HA12157NT datasheet(5/57 Pages) HITACHI

Part #	HA12157NT

Description	Audio Signal Processor for Cassette Deck (Dolby B/C-type NR with Recording System)

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Manufacturer	HITACHI [Hitachi Semiconductor]

Direct Link	http://www.renesas.com/eng

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5 / 57 page

HA12155NT/HA12157NT

Rev.4, Jun. 1997, page 5 of 57

Electrical Characteristics (Ta = 25°C V

CC = 14 V Dolby level 300 mVrms) (cont)

Item

Symbol

Min

Typ

Max

Unit

Test conditions

Notes

Volume mute

G

VVR (MUT)

—

–80.0 dB

Vin = 3 Vrms, f = 1 kHz

Max-input level to volume Vin max (VR)

11.0

12.6

—

dBs

f = 1 kHz, THD = 1%,

V

CC = 12 V

Volume S/N

S/N (VR)

78.0

84.0

—

dB

Vin = 100 mVrms, f = 1

kHz, A-WTG

Volume THD

THD (VR)

—

0.04

0.3

%

Vin = 100 mVrms, f = 1

kHz

Equalizer gain

G

V EQ (500)

13.0

15.0

17.0

dB

Vin = 77.5 mVrms,

f = 500 Hz

G

V EQ (1K)

13.0

15.0

17.0

Vin = 77.5 mVrms,

f = 1 kHz

G

V EQ (5K)

14.5

16.5

18.5

Vin = 77.5 mVrms,

f = 5 kHz

G

V EQ (10K)

18.5

20.5

22.5

Vin = 77.5 mVrms,

f = 10 kHz

G

V EQ (20K)

29.5

32.0

34.5

Vin = 77.5 mVrms,

f = 20 kHz

Equalizer maximum input Vin max (EQ)

–8.0

–7.0

—

dBs

f = 1 kHz, THD = 1%,

V

CC = 12 V

*1

Equalizer S/N

S/N (EQ)

57.0

62.0

—

dB

Rg = 5.1 k

Ω, A-WTG

Equalizer THD

THD (EQ)

—

0.2

0.5

%

Vin = 77.5 mVrms,

f = 1 kHz

Equalizer offset

Vofs (EQ)

–400 0.0

+400 mV

no signal

Level meter output

LM (0 dB)

2.60

2.85

3.10

V

Vin = 0 dB, f = 1 kHz

*2

LM (12 dB)

3.60

3.90

4.20

V

Vin = 12 dB, f = 1 kHz

Level meter output

LM (–20 dB)1

0.80

1.10

1.40

V

Vin = –20 dB, f = 1 kHz

*2

LM (–20 dB)2

2.55

3.0

3.15

V

Vin = –20 dB, f = 1 kHz,

–20 dB range

Level meter offset

LMofs 1

—

150

300

mV

no signal

LMofs 2

—

200

350

no signal, –20 dB range

Notes: 1. HA12155 V

CC = 9.5 V, HA12157 VCC = 12 V

2. 0 dB = PB-OUT level

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