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d a t a sh eet product speci?cation file under integrated circuits, ic01 may 1984 integrated circuits TDA1072A am receiver circuit
may 1984 2 philips semiconductors product speci?cation am receiver circuit TDA1072A general description the TDA1072A integrated am receiver circuit performs the active and part of the filtering functions of an am radio receiver. it is intended for use in mains-fed home receivers and car radios. the circuit can be used for oscillator frequencies up to 50 mhz and can handle r.f. signals up to 500 mv. r.f. radiation and sensitivity to interference are minimized by an almost symmetrical design. the voltage-controlled oscillator provides signals with extremely low distortion and high spectral purity over the whole frequency range even when tuning with variable capacitance diodes. if required, band switching diodes can easily be applied. selectivity is obtained using a block filter before the i.f. amplifier. features inputs protected against damage by static discharge gain-controlled r.f. stage double balanced mixer separately buffered, voltage-controlled and temperature-compensated oscillator, designed for simple coils gain-controlled i.f. stage with wide a.g.c. range full-wave, balanced envelope detector internal generation of a.g.c. voltage with possibility of second-order filtering buffered field strength indicator driver with short-circuit protection a.f. preamplifier with possibilities for simple a.f. filtering electronic standby switch. quick reference data package outline 16-lead dil; plastic (sot38); sot38-1; 1996 august 09. supply voltage range v p 7,5 to 18 v supply current range i p 15 to 30 ma r.f. input voltage for s + n/n = 6 db at m = 30% v i typ. 1,5 m v r.f. input voltage for 3% total harmonic distortion (thd) at m = 80% v i typ. 500 mv a.f. output voltage with v i = 2 mv; f i = 1 mhz; m = 30% and f m = 400 hz v o(af) typ. 310 mv a.g.c. range: change of v i for 1 db change of v o(af) typ. 86 db field strength indicator voltage at v i = 500 mv; r l(9) = 2,7 k w v ind typ. 2,8 v
may 1984 3 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.1 block diagram and test circuit (connections shown in broken lines are not part of the test circuit). (1) coil data: toko sample no. 7xns-a7523dy; l1 : n1/n2 = 12/32; q o = 65; q b = 57. filter data: z f = 700 w at r 3-4 = 3 k w ; z i = 4,8 k w .
may 1984 4 philips semiconductors product speci?cation am receiver circuit TDA1072A functional description gain-controlled r.f. stage and mixer the differential amplifier in the r.f. stage employs an a.g.c. negative feedback network to provide a wide dynamic range. very good cross-modulation behaviour is achieved by a.g.c. delays at the various signal stages. large signals are handled with low distortion and the s/n ratio of small signals is improved. low noise working is achieved in the differential amplifier by using transistors with low base resistance. a double balanced mixer provides the i.f. output signal to pin 1. oscillator the differential amplifier oscillator is temperature compensated and is suitable for simple coil connection. the oscillator is voltage-controlled and has little distortion or spurious radiation. it is specially suitable for electronic tuning using variable capacitance diodes. band switching diodes can easily be applied using the stabilized voltage v 11-16 . an extra buffered oscillator output (pin 10) is available for driving a synthesizer. if this is not needed, resistor r l(10) can be omitted. gain-controlled i.f. ampli?er this amplifier comprises two cascaded, variable-gain differential amplifier stages coupled by a band-pass filter. both stages are gain-controlled by the a.g.c. negative feedback network. detector the full-wave, balanced envelope detector has very low distortion over a wide dynamic range. residual i.f. carrier is blocked from the signal path by an internal low-pass filter. a.f. preampli?er this stage preamplifies the audio frequency output signal. the amplifier output has an emitter follower with a series resistor which, together with an external capacitor, yields the required low-pass for a.f. filtering. a.g.c. ampli?er the a.g.c. amplifier provides a control voltage which is proportional to the carrier amplitude. second-order filtering of the a.g.c. voltage achieves signals with very little distortion, even at low audio frequencies. this method of filtering also gives fast a.g.c. settling time which is advantageous for electronic search tuning. the a.g.c. settling time can be further reduced by using capacitors of smaller value in the external filter (c16 and c17). the a.g.c. voltage is fed to the r.f. and i.f. stages via suitable a.g.c. delays. the capacitor at pin 7 can be omitted for low-cost applications. field strength indicator output a buffered voltage source provides a high-level field strength output signal which has good linearity for logarithmic input signals over the whole dynamic range. if the field strength information is not needed, r l(9) can be omitted. standby switch this switch is primarily intended for am/fm band switching. during standby mode the oscillator, mixer and a.f. preamplifier are switched off. short-circuit protection all pins have short-circuit protection to ground.
