HA12155NT/HA12157NT
Audio Signal Processor for Cassette Deck (Dolby B/C-type NR
with Recording System)
ADE-207-115C (Z)
4th Edition
June 1997
Description
HA12155NT/HA12157NT is silicon monolithic bipolar IC providing Dolby noise reduction system*,
electrical volume system, REC equalizer system and level meter system in one chip.
Functions
• REC equ alizer × 2 channel
• Dolby B/C NR × 2 channel
• Electronic volume × 2 channel
• Level Meter × 2 channel
Features
• Inductor less REC equalizer is adjustable of its characteristics by external resistor
• Rec level is adjustable au tomatically with electrical v olume which is built-in
• 3 type of input selection is available (one is by way of electrical volume)
• Separate input selection SW and REC/PB SW
• Dolby noise reduction with dubbing cassette decks
(Unprocessed signal output available from recording out terminals during PB mode)
• Log-compressed level meter output is range from 0 V to 5 V
(Usable as music search switchable gain of 0 dB and 20 dB respectivily)
• Normal-speed/high-speed (Double), normal/metal/chrome fully electronic control switching built-in
• NR-ON/OFF, Dolb y B/C, MPX ON/OFF fully electronic co ntrol switching built-in
(Controllable from micro-controller directly)
• Reduction of number of pin by transfered serial data to electronic volume control switching and another
control switching
(Controllable from micro-controller directly)
• Low external parts count
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 2 of 57
* Dolby is a trademark of Dolby Laboratories Licensing Corporation.
A license from Dolby Laboratories Licensin g Corporation is required for the use of this IC.
Ordering Information
Operating voltage
Type Package Dolby Level REC-OUT Level PB-OUT Level Min Max
HA12155NT DP-64S 300 mVrms 300 mVrms 580 mVrms 9.5 V 16 V
HA12157NT 775 mVrms 12 V 16 V
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 3 of 57
Block Diagram
DATA CLK STB GND
(1) VRI
(L) CNT
(L) RPI
(L) BIAS PBI
(L) DGND
IA OUT
(L) NRIN
(L)
PB OUT
(L)
REC
OUT(L) LM
IN(L)
LM
OUT(L)
EQ
IN(L)
GND
(2) EQ
OUT(L)
NN NC NM HN HC HM
EQ-Controller
FM fQ f/Q GH GL GP
EQ
OUT(R)
IREF
EQ
IN(R)
LM
OUT(R)
LM
IN(R)
REC
OUT(R)
PBOUT
(R)
Vref
(R)
NRIN
(R)
IA OUT
(R)
INJ
PBI
(R)
REF
RPI
(R)
CNT
(R)
VRI
(R)
V
CC
MPX
ON/OFF
C/B
NR
ON/OFF
BIAS 6BIT
DAC
SW
IA
IA
E VOL
6BIT
DAC
Shift
register
Latch
Decoder
Dolby B/C NR
RECT
REC
EQ
RECT
LMA
LMA
+
–
+
–
REC
EQ
M
P
X
64 63 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
456 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32321
62
Vref
(L)
M
P
X
Dolby B/C NR
E VOL
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 4 of 57
Absolute Maximum Ratings
Item Symbol Ratings Unit
Supply voltage VCC 16 V
Power dissipation*1 Pd 770 mW
Operating temperature Topr –30 to +75 °C
Storage temperature Tstg –55 to +125 °C
Note: 1. Value at Ta ≤ 75°C
Electrical Characteristics (Ta = 25°C VCC = 14 V Dolby level 300 mVrms)
Item Symbol Min Typ Max Unit Test conditions Notes
Quiescent curr ent IQ— 29.0 37.0 mA no signal
Input amp gain GVIA RPI 18.5 20.0 21.5 dB Vin = 0 dB, f = 1 kHz
GVIA PBI 18.5 20.0 21.5
B-type NR Encode Boost B-ENC-2K 2.8 4.3 5.8 dB Vin = –20 dB, f = 2 kHz
B-ENC-5K 1.7 3.2 4.7 Vin = –20 dB, f = 5 kHz
C-type NR Encode Boost C-ENC-1K(1) 3.9 5.9 7.9 dB Vin = –20 dB, f = 1 kHz
C-ENC-1K(2) 18.1 19.6 21.6 Vin = –60 dB, f = 1 kHz
C-ENC-700 9.8 11.8 13.8 Vin = –30 dB, f = 700 Hz
Signal handling Vomax 12.0 13.0 — dB f = 1 kHz, THD = 1%,
VCC = 12 V *1
Signal to noise ratio S/N 60.0 63.0 — dB Rg = 5.1 kΩ, CCIR/ARM
Total harmonic distortion THD — 0.08 0.3 % Vin = 0 dB, f = 1 kHz
Crosstalk CT (R↔L) — –85.0 –79.0 dB Vin = 0 dB, f = 1 kHz
CT (RPI↔PBI) — –80.0 –74.0
CT (VRI↔RPI) — –77.0 –71.0
Control Hi level VcH 3.5 — 5.3 V MPX ON/OFF, NR
voltage Lo level VcL –0.2 — 1.0 ON/OFF C-NR/B-NR
Serial data Hi level VsH 3.5 — 5.3 V CLK, DATA, STB
voltage Lo level VsL –0.2 — 1.0
PB-out level HA12155 Vout 500 580 670 mVrms Vin = 0 dB, f = 1 kHz
HA12157 665 775 900
PB-offset Vofs –100 0.0 +100 mV no signal
Channel balance ∆GV–1.0 0.0 1.0 dB Vin = 0 dB, f = 1 kHz
Volume gain GVVR (MAX) 17.5 19.3 21.5 dB Vin = 100 mVrms, f =1 kHz
GVVR (MIN) — — –55.0 Vin = 3 Vrms, f = 1 kHz
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 5 of 57
Electrical Characteristics (Ta = 25°C VCC = 14 V Dolby level 300 mVrms) (cont)
Item Symbol Min Typ Max Unit Test conditions Notes
Volume mute GVVR (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%,
