LM1036 | DigiCamel IC Datasheet

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3 . Ss =| 77 National Semiconductor F = | LM1035/LM1036 Dual DC Operated Tone/Volume/Balance Circuits General Description Features ‘The LM1035/LM1036 is a DC controlled tone (bass/treble), | ™ Wide supply voltage range, BV to 18V. volume and balance circuit for stereo applications in carra- ™ Large volume control range, 75 dB typical dio, TV and audio systems. An additional control input al- = Tone control, +15 dB typical lows loudness compensation to be simply effected. = Channel separation, 75 dB typical Four control inputs provide contro! of the bass, treble, bal- = Low distortion, 0.06% typical for an input level of ance and volume functions through application of DC volt- 1 Ves (0.3 Vrms for LM1036) ‘ages from a remote control system or, alternatively, from — @ High signal to noise, 80 dB typical for an input level of four potentiometers which may be biased from a zener regu- 1 Vrms (0.3 Vrms for LM1036) lated supply provided on the circuit. = Few external components required Each tone response is defined by a single capacitor chosen to give the desired characteristic. Block and Connection Diagram Dual-in-Line Package INTERNAL SUPPLY DECOUPLE: a OY a} GND Seed ciicee ‘tage | TREBLE CAPACITOR 1 — Ta] =a > TREBLE CAPACITOR 2 ‘AC BYPASS 1 4 | I LS AC BYPASS 2 BASS CAPACITOR 1 u a BASS CAPACITOR 2 LOUDNESS COMPENSATION _7 4 CONTROL INPUT E - | BASS CONTROL INPUT wn a HSH wer BALANCE CONTROL INPUT 2 ye VOLUME CONTROL INPUT eno 10) ul vee ‘TOP VIEW Tuwssiae-s Order Number LM1035N or LM1036N ‘See NS Package Number N20A 1-90

e Absolute Maximum Ratings = If Military/Aerospace specified devices are required, Operating Temperature Range OC to + 70°C 3 please contact the National Semiconductor Sales ‘Storage Temperature Range -escto +1500 |S Otic /osrbutors for availability and specifications. Power Dissipation wile Supply Voltage 3 P0386 tev Lead Temp. (Soldering, 10 seconds) zrc 15 LM1035 20V o Control Pin Voltage (Pins 4, 7, 9, 12, 14) Voc Electrical Characteristics vco=12v, T,= 25°C (unless otherwise stated) Parameter [|____conaitions [win [typ [Max | Unite Supply Voltage Range [ miss [oo | fT we Tv [moss [os | [| ow fv Supply Current a ec Zener Regulated Output Pin 17 Voltage v Current mA Maximum Output Voltage Pins 8, 13; f= 1 kHz LM1036 Voo=8V, Maximum Gain 0) Vims Voc=12V 1.0 Vrms Maximum Output Voltage Pins 8, 13; f=1 kHz LM1035 Voc=8V Vrms Voc=12V Vrms. Voc=18V Vis Maximum input Voltage Pins 2, 19; f= 1 kHz, Voo= 8V Vrms LM1036 (Note 1) Flat Response, Voo=12V Vers Gain= - 1048 Maximum Input Voltage Pins 2, 19; f= 1 kHz Vrms LM1035 (Note 1) Flat Response Input Resistance | Pinszieit-tune [ao | ao ka Output Resistance | Pinseraterie PT oT | Maximum Gain (Pin 42)=V(Pin 17); 4B f=1kHz Volume Control Range [ tmioss [70 | vs | [ mwas [7 | oo | a Gain Tracking f= 1 kHz Channel 1-Channel 2 0 dB through —40 dB dB ~40 dB through ~60 dB 8 Balance Control Range Pins 8, 13; f= 1 kHz 48 Bass Control Range 140 Hz, Cp 0.39 nF (Note 2) (Pin 14) = V(Pin 17) 12 18 4B V(Pin 14) =0V ~12 —18 dB Treble Control Range f= 16 kHz, Cy, =0.01 pF (Note 2) Vein 4)=ViPin 17) 18 B (Pin 4)=0V -18 dB Total Harmonic Distortion 1=1 kHz, Vin=0.3 Vems M1036 Gain=0dB 0.06 % Gain= -30dB 0.03 % Total Harmonic Distortion f=1 kHz, Vin= 1 Vrms. % M1035 Maximum Gain 1-91

