GSG TCA440

GSG 勁力
半導体
Gunter Semiconductor GmbH
TCA440
EDITION 09/00
Integrated AM Circuit for
frequencies up to 30 MHz
For inquiry please contact :
China
Tel: 0086-755-3200442
Fax: 0086-755-3355520
Hong Kong
Tel : 00852-26190748
Fax: 00852-24948080
e-mail
[email protected]
Technical Data
TCA440/T
Edition 09/00
AM - Receiver Circuit
Description
Features
The TCA440/T is an efficient bipolar monolithic
circuit to apply in battery - powered or mains operated radio receivers up to 30 MHz. It contains
controlled RF stage, mixer, separated oscillator and
regulated multistage IF amplifier.
• symmetrical structured circuitry
• controlled RF prestage
• multiplicative balanced mixer, separated oscillator
• very well implemented large - signal characteristic
begins already from 4.5 V supply voltage
• terminals for indicating instrument
• controlled IF amplifier implementing 60 dB control
range
• external demodulator (diode)
• wide range of supply voltage between 4.5 and 15 V
Package
TCA440
• DIP 16
6.4 +0.2
- 0.1
19.4 ± 0.2
≤ 1.27
≥ 0.51
3.5 - 0.5
+1.0
3.6
≤ 5.1
+0.2
-0.1
≤ 1.40
≤ 0.98
0.47 ±0.12
2.50
+0.09
0.25
M
0.27 -0.07
7.55
7.9 . . . 9.7
09/00
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
1
1.35 ± 0.1
9.9 ± 0.1
6.0 ± 0.2
≤ 2.00
TCA440 T • SOP 16
0.19 +
0.15 -
0.15
≥ 0.3
0.42 +- 0.07
0.06
1.27
≤ 0.7
16
1
15
2
14
13
3
4
12
11
10
9
6
7
8
5
0.25
0.06
+ 0.1
0.05
0...8°
3.9 ± 0.1
M
Pin Configuration
1
2
3
4
5
6
7
8
RF prestage, input 1
RF prestage, input 2
RF control amplifier input
oscillator circuit pin 1
oscillator circuit pin 2
oscillator circuit pin 3
IF output
ground
9
10
11
12
13
14
15
16
input IF control amplifier
indicator output IF control amplifier
IF blocking
input lF amplifier
IF blocking
supply voltage
mixer output 1
mixer output 2
Block Diagram
IF REQUIRED
VCC
3
16
14
3.5V
3.5V
STABILISATION
HF - CIRCUIT
1
2
PRESTAGE
1st IF
STAGE
MIXER
2nd IF
STAGE
3rd IF
STAGE
7
4th IF
STAGE
AF
6
5
4
IF GAIN
CONTROL
OSCILLATOR
8
15
VCC
IF FILTER
12
11
13
10
9
TUNING
INDICATOR
VCC
2
09/00
TCA440/T
Functional Description
It contains several function units, which enable designing and assembling of efficient AM tuners. Caused by
internal voltage stabilization characteristics are rather independent from supply voltage.
The RF input signal reaches via a controllable and overdriving proof preselector stage a balanced mixer. By
means of a RF - signal generated by a separated oscillator the input signal is transported into IF. Multiplicative
mixing causes only few harmonic content. Gain control is carried out by means of two separated feedback control
loops for preselector stage and IF amplifier. By these a loop bandwidth of approximately 100 dB is obtained. The
control voltage of the IF - amplifier can be used to drive a moving - coil instrument (field strength indicator). The IF
amplifier consists of 4 amplifier stages, the first, second and third can be controlled. The bandwidth of the IF
amplifier is approximately 2 MHz and on that account sufficient for usual IF frequencies in the AM range of
approximately 460 kHz.
The symmetrical arrangement of the entire circuitry guarantees well oscillating. The bridge of the mixer avoids
direct breakdown.