VCC = 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 GV EQ (500) 13.0 15.0 17.0 dB Vin = 77.5 mVrms,
f = 500 Hz
GV EQ (1K) 13.0 15.0 17.0 Vin = 77.5 mVrms,
f = 1 kHz
GV EQ (5K) 14.5 16.5 18.5 Vin = 77.5 mVrms,
f = 5 kHz
GV EQ (10K) 18.5 20.5 22.5 Vin = 77.5 mVrms,
f = 10 kHz
GV 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%,
VCC = 12 V *1
Equalizer S/N S/N (EQ) 57.0 62.0 — dB Rg = 5.1 kΩ, 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 VCC = 9.5 V, HA12157 VCC = 12 V
2. 0 dB = PB-OUT level
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 6 of 57
Test Circuit
Mode
controller AC VM 2
DC VM 2
AC VM 3
EQ
PB
RP
VR
SW4
µ
µ
µ
µ
µµ
µ
µµ
µ
µ
µ
µ
µ
µµµ
µ
µ
µµ
µ
µ
µµ
Ω
µ
Audio SG AC VM 1 DC
Source 1 DC
Source 2 DC
Source 3 AC VM 4
Distortion
analyzer
Noise meter
R4
10 k R5
10k
R6
10 k
R67
5.1 k R66
5.1 k
C3
0.47
1 0.47
C33 C2 R29
18 k C1
0.47
Degital
GND
SW8
TP3 TP4
OFF SW25
ON
R27
2.4 k R26
5.6 k
R25
10 k
C30
2.2
C28 C29
2200p 2200p
R24
22 k R23
560
C27 C26 C25
2200p 0.1 0.1
R21
20 k C23
0.1
C24
2.2
C22
1
R20
100 k R71
51 k
R22
7.5 k
C21
0.47 4.7
C20
R19
10 k
PB
REC
EQ SW12
SW14
L
LM
EQ
REC
PB
ON OFF
SW16
R1
22 k R2
22 k R3
22 k
SW18 SW19 SW20
OFF ON
cb
ON
SW21 SW23
S2 S3 S2 S3
L
ON
SW3 VR
RP
PB
EQ
OFF
SW1
R30 R31 R32 R33 R34 R35
R36 R37 R38 R39 R40 R41
R42 R43 R44 R45 R46 R47
R48 R49 R50 R51 R52 R53
R54 R55 R56 R57 R58 R59
R60
C4 C5 C6 C7 C8
0.47
1
R68
5.1 k R69
5.1 k R7
10 k
R9
2.4 k R10
5.6 k
OFF SW24
ON
TP2TP1 SW7
R11
22 k R13
560
C9 C10
2200 p 2200 p
C11
2.2 +
R12
10 k
C12 C13 C14
2200p 0.1 0.1
C15
+
2.2
R14
20 k
R75
16 k
+
C16
0.1
C17
1R16
100 k
C18
0.47
R17
24 k C19
4.7
R18
10 k
100k 51 k 51 k 33 k 33 k 33 k
EQ
REC
PB SW11
RL
SW17 LM
EQ
REC
PB
SW13
NR
ON/OFFC/B MPX
ON/OFF VCC VRI
(R) CNT
(R) RPI
(R) REF INJ IA OUT
(R) NRIN
(R) V
(R) PBOUT
(R) SS1
(R) SS2
(R) CCR
(R)
HLS
DET(R) REC
OUT(R) LM
IN(R) LM
DET(R) LM
OUT(R) EQ
IN(R) IREF
PBI
(R)
EQ
OUT(R) FM FQ F/Q GH GL GP
IA OUT
(L) NRIN
(L) V
(L) PBOUT
(L) SS1
(L) SS2
(L) CCR
(L)
HLS
DET(L) REC
OUT(L) LM
IN(L) LM
DET(L) LM
OUT(L)
PBI
(L)
EQ
IN(L) EQ
OUT(L)
GND
(2) NN NC NM HN HC HM
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
12345678910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 30 31 32
DATA CLK STB GND
(1) VRI
(L) CNT
(L) RPI
(L) BIAS DGND
3
++ +++ +
HA12155/7 NT (REC 1 CHIP) DP-64S
R15
7.5 k
14 V 5 V
R
++++
+
0.47
C32
100
Notes 1: Registor tolerance are ±1 %
2: Capacitor tolerance are ±1 %
3: Unit R: C:F
+
+
R28
10 k
+
REF
REF
R72
16 k
+
LSW10
SW9
R70
51k
LLS
DET(L)
LLS
DET(R)
S2 S3
OFF
Oscilloscope
Noise meter
with CCIR/ARM filter
and A–WTG filter
0.47
1
C60
10p
C61
10p
C62
10p
R8
1.2 k
29
SW22
SW15
R
+
R61 R62 R63 R64 R65
+
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 7 of 57
Example of Split Supply Circuit
0.47µ
CN1
STB
CLK
DATA
DGND
C/B
MPX
ON/OFF
NR
ON/OFF
V
CC
2
(+5 V)
1
2
3
4
5
6
7
8
PBI (L)
RPI (L)
VRI (L)
R4
10 k R5
10 k R6
10 k C3
++
1µ+0.47µ
C33 C2
R67
5.1 k R66
5.1 k R28
10 k
R29
18 k C1
0.47µ
Degital GND
R27
2.4 k R26
5.6 k R24
22 k R23
560
C29C28
C30
2.2µ
+
+
R25
10 k
2200 p 2200 p C27
2200 p
C26 C25
0.1µ0.1µ2.2µ
C24
R21
20 k C23
0.1µ
++
C22
1µ
R20
100 k R71
51 k
+
C21
0.47µ+C20
0.47µ
R22
7.5 k
R19
10 k
EQOUT (L)
LMOUT (L)
PBOUT (L)
RECOUT (L)
EQIN (L)
R72
16 k
TP3
TP4
R1
22 k R2
22 k R3
22 k 0.47µ
C4 +C5 C6 C7 C8
++++
1µ0.47µ1µ0.47µ
R68
5.1 k R69
5.1 k R7
10 k
R8 R9
2.4 k R10
5.6 k R11
22 k R13
560
C9 C10
C11
2.2 µ
R12
10 k
+2200 p2200 p
2200 p
C12 C13 C14 C15 C16
C17
C18 C19
0.1 µ0.1 µ
2.2 µ
+
R14
20 k
0.1 µ
1µR16
100 k
R75
16 k EQIN (R)
RECOUT (R)
PBOUT (R)
R70
51 k
R15
7.5 k
R18
10 k
+
4.7 µ
R30
R36
R42
R48
R54
R60
R31
R37
R43
R49
R55
R61
R32
R38
R44
R50
R56
R62
R33
R39
R45
R51
R57
R63
R34
R40
R46
R52
R58
R64
R35
R41
R47
R53
R59
R65
100 k 51 k 51 k 33 k 33 k 33 k
EQOUT (R)
LMOUT (R)
TP2
TP1
VRI (R)
RPI (R)
RBI (R)
CN2
C34
100µ
+
+C32
100µ
GND
VEE
VCC1
1
2
3
1234567891011121314151617181920212223242526272829303132
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
DATA CLK STB GND
(1) VRI
(L) CNT
(L) RPI
(L) BIAS PBI
(L) DGND IAOUT
(L) NRIN
(L) Vref
(L) PBOUT
(L) SS1
(L) SS2
(L) CCR
(L) HLS
DET (L) LLS
DET (L) REC
OUT (L) LM
IN (L) LM
DET (L) LM
OUT (L) EQ
IN (L) GND
(2) EQ
OUT (L) NN NC NM HN HC HM
NR
ON/OFF C/B MPX
ON/OFF V
CC
VRI
(R) CNT
(R) PRI
(R) REF PBI
(R) INJ IAOUT
(R) NRIN
(R) Vref
(R) PBOUT
(R) SS1
(R) SS2
(R) CCR
(R) HLS
DET (R) LLS
DET (R) REC
OUT (R) LM
IN (R) LM
DET (R) LM
OUT (R) EQ
IN (R) IREF EQ
OUT (R) FM FQ FQ GH GL GP
HA12155/7 (REC 1 CHIP) DP-64S
R17
++ 0.47µ
*1
Note 1: The pin 10 can connect to V 1 through R8.
