lc75410e

Manufacturer Part Numberlc75410e
DescriptionElectronic Volume Controller For Car Audio Systems
ManufacturerSanyo Semiconductor Corporation
lc75410e datasheet
 


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Ordering number : ENN7027
Overview
The LC75410E and 75410W are electronic volume
controllers that enable control of volume, balance, fader,
bass/treble/mid, 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/mid: Each band 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: five input signals can be selected for
Left and for Right (Four are single-
ended inputs and one is a differential
input.)
• 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
LC75410E, 75410W
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)
O1901RM (OT) No. 7027-1/28
CMOS IC

lc75410e Summary of contents

  • Page 1

    ... Ordering number : ENN7027 Overview The LC75410E and 75410W are electronic volume controllers that enable control of volume, balance, fader, bass/treble/mid, 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 48 47 L5P 49 L5M LVref 55 VDD 56 Vref 57 RVref R5M 63 R5P LC75410E, 75410W unit: mm 3190-SQFP64 0. 0.1 2.7 0.8 SANYO: QIP64E LC75410E LC75410W [LC75410W] 12.0 10.0 1.25 0.5 ...

  • Page 3

    ... Equivalent Circuit Block Diagram/Sample Application Circuit LVref LTOUT LF3C3 LF3C2 LF3C1 LF2C3 LF2C2 LF2C1 LF1C3 LF1C2 LF1C1 LTIN 10 F LVROUT 0.1 F LCOM 4. LCT 68k LVRIN LSELO LC75410E, 75410W 1M 47k LVref RVref RVref LVref + RVref RTOUT RF3C3 0.001 F RF3C2 0.001 F RF3C1 RF2C3 0.01 F RF2C2 0.01 F RF2C1 RF1C3 0.1 F RF1C2 ...

  • Page 4

    ... ATerr L/R balance BAL [Tone block] Step setting error ATerr Bass control range Gbass Mid control range Gmid Treble control range Gtre L/R balance BAL LC75410E, 75410W = Symbol Conditions V max max All input pins IN Ta ≤ 85°C, when mounted on board ...

  • Page 5

    ... V CL Common-mode rejection ratio CMRR Control Timing and Data Format To control the LC75410E and LC75410W 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 6

    ... Address code (B0 to A3) The LC75410E and 75410W 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 7

    ... LC75410E, 75410W D12 D13 D14 D15 0dB –0.5dB –1dB –1.5dB –2dB – ...

  • Page 8

    ... LC75410E, 75410W D12 D13 D14 D15 –21dB –21.5dB –22dB –22.5dB –23dB – ...

  • Page 9

    ... LC75410E, 75410W D12 D13 D14 D15 –41dB –41.5dB –42dB –42.5dB –43dB – ...

  • Page 10

    ... LC75410E, 75410W D12 D13 D14 D15 –60dB –60.5dB –61dB –61.5dB –62dB – ...

  • Page 11

    ... Channel Selection Control D32 D33 0 0 L/R simultaneously, Initial setting mode 1 0 RCH 0 1 LCH 1 1 L/R simultaneously LC75410E, 75410W D40 f1 band D41 f2 band D42 f3 band 0 +12dB 0 +10dB 0 +8dB 0 +6dB 1 +5dB 0 +4dB 1 +3dB 0 +2dB 1 +1dB 0 ...

  • Page 12

    ... 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. LC75410E, 75410W Setting Setting No. 7027-12/28 ...

  • Page 13

    ... RC between LCT (RCT) and GND. • 2-dB stop volume output pins. LCOM 45 • To reduce switching noise, each of these pins should be RCOM 4 connected to Vref through a capacitor. LVROUT 44 • 0.5-dB step volume output pin RVROUT 5 LC75410E, 75410W Function Equivalent circuit VDD LVref RVref VDD M VDD P LVref RVref VDD ...

