
PINNING
1
VP
supply voltage
2
LVA
level voltage adjustment
3
ULV
unweighted level output/K2 adjustment
4
AF0
AF output
5
Vref
reference voltage output
6
WLV
weighted level voltage output
7
MSW
mode switch
8
DDV
detune detector voltage
9
n.c.
not connected
10
DMI1
demodulator input 1
11
DMI2
demodulator input 2
12
n.c.
not connected
13
TSW
tau switch
14
ST1
stop pulse output 1
15
ST0
stop pulse output 0
16
MTV
mute voltage
17
GND
ground
18
LFD1
IF limiter feedback 1
19
LFD2
IF limiter feedback 2
20
IFI
IF input
April 1991
Fig.2 Pinning diagram.
4
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
FUNCTIONAL DESCRIPTION
Limiter-amplifier
This has five stages of IF amplification using balanced differential limiter-amplifiers with emitter--follower coupling.
Decoupling of the stages from the voltage supply lines and an internal high-ohmic DC feed-back loop give a very stable
IF performance. The amplifier gain is virtually independent from temperature changes.
FM demodulator
The demodulator is fully balanced and comprises two cross-coupled differential amplifiers. Quadrature detection of the
FM signal is performed by feeding one differential amplifier directly from the limiter--amplifier output, and the other via an
external 90° phase-shifting network. The demodulator has good stability and its zero cross-over shift is small. The
bandwidth of the demodulator output is restricted to approximately 1 MHz by an internal low-pass filter.
THD compensation
This circuit compensates non-linearities introduced by demodulation. For this to operate correctly the demodulator circuit
between pins 10 and 11 must have a loaded Q-factor of 19. Consequently there is no need for the demodulator tuned
circuit to be adjusted for minimum THD, instead the adjustment criterium is for a symmetrical stop pulse.
Mute attenuator and AF output
The control voltage for the mute attenuator at pin 16 is generated from the values of the level detector and the detuning
detector outputs. The mute attenuator has a fast attack and a slow decay which is determined by the capacitor at pin 16.
The AF signal is passed via the mute attenuator to the output at pin 4.
A weighted control voltage, available from pin 6, is obtained from the mute attenuator control voltage via a buffer-amplifier
which introduces an additional voltage shift and gain.
Level detector
The level detector generates a voltage output which is proportional to the field strength of the input signal. The
unweighted level detector output is available when the mode switch is operating in the FM, mute-on condition.
Tuning-stop outputs
The open collector outputs STOP-0 and STOP-1 (from pins 15 and 14 respectively) are voltages derived from the
detuning level and the field strength of the input signal. If only one tuning-stop output is required, pins 14 and 15 may be
tied together.
April 1991
5
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
VP = V1-17
Supply voltage (pin 1)
−0.3
+16
V
V5-17
Reference voltage range (pin 5)
−0.3
+ 10
V
V2-17
Level adjustment range (pin 2)
−0.3
+ 10
V
V7-17
Mode switch voltage range (pin 7)
−0.3
VP
V
V13-17
Control input voltage range (pin 13)
−
+6
V
−0.3
VP
V
THD compensation/unweighted field
V3-17
strength voltage range (pin 3)
Tuning-stop output voltage range
V15-17
STOP-0 (pin 15)
−0.3
VP
V
V14-17
STOP-1 (pin 14)
−0.3
VP
V
Tuning-stop output current
I15
STOP-0 (pin 15)
−
2
mA
I14
STOP-1 (pin 14)
−
2
mA
Tstg
Storage temperature range
−55
+ 150
°C
Tamb
Operating ambient temperature range
−40
+ 85
°C
Electrostatic
handling(1)
Ves
all pins except pins 5 and 6
−2000
+ 2000
V
Ves
pin 5
−2000
+ 900
V
Ves
pin 6
−2000
+ 1600
V
Note
1. Equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor.
THERMAL RESISTANCE
From junction to ambient (in free air)
April 1991
Rth j-a (max.)