The value of external resistor R8 is obtained by using following equations.
3.6
V – V – 0.7
INJ EE
R8 = (k )
Ω
CC
C62
10p
C61
10p
C60
10p
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 8 of 57
Mode Controller
GND V (+5 V)
CC
C
100 µR
2
4
R
1
22 k
22 k
R
1 M
3
C
1
2.2 µ
Q
Q
SW9
X'tal OSC
N11 IC8 N12 IC8
R
22
X'tal
1 MHz
C
2
10 p
C
3
120 p
R
4
510
CLR
QAQBQCQD
62.5 kHz
125 kHz
250 kHz
500 kHz
R
7
22 k R
8
22 k R
9
22 k R
10
22 k R
11
22 k R
12
22 k R
13
22 k R
14
22 k
SW8 SW7 SW6 SW5 SW4 SW3 SW2 SW1
ABCDEFG H
D IC4
7
CLK CLK
INHIBIT
SHIFT
LOADQH
SW10
MCLK
D IC2
2
D IC2
1
TRIGGER
IC 1
CLR
TRIGGER Q
Q
CLR
PR
DQ
Q
CLR
PR
D
R
22 K
4
R
22 K
5
N13 IC8
N1 IC6
N5 IC8
Q
CLR
A
Q
B
Q
C
Q
D
D IC3
D IC9
Q
Q
CLR
PR
D
R
22 k
17
N3 IC6 N4 IC8
N6 IC6
D IC5
6
D IC5
5
D IC5
4
Q
Q
CLR
DQ
Q
CLR
DQ
Q
CLR
D
N7 IC6
N9 IC7
N10 IC7 DATA
CLK
V (+5 V)
GND
STB
MPX•ON/OFF
C/B
NR•ON/OFF
CC
N8 IC7
JP1
JP2
JP3
1
6
5
SW1 SW2 SW3
+
3
N2 IC8
9
D IC3
8
1M
1
4
8
2
3
Notes 1: HC type IC which operate eqaully is also applicable instead of IC1-IC9.
2: As for IC1-IC9, input pins which are not used should be pulled up with resistor of 22 k .
3: As for IC1-IC9, required to put 0.1 F-capacitor between near GND pin and Voltage source pin for bypass.
Ω
µ
Parts No.
IC1
IC2
IC3
IC4
IC5
IC6
IC7
IC8
IC9
Type
HD74HC221
HD74HC74
HD74HC393
HD74HC165
HD74HC175
HD74HC00
HD74HC00
HD74HC04
HD74HC74
4: Unit R : , C : F
Ω
+
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 9 of 57
Pin Description (VCC = 14 V, Ta = 25°C, No signal, the value in the table show typical
value)
Pin No. Terminal DC
DP-64S name Zin voltage Equivalent circuit Description
7 RPI 100 kΩVCC/2 Recording inp ut
58
9 PBI Play back input
56
21 LM IN HA12155
---75 kΩLev el met er input
44 HA12157
---100 kΩ
24 EQ IN 100 kΩEqualyzer input
41
5 VRI 100 k ΩVCC/2 Volume input
60 +0.7 V
4V
CC —V
CC — Power supply
8REF—V
CC/2 — Ripple filter
12 NR IN — VCC/2 NR processor input
53
15 SS 1 — VCC/2 Spectral skewing amp
input
50
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 10 of 57
Pin Description (VCC = 14 V, Ta = 25°C, No signal, the value in the table show typical
value) (cont)
Pin No. Terminal DC
DP-64S name Zin voltage Equivalent circuit Description
17 CCR — VCC/2 Current controled
48 resistor output
11 IA OUT — VCC/2 Input amp output
54
V
GND
CC
13 VREF Reference voltage
52 buffer output
14 PB OUT Play back (Decode)
51 output
16 SS 2 Spectral skewing
49 amp. output
20 REC OUT Recording (Encode)
45 output
26 EQ OUT Equalyzer output
39
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 11 of 57
Pin Description (VCC = 14 V, Ta = 25°C, No signal, the value in the table show typical
value) (cont)
Pin No. Terminal DC
DP-64S name Zin voltage Equivalent circuit Description
18 HLS DET — 2.3 V Time constant pin for
47 rectifier
19 LLS DET
46
57 BIAS — 0.28 V
GND
Dolby NR Reference
current input
25 IREF — 1 .2 V EQ Reference current
input
27 FM EQ Parameter current
28 fQ input
29 f/Q
30 GH
31 GL
32 GP
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 12 of 57
Pin Description (VCC = 14 V, Ta = 25°C, No signal, the value in the table show typical
value) (cont)
Pin No. Terminal DC
DP-64S name Zin voltage Equivalent circuit Description
33 HM — —
GND
EQ Parameter
selector
34 HC
35 HN
36 NM
37 NC
38 NN
6 CNT 5.2 kΩVCC/2- DAC output Volume
59 1.5 V to
VCC/2 V / 2
DAC
out
CC control input
22 LMD — 0.2 V Time constant Pin for
43
LM OUT
GND
LMD
level meter
23 LM OUT — 0.2 V Level meter output
42
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 13 of 57
Pin Description (VCC = 14 V, Ta = 25°C, No signal, the value in the table show typical
value) (cont)
Pin No. Terminal DC
DP-64S name Zin voltage Equivalent circuit Description
1NR
ON/OFF 100 kΩ—
D - GND
GND
Mode control input
2C/B
3MPX
ON/OFF
62 STB
63 CLK
64 DATA
10 INJ —0.7 V —Injection current input
for I2L
55 D-GND —0.0 V —Digital (Logic) ground
40 GND —0.0 V —Ground
61
Application Note
Power Supply Range
HA12155NT/HA12157NT are designed to operate on either single supply or split supply.