8 Electrical Characteristics voo=12v, T,=25°C (unless otherwise stated) (Continued)

20 Hz—16 kHz)

‘Note 1; The maximum permissible input level is dependent on tone and volume settings. See Application Notes. Note 2: The tone control range is defined by capacitors Cp and Cy. See Application Notes. Note 3: Gaussian noise, moasured over a period of 50 ms por channel, with a COIR iter referenced to 2 kHz and an averago-responding moter. 1-92

Typical Performance Characteristics & F Volume Control Balance Control 5 Characteristics Characteristic Tone Control Characteristic 3 : aa ‘ooo - 2 [TTY Kr A] ” a “ EN : Saude j. LA fo 7 e.LiTy 7 [] aya ee ee Yriit} 3 vot {A a HEC] A Leitoue | | err aa se ot 2 3 4 8 6 Oo 1 2 3 4 8 6 V12 — CONTROL VOLTAGE (V)_ VO — CONTROL VOLTAGE (¥) ¥4OR ¥14—CONTROL VOLTAGE (¥) Tone Characteristic (Gain Tone Characteristic (Gain Loudness Compensated vs Frequency) vs Frequency) Volume Characteristic * » * om ins COTO Co ‘ tees oN Yo Ser s4HNot = ttt ft}. EERO = Nv iti of 458) iad i ? 3 rete i *lesags So og-w NONE {ie ST fee AAT -0 Dy ~10 \\t ~ 7 P20) -.20S Ais es eee ae 3Lu TT} CEE rr) ne Lem emenceed pre] | _ «ee om rer : 2. man acne rua Input Signal Handling vs Channel Separation vs i 2 ‘Supply Voltage - THD vs Gain Frequency su few™ TTITI " Be “AN Ao mm Pe CNC) ECE pe aC NSC) Pecos Suae Avene zat LITT] ¢,LUTi yy ac eee ee ee ORME a aL Lane ang | SUPPLY VOLTAGE (V) GAM (48), FREQUENCY (Hz) Loudness Control Output Noise Voltage Characteristic vs Gain—LM1036 THD vs Input Voltage—LM 1036 3 = a {Teel =a | =" Bey geet TT gy LTT] oa fein ar ) No eNO gs ee er PSCONS GTR HA ‘COORG oe Nepc) eT : 2 |S weCELLEELL LETT LL ete eer VI—CONTROL VOLTAGE (¥) GAM (08) INPUT VOLTAGE (Vrms) 1-93

= Typical Performance Characteristics (continued) a

5 Output Noise Voltage

3 vs Gain—LM1035 ‘THD vs Input Voltage—LM1035 0 050 5) pe ee [TTT Feiesey TT cT FREQUENCY f