6
=
95 K/W
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
CHARACTERISTICS
f = 10.7 MHz; VP = V1-17 = 8.5 V; VI = V20 (rms) = 1 mV; Tamb = 25 °C; measured in the circuit of Fig.3; tuned circuit at pins
10, 11 aligned for symmetrical stop pulses; all voltages are referred to ground (pin 17), unless otherwise specified
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
Supplies
VP = V1
Supply voltage
7.5
8.5
12.0
V
I1
Supply current at I2 = I7 = 0 mA
−
20
26
mA
25
40
55
kΩ
−
6
−
pF
FM demodulator
R10-11
Input impedance
C10-11
V4
DC output voltage (no-signal condition) at
V10, 11(p-p) ≤ 100 µV; V20(rms) ≤ 5 µV
2.75
3.10
3.45
V
R4-17
Output impedance
−
400
−
Ω
Mute attenuator control voltage
Control voltage (pin 16)
V16
at V20(rms) ≤ 5 µV
−
2.0
−
V
V16
at V20(rms) = 1 mV
−
3.45
−
V
R10-17
Output impedance (pin 16)
−
−
2.0
MΩ
V2
Level shift input (pin 2) internal bias voltage at
I2 = 0 mA
−
1.4
−
V
15
−
−
kΩ
R2-17
input impedance
Internal muting (Fig.6)
Internal attenuation of signals
± 22.5 kHz ≤ detuning ≤ ±80 kHz;
A = 20log[∆V4(FM mute-off)/∆V4(FM)]
A
at V16 ≥ 1 V5
−
0
−
dB
A
at V16 = 0.77 V5
1.5
3.0
4.5
dB
A
at V16 = 0.55 V5
−
20
−
dB
April 1991
7
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
SYMBOL
TDA1596T
PARAMETER
MIN.
TYP.
MAX.
UNIT
Attack and decay (pin 16)
Pin 13 connected to ground *
+I16
charge current
−
8
−
µA
−I16
discharge current
−
120
−
µA
Pin 13 connected to Vref
+I16
charge current
−
100
−
µA
−I16
discharge current
−
120
−
µA
Level detector
∆V 6
-------------V 6 ∆T
Dependence of output voltage on temperature
−
3.3
−
mV/VK
R6
Output impedance
−
−
500
Ω
Dependence of output voltage (pin 6) on input voltage
(pin 20) (Fig.7):
V6
V20(rms) ≤ 5 µV; I2 = I7 = 0 mA
0.1
0.7
1.3
V
V6
V20(rms) = 1 mV; I2 = I7 = 0 mA
3.0
3.6
4.2
V
1.4
1.7
2.0
V/20 dB
∆V 6
---------------------------20 ∆log V 20
Slope of output voltage (pin 6) for input voltage range
V20(rms) ≥50 µV to V20(rms) ≤50 mV
Dependence of output voltage (pin 6) on detuning
(Fig.8) at input voltage V20(rms) = 10 mV:
∆V6
detuning = ≤ ±45 kHz
−
−
0.2
V
±∆f
detuning for V6 = 1.8 V
90
−
160
kHz
V6
detuning = ±200 kHz
0.5
0.7
0.9
V
−
35
−
mV/kHz
1.6
2.0
−
V
|∆V6/∆f|
Slope of output voltage with detuning = 125 ± 20 kHz
at V20(rms) = 10 mV
Level shift control (pin 2) (Fig.9)
±∆V6
adjustment range
−(∆V6/∆V2)
adjustment gain
−
1.7
−
V
V6
output voltage at V2 = V5; V20(rms) ≤ 5 µV
−
−
0.3
V
V20(rms) ≤ 5 µV
−
2.2
−
V
Internal resistance
12
25
50
kΩ
Low-pass filter at pin 8
Output voltage at I7 = 0 mA;
V8
R8(int)
April 1991
8
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
SYMBOL
TDA1596T
PARAMETER
MIN.
TYP.
MAX.