The operating range of the supply voltage is shown in table 1.
Table 1 Supp ly Voltag e
Type No. Single supply Split supply
HA12155NT 9.5 V to 16 V ±6 V to 8 V
HA12157NT 12 V to 16 V ±6 V to 8 V
The lower limit of supply voltage depends on the line output reference level.
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 14 of 57
The minimum value of the headroom margin is specified as 12 dB by Dolby Laboratories. HA12155 series
are provided with two line output level, which will per m it an optimum headroom m argin for power supply
conditions.
Reference Voltage
For the single supply operation these devices provide the reference voltage of half the supply voltage that is
the signal grounds. As the peculiarity of these devices, the capacitor for the ripple filter is very small about
1/100 compared with their usual value. The Reference voltage are provided for the left channel and the
right channel separately. The block diagram is shown as figure 1.
L channel
reference
R channel
reference
V
8
52
13
+
–
–
+
+1 F
CC
µ
Figure 1 The Block Diag ram of Reference Voltage Supply
Operating Mode Control
HA12155NT/HA12157NT provides fully electronic switching circuits. NR-ON/OFF, C/B, and MPX
ON/OFF switches are controlled by parallel data (DC voltage) and other switches are controlled by serial
data.
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 15 of 57
Table 2 Threshold Voltage (VTH)
Pin No. Lo Hi Unit
1, 2, 3 –0.2 to 1.0 3.5 to 5.3 V
62, 63, 64 –0.2 to 1.0 3.5 to 5.3 V
Notes: 1. Voltages shown above are determined by internal circuits of LSI when take pin 55 (DGND pin) as
reference pin. On split supply use, same VTH can be offered by connecting DGND pin to GND
pin.
This means that it can be controlled directly by micro processor.
2. Each pins are on pulled down with 100 kΩ internal resistor.
Therefore, it will be low-level when each pins ar open.
3. Note on serial data inputt ing
(a) The clock frequency on CLK must be less than 500 kHz.
(b) Over shoot level and under shoot level of input signal must be the value shown below.
(c) The serial input pins (pins 62, 63, and 64) are extremely sensitive to undershoot, overshoot,
ringing, and noise. This can result in malfunctions due to problems with the wiring pattern.
We recommend attaching capacitors in parallel with the serial input pins to ameliorate this
problem.
Figure 2-b shows an example of this circuit appropriate when the clock frequency is 500
kHz. The value of the capacitor should be set in accordance with the clock frequency
actually used.
4. NR Mode Switching
In actual use, pop noises may accompany NR on/off switching in C mode. To avoid these
noises, use the following sequences to turn NR on and off.
From C mode NR off to C mode NR on:
(C mode, NR off) → (B mode, NR off) → (B mode, NR on) → (C mode, NR on).
From C mode NR on to C mode NR off:
(C mode, NR on) → (B mode, NR on) → (B mode, NR off) → (C mode, NR off).
Table 3 Switc hing Truth Table
Pin No. Lo Hi
1 NR-OFF NR-ON
2 B-NR C-NR
3 MPX-ON MPX-OFF
Notes: 1. Low level will be offered when each pins are open.
2. Please refer to next term as for the serial data for formatting.
When connecting microcomputer or Logic-IC with HA12155NT/HA12157NT directly, there is
apprehension of rash-current under some transition timming of raising voltage or falling voltage at VCC
ON/OFF.
For this countermeasure, connect 10 kΩ to 20 kΩ resistor with each pins. It is shown in test circuit.
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 16 of 57
within –0.2 V
under 5.3 V
0
Figure 2 Input Level
Serial Data Formatting
8 bit shift register is employed. CLK and DATA are stored during STB being high and data is ratched
when STB goes high to low. The clock frequency on CLK must be less than 500 kHz.
01234567
latch of data
5 V
0 V
5 V
0 V
5 V
0 V
CLK
DATA
STB
Figure 3 Serial Data Timming Chart
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 17 of 57
Table 4 Serial Data Formatting
Bit
No. Control
register Volume register
0 TAPE H DAC0
SELECT 1 L
TS1
TS2
H
HL
L
TAPE
IV
TAPE
II
TAPE
I
TAPE
I
bit No.
543210
LLLLLL
LLLLLH
LLLLHL
LLLLHH
HHHHLH
HHHHHL
HHHHHH
increase
gain
decrese
mute
1 TAPE H DAC1 *mute is implemented when all
SELECT 2 L bits are high.
2 TAPE H High (double) speed selection DAC2
SPEED L Normal speed selection
3 METER H Meter sensitivity 20 dB up DAC3
SENSITIVITY L Meter sensitivity normal
4 INPUT H DAC4
SELECT 1 L
IS1
IS2
H
HL
L
PB
I
RP
I
VR
I
VR
I
5 INPUT H DAC 5
SELECT 2 L
6 REC/PB H PB mode selection R/L SELECT H Rch register selection
L REC mode selection L Lch register selection
7REGISTER
SELECT H Control register selection REGISTER
SELECT L Volume register selection
Note: TAPE I: Normal tape, TAPE II: Chrome tape, TAPE IV: Metal tape
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 18 of 57
Input Bloc k Diagram a nd Level Diagram
–3 dB
IA
OUT NR
lN
MPX
Filter
RPI PBI
PB - OUT
NR
circuit
MPX ON
MPX OFF
– 3 dB
Input
Amp
Elect-
rical
VR
MA
VRI
43 mVrms
(–25.2 dBs)
43 mVrms
(–25.2 dBs) 426 mVrms
(–5.2 dBs) 300 mVrms
(–8.2 dBs) HA12157
775 mVrms
(0 dBs)
HA12155
580 mVrms
(–2.5 dBs)
47 mVrms
(–24.3 dBs)
VRI
RPI PBI
IA
OUT MPX
Filter NR
lN PB - OUT
HA12155
580 mVrms
(–2.5 dBs)
HA12157
775 mVrms
(0 dBs)
NR
circuit
MA
Input
Amp
300 mVrms
(–8.2 dBs)
30 mVrms
(–28.2 dBs)
30 mVrms
(–28.2 dBs)
Elect-
rical
VR
33 mVrms
(–27.4 dBs) NR circuit
The each level shown above is typical value when
offering Dolby level to test point pin (NR IN) with
the gain of electrical volume is under the condition
of max.