Absolute Maximum Ratings
min
max
unit
4.5
15.0
V
150
°C
Supply voltage
VCC
Junction temperature
Tj
Ambient operating temperature
Ta
-15
80
°C
Storage temperature
Ts
-40
125
°C
Total thermal resistance
Rthja
120
K/W
min
max
unit
Recommended Operational Conditions
Supply voltage
VCC
4.5
15
V
Ambient operating temperature
Ta
-10
70
°C
09/00
TCA440/T
3
Characteristics
refer to application examples, fi = 1 MHz, fosc = 1.455 kHz, flF = 455 kHz, VCC = 9 V, fm = 1 kHz, m = 0.8,
voltages refer to ground, Ta = 20 to 25 °C, unless specified otherwise
Current and voltage supply
(no RF signal)
Supply voltage
V14-8
Current consumption
V14-8 = 4.5 V
V14-8 = 9 V
V14-8= 15 V
I14
I14
I14
Entire receiver
RF level variation
with ∆VNF = 6 dB
with ∆VNF = 10 dB
∆VRF
∆VRF
NF output voltages
(symmetrically measured at 1-2)
ViHF = 20 µV, m = 0.8
VNF(rms)
ViHF = 1 mV, m = 0.8
ViHF = 500 mV, m = 0.8
VNF(rms)
VNF(rms)
ViHF = 20 µV, m = 0.3
ViHF = 1 mV, m = 0.3
ViHF = 500 mV, m = 0.3
VNF(rms)
VNF(rms)
VNF(rms)
RF input sensitivity
measured at 60 Ω, m = 0.3,
RG = 540 Ω
signal-to-noise ratio
S + N/N = 6 dB
S + N/N = 26 dB
S + N/N = 58 dB
ViRF
ViRF
ViRF
Maximum RF input voltage
(THD = 10 %)
4
min
typ
max
unit
4.5
9
15
V
16
mA
mA
mA
7
10.5
12
65
80
dB
dB
60
140
mV
100
260
350
mV
mV
560
50
100
130
mV
mV
mV
1
7
1
µV
µV
mV
ViHF
1.5
V
10
8
%
%
50
MHz
Total harmonic distortion
VHF = 500 mV
VHF = 30 mV
THD
THD
RF part
Input frequency range
fiHF
Output frequency
f|F = fosc - fiHF
fIF
455
kHz
Control range
∆GV
38
dB
4.5
2.8
0
09/00
TCA440/T
min
IF suppression
between 1 - 2 and 15
typ
max
unit
alF
20
dB
Zi
Zi
2 II 5
2.2 II 1.5
kΩIIpF
kΩIIpF
Zi
Zi
4.5
4.5 II 1.5
kΩ
kΩIIpF
Mixer output impedance
(pin 15 or 16)
Zo
250 II 4.5
kΩIIpF
Steepness
SHF
28
mS
RF input impedance
unbalanced coupling
ViHFmax
ViHFmin
balanced coupling
ViHFmax
ViHFmin
IF part
Input frequency range
filF
Control range
filF = 455 kHz, ∆VNF = 10 dB
∆GV
62
dB
Start of control
(∆ViIF / ∆VNF = 10 dB / 3 dB)
maximum IF input voltage
(THDNF = 10 %)
VctrlF
140
µV
VilFmax
200
mV
NF output voltage
applied to 60 Ω
VZF = 30 µV
VZF = 3 mV
VZF = 3 mV; m = 0.3
VNF(rms)
VNF(rms)
VNF(rms)
50
200
70
mV
mV
mV
IF input impedance
(unbanlanced coupling)
ZilF
3 II 3
kΩllpF
ZO
200 II 8
kΩIIpF
IF output impedance
(pin 7)
0
2
MHz
Indication instrument
Recommended indication instruments: 500 µA (Ri = 800 Ω)
300 µA (Ri = 1.5 kΩ)
For indication a voltage source of 600 m V(EMF) and an internal source impedance of 400 Ω is available.