5 AC See wo mle |

2 SONNET a Lee

“CONS ny 250 g SCONE oa! Ye 3) Taser SSS WZ esc 0011 Fa recur sso B10 La at NSE o LLL! TTT | LL | eaancen, cans ° 20 40 60 "80 02 07 15 175 25 GAIN (48) INPUT VOLTAGE (Vrms) Tuwisi42-20 TuMys142-21 Application Notes TONE RESPONSE LOUDNESS COMPENSATION The maximum boost and cut can be optimized for individual ‘A simple loudness compensation may be effected by apply- applications by selection of the appropriate values of C; (tre- ing a DC control voltage to pin 7. This operates on the tone ble) and Cp (bass). control stages to produce an additional boost limited by the The tone responses are defined by the relationships: maximum boost defined by Cp and C;. There is no loudness 0.00065(1 — ay compensation when pin 7 is connected to pin 17. Pin 7 can os be connected to pin 12 to give the loudness compensated Bass Response = ———/#Co_ volume characteristic as illustrated without the addition of 4 4 9.00085» further external components. (Tone settings are for flat re- joCy ‘sponse, Cp and C; as given in Application Circuit.) Modifica- tion to the loudness characteristic is possible by changing _ the capacitors Cp and C; for a different basic response or, Treble Response = 1*/#5500(1 — aC by a resistor network between pins 7 and 12 for a different 1+ }w5500a,C threshold and slope. Where ap =a1=0 for maximum bass and treble boost re- spectively and ap =a,=1 for maximum cut. Sanat HANDLING For the values of 39 pF 01 pF 'e volume control function of the LM1036 is carried out in chown into Aoplcston Goa 18 0 of boost orcas "MO stages, conte by the DC vaage on pin 12 fm obtained at 40 Hz and 16 kHz. prove signal handling capability and provide a reduction of output noise level at reduced gain. The first stage is before ZENER VOLTAGE the tone control processing and provides an initial 15 dB of ‘A zener voltage (pin 17=5.4V) is provided which may be gain reduction, so ensuring that the tone sections are not used to bias the control potentiometers. Setting a DC level ‘overdriven by large input levels when operating with a low of one half of the zener voltage on the control inputs, pins 4, volume setting. Any combination of tone and volume set- 9, and 14, resuits in the balanced gain and flat response tings may be used provided the output level does not ex- condition. Typical spread on the zener voltage is +100 mV ceed 1 Vims, Voc= 12V (0.8 Vrms, Voc = 9V). At reduced and this must be taken into account if control signals are gain (< ~6 dB) the input stage will overload if the input level used which are not referenced to the zener voltage. If this is exceeds 1.6 Vrms, Voc=12V (1.1 Vrms, Voo=9V). As the case, then they will need to be derived with similar accu- there is volume control on the input stages, the inputs may racy. be operated with @ lower overload margin than would other- wise be acceptable, allowing a possible improvement in sig- nal to noise ratio. 1-94

wird A La, are | saLance conrno. there may be requirements for responses different to those affect the lower frequencies in 'S response Curves.

3 Coy 2 on PEA IN

FIGURE 1. Tone Characteristic (Gain vs Frequency)

J ferent C; and Cp values may be mixed if it is required to give suitable tone contro! range and response shape. to reduce high frequence noise. ‘components. Modified response curves is shown in Figure 6. The input voltage ranges. Itwill be seen from Figures 2 and 3 that modifying C; and Cp, =0.39 uF).

0 Seg teu conrnor nce |] $4 3 « SENT a

FIGURE 4. Tone Characteristic (Gain vs Frequency) FIGURE 5. Tone Characteristic (Gain vs Frequency) FIGURE 6. Tone Characteristic (Gain vs Frequency) FIGURE 7. Loudness Comp’

the voltage applied to pin 7 towards the control reference rate of change may be readily modified.

0 ELIT TTT TT 10 Pettit TT

FIGURE 10. Loudness Compensated Volume FIGURE 11. Loudness Compensated Volume FIGURE 12. Loudness Compensated Volume Characteristic

The resulting responses are given in Figure 14 showing a ure TP Ogee ad

boost previously applied. r= 0.001 pF.

1 Cg 20

FIGURE 13. Modified Application Circult for Additional Bass Boost with Loudness Control FIGURE 14. Loudness Compensated Volume FIGURE 15. Tone Characteristic (Gain vs Frequency)

Product Information

LM1036 specifications and overview.

Summary

DUAL DC OPERATED TONE/VOLUME BALANCE CIRCUITS

Description

DUAL DC OPERATED TONE/VOLUME BALANCE CIRCUITS

Source title LM1036 Datasheet(PDF) - National Semiconductor (TI)

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