The each level shown above is typical value when
offering Dolby level to test point pin (IA OUT) with
the gain of electrical volume is under the condition
of max.
b) REC mode
a) PB mode
Figure 4 Input Blo ck Diagram
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 19 of 57
MPX ON/OFF Switch
MPX-OFF mode means that signal from input amp doesn’t go through the MPX filter, but signal goes
through the SS circuit after being attenuated 3 dB by internal resistor. Refer to figure 5. For not cause any
level differe nce between MPX-ON mode and MPX- OFF mode, it is requested to use MPX-filter which has
definitely 3 dB attenuated. MPX-OFF mode offer totally flat frequency response and no bias-trap effect.
And when applying other usage except figure 5, take consideration to give bias voltage to NR-IN terminal
by resistor or so on because internal of NR-IN terminal hsa no bias resistor.
5.6 k
MPX
2.4 k
Vref
INPUT amp MPX ON
MPX OFF
NR
PROCESSER
Vref
3 dB ATT.
IA OUT NR IN VREF
+
–
+
–
Ω
Ω
Figure 5 MPX ON/OFF Switch Block Diagram
Application as for the Dubbing Cassette Deck
HA12155NT/HA12157NT series has unprocessor signal from recording out terminals during plyaback
mode. So, it is simply applied for dubbing cassette decks.
And HA12155NT/HA12157NT ha s three in put terminal. So, it is applicable to switch the signal from PB-
EQ as shown below.
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 20 of 57
A deck
PB EQ PB EQ B deck
Compensation
of low
frequency
region
REC OUTPBIRPI
EQ IN
EQ OUT
VRIREC IN
PB OUT
REC PB
HA12155 / 7
Figure 6 Applicatio n for Dubbing Deck
Injector Current
HA12155NT/HA12157NT has logic circuit which is fabricated by I2L into IC. To operate this circuit, it is
required enough injector current. Injector current goes into from the INJ pin (pin 10) and external resistor
is required to connect to this pin for adequate current. The value of external resistor is obtained by using
following equatio ns. And put them with ±10% tolerance value which is calcu lated. VINJ can allow to
connect to VCC shown below. Unde r the condition of high temperature, the mis-operation of logic is caused
by large injector current. Also, under the condition of low temperature, the stop of logic is caused by small
injector curr ent. Therefore, pay attention to have good stability of VINJ.
RINJ =VINJ –0.7
3.6 [kΩ] ---- Single supply
RINJ =VINJ +VEE –0.7
3.6 [kΩ] ---- Split supply
R
3.6 mA
V
HA12155 / 7
10
40 61
a) Single supply use b) Split supply use
40 61
10
3.6 mA HA12155 / 7
INJ
INJ
V
INJ
R
INJ
V
EE
Figure 7 Injector Current Application
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 21 of 57
Gain Control of Electronic Volume
HA12155NT/HA12157NT is designed in order to change the gain by 6 bit DAC fabricated into IC. To
reduce the click noise when changing volume gain instantaneously, required to connect the capacitor (CR
time constant) to CNT pin (pin 6,59). These terminals are also be used as output pin of DAC. Therefore,
by forcing voltag e or cu rrent to these terminals, it is applicable to control volume gain directly. But,
voltage forced to these term inals must be from VCC/2 –2 V to VCC/2 (for split supply use, –2 V to 0 V) in this
case. In case of forcing the current these pins, voltage must be the value mentioned above even it is ±20%
distributed of internal resistor (5.2 kΩ) of CNT pin. And, these case, change of a gain depending on a
temperature gets large.
The Tolerances of External Components for Dolby NR-Block
For adequate Dolby NR tracking response, take external components shown below.
For smooth capacitors of C13, C14, C25 and C26, please employ a few object of the leak, though you can
be useful for an electrolytic capacitor.
C25
0.1
10%
C26
0.1
10%
C27
2200 p
5%
R23
560
2%
C29
2200 p
5%
C28
2200 p
5%
R24
22 k
2%
R29
18 k
2%
57 51 50 49 48 47 46
14 15 16 17 18 19
BIAS PB OUT
(L) SS1
(L) SS2
(L) CCR
(L) HLS
DET(L) LLS
DET(L)
PB OUT
(R) SS1
(R) SS2
(R) CCR
(R) HLS
DET(R) LLS
DET(R)
R11
22 k
2%
C9
2200 p
5%
C10
2200 p
5%
R13
560
2% C12
2200 p
5%
C13
0.1
10%
C14
0.1
10%
Unit R :
C : F
±±
±±±±±±
±±±
±
±
±
±
µµ
µµ
Ω
HA12155/7 (REC 1 Chip)
Figure 8 Tolerances of External Components
Level Meter
The coupling capacitor of LMIN pin (21 pin and 44 pin).
For these capacitors please employ a small object of the leak.