09/00
TCA440/T
5
Dependences
TCA 440 / T
S = f ( Vosc )
TCA 440 / T
800
S = I15 /V1;2
V10 = f ( V9 )
V10 ( mV )
S ( mS )
40
VCC = 9V; 5V
fIF = 455 kHz
fi = 1 MHz; V3 = 0V
VCC = parameter
R6 = 1.5 kΩ
600
30
9V
500
5V
9V
400
20
5V
300
200
10
100
0
10 1
10 2
10 3 V
osc ( mV )
0
100 200 300 400 500
TCA 440 / T
V9 ( mV ) 800
TCA 440 / T
500
500
V3 = f ( VgoHF )
V3 ( mV )
V3 ( mV )
V3 = f ( VgoHF )
VCC = parameter
fi = 1 MHz
400
VCC = parameter
fi = 1 MHz
9V
400
5V
300
300
9V
5V
200
200
100
100
0
6
10 2
10 3
10 4
VgoHF ( µV )
10 6
0
10 2
10 3
10 4
VgoHF ( µV )
10 6
09/00
TCA440/T
THD ( % )
VAF ( mV )
TCA 440 / T
VAF = f ( ViIF )
V3 = parameter
fIF = 455 kHz
400
TCA 440 / T
THD = f ( ViIF )
fIF = 455 kHz
m = 0.8; fm = 1 kHz
m = 0.8; fm = 1 kHz
8
9V
300
5V
6
200
4
5V
100
2
9V
0
10 1
V10 ( mV )
10 2
10 3
10 4
ViIF ( µV )
10 2
10 7
TCA 440 / T
V10 = f ( VgoHF )
500
VCC = parameter
fi = 1 MHz
10 3
10 4
10 6
ViIF ( µV )
9V
TCA 440 / T
800
V9 = f ( ViIF )
V9 ( mV )
0
5V
VCC = parameter
fIF = 455 kHz
600
400
9V
5V
300
400
200
200
100
0
10 0
09/00
TCA440/T
10 1
10 2
10 3
10 4 V
10
goHF (µV)
6
0
10 1
10 2
10 3
10 4
10 5
10 6 V
iIF
(µV)
7
ICC ( mA)
TCA 440 / T
VAF = f ( VgoHF )
TCA 440 / T
400
VgoHF = 0
18
9V
VCC = parameter
VAF (mV)
ICC = f ( VCC )
fIF = 455 kHz
5V
m = 0.8; fm = 1 kHz
300
16
14
200
12
10
100
8
6
0
5
7
8
9 10 11 12 V (V) 15
CC
10 0 10 1 10 2 10 3 10 4 10 5 V
10 8
goHF (µV)
TCA 440 / T
TCA 440 / T
VAF = f ( VgoHF )
THD = f ( VogHF)
VCC = parameter
THD ( % )
VAF ( mV )
400
6
9V
fIF = 455 kHz
fm = 1 kHz; m = 0.8
VCC = parameter
fIF = 455 kHz
fm = 1 kHz; m = 0.8
5V
300
8
6
200
5V
4
100
9V
2
0
8
10 0
10 1
10 2
10 3
10 4
VgoHF (µV)
10 6
0
10 0
10 1
10 2
VgoHF (mV)
10 3
09/00
TCA440/T
80
S+N (dB)
N
TCA 440 / T
V10 (mV)
fi = 1 MHz
fm = 1 kHz; m = 0.3
Rg = parameter
60
TCA 440 / T
500
S+N = f (P
)
gmax
N
VCC = 9 V
5V
V10 = f ( ViIF )
9V
VCC = parameter
fIF = 455 kHz
400
m = 0.8; fm = 1 kHz
50
300
40
1 kΩ
4.7 kΩ
30 Ω
250 Ω
30
200
20
Pgmax=
V2go
4Rg
100
10
0
10 -9
0
10 -7
10 -5
10- 3
10 1
10 -1 10 0 10 1
Pgmax(µW)
10 3
10 4 V (µV) 10 6
iIF
800
800
∆HFgain = f ( V3 )
VCC = parameter
V15 = 50 mV const.
600
TCA 440 / T
V9 ( mV )
V3 ( mV )
TCA 440 / T
5V
9V
400
200
200
5V
∆IFgain = f ( V9 )
VCC = parameter
VAF = 200 mV const.