UNIT
Tuning-stop detector (Figs 10 and 11)
Stop-0: detuning at V20(rms) = 10 mV
+∆f
for V15 ≥ 3.5 V
−
−
10
kHz
+∆f
for V15 ≤ 0.3 V
18
−
−
kHz
Stop-1: detuning at V20(rms) = 10 mV
−∆f
for V14 ≥ 3.5 V
−
−
10
kHz
−∆f
for V14 ≤ 0.3 V
18
−
−
kHz
250
−
−
µV
−
−
50
µV
−
−
0.3
V
−
−
1.4
V
−
2.8
−
V
−
−
2.5
µA
−
2
−
V
−
−
100
Ω
Dependence of STOP-0, STOP-1 on
input voltage (pin 20)
input voltage (RMS value) for
V20(rms)
V14 = V15 ≥ 3.5 V
V20(rms)
V14 = V15 ≤ 0.3 V
input voltage (RMS value) for
Output voltage when
V14, 15
I14 = I15 = 1 mA
Mode switch and pin 3 (Fig.12)
FM-off position
Control voltage for 60 dB
V7
muting depth
FM, mute-on position (pin 3 = output)
Internal bias voltage at
V7
|I7|
R7-17 ≥ 10 MΩ
Input current
Output voltage with
V3
R3-17 = 10 kΩ; C3-17 ≥ 1 nF*
Output impedance for V20 = ≤ 5 µV;
R3-17
I3 = 500µA
FM, mute-off position (pin 3 = input)
V7
Control voltage
0.9 V5
−
−
V
I7
Input current at V7 = V5
−
−
15
µA
R3-17
Input resistance
1
−
−
MΩ
Reference voltage source
V5
Output voltage at I5 = −1 mA
3.3
3.7
4.1
V
∆V5/I5
Output impedance at I5 = −1 mA
−
40
80
Ω
TC
Temperature coefficient
−
3.3
−
mV/K
* Connecting pin 13 to ground is only allowed for measuring the current at pin 16. It is not for use in application.
* Without input voltage.
April 1991
9
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
OPERATING CHARACTERISTICS
f = 10.7 MHz; VI = V20(rms) = 1 mV; deviation (∆f) = 22.5 kHz; modulation frequency (fm) = 400 Hz; de-emphasiss (pin 4)
= 50 µs; test circuit as per Fig.3; tuned circuit (QL = 19) aligned for symmetrical stop pulses; Tamb = + 25 °C; unless
otherwise specified
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
V4(rms)
AF output voltage (RMS value) at
V20(rms) = 10 mV
180
200
220
mV
V20(rms)
Start of limiting (FM, mute-off); (RMS value)
(Fig.13)
14
22
35
µV
Dependence of signal-to-noise ratio (in noise
frequency band 250 Hz to 15 kHz, unweighted)
on input voltage
V18(rms)
for S/N = 26 dB
−
15
−
µV
V18(rms)
for S/N = 46 dB
−
60
−
µV
−
82
−
dB
THD
THD (FM, mute-on) at V20(rms) = 10 mV; ∆f = 75
kHz; fm = 1 kHz; without detuning; without
de-emphasis; I7 = 0 mA
−
0.1
0.3
%
αD
Dynamic mute attenuation (Fig.14)
−
16
−
dB
−
0.8
−
dB/kHz
−
−
0.6
%
S/N
at V20(rms) = 10 mV; ∆f = 75 kHz
V 4 ( FM mute – off )
α D = 20 log --------------------------------------------------------V 4 ( FM , mute – on )
with fm = 100 kHz; ∆f = 75 kHz
αD∆f
Slope of attenuation curve
THD (FM, mute-on) at V20(rms) = 10 mV;
∆f = 75 kHz; fm = 1 kHz;
detuning ≤± 25 kHz without
THD
de-emphasis; I7 = 0 mA (Fig.15)
THD (FM, mute-off and compensated via
pin 3) at V20(rms) = 10 mV;
∆f = 75 kHz; fm = 1 kHz;
THD
V3
April 1991
−
0.07
0.25
%
Voltage range at pin 3 for THD compensation
0
−
V5
V
AM suppression (FM, mute-off) with amplitude
modulation at 30% input voltage range
V20 = 300 µV to 100 mV (Fig.16)
−
65
−
dB
V7 = V 5
Power supply ripple rejection = 20log [∆V1/∆V4]
33
36
−
dB
Mute attenuation (FM-off)
= 20log [V4(FM-on/V4(FM-off)]
60
−
−
dB
10
Philips Semiconductors
Product specification
TDA1596T
Fig.3 Test circuit.
