lc75411es

Manufacturer Part Numberlc75411es
DescriptionElectronic Volume Controller For Car Audio Systems
ManufacturerSanyo Semiconductor Corporation
lc75411es datasheet
 
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Ordering number : ENN6928
Overview
The LC75411ES and 75411WS are electronic volume
controllers that enable control of volume, balance, fader,
bass/treble, loudness, input switching, and input gain
using only a small number of external components.
Functions
• Volume: 0 dB to –79.5 dB in 0.5-dB steps, and –∞ (161
positions) Balance function with separate L/R
control
• Fader: rear output or front output can be attenuated
across 16 positions (in 1-dB steps from 0 dB to
–2 dB, 2-dB steps from –2 dB to 20 dB, 10-dB
steps from –20 dB to –30 dB, and –45 dB,
–60 dB, –∞)
• Bass/treble: Both bass and treble can be controlled in
1-dB steps from 0 dB to ±6 dB, and in 2-dB
steps from ±8 dB to ±12 dB.
• Input gain: 0 dB to +18.75 dB (1.25-dB steps)
amplification is possible for the input signal.
• Input switching: four input signals can be selected for
Left and for Right
• Loudness: A tap is output from the –32 dB position of a
2 dB step volume control resistor ladder.
A loudness function can be implemented by
connecting an external RC circuit.
• CCB is a trademark of SANYO ELECTRIC CO., LTD.
• CCB is SANYO’s original bus format and all the bus
addresses are controlled by SANYO.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
LC75411ES, 75411WS
Electronic Volume Controller
for Car Audio Systems
Features
• On-chip buffer amplifier cuts down number of external
components
• Low switching noise generated by on-chip switch
through use of silicon gate CMOS process, for low
switching noise when there is no signal
• Low switching noise when there is a signal due to use
of on-chip zero-cross switching circuit
• On-chip 1/2 VDD reference voltage circuit
• Controls performed with serial input (CCB)
62901RM (OT) No. 6928-1/34
CMOS IC

lc75411es Summary of contents

  • Page 1

    ... Ordering number : ENN6928 Overview The LC75411ES and 75411WS are electronic volume controllers that enable control of volume, balance, fader, bass/treble, loudness, input switching, and input gain using only a small number of external components. Functions • Volume –79 0.5-dB steps, and –∞ (161 ...

  • Page 2

    ... Pin Assignment [LC75411ES] 33 LSELO VDD 39 Vref LC75411ES, 75411WS unit: mm 3163A-SQFP48 1.6 0.2 0.1 2.5 0.8 SANYO: QIP44MA LC75411ES [LC75411WS] 9.0 7.0 0.75 0.5 0.18 0.75 0. 0.5 0.5 SANYO: SQFP48 ...

  • Page 3

    ... Equivalent Circuit Block Diagram [LC75411ES] LVref LTOUT 2700pF LF3C1 LF1C3 0.1 F LF1C2 0.1 F LF1C1 LTIN 10 F LVROUT LCOM 10 F LCT 68k LVRIN LSELO LC75411ES, 75411WS Microcontroller LVref RVref RVref RTOUT 2700pF RF3C1 RF1C3 0.1 F RF1C2 0.1 F RF1C1 RTIN 10 F RVROUT RCOM 10 F RCT 68k RVRIN RSELO No ...

  • Page 4

    ... VDD VDD Vref 220pF 68k 4.7k 0.1 F LC75411ES, 75411WS 2700pF 0 LC75411ES 0 2700pF LFOUT ...

  • Page 5

    ... Pin Assignment [LC75411WS VDD 42 Vref LC75411ES, 75411WS LC75411WS LFIN 24 LFOUT 23 LROUT 22 VSS TEST 17 TIM 16 RROUT 15 RFOUT 14 RFIN 13 10 ...

  • Page 6

    ... Equivalent Circuit Block Diagram [LC75411WS] LVref NC LTOUT LF3C1 2700pF LF1C3 0.1 F LF1C2 0.1 F LF1C1 LTIN 10 F LVROUT LCOM 10 F LCT 68k LVRIN LSELO LC75411ES, 75411WS Microcontroller RVref LVref RVref NC RTOUT RF3C1 2700pF RF1C3 0.1 F RF1C2 0.1 F RF1C1 RTIN 10 F RVROUT RCOM 10 F RCT 68k RVRIN RSELO No ...