fiIF = 455 kHz
fm = 1 kHz; m = 0.8
600
fiHF = 1 MHz
400
9V
0
0
0
09/00
TCA440/T
10 2
10
20
30
50
40
∆HFgain (dB)
0
10
20
30
40
50
60
∆IFgain (dB)
9
V15 ( mV )
800
V7 ( mV )
TCA 440 / T
V7 = f ( V9 )
ViIF = 100 µV
9V
V15 = f ( V3 )
VCC = parameter
40
fi = 455 kHz
VCC = parameter
600
TCA 440 / T
VgoHF = 700 µV
fi = 1 MHz
9V
30
5V
400
5V
20
200
10
0
0
0
200
400
600
V9 (mV)
800
0
100
200
300
400
V3 (mV)
Application Examples
• TCA 440
D2
VCC
C9
Fi4
Fi2
10n
C13
C12
W2
W1
10n
S4
1.5n
S2
S3
330
Rp2
W2
R6
1.5k
16
Fi1
C13
S5
W1
a
10
C11
1.5n
100n
W2
b
S6
R9
60
12
15
100n
5
A
TCA 440
C7
4.7µ
Fi3
2
Rp3 C5
~
~
3
8
11
13
C2
20µ
R2
8.2k
100n
R5
12k
VAF
C6
3.3n
9
R4
39k
R1
C1
1.5n
W
1
1.8k
D1
x
7
R
10
VIF
10n
14
6
25Ω ≤ RG ≤ 100Ω
4.7µ
C12
W1b
VgoHF
C10
C14
4
W1a
C8
S1
R3
100
C3
C4
100n
4.7µ
09/00
TCA440/T
• TCA440 T
+VCC
100n
W
47µ ±50%
+50%
-20%
Rp2
±2%
S2
1.5n
±2.5%
W
1.5k
10n
+50%
-20%
16
10
12
15
4
S3
W1a
14
100n
+50%
-20%
330p
±2.5%
5
W1
4.7µ
A
TCA 440 T
6
±50%
x
7
R
2
VgoHF
W
~
~
Rp3
12k
±2%
1.5n
±2.5%
1
3
8
11
13
9
1.8k
100 ±2%
±2%
3.3n
+50%
-20%
VAF
39k ±2%
S1
8.2k
25Ω ≤ RG ≤
100Ω
20µ
±20%
±5%
100n
+50%
-20%
100n
+50%
-20%
4.7µ
±50%
Application Hints
The PCB is to arrange such that there are maximum ground lines (ground area) voltage supply has to be blocked
to ground by a capacitor of 10...100 nF in order to avoid distortions. Blocking should be as close as possible to
the circuit.
The RF circuit has to layout such that 150 mV(rms) oscillator voltage are applied to pin 5. Symmetrically applying
an external oscillator is possible to pin 4 or pin 5. The unused input must be connected to ground via capacitor
and in the same time be connected to supply voltage at pin 6.
It is recommendable to profide off earth connections 1 and 3, because in this way common - mode interferences
more effectively can be suppessed. Single - sided capacitive control of pin 1 and 2 is possible, the unused input
must be connected to ground via capacitor.
Mixer outputs 15 and 16 can be used equivalently.
Load resistances of the mixer (IF selection) at pin 15 respectively pin 16 should run to approximately 7 kΩ.
To avoid saturation of the multiplier the maximum peak voltage occuring during operation should not exceed the
level (VCC - 3 V) IF response to voltage from pin 15 respectively pin 16 to pin 12 should be approximately - 18 dB
that the control characteristics of IF - and RF - part optimally be matched.
Peak voltage at pin 7 occuring during operation should not exceed 2 V that the IF output does not go into
saturation.
All the RF bypass capacitors should amount to 100 nF. Sufficient decoupling of wavemagnet and oscillator coil is
to be taken into consideration.
All components and parts must be carefully proportioned in order to obtain optimum wise characteristics.
Wavemagnets applied should so much mass as possible. The transformation ratio of the input circuitry should run
to 10...12.
In order to improve RF response characteristic a RF preselector can be additionally preceded or the wavemagnet
can be tighty coupled by means of an emitter follower impedance transformer.
Improvement of signal - to - noise ratio at average input voltages can be obtained by delayed control of the RF
part. Control should be start at approximately 1...2 mV.
Copying is generally permitted, indicating the source. However, our consent must be obtained in all cases. MEGAXESS reserves the
right to make changes in specifications at any time and without notice. The information and suggestions are given without obligation
and cannot give rise to any liability, they do not indicate the availability of the components mentioned. The information included
herein is believed to be accurate and reliable. However, MEGAXESS assumes no responsibility for its use; nor for any infringements
of patents or of other rights of third parties which may result from its use.
Megaxess GmbH Deutschland • POB 1370 • 15236 Frankfurt(Oder) • Germany
Phone +49 335 2005 • FAX +49 335 3251 • Internet http://www. megaxess.de
09/00
TCA440/T
11