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INTEGRATED CIRCUITS
DATA SHEET
TEA6100 FM/IF system and microcomputer-based tuning interface
Product specification File under Integrated Circuits, IC01 August 1987
Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
GENERAL DESCRIPTION The TEA6100 is a FM/IF system circuit intended for microcomputer controlled radio receivers. The circuit includes highly sensitive analogue circuitry. The digital circuitry, including an I2C bus, controls the analogue circuitry and the AM/FM tuning and stop information for the microcomputer. Features * 4-stage symmetrical IF limiting amplifier * Software selectable AM or FM input * Symmetrical quadrature demodulator * Single-ended LF output stage * D.C. output level determined by the input signal * Semi-adjustable AM and FM level voltage * Multi-path detector/rectifier/amplifier circuitry * 3-bit level information and 3-bit multi-path information PACKAGE OUTLINE 20-lead DIL; plastic (SOT146); SOT146-1; 1996 August 13.
TEA6100
* Signal dependent 'soft' muting circuit; externally adjustable * Reference voltage output (FM mode only) * 8-bit AM/FM frequency counter with selectable counter resolution * Possibility to measure the AM IF frequency at 460 kHz (250 Hz resolution) and 10,7 MHz (500 Hz resolution) * Reference frequency can be directly connected to the reference frequency output of a frequency synthesizer (TSA6057, 40 kHz) .
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
QUICK REFERENCE DATA PARAMETER Supply voltage Supply current FM/IF sensitivity Signal plus noise to noise ratio Audio output voltage after limiting AM suppression f = 22,5 kHz VIFM = 600 V to 600 mV; m = 0,3 Frequency counter sensitivity AM pin 19, f = 10,7 MHz f = 460 kHz FM Resolution of the frequency counter AM FM pin 18, f = 10,7 MHz reference frequency of 40 kHz; IF = 460 kHz IF = 10,7 MHz fs (AM) fs (AM) fs (FM) - - - 250 500 6,4 - - - Vi(FM) - 45 - Vi(AM) Vi(AM) - - 45 20 - - AMS - 60 - Vo - 200 - -3 dB before limiting f = 75 kHz; VI = 10 mV (S + N)/N - 85 - Vi - 15 - CONDITIONS SYMBOL VP1, VP2 IP1 + IP2 - - MIN. TYP. 8,5 35 - -
TEA6100
MAX. V
UNIT mA V dB mV
dB
V V V
Hz Hz kHz
August 1987
3
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FM/IF system and microcomputer-based tuning interface TEA6100
Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
PINNING 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 VP1 MUTE IN LA OUT RT/A IN RT/A OUT Fref DGND VP2 SCL SDA LF OUT Q-DET Q-DET LADJ Vref FB DEC FB DEC INPUT 1 INPUT 2 AGND analogue supply voltage mute input level amplifier output rectifier/amplifier input rectifier/amplifier output reference frequency input digital ground digital supply voltage serial clock line; I2C bus serial data line; I2C bus audio output signal phase shift for quadrature detector phase shift for quadrature detector level amplifier adjustment reference voltage decoupled feedback decoupled feedback FM/AM IF input AM/FM IF input analogue ground Fig.2 Pinning diagram.