may 1984 5 philips semiconductors product speci?cation am receiver circuit TDA1072A ratings limiting values in accordance with the absolute maximum rating system (iec 134) thermal resistance device characteristics v p = v 13-16 = 8,5 v; t amb = 25 c; f i = 1 mhz; f m = 400 hz; m = 30%; f if = 460 khz; measured in test circuit of fig.1; unless otherwise speci?ed supply voltage v p = v 13-16 max. 20 v total power dissipation p tot max. 875 mw input voltage ? v 14-15 ? max. 12 v - v 14-16 , - v 15-16 max. 0,6 v v 14-16 , v 15-16 max. v p v input current ? i 14 ? , ? i 15 ? max. 200 ma operating ambient temperature range t amb - 40 to + 80 c storage temperature range t stg - 55 to + 150 c junction temperature t j max. + 125 c from junction to ambient r th j-a = 80 k/w parameter symbol min. typ. max. unit supplies supply voltage v p = v 13-16 7,5 8,5 18 v supply current i p = i 13 15 23 30 ma r.f. stage and mixer input voltage (d.c. value) v 14-16 , v 15-16 - v p /2 - v r.f. input impedance at v i < 300 m vr 14-16 , r 15-16 - 5,5 - k w c 14-16 , c 15-16 - 25 - pf r.f. input impedance at v i > 10 mv r 14-16 , r 15-16 - 8 - k w c 14-16 , c 15-16 - 22 - pf i.f. output impedance r 1-16 500 -- k w c 1-16 - 6 - pf conversion transconductance before start of a.g.c. i 1 /v i - 6,5 - ma/v maximum i.f. output voltage, inductive coupling to pin 1 v 1-13(p-p) - 5 - v d.c. value of output current (pin 1) at v i = 0 v i 1 - 1,2 - ma a.g.c. range of input stage - 30 - db r.f. signal handling capability: input voltage for thd = 3% at m = 80% v i(rms) - 500 - mv
may 1984 6 philips semiconductors product speci?cation am receiver circuit TDA1072A oscillator frequency range f osc 0,6 - 60 mhz oscillator amplitude (pins 11 to 12) v 11-12 - 130 150 mv external load impedance r 12-11(ext) 0,5 - 200 k w external load impedance for no oscillation r 12-11(ext) -- 60 w ripple rejection at v p(rms) = 100 mv; f p = 100 hz (rr = 20 log [v 13-16 /v 11-16 ]) rr - 55 - db source voltage for switching diodes (6 v be )v 11-16 - 4,2 - v d.c. output current (for switching diodes) - i 11 0 - 20 ma change of output voltage at d i 11 = 20 ma (switch to maximum load) d v 11-16 - 0,5 - v buffered oscillator output d.c. output voltage v 10-16 - 0,7 - v output signal amplitude v 10-16(p-p) - 320 - mv output impedance r 10 - 170 -w output current - i 10(peak) -- 3ma i.f., a.g.c. and a.f. stages d.c. input voltage v 3-16 , v 4-16 - 2,0 - v i.f. input impedance r 3-4 2,4 3 3,9 k w c 3-4 - 7 - pf i.f. input voltage for thd = 3% at m = 80% v 3-4 - 90 - mv voltage gain before start of a.g.c. v 3-4 /v 6-16 - 68 - db a.g.c. range of i.f. stages: change of v 3-4 for 1 db change of v o(af) ; v 3-4(ref) = 75 mv d v 3-4 - 55 - db a.f. output voltage at v 3-4(if) = 50 m vv o(af) - 130 - mv a.f. output voltage at v 3-4(if) = 1 mv v o(af) - 310 - mv a.f. output impedance (pin 6) ? z o ?- 3,5 - k w indicator driver output voltage at v i = 0 mv; r l(9) = 2,7 k w v 9-16 - 20 150 mv output voltage at v i = 500 mv; r l(9) = 2,7 k w v 9-16 2,5 2,8 3,1 v load resistance r l(9) 1,5 -- k w parameter symbol min. typ. max. unit