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 22 of 57
The Application of Equalizer Frequency Response
EQ
IN
R1
R2
R3
OP1 Gm1 OP2 Gm2
F / Q
OP5 R6
R7
R10
EQ
OUT
R9
R8
GH
GL
FM
R4 R5
Gm4
OP6 Gm3
OP3
Gm5
OP7
Gm6
OP4
C3
GP
C1
C2
+
_
+
_
+
_
+
_
+
_
+
_
+
_+
_
_
+
_
+
_
+
_
+
_
+
Figure 9 REC Equalizer Block Diagram
Transfer Function:
Vout
Vin =R2+R3
R2Gm5 R8⋅R10
R9
1+C3
Gm4 Gm6
Gm5 S
1+C3
Gm4 S+Gm1 R4⋅R10
R6+R7
C2
Gm3 S
1+R4
R5
R7
R6+R7
C2
Gm3 S+R4
R5
C1
Gm2 C2
Gm3 S2
=4.16
RREF RGL
1+6.67 ×10−10 RFM ⋅RGH
RGL ⋅S
1+6.67×10−10RFM ⋅S+RGP 3.0×10−10 ⋅RFQ ⋅S
1+4.5 ×10−11 ⋅RFQ ⋅S+2.5×10−20 ⋅RFQ ⋅RF/QS2
*RREF-----25 pin bias resistance
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 23 of 57
Gain
3dB BW
f1 f2 f3 f
g1
g2
g3
Figure 10 REC Equalizer Frequency Response
gl =4.16
RREF 6.67 ×RGP +RGH
()
g2=4.16×RGL
RREF
g3 =4.16×RGH
RREF
f1 =1
2π×6.67 ×10−10 ×RFM
f2=RGL
2π×6.67 ×10−10 ×RFM ×RGH
f3=1
2π⋅0.3
2.25 ×10−21 ×RFQ ×RF/Q
BW =1
4π×2.78×10−10 ×RF/Q
Q=f3
BW =3.51×RF/Q
RF/Q
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 24 of 57
35
30
25 8 1012141618
Quiescent current I (mA)
Supply voltage Vcc (V)
PB : PBI in (DAC Step 0)
LM : Normal
REC : VRI in (DAC Step 0)
LM : Normal
Quiescent Current vs. Supply Voltage
Q
REC – C
REC – B
REC – OFF
PB – C
PB – B
PB – OFF
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 25 of 57
12
10
8
6
4
2
0100 200 500 1 k 2 k 5 k 10 k 20 k 50 k 100 k
Frequency (Hz)
NR–B RPI in RECOUT out
Encode Boost (dB)
9 V
16 V
14 V
: Vin = – 0 dB
: Vin = – 10 dB
: Vin = – 20 dB
: Vin = – 30 dB
: Vin = – 40 dB
Encode Boost vs. Frequency (HA12155)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 26 of 57
16 V
14 V
9 V
25
20
15
10
5
0
–5
–10100 200 500 1 k 2 k 5 k 10 k 20 k 50 k 100 k
Frequency (Hz)
Encode Boost (dB)
NR-C RPI in RECOUT out
: Vin = 0 dB
: Vin = – 20 dB
: Vin = – 30 dB
: Vin = – 40 dB
: Vin = – 60 dB
Encode Boost vs. Frequency (HA12155)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 27 of 57
: Vin = 0 dB
: Vin = – 10 dB
: Vin = – 20 dB
: Vin = – 30 dB
: Vin = – 40 dB
12
10
8
6
4
2
0
100 200 500 1 k 2 k 5 k 10 k 20 k 50 k 100 k
Frequency (Hz)
Encode Boost (dB)
16 V
14 V
11 V
Encode Boost vs. Frequency (HA12157)
NR-B RPI in RECOUT out
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 28 of 57
Encode Boost vs. Frequency (HA12157)
25
20
15
10
5
0
– 5
– 10
100 200 500 1 k 2 k 5 k 10 k 20 k 50 k 100 k
Frequency (Hz)
Encode Boost (dB)
14 V
16 V
11 V
: Vin = – 0 dB
: Vin = – 20 dB
: Vin = – 30 dB
: Vin = – 40 dB
: Vin = – 60 dB
NR-C RPI in RECOUT out
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 29 of 57
PB OUT
REC OUT
26
22
18
14
10
610 30 60 100 300 600 1 k 3 k 6 k 10 k 30 k 60 k 100 k
Frequency (Hz)
Output gain Gv (dB)
(NR – OFF, RPI) Vcc = 14 V
REC mode
Output Gain vs. Frequency (HA12155)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 30 of 57
PB OUT
REC OUT
28
24
20
16
12
810 30 60 100 300 600 1 k 3 k 6 k 10 k 30 k 60 k 100 k
Frequency (Hz)
Output gain Gv (dB)
PB mode (NR – OFF, RPI) Vcc = 14 V
Output Gain vs. Frequency (HA12155)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 31 of 57
PB OUT
REC OUT
10 30 60 100 300 600 1 k 3 k 6 k 10 k 30 k 60 k 100 k
Frequency (Hz)
28
24
20
16
12
8
Output gain Gv (dB)
(NR – OFF, RPI) Vcc = 14 V
REC mode
Output Gain vs. Frequency (HA12157)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 32 of 57
PB OUT
REC OUT
10 30 60 100 300 600 1 k 3 k 6 k 10 k 30 k 60 k 100 k
30
26
22
18
14
10
Frequency (Hz)
Out put gain Gv (dB)
Output Gain vs. Frequency (HA12157)
PB mode (NR – OFF, PBI) Vcc = 14 V
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 33 of 57
NR-C
NR-B
NR-OFF
–15 –10 –5051015
0.01
0.03
0.1
0.3
1.0
3.0
10
Output level Vout (dB)
Total harmonic distortin T.H.D. (%)
CC
RPI in RECOUT out REC mode
f = 100 Hz
V = 14 V
0 dB = 300 mVrms
Total Harmonic Distortion vs. Output Level (HA12155)
NR-C
NR-B
NR-OFF
–15 –10 –5051015
0.01
0.03
0.1
0.3
1.0
3.0
10
Output level Vout (dB)
Total harmonic distortion T.H.D. (%)
CC
RPI in RECOUT out REC mode
f = 1 kHz
V = 14 V
0 dB = 300 mVrms
Total Harmonic Distortion vs. Output Level (HA12155)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 34 of 57
NR-C
NR-B
NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12155)
–10 –5051015
Output level Vout (dB)
RPI in RECOUT out REC mode
f = 10 kHz
V = 14 V
0 dB = 300 mVrms
CC
NR-C
NR-B
NR-OFF
–15 –10 –5051015
0.01
0.03
0.1
0.3
1.0
3.0
10
Output level Vout (dB)
Total harmonic distortion T.H.D. (%)
CC
PBI in PBOUT out PB mode
f = 100 Hz
V = 14 V
0 dB = 580 mVrms
Total Harmonic Distortion vs. Output Level (HA12155)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 35 of 57
NR-C
NR-B
NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12155)
PBI in PBOUT out PB mode
f = 1 kHz
V = 14 V
0 dB = 580 mVrms
CC
–10 –5051015
Output level Vout (dB)
NR-C
NR-B
NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12155)
PBI in PBOUT out PB mode
f = 10 kHz
V = 14 V
0 dB = 580 mVrms
CC
–10 –5051015
Output level Vout (dB)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 36 of 57
NR-C
NR-B
NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12157)
RPI in RECOUT out REC mode
f = 100 Hz
V = 14 V
CC
–10 –5051015
Output level Vout (dB)
NR-C
NR-B
NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12157)
RPI in RECOUT out REC mode
f = 1 kHz
V = 14 V
CC
–10 –5051015
Output level Vout (dB)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 37 of 57
NR-C
NR-B
NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12157)
RPI in RECOUT out REC mode
f = 10 kHz
V = 14 V
CC
–10 –5051015
Output level Vout (dB)
NR-C
NR-B
NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12157)
RBI in RBOUT out PB mode
f = 100 Hz
V = 14 V
CC
–10 –5051015
Output level Vout (dB)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 38 of 57
NR-C
NR-B NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12157)
PBI in PBOUT out REC mode
f = 10 kHz
V = 14 V
CC
–10 –5051015
Output level Vout (dB)
NR-C
NR-B
NR-OFF
–15
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
Total Harmonic Distortion vs. Output Level (HA12157)
PBI in PBOUT out PB mode
f = 10 kHz
V = 14 V
CC
–10 –5051015
Output level Vout (dB)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 39 of 57
Max. Output Level vs. Supply Voltage (HA12155)
Supply voltage V (V)
CC
Max. output level Vo max (dB)
T.H.D. = 1%
0 dB = 300 mVrms
f = 1 kHz REC mode RPI in RECOUT out
OFF
B
C
8 9 10 11 12 13 14 15 16
0
5
10
15
20
Max. Output Level vs. Supply Voltage (HA12155)
Supply voltage V (V)
CC
Max. output level Vo max (dB)
T.H.D. = 1%
0 dB = 580 mVrms
f = 1 kHz PB mode PBI in PBOUT out
8 9 10 11 12 13 14 15 16
0
5
10
15
20
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 40 of 57
Max. Output Level vs. Supply Voltage (HA12157)
Max. output level Vo max (dB)
Supply voltage V (V)
CC
f = 1 kHz REC mode
RPI in RECOUT out
9101112131516
0
10
15
20
5T.H.D. = 1%
0 dB = 300 mVrms
B
C
OFF
Max. Output Level vs. Supply Voltage (HA12157)
Max. output level Vo max (dB)
Supply voltage V (V)
CC
f = 1 kHz PB mode
PBI in PBOUT out
10 11 12 13 14 15 16
0
10
15
20
5T.H.D. = 1%
0 dB = 775 mVrms
B
C
OFF
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 41 of 57
PB-C
PB-B
REC-OFF RPI
REC-OFF VRI
PB-OFF
REC-B RPI
REC-B VRI
REC-C RPI
REC-C VRI
Signal-to-Noise Ratio vs. Supply Voltage (HA12155)
90
80
70
60
50910111213141516
Supply voltage Vcc (V)
Signal-to-noise ratio S/N (dB)
E Vol : DAC Step No.18
Vin = 100 mVrms
CCIR/ARM
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 42 of 57
Signal-to-Noise Ratio vs. Supply Voltage (HA12157)
90
80
70
60
5010 11 12 13 14 15 16
Supply voltage V (V)
Signal-to-noise ratio S/N (dB)
VRI : DAC Step No.18
Vin = 100 mVrms
CCIR/ARM
PB-C
PB-B
REC-OFF RPI
REC-OFF VRI
RB-OFF
PB-B RPI
REC-B VRI
REC-C RPI
REC-C VRI
CC
Crosstalk vs. Frequency (R L)
Frequency (Hz)
10 100 1 k 10 k 100 k
–120
–100
–80
–60
–40
–20
Crosstalk (R L) (dB)
REC mode RPI in RECOUT out
Vin = +6 dB
V = 14 V
CC
C
B
OFF
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 43 of 57
Crosstalk vs. Frequency (R L)
Frequency (Hz)
10 100 1 k 10 k 100 k
–120
–100
–80
–60
–40
–20
CC
C
B
Crosstalk (R L) (dB)
OFF
PB mode RPI in PBOUT out
Vin = +6 dB
V = 14 V
Crosstalk (dB)
Crosstalk vs. Frequency
Frequency (Hz)
10 30 60 100 300 600 1 k 3 k 6 k10 k 30 k 60 k 100 k
–100
–80
–60
–40
–20
0
V = 14 V
CC
RPI PBI
RPI VRI
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 44 of 57
Crosstalk (dB)
Crosstalk vs. Frequency
Frequency (Hz)
10 30 60 100 300 600 1 k 3 k 6 k10 k 30 k 60 k 100 k
–100
–80
–60
–40
–20
0
V = 14 V
CC
PBI RPI
PBI VRI
Crosstalk (dB)
Crosstalk vs. Frequency
Frequency (Hz)
10 30 60 100 300 600 1 k 3 k 6 k 10 k 30 k 60 k 100 k
–100
–80
–60
–40
–20
0
V = 14 V
CC
VRI RPI
VRI PBI
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 45 of 57
Ripple Rejection Ratio vs. Frequency (REC mode)
Frequency (Hz)
Ripple rejection ratio R.R.R. (dB)
0
–10
–20
–30
–40
–50
10 50 100 500 1 k 5 k 10 k 50 k 100 k
V = 14 V RECOUT out
CC
C
B
OFF
Ripple Rejection Ratio vs. Frequency (PB mode)
Frequency (Hz)
Ripple rejection ratio R.R.R. (dB)
–10
–20
–30
–40
–50
–60
10 50 100 500 1 k 5 k 10 k 50 k 100 k
V = 14 V PBOUT out
CC
B
C
OFF
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 46 of 57
Gain, S/N and Vomax vs. DAC Step
20
10
0
–10
–20
0 20304010
60
70
80
90
100
DAC Step No.