TEA6100
FUNCTIONAL DESCRIPTION (see Figs 1 and 16) The IF amplifier consists of four balanced limiting amplifier stages, two separate inputs (AM and FM) and one output. Software programming (see Table 2; Figs 4 and 5) allows the input signals (AM/FM) to be inserted on either input (pin 18 or 19). The output drives the frequency counter and via the mute stage, drives the quadrature detector. The output of the quadrature detector is applied to an audio stage (which has a single-ended output). The AM/FM level amplifier, which is driven by 5 IF level detectors, generates a signal dependent d.c. voltage. The level output voltage is used internally to control the mute stage and, if required, the signal can be used externally to control the stereo channel separation and frequency response of a stereo decoder. The signal is also feed to the analogue-to-digital converter (ADC). Due to the front-end spread in the amplification, the level voltage is made adjustable (LADJ, pin 14). The level voltage amplifier controls the mute stage and this insures the -3 dB limiting point remains constant, independent of the front-end spread. AM and FM mode have different front-end circuitry, therefore LADJ must be adjustable for both inputs. The output voltage of the level amplifier is dependent upon the field strength of the input signal. The multi-path of the FM signal exists in the AM modulation of the input signal. The following method is used to determine the level information and the amount of multi-path (as a DC voltage): * the IF level detector detects the multi-path and feds the signal, via the level amplifiers, to the external bandpass filter (pin 3) and ADC1 * the signal is then fed to an internal rectifier * the rectified signal is then fed to an amplifier, so at pin 5 the DC level information is externally available and internally used by ADC2 In the FM mode, the DC information concerning the multi-path is available at pin 5 and the level information is available at pin 3. August 1987 5
Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
In the AM mode, the level information at pin 3 cannot be directly used owing to AM modulation on the output signal of the level amplifier. This signal requires filtering, which is achieved by the following method: * the multiplexer is switched to a position which causes the signal to be applied to the attenuator * after attenuation the signal is fed to an amplifier (the resultant gain of attenuator and amplifier is unity), after amplification the signal is filtered by an internal resistor and external capacitor * after filtering the signal is applied to ADC2 and is externally available In AM mode pin 5 contains the level information. The voltages on pin 3 and 5 are converted into two 3-bit digital words by the ADC, which can then be read out by the I2C bus. The meaning of the 3- bit words is shown in Table 1. Table 1 3-bit words POSITION WORD FM 1 2 multipath level AM level without modulation level with modulation
The FM modulated signal is converted into an audio signal by the symmetrical quadrature detector. The main advantage of such a detector is that it requires few external components. An FM signal requires good AM suppression, and as a result, the IF amplifiers must act as limiters. To achieve good suppression on small input signals the IF amplifiers must have a high gain and thus a high sensitivity. High sensitivity is an undesirable property when used in car radio applications, this problem is solved by having an externally adjustable mute stage to control the overall sensitivity of the device. The IF mute stage is controlled by the level amplifier (soft muting) and is only active in FM mode. If the input falls below a predetermined level, the mute stage becomes active. To avoid the 'ON/OFF' effect of the audio signal due to fluctuations of the input signal, the mute stage is activated rapidly but de-activated slowly. The mute stage is de-activated slowly, via a current source and an external capacitor at pin 2, to avoid aggressive behaviour of the audio signal. It is possible to adjust the '-3 dB limiting point' of the audio output via the level voltage due to the level signal being externally adjustable. If hard muting is required then pin 2 must be switched to ground. The 8-bit counter allows accurate stop information to be obtained, because exact tuning is achieved when the measured frequency is equal to the centre frequency of the IF filter. To measure the input frequency, the number of pulses which occur in a defined time must be counted. This defined time is refered to as 'window'. A wide window indicates a long measuring time and therefore a high accuracy. The counter resolution is defined as Hertz per count. Due to the TEA6100 having to measure the IF frequencies of AM and FM, the counter resolution must be adjustable (different channel spacing). The counter resolution depends on the setting of dividers 1 (N1), divider 2 (N2) and the reference frequency (Fref). The divider ratios of N1 and N2 are controlled by software (see section PROGRAMMING INFORMATION). In Table 3 the window and counter resolution has been calculated for a reference frequency of 40 kHz. The accuracy is controlled by bit 7 of the input word. Although the resolution is the same for bit 7 = logic 0 and bit 7 = logic 1, the width of the window doubles when bit 7 = logic 1. * bit 7 = 0, accuracy = counter resolution * bit 7 = 1, accuracy = 12 counter resolution
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
Communication between TEA6100 and the microcomputer is via a two wire bidirectional I2C bus. The power supply lines are fully isolated to avoid cross talk between the digital and analogue parts of the circuit.
Fig.3 Input data format waveforms.
Table 2 BIT 1 2 3 4 5 6 7 8
Input bits FUNCTION reference frequency IF mode IF input counter input counter mode resolution accuracy test mode AM pin 19 460 kHz AM divide by 8 LOW OFF LOGIC 0 32 kHz FM pin 18 10,7 MHz FM divide by 1 HIGH ON LOGIC 1 40 kHz A B C D E F G H SEE Fig.5 AND 6
August 1987
7
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FM/IF system and microcomputer-based tuning interface TEA6100
Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
Fig.5 Switch positions, analogue part (switches drawn in logic 0 state).
