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Dual Conversion AM Receiver
TDA 4360X
1 1.1 * * * * * * * * * * * * *
Overview Features
High flexibility with an external preamplifier stage Sym. or asym. mixer input 2-pin oscillator for the 1. LO 1. LO with LC tank circuit 1. LO at 100 MHz range P-DSO-28-1 Low narrow band noise Divider for 1. LO by 10 for the 100 kHz ... 2 MHz range and by 8 for the 2 MHz ... 6 MHz range Integrated AGC generation Strictly symmetrical RF path Decoupled counter output 2. LO with quartz or external source Output for gain controlled 2. IF Switchable AGC time constant Ordering Code Q67000-A5181 Package P-DSO-28-1
Type TDA 4360X 1.2 Application
The TDA 4360X is an integrated dual conversion AM receiver for use in car radios. The input signal passes a linear mixer for conversion into the 1. IF (~ 10 MHz). Via an external bandpass filter (CER filter, quartz filter) the 1. IF is converted in a second linear mixer to the 2. IF (~ 460 kHz). After an external narrowband selectivity (CER filter) the 2. IF passes an automatic gain controlled (AGC) amplifier and is then demodulated to the AF. The AGC time constant can be switched with a ratio of 20. For counter controlled search tuning stop (STS) the frequencies of the 1. LO and the 2. IF are available.
Semiconductor Group
1
04.96
TDA 4360X
1.3
Pin Configuration (top view) P-DSO-28-1
Figure 1
Semiconductor Group
2
04.96
TDA 4360X
1.4 Pin No. 1, 2
Pin Definitions and Functions Function Sym. Input for the AM signal in the frequency range of 100 kHz (SW) to 6.2 MHz (49m-Band) sym. application is recommended, asym. application is possible DC voltage alters the threshold voltage of the prestage AGC circuit. GROUND: All DC values are referred to this pin Buffered output for the by n divided (n = 8 or 10) oscillator frequency Output for the internal reference voltage. This pin is to be blocked with a ceramic capacitor to ground. The ext. LC circuit between pin 7 and pin 8 determines the oscillator frequency. Supply voltage. This point is to be blocked to ground for AF and for RF signals. Buffered output for the oscillator frequency Input for the frequency divider. Low voltage to pin 11 divides the oscillator frequency by 8, high voltage or open input divides by10. Blocking capacitor for the IF AGC circuit to suppress AF frequencies Input to select the fast or slow AGC time constant Buffered AF output
3 4 5 6 7, 8 9 10 11 12 13 14 15
Buffered output for the limited lower IF frequency. This signal is necessary for an IF Counter Tuning System. Buffered output for the AGC controlled lower IF signal. This pin is connected 16 to the AM stereo decoder. 17, 18, 19 Input pins for the DC coupled AGC amplifier 20 21, 22 Open collector output of mixer for the lower IF (~ 450 MHz). A DC connection to the tank circuit to Vref is recommended. Sym. mixer 2 input for the upper IF (~ 10.7 MHz). Asym. operation is possible. The input signal is converted to the lower IF corresponding the equation fLIF = fUIF - f2.LO. Input for the 2. local oscillator (LO). The pins can be connected via a quartz or the oscillator is to be forced with an ext. signal. Blocking capacitor for the prestage AGC A capacitor to ground determines the AGC time constant. The DC potential at this pin can be used for controlling the FET in the ext. prestage. Sym. collector output of the mixer 1. The external tank circuit is tuned to the upper IF.
3 04.96
23, 24 25 26 27, 28
Semiconductor Group
TDA 4360X
1.5
Functional Block Diagram
Figure 2 Block Diagram
Semiconductor Group 4 04.96
TDA 4360X
2
Circuit Description
The integrated circuit includes an 2-pin oscillator (1. LO) with sym. input, buffered output and a double balanced mixer with sym. input. These stages convert the AM input signal to a 1. IF which is much higher (~ 10 MHz) than the input frequencies. The 1. LO operates as a LC varactor oscillator in the same 100 MHz range like the FM tuner oscillator (e.g. TUA 4310X). So the same peripheral elements can be used. Depending on the signal strength the prestage AGC controls MOSFET prestage amplifiers. The 1. IF passes an external selectivity and is then converted in a sym. double balanced mixer to the 2. IF. The 2. LO operates as a quartz controlled oscillator or as an amplifier for an external signal. The 2. IF signal passes an automatic gain controlled (AGC) IF amplifier and is then demodulated to the AF in a quasi-synchronous demodulator. The AGC time constant can be switched with a ratio of 20. For fine tuning the decoupled 2. IF frequency is available. The TDA 4360X is prepared to work with a PLL in the 100 MHz range. When applied with a standard AM-PLL the oscillator frequency divided by 8 or 10 has to be used. In this case a higher phase noise is to be expected.