may 1984 7 philips semiconductors product speci?cation am receiver circuit TDA1072A operating characteristics v p = 8,5 v; f i = 1 mhz; m = 30%; f m = 400 hz; t amb = 25 c; measured in fig.1; unless otherwise speci?ed standby switch switching threshold at v p = 7,5 to 18 v; t amb = - 40 to + 80 c on-voltage v 2-16 0 - 2,0 v off-voltage v 2-16 3,5 - 20 v on-current at v 2-16 = 0 v - i 2 -- 200 m a off-current at v 2-16 = 20 v ? i 2 ?-- 10 m a parameter symbol min. typ. max. unit r.f. sensitivity r.f. input required for s + n/n = 6 db v i - 1,5 -m v r.f. input required for s + n/n = 26 db v i - 15 -m v r.f. input required for s + n/n = 46 db v i - 150 -m v r.f. input at start of a.g.c. v i - 30 -m v r.f. large signal handling r.f. input at thd = 3%; m = 80% v i - 500 - mv r.f. input at thd = 3%; m = 30% v i - 700 - mv r.f. input at thd = 10%; m = 30% v i - 900 - mv a.g.c. range change of v i for 1 db change of v o(af) ; v i(ref) = 500 mv d v i - 86 - db change of v i for 6 db change of v o(af) ; v i(ref) = 500 mv d v i - 91 - db output signal a.f. output voltage at v i = 4 m v; m = 80% v o(af) - 130 - mv a.f. output voltage at v i = 1 mv v o(af) 240 310 390 mv thd at v i = 1 mv; m = 80% d tot - 0,5 - % thd at v i = 500 mv; m = 30% d tot - 1 - % signal-to-noise ratio at v i = 100 mv (s + n)/n - 58 - db ripple rejection at v i = 2 mv; v p(rms) = 100 mv; f p = 100 hz (rr = 20 log [v p /v o(af) ]) rr - 38 - db parameter symbol min. typ. max. unit
may 1984 8 philips semiconductors product speci?cation am receiver circuit TDA1072A application information unwanted signals suppression of i.f. whistles at v i = 15 m v; m = 0% related to a.f. signal of m = 30% at f i ? 2 f if a 2if - 37 - db at f i ? 3 f if a 3if - 44 - db i.f. suppression at r.f. input for symmetrical input a if - 40 - db for asymmetrical input a if - 40 - db residual oscillator signal at mixer output at f osc i 1(osc) - 1 -m a at 2 f osc i 1(2osc) - 1,1 -m a parameter symbol min. typ. max. unit fig.2 oscillator circuit using quartz crystal; centre frequency = 27 mhz. (1) capacitor values depend on crystal type. (2) coil data: 9 windings of 0,1 mm dia laminated cu wire on toko coil set 7k 199cn; q o = 80.
may 1984 9 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.3 a.f. output as a function of r.f. input in the circuit of fig.1; f i = 1 mhz; f m = 400 hz; m = 30%. fig.4 total harmonic distortion and (s + n)/n as functions of r.f. input in the circuit of fig.1; m = 30% for (s + n)/n curve and m = 80% for thd curve. fig.5 total harmonic distortion as a function of modulation frequency at v i = 5 mv; m = 80%; measured in the circuit of fig.1 with c 7-16(ext) = 0 m f and 2,2 m f.
may 1984 10 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.6 indicator driver voltage as a function of r.f. input in the circuit of fig.1. fig.7 typical frequency response curves from fig.1 showing the effect of filtering as follows: ???? with i.f. filter; - - - - - - with a.f. filter; - - - - - with i.f. and a.f. filters. fig.8 car radio application with inductive tuning.
may 1984 11 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.9 a.f. output as a function of r.f. input using the circuit of fig.8 with that of fig.1. fig.10 suppression of cross-modulation as a function of input signal, measured in the circuit of fig.8 with the input circuit as shown in fig.11. curve is for wanted v o(af) /unwanted v o(af) = 20 db; v rfw , v rfu are signals at the aerial input, v' aew , v' aeu are signals at the unloaded output of the aerial. wanted signal (v' aew , v rfw ): f i = 1 mhz; f m = 400 hz; m = 30%. unwanted signal (v' aeu , v rfu ): f i = 900 khz; f m = 400 hz; m = 30%. effective selectivity of input tuned circuit = 21 db.
