SANYO LC75372E Datasheet

Ordering number : EN5330

41596HA (OT) No. 5330-1/18

Overview

The LC75372E is an electronic volume control that can
implement volume, balance, fader, bass/treble, loudness,
input switching, and input level control functions with a
minimal number of external components.

Features

• Volume: Provides 81 positions, from 0 dB to –79 dB (in

1-dB steps) and –∞. A balance function can be
implemented by controlling the left and right channels
independently.

• Fader: This function can attenuate either the rear or the
front outputs over 16 positions. (From 0 to –20 dB in
2-dB steps, from –20 to –25 dB in one 5-dB step, from
–25 to –45 dB in 10-dB steps, –60 dB, and –∞.)

• Bass/treble: Forms an NF-type tone control circuit (LUX
type) with the addition of external capacitors. The base
and treble controls each have 15 positions.

• Loudness: The volume resistor ladders are tapped
starting at the –20-dB position. A loudness function can
be implemented by adding external RC circuits at these
taps.

• The signal can be selected from one of three inputs for
each of the left and right channels. The input signals can
be amplified from 0 to +18 dB in 6-dB steps.

• On-chip buffer amplifiers for a minimum of external
components.

• Minimal switching noise due to fabrication in a silicon­gate CMOS process.

• Built-in reference voltage generation circuit

• Serial data input: Supports CCB format communication
with the system controller.

Package Dimensions

unit: mm

3148-QFP44MA

SANYO: QIP44MA

[LC75372E]

LC75372E

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN

Electronic Volume Control

for Car Stereo Systems

CMOS LSI

• 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.

Specifications

Absolute Maximum Ratings at Ta = 25°C, VSS= 0 V

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

DD

max V

DD

11 V

Maximum input voltage V

IN

max CL, DI, CE, LIN, RIN, LFIN, RFIN, L1 to L3, R1 to R3 VSS– 0.3 to VDD+ 0.3 V
Allowable power dissipation Pd max Ta ≤ 85°C 260 mW
Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –50 to +125 °C

Allowable Operating Ranges at Ta = 25°C, VSS= 0 V

Electrical Characteristics at Ta = 25°C, VDD= 9 V, VSS= 0 V

No. 5330-2/18

LC75372E

Parameter Symbol Conditions min typ max Unit

Supply voltage V

DD

V

DD

6.0 10.0 V

Input high-level voltage V

IH

CL, DI, CE 4.0 V

DD

V

Input low-level voltage V

IL

CL, DI, CE V

SS

1.0 V

Input voltage amplitude V

IN

CL, DI, CE, LIN, RIN, LFIN, RFIN, L1 to L3, R1 to R3 V

SS

V

DD

Vp-p

Input pulse width t

øW

CL 1 µs
Setup time tsetup CL, DI, CE 1 µs
Hold time thold CL, DI, CE 1 µs
Operating frequency fopg CL 500 kHz

Parameter Symbol Conditions min typ max Unit
[Input Block]
Input resistance Rin L1 to L3, R1 to R3 30 50 70 kΩ
Minimum input gain Gin min –2 0 +2 dB
Maximum input gain Gin max +16.0 +18.0 +20.0 dB
Step resolution Gstep +6.0 dB
[Volume Control Block]

Input resistance

Rv10 L10dBIN, R10dBIN: 10-dB steps, loudness off 30 50 70 kΩ

Rv1 LIN, RIN: 1-dB steps 12 20 28 kΩ

Step resolution ATstep 1 dB

Step error ATerr

step = 0 to –20 dB –1 0 +1 dB

step = –20 to –50 dB –3 0 +3 dB
[Fader Volume Block]
Input resistance Rfed LFIN, RFIN 12 20 28 kΩ

step = 0 to –20 dB 2 dB
Step resolution ATstep step = –20 to –25 dB 5 dB

step = –25 to –45 dB 10 dB

Step error ATerr

step = 0 to –45 dB –2 0 +2 dB

step = –45 to –60 dB –3 0 +3 dB
Output load resistance R

L

LFOUT, LROUT, RFOUT, RROUT 10 kΩ
[Bass/Treble Control Block]
Bass control range Gbass Max. boost/cut ±9 ±10.5 ±12 dB
Treble control range Gtre Max. boost/cut ±8 ±10.5 ±13 dB
[Overall Characteristics]

Total harmonic distortion

THD (1) V

IN

= 1 Vrms, f = 1 kHz, all settings flat overall 0.045 %

THD (2) V

IN

= 1 Vrms, f = 20 kHz, all settings flat overall 0.040 %

Crosstalk CT

V

IN

= 1 Vrms, f = 1 kHz, all settings flat overall,

80 dB

Rg = 1 kΩ

Output at maximum attenuation V

O

min

V

IN

= 1 Vrms, f = 1 kHz, main volume at –∞ –78 dB

V

IN

= 1 Vrms, f = 1 kHz, main volume at –∞, INMUTE –81 dB

Output noise voltage

V

N

(1) All settings flat overall (IHF-A), Rg = 1 kΩ 15 30 µV

V

N

(2) All settings flat overall (DIN-AUDIO), Rg = 1 kΩ 20 40 µV

Current drain I

DD

VDD– VSS= 10 V 25 30 mA
Input high-level current I

IH

CL, DI, CE: VIN= 9 V 10 µA
Input low-level current I

IL

CL, DI, CE: VIN= 0 V –10 µA
Maximum input level V

CL

All settings flat overall, measurement point; fader output

2 Vrms

THD = 1%, RL = 10 KΩ

Equivalent Circuit Block Diagram and Sample Application Circuit

No. 5330-3/18

LC75372E

Electrical Characteristics Test Circuits

1. Total harmonic distortion

No. 5330-4/18

LC75372E

2. Output noise voltage

No. 5330-5/18

LC75372E

3. Crosstalk

No. 5330-6/18

LC75372E