Semiconductor Group
5
04.96
TDA 4360X
3 3.1
Electrical Characteristics Absolute Maximum Ratings Symbol Limit Values min. max. +4 13.2 13.2 13.2 13.2 V 5 5 13 13 5 5 3 5 5 13.2 13.2 13.2 13.2 kV V V V V V V V V V V mA V V V V V V 1.5 k, 100 pF HBM -4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Unit Remarks
TA = - 40 C to 85 C
Parameter ESD Supply voltage Mixer 1 output Mixer 2 output Mixer 2 input AGC threshold Mixer 1 input
fOSC/n fOSC
Divide by n
VRef IRef
2. LO AGC amplifier input IF counter AM stereo output AF output IF AGC
VESD VS V27, V28 V20 V21, 22 V3 V1, 2 V5 V10 V11 V6 I6, 0 V23, 24 V17 ... 19 V15 V16 V14 V12
Note: Maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the integrated circuit.
Semiconductor Group
6
04.96
TDA 4360X
3.2
Operating Range Symbol min. Limit Values max. 13.2 + 85 V C 7.5 - 40 Unit
Parameter Supply voltage Ambient temperature
VS TA
Note: In the operating range the functions given in the circuit description are fulfilled.
3.3 AC/DC Characteristics Symbol Limit Values min. Current consumption Mixer 1 Intercept point 3. order Mixer gain Max. input voltage Noise figure (10 MHz) 1. LO Frequency range Counter output 110 5 dBV dB 600 10 mVpp dB typ. 55 max. mA Unit Test Condition Test Circuit
VS = 10 V, TA = + 25 C, fIF1 = 10.7 MHz, fIF2 = 456 kHz, fi = 1MHz
Parameter
IS
Vi 100 mVrms Vin = 10 mV,
1.8 k load
Vi F
f1.LO VC
100 100
140
MHz mVpp
Semiconductor Group
7
04.96
TDA 4360X
3.3
AC/DC Characteristics (cont'd) Symbol Limit Values min. typ. 100 0.7 2.4 max. mVpp V V 330 Unit Test Condition Test Circuit
VS = 10 V, TA = + 25 C, fIF1 = 10.7 MHz, fIF2 = 456 kHz, fi = 1MHz
Parameter Divided counter output Divide by 8 Divide by 10 Output impedance Mixer 2 Mixer gain Noise figure 2. LO Frequency range f2.LO External force voltage Prestage AGC Output AGC voltage AGC voltage 15 30 MHz mVrms F 3 10 dB dB
RC
Vin = 10 mV,
1.5 k load
VAGC1 VAGC1
5.8 0
7.2 0.5
V V
VDC = 2 V; Vi = 100 mVrms VDC = 4 V; Vi = 100 mVrms
AGC Amplifier AGC range AGC voltage Reg. output voltage Input sensitivity 66 dB 4.8 30 50 V mVrms Vrms 1
VAGC2 VIF V- 3dB
2.0
V18 = 0/100 mVrms 1
1 1
Semiconductor Group
8
04.96
TDA 4360X
3.3
AC/DC Characteristics (cont'd) Symbol Limit Values min. typ. - 500 - 25 max. A A Unit Test Condition Test Circuit 1 1
VS = 10 V, TA = + 25 C, fIF1 = 10.7 MHz, fIF2 = 456 kHz, fi = 1MHz
Parameter AGC current AGC current
IAGC IAGC
V18 = 10 mVrms, V13 2.4 V V18 = 10 mVrms, V13 0.7 V
Demodulator AF output voltage VAudio AF output voltage VAudio Total harm. distortion Input voltage for S + N/N = 6 dB k 180 480 1 10 60 60 VAudio 3 mVrms Vi = 10 mV, m = 0.3 1 mVrms Vi = 10 mV, m = 0.8 1 %
Vi = 10 mV, m = 0.8 1
1 1
Vi
Vrms m = 0.3 Vrms m = 0.3 dB dB
Input voltage for Vi S + N/N = 26 dB S + N/N AF linearity IF Counter IF counter output VC voltage
Vi = 10 mV, m = 0.8 1
100 V/100 mV 1
100
mVrms
1
Note: The listed characteristics are ensured over the operating range of the integrated circuit. Typical characteristics specify mean values expected over the production spread. If not otherwise specified, typical characteristics apply at TA = 25 C and the given supply voltage.
Semiconductor Group
9
04.96
TDA 4360X
Figure 3 Test Circuit
Semiconductor Group 10 04.96
TDA 4360X
Figure 4 Application Circuit
Semiconductor Group 11 04.96
TDA 4360X
4
Package Outlines P-DSO-28-1 (Plastic Dual Small Outline Package)
Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book "Package Information". SMD = Surface Mounted Device Semiconductor Group 12
Dimensions in mm 04.96
GPS05123

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