1892 datasheet(21/42 Pages) NEC

21 / 42 page

µPC1892

Electrical characteristics measurement:

µPC1892CT-02 Volume control, tone control block (1/3)

Parameter

Symbol

Test conditions

Surround

mode

VOL

BAL

TRE

BAS

L+R

EFF

Volume attenuation

ATTVOL

OFF

5.0

2.5

–

↓

L-channel

0.2

LIN (Pin 25) : f = 1 kHz, VIN = 0.5 Vr.m.s.

VREF : LOUT (Pin 14) (Volume control

voltage : 5.0 V)

VATT : LOUT (Pin 14) (Volume control

voltage : 0.2 V)

JIS-A filter used.

R-channel

RIN (Pin 26) : f = 1 kHz, VIN = 0.5 Vr.m.s.

VREF : ROUT (Pin 12) (Volume control

voltage : 5.0 V)

VATT : ROUT (Pin 12) (Volume control

voltage : 0.2 V)

JIS-A filter used.

L+R volume

ATTL+R

OFF

––––

5.0

–

attenuation

↓

LIN, RIN (Pin 25, 26) : f = 1 kHz,

0.2

VIN = 0.5 Vr.m.s.

VL+RREF : L+ROUT (Pin 13)

(L+R volume control voltage : 5.0 V)

VL+RATT : L+ROUT (Pin 13)

(L+R volume control voltage : 0.2 V)

JIS-A filter used.

Note 1.

OFF: OFF mode

2. VOL: Volume control voltage, BAL: Balance control voltage, TRE: Treble control voltage, BAS: Bass control voltage,

L+R: L+R volume control voltage, EFF: Effect control voltage, –: Undefined

VL+RATT

ATTL+R = 20 log

VL+RREF

Note 1

Control pin voltage (V) Note 2

VATT

ATTVOL = 20 log

VREF

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