August 1987
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FM/IF system and microcomputer-based tuning interface TEA6100
Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
Table 3
TEA6100
Possible window settings and counter resolutions with a 40 kHz reference frequency (see Figs 5 and 6) WINDOW (ms) COUNTER RESOLUTION Hz / COUNT IF FREQUENCY (kHz) READ OUT BY IF FREQUENCY (HEX) RANGE (kHz) MIN. MAX. 466,875 461,500 466,875 461,500 520,000 620,800 520,000 620,800 535,000 492,000 535,000 492,000 2116,000 1688,800 2116,000 1688,800
POSITION OF SWITCH ADEFG
00000 10000 00001 10001 00100 10100 00101 10101 00010 10010 00011 10011 00110 10110 00111 10111 01000 11000 01001 11001 01100 11100 01101 11101 01010 11010 01011 11011 01110 11110 01111 11111
25,6 32,0 51,2 64,0 128,0 160,0 256,0 320,0 3,2 4,0 6,1 8,0 16,0 20,0 32,0 40,0 25,6 32,0 51,2 64,0 128,0 160,0 256,0 320,0 3,2 4,0 6,4 8,0 16,0 20,0 32,0 40,0
39,1 31,3 39,1 31,3 1000,0 800,0 1000,0 800,0 312,5 250,0 312,5 250,0 8000,0 6400,0 8000,0 6400,0 625,0 500,0 625,0 500,0 1000,0 800,0 1000,0 800,0 5000,0 4000,0 5000,0 4000,0 8000,0 6400,0 8000,0 6400,0
460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 460,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0 10700,0
4F CF 4F CF C3 36 C3 36 0F 7F 0F 7F 30 3F 30 3F 2F E7 2F E7 C3 36 C3 36 AB C2 AB C2 30 7F 30 7F
456,914 453,531 456,914 453,531 265,000 416,800 256,000 416,800 455,312 428,250 455,312 428,250 76,000 56,800 76,800 56,800
10670,625 10830,000 10584,500 10712,000 10670,625 10830,000 10584,000 10712,000 10505,000 10760,000 10656,800 10860,800 10505,000 10760,000 10656,800 10860,000 9845,000 9924,000 9845,000 9924,000 9887,200 9887,200 11120,000 10944,000 11120,000 10944,000 11519,200 11519,200
10316,000 12356,000 10316,000 12356,000
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
RATINGS Limiting values in accordance with the Absolute Maximum System (IEC 134) PARAMETER Supply voltage Total power dissipation Storage temperature range Operating ambient temperature range THERMAL RESISTANCE From junction to ambient Rth j-a CONDITIONS pins 1 and 8 SYMBOL VP1, VP2 Ptot Tstg Tamb 0 -65 -30 MIN. see Fig.7 +150 +85
TEA6100
MAX. 13,2 V
UNIT
C C
70 K/W
Fig.7 Power derating curve.
DC CHARACTERISTICS (note) VP1 = VP2 = 8,5 V; Tamb = 25C; all currents positive into the IC; unless otherwise specified PARAMETER Supply voltage Supply current FM mode AM mode digital part Power dissipation VADJ > 2,4 V VADJ > 2,4 V IP1 IP1 IP2 Pd - - - - 19 15 16 280 25 25 23 - mA mA mA mW CONDITIONS pins 1 and 8 SYMBOL VP1, VP2 MIN. 7,5 TYP. 8,5 MAX. 12 UNIT V
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
AC CHARACTERISTICS (note 1) VP = 8,5 V; Vi(FM) = 1 mV; f = 10,7 MHz; f = 22,5 kHz; fm = 1 kHz; FM mode; unless otherwise specified PARAMETER IF amplifier, quadrature detector and LF amplifier output Sensitivity Sensitivity Signal plus noise to noise ratio CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
pin 11 -3 dB before limiting; inactive mute S/N = 26 dB; inactive mute Vi(FM) = 10 mV; bandwidth = 0,3 to 15 kHz; f = 75 kHz (S + N)/N Vi(FM) - - 85 0,09 to 1000 - - dB mV Vi(FM) - 12 - V Vi(FM) - 15 30 V
IF input range
AM suppression > 40 db