may 1984 12 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.11 input circuit to show cross-modulation suppression (see fig.10). fig.12 oscillator amplitude as a function of pin 11, 12 impedance in the circuit of fig.8.
may 1984 13 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.13 total harmonic distortion and (s + n)/n as functions of r.f. input using the circuit of fig.8 with that of fig.1. fig.14 forward transfer impedance as a function of intermediate frequency for filters 1 to 4 shown in fig.15; centre frequency = 455 khz.
may 1984 14 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.15 i.f. filter variants applied to the circuit of fig.1. for filter data, refer to table 1.
may 1984 15 philips semiconductors product speci?cation am receiver circuit TDA1072A table 1 data for i.f. ?lters shown in fig.15. criterium for adjustment is z f = maximum (optimum selectivity curve at centre frequency f 0 = 455 khz). see also fig.14. * the beginning of an arrow indicates the beginning of a winding; n1 is always the inner winding, n2 the outer winding. filter no. 1 2 3 4 unit coil data l1 l1 l1 l2 l1 value of c 3900 430 3900 4700 3900 pf n1: n2 12 : 32 13 : (33 + 66) 15 : 31 29 : 29 13 : 31 diameter of cu laminated wire 0,09 0,08 0,09 0,08 0,09 mm q o 65 (typ.) 50 75 60 75 schematic* of windings (n1) (n2) toko order no. 7xns-a7523dy l7pes-a0060btg 7xns-a7518dy 7xns-a7521aih 7xns-a7519dy resonators murata type sfz455a sfz455a sfz455a sft455b d (typical value) 4 4 4 6 db r g , r l 33 3 3k w bandwidth ( - 3 db) 4,2 4,2 4,2 4,5 khz s 9khz 24 24 24 38 db filter data z i 4,8 3,8 4,2 4,8 k w q b 57 40 52 (l1) 18 (l2) 55 z f 0,70 0,67 0,68 0,68 k w bandwidth ( - 3 db) 3,6 3,8 3,6 4,0 khz s 9khz 35 31 36 42 db s 18khz 52 49 54 64 db s 27khz 63 58 66 74 db 12 32 66 13 33 15 31 29 29 13 31
may 1984 16 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.16 printed-circuit board component side, showing component layout. for circuit diagram see fig.1.
may 1984 17 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.17 printed-circuit board showing track side.
may 1984 18 philips semiconductors product speci?cation am receiver circuit TDA1072A fig.18 car radio application with capacitive diode tuning and electronic mw/lw switching. the circuit includes pre-stage a.g.c. optimized for good large-signal handling. (1) values of capacitors depend on the selected group of capacitive diodes bb112. (2) for i.f. filter and coil data refer to fig.1.
may 1984 19 philips semiconductors product speci?cation am receiver circuit TDA1072A package outline unit a max. 1 2 b 1 cee m h l references outline version european projection issue date iec jedec eiaj mm inches dimensions (inch dimensions are derived from the original mm dimensions) sot38-1 92-10-02 95-01-19 a min. a max. b max. w m e e 1 1.40 1.14 0.055 0.045 0.53 0.38 0.32 0.23 21.8 21.4 0.86 0.84 6.48 6.20 0.26 0.24 3.9 3.4 0.15 0.13 0.254 2.54 7.62 0.30 8.25 7.80 0.32 0.31 9.5 8.3 0.37 0.33 2.2 0.087 4.7 0.51 3.7 0.15 0.021 0.015 0.013 0.009 0.01 0.10 0.020 0.19 050g09 mo-001ae m h c (e ) 1 m e a l seating plane a 1 w m b 1 e d a 2 z 16 1 9 8 b e pin 1 index 0 5 10 mm scale note 1. plastic or metal protrusions of 0.25 mm maximum per side are not included. (1) (1) d (1) z dip16: plastic dual in-line package; 16 leads (300 mil); long body sot38-1
may 1984 20 philips semiconductors product speci?cation am receiver circuit TDA1072A 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 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 (t stg 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. definitions 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. data sheet status objective speci?cation this data sheet contains target or goal speci?cations for product development. preliminary speci?cation this data sheet contains preliminary data; supplementary data may be published later. product speci?cation this data sheet contains ?nal product speci?cations. 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 speci?cation 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 speci?cation.

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