  • Page 7

    ... VDD VDD Vref 220pF 68k 4.7k 0.1 F LC75411ES, 75411WS 2700pF 0 LC75411WS 0 2700pF LFIN ...

  • Page 8

    ... Rvr Step setting error ATerr L/R balance BAL [Tone block] Step setting error ATerr Bass control range Gbass Treble control range Gtre L/R balance BAL LC75411ES, 75411WS = Symbol Conditions V max max All input pins IN Ta ≤ 85°C, when mounted on board ...

  • Page 9

    ... I IL Maximum input voltage V CL Control Timing and Data Format To control the LC75411ES and LC75411WS input specified serial data to the CE, CL, and DI pins. The data configuration consists of a total of 52 bits broken down into 8 address bits and 44 data bits ...

  • Page 10

    ... Address code (B0 to A3) The LC75411ES and 75411WS use 8-bit address code and can be used in common with ICs that support SANYO’s CCB serial bus. Address Code (LSB Control code allocation Input Switching Control Setting (R1) ...

  • Page 11

    ... LC75411ES, 75411WS D12 D13 D14 D15 0dB –0.5dB –1dB –1.5dB –2dB – ...

  • Page 12

    ... LC75411ES, 75411WS D12 D13 D14 D15 –21dB –21.5dB –22dB –22.5dB –23dB – ...

  • Page 13

    ... LC75411ES, 75411WS D12 D13 D14 D15 –41dB –41.5dB –42dB –42.5dB –43dB – ...

  • Page 14

    ... LC75411ES, 75411WS D12 D13 D14 D15 –60dB –60.5dB –61dB –61.5dB –62dB – ...

  • Page 15

    ... Channel Selection Control D32 D33 0 0 Initial setting mode: Rapid charging 1 0 RCH 0 1 LCH 1 1 L/R simultaneously LC75411ES, 75411WS D40 Bass D42 Treble 0 +12dB 0 +10dB 0 +8dB 0 +6dB 1 +5dB 0 +4dB 1 +3dB 0 +2dB 1 +1dB 0 0dB 1 – ...

  • Page 16

    ... Data write through zero-cross detection 1 1 Zero-cross detection stopped (data write at falling edge of CE) Zero-Cross Signal Detection Block Control D38 D39 0 0 Selector 1 0 Volume 0 1 Tone 1 1 Fader Test Mode Control D43 Setting 0 For IC testing. Always set to 0. LC75411ES, 75411WS Setting Setting No. 6928-16/33 ...

  • Page 17

    ... LVROUT 30 32 • 0.5-dB step volume output pin RVROUT 5 5 LTIN 29 31 • Equalizer input pin RTIN 6 6 LC75411ES, 75411WS Function Equivalent circuit VDD LVref RVref VDD VDD LVref RVref VDD VDD VDD VDD Lvref RVref Continued on next page. ...

  • Page 18

    ... Connect a capacitor of a few tens of µF between Vref 40 43 Vref and VSS as a 0.55 VDD voltage generator, current ripple countermeasure. LC75411ES, 75411WS Function Connect capacitor between LF1C1 (RF1C1) and LF1C2 (RF1C2) LF1C2 (RF1C2) and LF1C3 (RF1C3) Connect high-pass compensation capacitor between LF3C1 (RF3C1) and VSS. ...

  • Page 19

    ... No Connect pin. Leave this pin open or connect — LC75411ES, 75411WS Function Forcibly set data when there is no zero-cross signal, from the time the data is set until the timer ends. Data transfer is enabled when the level is High Equivalent circuit ...

  • Page 20

    ... Internal Equivalent Circuit Block Diagram Selector Block Equivalent Circuit Block Diagram L4 LVref L3 LVref L2 LVref L1 LVref Total resistance Same for right channel Unit (Resistance: ) LC75411ES, 75411WS 50k 0dB 1.25dB 50k 2.50dB 3.75dB 50k 5.00dB 6.25dB 50k 7.50dB INMUTE SW 8.75dB 10.0dB LVref 11 ...

  • Page 21

    ... Volume Block Equivalent Circuit Block Diagram LVRIN Total resistance of 195 k over tap Initial setting switch LCT 5.750k Total resistance of 30.847 k under tap LC75411ES, 75411WS 0dB 41.139k –2dB 32.678k –4dB 25.957k –6dB 20.618k –8dB 16.378k –10dB 13.009k –12dB 10.334k –14dB 8.208k –16dB 6.520k – ...