Audio output voltage after limiting Total harmonic distortion for single tuned circuit AM suppression f = 75 kHz note 2; see Figs 8, 9 and 10; Vi(AM) range = 200 V to 600 mV Vi(AM) range = 200 V to 600 V Supply voltage ripple rejection IF counter inputs Frequency counter sensitivity FM mode AM mode AM mode Maximum input voltage Vi - - 1 V minimum input voltage for a readout 1 bit; 10,7 MHz 10,7 MHz 460 kHz Vi(FM) Vi(AM) Vi(AM) - - - - - - 60 60 45 V V V 200 Hz; 20 log (Vi / Vo) SVRR 38 40 - dB AMS - 55 - dB AMS - 60 - dB THD - 0,65 - % f = 22,5 kHz Vo 160 200 240 mV
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
PARAMETER FM level performance Output voltage adjustment range Maximum output voltage Adjustable gain Level voltage slope Output impedance of level amplifier AM level performance Output voltage adjustment range Vi(AM) = 0 V; pins 5 and 14 Vi(AM) = 10 mV; pins 5 and 14 Adjustable gain Level voltage slope IF soft muting Mute operating range Mute voltage Maximum muting IF hard muting Mute voltage Mute discharge current VMUTE = 1 V; VLEVEL = 0 V; mute ON; pin 2 Mute charging current VMUTE = 0 V; mute OFF -I2 - 1,5 - +I2 - 270 - -3 dB output attenuation VLFM = 0,1 V VMUTE; pin 2 -60 dB output attenuation VMUTE - 460 - VLFM VMUTE 1,20 - 1,45 19 1,75 - VLFM - 0,1 to 2,5 - Vi(AM) / VADJ VADJ = 2,4 V; Vi(FM) = 100 to 10 mV VLFM; pin 3; see Fig.13 Si(AM) 1,3 1,5 1,7 VLAM GADJ 6 - - -2 - - VLFM - 0,1 to 4,6 - VLFM > 1 V see Fig.12 |Zo| - 100 - pins 3 and 14 Vi(FM)/VADJ VADJ = 2,4 V; Vi(FM) = 100 to 10 mV Si(FM) 1,4 1,6 1,8 VLFM GADJ VP-1,5 - - -2 - - Vi(FM) = 0 V; pins 3 and 14 VLFM - 0,1 to 4,6 - CONDITIONS see Fig.11 SYMBOL MIN. TYP.
TEA6100
MAX.
UNIT
V V dB V/dec(6)
V V dB V/dec(6)
V V dB
mV
A A
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
PARAMETER Rectifier/amplifier Input impedance Conversion gain AC to DC pin 4 pins 4 and 5; bandwith = 100 Hz to 120 kHz; 20 log VO(MP) (d.c.)/ Vi(MP) (a.c.) DC output voltage range Output characteristics Discharge current Output ripple in AM mode (peakto-peak value) Multi-path output Reference voltage output Output voltage Output sink current Output impedance Output charge current Output voltage Output impedance I2C bus data format 3-bit ADC Trip level LOW Trip level HIGH Reference frequency input Reference range Input voltage LOW Input current HIGH pin 6 Fref VIL IIH - - 5 - - - 40 0,4 - AM mode AM mode see Fig.3 and 4; Table 2 multi-path and level information, note 5 VTL VTH 1,20 4,25 1,45 4,50 1,75 4,75 -I15 Vref |ZO| 5 - - - 0 14 - - - fm = 200 Hz; m = 0,8; Vi(AM) range = 100 V to 30 mV see Figs 14 and 15; note 4 pin 15, FM only Vref +I15 |ZO| - - - 4,4 - - - 1,5 10 Vripple - 300 400 see Fig.16; note 3 Io - 200 - VO(MP) - 0,2 to 6 - GA - 30 - |Zi| 7 10 13 CONDITIONS SYMBOL MIN. TYP.
TEA6100
MAX.
UNIT
k
dB V A
mV
V mA mA V k
V V
kHz V A
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
Notes 1. All characteristics are measured from the circuit shown in Fig.16. 2. Conditions for this parameter are: 20 log Vo(FM); m = 0,3 or 20 log Vo(AM); m = 0,3. 3. Voltage source followed by diode and resistor. 4. A DC shift can be achieved by connecting a 1,8 M resistor between pin 4 and pin 15. 5. Step size between trip levels: (VTH - VTL) / 6 0,07 V. 6. V/dec = voltage per decade.