  • Page 14

    ... Connect a capacitor of a few tens of µF between Vref and AVSS (VSS 0.55 VDD voltage generator, current ripple Vref 57 countermeasure. LVref 55 • Internal analog system ground pins. RVref 58 LC75410E, 75410W Function Equivalent circuit VDD LVref RVref VDD VDD TIN Vref VDD ...

  • Page 15

    ... CE 24 Data transfer is enabled when the level is High. • Dedicated IC test pin. TEST 28 • Normally this pin is used connected to GND • No Connect pin. LC75410E, 75410W Function level sets forcibly fader volume block to SS Equivalent circuit VDD VDD VDD VDD No. 7027-15/28 ...

  • Page 16

    ... Selector Block Equivalent Circuit Block Diagram R3=22.65k L5P R4=25k LVref L5M R1=22.65k L4 LVref L3 LVref L2 LVref L1 LVref Total resistance Same for right channel Unit (Resistance: ) LC75410E, 75410W + - 0dB 1.25dB R2=25k 2.50dB 3.75dB 50k 5.00dB 6.25dB 50k 7.50dB 8.75dB 50k 10.0dB 11.25dB 50k 12 ...

  • Page 17

    ... Volume Block Equivalent Circuit Block Diagram LVRIN Total resistance of 195 k over tap LCT 5.750k Total resistance of 30.847 k under tap LC75410E, 75410W 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 –18dB 5.179k – ...

  • Page 18

    ... Volume Block Equivalent Circuit Block Diagram From left channel 2-dB block Initial setting switch LC75410E, 75410W 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. 7027-18/28 ...

  • Page 19

    ... LF1C2 LF1C3 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. LC75410E, 75410W SW3 SW2 SW1 0.027k SW4 12dB 3.373k 10dB 4 ...

  • Page 20

    ... LOG – G/20 –1 2. Calculate C with the center frequency kHz (R1+R2)R3C1C2 (R1+R2) Calculate Q: 1 R3(R1+R2 (2R3+R1) (R1+R2)R3 LC75410E, 75410W 2R3+ 0.010 10 1000 38888 6500 1.22 –6 0.01 F No. 7027-20/28 ...

  • Page 21

    ... LVref When – data is sent to the main volume, S1 and S2 become open, and S3 and S4 simultaneously become ON. LC75410E, 75410W 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 22

    ... 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 LC75410E and 75410W 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 23

    ... The data format of the LC75410E and 75410W 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 24

    ... Main Volume Control Step Characteristics 0 LC75410E -- =0dBV IN --20 Input L1 Output LFOUT --30 f=1kHz --40 --50 --60 --70 --80 --90 --100 -- --70 --60 --50 --40 --30 Step setting — dB LC75410E, 75410W 20 LC75410W V = =–30dBV IN 16 Input L1 Output LFOUT 14 f=1kHz ILC05428 V ...

  • Page 25

    ... V =0dBV --10dBV 0.001 100 1k Frequency, f — Hz LC75410E, 75410W Fader Volume Control Step Characteristics 0 LC75410W V =9V =0dBV IN --20 Input L1 Output LFOUT --30 f=1kHz --40 --50 --60 --70 --80 --90 --100 -- --20 --10 0 ILC05432 V 1.0 ...

  • Page 26

    ... THD — Supply Voltage Characteristics 1.0 LC75410E Input L1 3 Output LFOUT 2 80kHz LPF 0 0. 0.001 Supply voltage — V LC75410E, 75410W 1 0 0.01 LC75410W 80kHz LPF 3 Input L1, Output LFOUT 2 With VR=0dB 0.001 -- --40 --35 ILC05436 ...

  • Page 27

    ... Input: L1, Output: LFOUT DD IN For settings from 0 to – steps) 0 --10 --20 --30 --40 --50 -- 100 1k 10k Frequency, f — Hz LC75410E, 75410W 0 =9V DD --5 =–20dBV IN --10 --15 --20 --25 --30 --35 -- 100k 10 ILC05440 0 ...

  • Page 28

    ... 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 October, 2001. Specifications and information herein are subject to change without notice. LC75410E, 75410W ...