V = 14 V f = 1 kHz
VRI in IAOUT out
CC
IAOUT gain Gv (dB)
S/N (dB)
Vo max (dB) 0 dB = –5.2 dBs T.H.D. = 1 %
Input level Vin (the value to be converted) (dBs)
20
16
12
8
4
0
2
–25
–15
–5
5
15
–20
–10
0
10
S/N
Vo max
Gv.Vin
(JIS A filter)
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 47 of 57
Total Harmonic Distortion vs. DAC Step
DAC Step
0 1020304050
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
0 dB = –5.2 dBs
Vcc = 14 V
f = 100 Hz
IAOUT output level = const
+10 dB
0 dB
–10 dB
Total Harmonic Distortion vs. DAC Step
DAC Step
0 1020304050
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
0 dB = –5.2 dBs
Vcc = 14 V
f = 1 kHz
IAOUT output level = const
+ 10 dB
0 dB
– 10 dB
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 48 of 57
Total Harmonic Distortion vs. DAC Step
DAC Step
0 1020304050
0.01
0.03
0.1
0.3
1.0
3.0
10
Total harmonic distortion T.H.D. (%)
0 dB = –5.2 dBs
Vcc = 14 V
f = 10 kHz
IAOUT output level = const
+ 10 dB
0 dB
– 10 dB
E. Vol Max. Input Level vs. Supply Voltage
16
14
12
10
8
6
4
2
08 1012141618
Supply voltage V (V)
CC
E. Vol Max. input level Vin max (IAOUT T.H.D. = 1 %) (dB)
f = 1 kHz
IAOUT out DAC Step No.= 42
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 49 of 57
Frequency (Hz)
Electronic Volume Gain vs. Frequency
Electronic volume gain (dB)
10 100 1 k 10 k 100 k
–70
–60
–50
–10
–30
–20
0
10
20
30
–40
DAC Step0
DAC Step20
DAC Step29
DAC Step36
DAC Step42
DAC Step47
DAC Step51
DAC Step56
DAC Step62
VRI in IAOUT out V = 14 V V in = –12 dBs
CC
Level Meter Output vs. Input Level (HA12155)
Input level Vin (dB)
Level meter output (V)
4.0
3.0
2.0
1.0
0
–80 –60 –40 –20 0 20 40
0 dB Range
–20 dB Range
0 dB = 580 mVrms
V = 14 V
f = 1 kHz
CC
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 50 of 57
Level Meter Output vs. Input Level (HA12157)
Input level Vin (dB)
Level meter output (V)
4.0
3.0
2.0
1.0
0
–80 –60 –40 –20 0 20 40
0 dB Range
–20 dB Range
0 dB = 775 mVrms
V = 14 V
f = 1 kHz
CC
Level Meter Output vs. Frequency
Frequency (Hz)
Level meter output (V)
3.2
3.0
2.8
2.6
2.4
2.2
2.0
20 30 100 300 1 k 3 k 10 k 30 k 100 k
V = 14 V
CC
0 dB Range Vin = 0 dB
–20 dB Range Vin = –20 dB
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 51 of 57
Level Meter Output vs. Supply Voltage
4.0
3.0
2.0
1.0
08 1012141618
0 dB Range Vin = 0 dB
–20 dB Range Vin = –20 dB
Supply voltage V (V)
CC
Level meter output (V)
f = 1 kHz
0 dB Range Vin = –20 dB
0 dB Range Vin = 12 dB
Equalizer Gain vs. Frequency
Frequency (Hz)
Equalizer gain (dB)
40
25
10 1 k30010 3 k 10 k 30 k 100 k
(5)
(3) (6)
(4)
(1) (2)
R
GP
R
GL
R
GH
R
F/Q
R
FQ
R
FM
(1) (2) (3) (4) (5) (6)
NN HN NC HC NM HM
33 k
33 k
33 k
51 k
51 k
100 k100 k100 k100 k100 k100 k
33 k 33 k 33 k 47 k 47 k
33 k 51 k 51 k 51 k 51 k
33 k 51 k 20 k 51 k 20 k
27 k 51 k 27 k 51 k 27 k
51 k 51 k 51 k 51 k
V = 14 V Vin = –20 dBs
CC
20 k
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 52 of 57
Output level Vout (dB)
Total hrmonic distortion T.H.D. (%)
Equalizer Total Harmonic Distortion vs. Output Level
–10 –505101520
0.1
0.3
1.0
3.0
10
30
V = 14 V
0 dB = –5 dBs
Rload = 10 k
R = 33 k
R = 33 k
R = 100 k
R = 33 k
R = 51 k
R = 51 k
CC
GL
GH
FM
GP
F/Q
FQ
Ω
Ω
Ω
Ω
Ω
Ω
: 15 kHz
: 10 kHz
: 6.3 kHz
: 3.15 kHz
: 1 kHz
: 315 Hz
Ω
35
30
25
20
15
10
55k 10 k 30 k 100 k 1 M
300 k
Equalizer Amplifier Gain (GL) vs. R
R ( )
Equalizer amplifier gain GL (dB)
at R = 33 k
V out = Ð5 dBs
Ω
GP
F/Q
Ω
Ω
f = 315 Hz
f = 1 kHz
V = 14V
R = R = 33 k
R = R = 51 k
R = 100 k
CC
GH
FQ
FM
GL
Ω
Ω
GL
GL
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 53 of 57
Equalizer Amplifier Gain (GH) vs. R
GH
35
30
25
20
15
10
55k 10 k 30 k 100 k 1 M
300 k
R ( )
Equalizer amplifier gain GH (dB)
Ω
GH
at R = 33 k
Vout = Ð5 dBs
GH
CC
GL
GP
FQ
FM F/Q
Ω
Ω
ΩΩ
V = 14 V
R = 33 k
R = 16 k
R = R = 24 k
R = 390 k
f = 6.3 kHz
Ω
Equalizer Amplifier Gain (GP) vs. R
GP
50
45
40
35
30
25
205k 10 k 30 k 100 k 1 M
300 k
R ( )
Equalizer amplifier gain GP (dB)
Ω
GP
CC
GH GP
F/Q
FQ
FM
Ω
Ω
Ω
V = 14 V
R = R = 33 k
R = R = 51 k
R = 100 k
f = 19 kHz
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 54 of 57
Equalizer Cut off Frequency (FM) vs. R
FM
100 k
30 k
10 k
3 k
1 k
300
5 k 10 k 30 k 100 k 300 k 1 M
R ( )
FM
Ω
Equalizer cut off frequency FM (Hz)
V = 14 V
R = 120 k
R = 7.5 k
R = R = 24 k
R = 16 k
CC
GL
GH
FQ
GP F/Q
Ω
ΩΩ
Ω
Equalizer Peak Frequency vs. R
FQ
300 k
100 k
30 k
10 k
3 k
2 k
5 k 10 k 30 k 100 k 300 k 1 M
R ( )
FQ Ω
Equalizer peak frequency fo (Hz)
R =
F/Q Ω
Ω
Ω
Ω
Ω
Ω
12 k
24 k
51 k
100 k
200 k
390 k
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 55 of 57
Equalizer Q vs. R
FQ
15
10
5
05 k 10 k 30 k 100 k 300 k 1 M
R ( )
FQ
Ω
Equalizer quality factor Q
R =
390 k
200 k
100 k
51 k
24 k
12 k
Ω
Ω
Ω
Ω
Ω
Ω
F/Q
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 56 of 57
Package Dimensions
Unit: mm
0.25
+ 0.11
– 0.05
0˚ – 15˚
1.78 ± 0.25 0.48 ± 0.10
0.51 Min
2.54 Min 5.08 Max
19.05
57.6
58.5 Max
1.0
1
33
32
64
17.0
18.6 Max
1.46 Max
Hitachi Code
JEDEC Code
EIAJ Code
Weight
DP-64S
—
SC-553-64A
8.8 g
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 57 of 57
Disclaimer
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third pa r ty’s r ights, including
intellectual property rights, in conn ection with use of the information con tained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failur e or ma lf unction may directly threaten hum an life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for max imum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-
safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval f r om Hitach i.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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For further information write to:
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