TEA6100
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
(1) Audio (f = 22,5 kHz and fmod = 1 kHz) for VADJ = 0 V. (2) Noise (with dBA filter) for VADJ = 0 V. (3) AM suppression (m = 0,3 and fmod = 1 kHz) for VADJ = 0 V.
Fig.8 Audio output voltage performance plotted against input signal, Vi(FM).
(1) Audio (f = 22,5 kHz and fmod = 1 kHz) for VADJ = 2,4 V. (2) Noise (with dBA filter) for VADJ = 2,4 V.
Fig.9 Audio output voltage performance plotted against input signal, Vi(FM).
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
Fig.10 Total harmonic distortion; f = 75 kHz, fmod = 1 kHz and VADJ = O V.
(1) VADJ = 1,4 V. (2) VADJ = 2,4 V. (3) VADJ = 3,4 V.
Fig.11 Level voltage output (VLFM) plotted against IF input signal, Vi(FM); IF = 10,7 MHz.
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
(1) VADJ = 1,4 V. (2) VADJ = 2,4 V. (3) VADJ = 3,4 V.
Fig.12 Level voltage output (VLAM) plotted against IF input signal, Vi(AM); IF = 10,7 MHz or 460 kHz.
Fig.13 Soft muting plotted against level output voltage; Vi(FM) = 1 mV and f = 22,5 kHz.
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
(1) mod = 0,2 (2) mod = 0,3 (3) mod = 0,4
Fig.14 Multi-path output plotted against IF input signal, Vi(FM); fmod = 3 kHz (AM, no FM modulation), VADJ = 2,4 V and 1,8 M resistor connected between pin 4 and pin 15.
(1) mod = 0,2 (2) mod = 0,3 (3) mod = 0,4
Fig.15 Multi-path output plotted against IF input signal, Vi(FM); fmod = 3 kHz (AM, no FM modulation), VADJ = 2,4 V.
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
APPLICATION INFORMATION
TEA6100
Fig.16 Application diagram.
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
TEA6100
Fig.17 Track side of printed circuit board.
Fig.18 Component side of printed circuit board.
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
Double tuned circuit
TEA6100
R1 = 5,1 k, R2 = 1,5 k C1 = C2 = 150 pF (n = 220) C3 = C4 = 10 pF L1 = L2 = 1,6 H
Fig.19 Double tuned demodulator circuit.
Alignment of the circuit is obtained with an IF input signal > 200 V. Tuning the circuit is performed by, detuning L2, adjusting L1 to obtain a minimum distortion level and then adjusting L2 to obtain a minimum distortion level.
Fig.20 Total harmonic distortion plotted against IF detuning; for f = 75 kHz, fmod = 1 kHz and VO = 500 mV.
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
PROGRAMMING INFORMATION Converting the read out of the counters into frequency The counter resolution at the input is defined as: * resolution = divider ratio of N2/window
TEA6100
For every increment of the counter the counted frequency increases relative to the resolution in Hertz, as shown in example: * window = 20 ms; N2 = 128; IF frequency = 10,7 MHz; resolution = 128/0,02 = 6,4 kHz per count The counter consists of 8 bits. Therefore, the maximum frequency range that can be counted is 256 x resolution = 1,6384 MHz. In the example the frequency to be counted is 10,7 MHz, therefore, the counter will overflow (in the example above, 7 times). The real measured frequency is: * freal = (read out + overflow x 256) x resolution The overflow indicates the off-set on the frequency scale which must be added to the read out. Due to the bandwidth of the IF filter, the frequencies at the input to the TEA6100 are known, for example: * IF filter for FM has a center frequency of 10,7 MHz and -3 dB bandwidth of 300 kHz. Only the frequencies of 10,7 MHz 150 kHz occur at the input of the TEA6100. For this reason it is not necessary to count the overflow. The read out of the counter has to be translated into frequency. This translation depends upon the counter resolution. The preferred way to calculate the input frequency is to: * calculate the read out of the target IF frequency. Compare this value with that of the measured read out and multiply the difference by the resolution. The formulae for calculating the target IF read out and the