IF amplifier/demodulator for FM radio
receivers
April 1991
11
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
Fig.4 Printed-circuit board component side, showing component layout. For circuit diagram see Fig.3.
Fig.5 Printed-circuit board showing track side.
April 1991
12
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
Fig.6
Typical curve of internal attenuation showing the relationship between the mute attenuator control voltage
(pin 16) and mute attenuation; I2 = I7 = 0 mA
Fig.7
Weighted field strength output voltage (pin 6) as a function of input voltage (pin 20); R6-17 ≥ 10 kΩ;
I2 = I7 = 0 mA.
April 1991
13
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
Fig.8
Weighted field strength output voltage (pin 6) as a function of detuning; R6-17 ≥ 10 kΩ; I2 = I7 = 0 mA;
V20 = 10 mV.
Fig.9
Adjustment range of weighted field strength output voltage (pin 6) with level shift control (pin 2);
R6-17 ≥ 10 kΩ; I7 = 0 mA.
April 1991
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Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
(a) STOP-0.
(b) STOP-1.
Fig.10 STOP-0 and STOP-1 output voltages as a function of detuning, measured at V20 = 10 mV.
April 1991
15
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
Fig.11 STOP-0 or STOP-1 output voltages as a function of input voltage at pin 20.
Fig.12 Switch levels at pin 7.
April 1991
16
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
(a) mode switch at FM, mute-on
(b) mode switch at FM, mute-off
Fig.13 Audio signal (∆f = 22.5 kHz; fm = 1 kHz) and noise as functions of input voltage at pin 20; measured with
50 µs de-emphasis.
April 1991
17
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
Fig.14 Dynamic mute attenuation as a function of frequency deviation for modulation frequencies of 40, 60, 80
and 100 kHz.
Fig.15 THD as a function of detuning, mode switch at FM, mute-on position; ∆f = 75 kHz; fm = 1 kHz;
V20(rms) = 10 mV.
April 1991
18
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
(a) mode switch at FM, mute-on
(b) mode switch at FM, mute-off
Fig.16 Typical curves showing AM suppression for an input signal having frequency modulation at ∆f = 22.5 kHz
and fm = 1 kHz, and amplitude modulation of 30% at a frequency of 400 Hz; de-emphasis time = 50 µs and
bandwidth = 250 Hz to 15 kHz.
April 1991
19
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
PACKAGE OUTLINE
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
D
E
A
X
c
HE
y
v M A
Z
11
20
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
L
1
10
e
bp
detail X
w M
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
mm
2.65
0.30
0.10
2.45
2.25
0.25
0.49
0.36
0.32
0.23
13.0
12.6
7.6
7.4
1.27
10.65
10.00
1.4
1.1
0.4
1.1
1.0
0.25
0.25
0.1
0.9
0.4
0.012 0.096
0.004 0.089
0.01
0.019 0.013
0.014 0.009
0.51
0.49
0.30
0.29
0.050
0.42
0.39
0.055
0.043
0.016
0.043
0.039
0.01
0.01
0.004
0.035
0.016
inches
0.10
Z
(1)
θ
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT163-1
075E04
MS-013AC
April 1991
EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
92-11-17
95-01-24
20
o
8
0o
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
SOLDERING
Wave soldering
Introduction
Wave soldering techniques can be used for all SO
packages if the following conditions are observed:
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.
• 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.
• The package footprint must incorporate solder thieves at
the downstream end.
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” (order code 9398 652 90011).
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.
Reflow soldering
Reflow soldering techniques are suitable for all SO
packages.
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.
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.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
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.
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.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
April 1991
21
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio
receivers
TDA1596T
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This 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.
April 1991
22
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