SANYO LA2650 Datasheet

Ordering number : EN5652

43097HA(OT) No. 5652-1/13

Overview

The LA2650 is a bass boost IC developed for use in mini­component stereo systems, TV sets, and radio/cassette
player products. The cutoff frequency is determined by
external capacitors, and the boost gain, addition level, and
boost on/off state can be controlled by a microcontroller.

Features

• The bass boost gain is variable over a maximum range
of 20 to 35 dB in 5-dB steps, and the addition level into
the left and right channels can be controlled over a 0 to
–35 dB range in 3-dB and 5-dB steps. This allows an
optimal boost for the source and volume to be acquired
using microprocessor control.

• Includes two AGC circuits on chip: a level limiter (2 V
rms) for the maximum input in low-frequency boost
mode and a non-clipping limiter (i.e. clip prevention)
circuit.

• Can be switched between 2D and 3D systems.

Functions

• Variable boost gain (20, 25, 30, and 35 dB)

• Boost level limiter, non-clipping limiter

• Variable boost addition level (0, –3, –6, –9, –15, –20,
–25, and –35 dB)

• Left and right channel boost addition on/off

• Bass output pin for use in 3D systems

• Boost on/off

• LED on/off

• 8-bit serial microprocessor interface

Package Dimension

unit: mm

3021B-DIP20

SANYO: DIP20

[LA2650]

LA2650

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

Bass Boost IC

Monolithic Linear IC

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

CC

max 12 V
Allowable power dissipation Pd max Ta ≤ 70°C 450 mW
Operating temperature Topr –25 to +70 °C
Storage temperature Tstg –40 to +150 °C

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

CC

9V

Operating voltage range V

CC

op 5 to 10 V

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Low-level voltage V

IL

0 to 1.5 V

High-level voltage V

IH

3.5 to *5.5 V

Control Data Input Voltage Levels

Note: When VCCis under 5.7 V, the maximum value shall be VCC– 0.2 V.

No. 5652-2/13

LA2650

Parameter Symbol Conditions

Ratings

Unit

min typ max

Quiescent current

I

CCO

T Boost: off 5 8 13 mA

I

CCO

B Boost: on 6 9 14 mA

Voltage gain

VGT V

IN

= 0 dBm, Boost: off –2 0 +2 dB

VGB V

IN

= 0 dBm, Boost: on –2 0 +2 dB

BST1

Boost: on, f

i

= 50 Hz, BST = 35 dB,

25.5 28.5 31.5 dB

ADD = 0 dB, V

IN

= –30 dBm

BST2

Boost: on, f

i

= 50 Hz, BST = 35 dB,

21 24 27 dB

Boost level: high

ADD = 0 dB, V

IN

= –20 dBm

BST3

Boost: on, f

i

= 50 Hz, BST = 35 dB,

13 15 17 dB

ADD = 0 dB, V

IN

= –10 dBm

BST4

Boost: on, f

i

= 50 Hz, BST = 35 dB,

5 7 9 dB

ADD = 0 dB, V

IN

= 0 dBm

BST1

Boost: on, f

i

= 50 Hz, BST = 30 dB,

15 18 21 dB

ADD = –6 dB, V

IN

= –20 dBm

Boost level: low

BST2

Boost: on, f

i

= 50 Hz, BST = 30 dB,

8 10 12 dB

ADD = –6 dB, V

IN

= –10 dBm

BST3

Boost: on, f

i

= 50 Hz, BST = 30 dB,

1.5 3.5 5.5 dB

ADD = –6 dB, V

IN

= 0 dBm

Maximum output voltage

V

O

maxT THD = 1%, Boost: off 2.00 2.55 V

V

O

maxB THD = 1%, Boost: on 2.00 2.55 V

THD T

V

IN

= –10 dBm, Boost: off,

0.008 0.03 %

Total harmonic distortion

BPF = 400 Hz to 30 kHz

THD B

VIN= –10 dBm, Boost: on, fi= 50 Hz,

0.3 0.9 %

LPF = 30 kHz

CT T

VO= 0 dB, Rg = 10 kΩ, DIN AUDIO,

80 88 dB

Crosstalk

Boost: off

CT B

VO= 0 dB, Rg = 10 kΩ, DIN AUDIO,

50 59 dB

Boost: on

V

NO

T

Rg = 10 kΩ, JIS A, Boost: off,

–97 –90 dBm

Output noise voltage

Boost ADD = off

V

NO

B Rg = 10 kΩ, JIS A, Boost: on –91 –84 dBm

LED current I

LED

RED LED 11 15 19 mA

Electrical Characteristics at Ta = 25°C, VCC= 9 V, fi= 1 kHz, RL= 10 kΩ, BST = 35 dB, ADD = 0 dB, BST:ADD = ON

No. 5652-3/13

LA2650

Control Data for the Parameters in the Electrical Characteristics

*=don’t care

Parameter Conditions D1 D2 D3 D4 D5 D6 D7 D8

Quiescent current

I

CCO

T Boost: on L L L L L L L L

I

CCO

B Boost: off H H H H H H L H

Voltage gain V

IN

= 0 dBm
VG T Boost: off L L L L L L L L
VG B Boost: on H H H H H H L H

Boost level: high Boost: on, f

i

= 50 Hz, BST = 35 dB, ADD = 0 dB H H H H H H L H

Boost level: low Boost: on, f

i

= 50 Hz, BST = 30 dB, ADD = –6 dB H L H L H H L H

Maximum output voltage THD = 1%

V

O

maxT Boost: off L L L L L L L L

V

O

maxB Boost: on H H H H H H L H

Total harmonic distortion V

IN

= –10 dBm

THD T Boost: off, BPF = 400 Hz to 30 kHz L L L L L L L L
THD B Boost: on, f

i

= 50 Hz, LPF = 30 kHz H H H H H H L H

Crosstalk V

O

= 0 dBm, Rg = 10 kΩ, DIN AUDIO
CT T Boost: off L L L L L L L L
CT B Boost: on H H H H H H L H

Output noise voltage Rg = 10 kΩ, JIS A

V

NO

T Boost: off, Boost ADD = off L L L L L L L L

V

NO

B Boost: on H H H H H H L H

LED current

I

LED

RED LED * * * * * * H *

DC-CUT

VCA NF

5 to 10 V

Block Diagram

No. 5652-4/13

LA2650

VCA NF

DC-CUT

DECODER

DECODER

Test Circuit