  • Page 22

    ... Volume Block Equivalent Circuit Block Diagram From left channel 2-dB block Initial setting switch LC75411ES, 75411WS 0dB 2.797k –0.5dB 2.640k –1dB 2.493k –1.5dB 42.070k – dB Initial setting switch LCOM LVROUT Unit: Total resistance Same for right channel Vref No. 6928-22/33 ...

  • Page 23

    ... LF1C2 LF1C1 Unit: Total resistance: 38.861 k Same for right channel During boost and SW 3 are ON, during cut SW 2 and SW 4 are ON, and when 0 dB and SW 2 and SW 3 are ON. LC75411ES, 75411WS SW3 SW4 12.840k 12dB 10dB 8dB 6dB ...

  • Page 24

    ... Let us use 38.861 kΩ 6.5 kΩ (assuming during maximum boost) , and obtain C from mean frequency f0 = 100 Hz, as follows R3R2C1C2 R3R2 2 100 2. We obtain Q as follows. R3R2 1.223 2 R3 R3R2 LC75411ES, 75411WS 0.1 F 38861 6500 No. 6928-24/33 ...

  • Page 25

    ... Let us use R1 = 12.840 kΩ and R2 = 38.861 kΩ The above constants are inserted in the following formula LOG – – 38861 2 26000 . 3 981 – 1 LC75411ES, 75411WS 2700(pF – 12840 No. 6928-25/33 ...

  • Page 26

    ... LVref When – data is sent to the main volume 0.5dBSTEP, S1 and S2 become open, and S3 and S4 simultaneously become ON. LC75411ES, 75411WS S1 0dB S2 –1dB S3 –2dB S4 –4dB –6dB –8dB When FADER = "1", S2 and S3 are ON. When FADER = "0", S1 and S4 are ON. ...

  • Page 27

    ... At power ON, initial setting data must be sent once in order to stabilize the bias of each block in a short time. (2) Description of zero-cross switching circuit operation The LC75411ES and 75411WS have a function to switch zero-cross comparator signal detection locations, enabling the selection of the optimum detection location for blocks whose data updated. Basically, the switching noise can be minimized by inputting the signal immediately following the block whose data updated to the zero- cross comparator necessary to switch the detection location every time ...

  • Page 28

    ... The data format of the LC75411ES and 75411WS uses 8-bit addresses and 44-bit data. When sending data using multiples of 8 (when sending 48 bits), use the method described in Figure 1. ...

  • Page 29

    ... Output LFOUT f=1kHz Step setting — dB Main Volume Control Step Characteristics LC75411ES V = f=1kHz Input L1 Output LFOUT Step setting — dB LC75411ES, 75411WS Gain Step Characteristics LC75411WS V = =–30dBV IN Input L1 Output LFOUT f=1kHz Main Volume Control Step Characteristics LC75411WS V ...

  • Page 30

    ... IN Input L1 Output LFOUT f=1kHz Step setting — dB THD — Frequency Characteristics LC75411ES V DD Input L1 Output LFOUT 80kHz LPF Frequency, f — dB METER LC75411ES, 75411WS Fader Volume Control Step Characteristics LC75411WS V = =0dBV IN Input L1 Output LFOUT f=1kHz THD — Frequency Characteristics =9V THD Step setting — ...

  • Page 31

    ... LC75411ES, 75411WS THD — Input Level Characteristics LC75411ES V =9V DD 80kHz LPF Input L1, Output LFOUT With MV=0dB Input level — dBV METER THD — Supply Voltage Characteristics LC75411ES 80kHz LPF Input L1 Output LFOUT Supply voltage — V METER THD — Input Level Characteristics ...

  • Page 32

    ... Output Level Control Characteristics V =9V MV=0 to –54dB Frequency, f — Hz Loudness Control Characteristics V =9V, V =0, Input=L1, Output=LFOUT DD IN Loudness On, MV=0 to –54dB Frequency, f — Hz LC75411ES, 75411WS Bass Control Characteristics Treble Control Characteristics LC75411WS V = =–20dBV IN Input L1 Output LFOUT Output Level Control Characteristics =0 ...

  • Page 33

    ... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of June, 2001. Specifications and information herein are subject to change without notice. LC75411ES, 75411WS PS No. 6928-33/33 ...