resolution are as follows (A, D, E, F and G refer to the bits of the I2C bus input data as shown in Fig.3 and 4 and to the counter/timer block diagram shown in Fig.6. An, Dn, En, Fn and Gn are inverted values of the variables A, D, E, F and G. Table 3 shows the following formulae calculated for a reference frequency of 40 kHz): * N1 = (An x 4 + A x 5) x (En x 4 + E x 5) x 8 x (2[E x * Window (T) = N1/Fref * N2 = (E x 16 x 8 + En x [Dn x 1 +D x 16]) x (G x 2 + Gn x 1) * Target decimal read out (TDEC) = T x (TIFF/N2 + (E x 247 + En x 79). TIFF is the symbol for target IF frequency * Target read out hexadecimal (THEX), convert the target decimal read out to hexadecimal and use the 2 least significant digits (Do not use overflow value). The symbol for measured hexadecimal is MHEX * Resolution (R) = N2/T * Measured frequency (FI) = (TIFF) + R x (MHEX - THEX). Note Care should be taken if TIFF + 12 filter bandwidth is greater than the frequency for the read out of hexadecimal value FF, or if TIFF - 12 filter bandwith is less than the frequency at read out for hexadecimal value 00. * Counter accuracy (AW and AN), with bit 7 (G) the accuracy can be chosen with the same resolution. If bit 7 is logic 1 the accuracy is HIGH and if bit 7 is logic 0 then the accuracy is LOW. bit 7 = 0, AN = (N2/T) bit 7 = 1, AW = (12 x N2/T)
2 + G x 1])
x (F x 1 + Fn x 8)
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
Example The example uses the following values: TIFF = 10,7 MHz; accuracy = LOW (G = 0); Fref = 40 kHz (A = 1); IF frequency = 10, 7 MHz (D = 1); resolution = N1 (F = 1) and counter mode = FM (E = 1) N1 = (0 x 4 + 1 x 5) x (0 x 4 + 1 x 5) x 8 x (2[1 x 2 + 0 x 1]) x (1 x 1 + 0 x 8) = 800 T = 800/40 = 20 ms N2 = (1 x 16 x 8 + 0 x [1 x 1 + 0 x 16]) x (0 x 2 + 1 x 1) = 128 TDEC = 20 x 10,7/128 + (1 x 247 + 0 x 79) = 1919 THEX; 1919 is hexadecimal 77F and the least significant 2 digits are 7F, so THEX = 7 F R = 128/20 = 6400 Hz/count Assume the readout is '6E', the measured frequency will be: * FI = 10,7 + (6E - 7F) x 6400 = 10,59 MHz Assume the readout is '83', the measured frequency will be: * FI = 10,7 + (83 - 7F) x 6400 = 10,726
TEA6100
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
PACKAGE OUTLINE DIP20: plastic dual in-line package; 20 leads (300 mil)
TEA6100
SOT146-1
D seating plane
ME
A2
A
L
A1
c Z e b1 b 20 11 MH wM (e 1)
pin 1 index E
1
10
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 4.2 0.17 A1 min. 0.51 0.020 A2 max. 3.2 0.13 b 1.73 1.30 0.068 0.051 b1 0.53 0.38 0.021 0.015 c 0.36 0.23 0.014 0.009 D
(1)
E
(1)
e 2.54 0.10
e1 7.62 0.30
L 3.60 3.05 0.14 0.12
ME 8.25 7.80 0.32 0.31
MH 10.0 8.3 0.39 0.33
w 0.254 0.01
Z (1) max. 2.0 0.078
26.92 26.54 1.060 1.045
6.40 6.22 0.25 0.24
Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT146-1 REFERENCES IEC JEDEC EIAJ SC603 EUROPEAN PROJECTION
ISSUE DATE 92-11-17 95-05-24
August 1987
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Philips Semiconductors
Product specification
FM/IF system and microcomputer-based tuning interface
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" (order code 9398 652 90011). Soldering by dipping or by wave The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact DEFINITIONS Data sheet status Objective specification Preliminary specification Product specification Limiting values
TEA6100
with the joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. Repairing soldered joints Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 C, contact may be up to 5 seconds.
This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications.
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. PURCHASE OF PHILIPS I2C COMPONENTS
Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specification defined by Philips. This specification can be ordered using the code 9398 393 40011.
August 1987
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