Document
HA12179F
Audio Signal Processer for Car Deck and Cassette Deck (Dolby B-type NR with PB Amp)
ADE-207-136 1st Edition Apr. 1994 Description
HA12179F is silicon monolithic bipolar IC providing Dolby noise reduction system*, line mute, music sensor and PB equalizer system in one chip.
Functions
• Line mute • PB equalizer • Dolby B-NR • Music sensor × 2 channel × 2 channel × 2 channel × 1 channel
Features
• Different type of PB equalizer characteristics selection (normal/chrome or metal) is available with fully electronic control switching built-in. • Line mute ON/OFF is available. • Changeable to Foward, Reverse-mode for PB head with fully electronic control switching built-in. • Available to change music sensing level by external resistor. • Music sensing level selection is available with fully electronic control switching built-in. • Available to change frequency response of music sensor. • NR-ON/OFF and REC/PB fully electronic control switching built-in. • Pin compatible of HA12163 series except for 4 and 39 Pins. * Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby Laboratories Licensing Corporation is required for the use of this IC.
HA12179F
Ordering Information
Package HA12179F QFP 56 PB-OUT level 387.5 mVrms REC OUT level 300 mVrms Dolby level 300 mVrms
PB-OUT level above shown is typical value when adjusting Dolby level at Rec-out with NR-off mode.
Rev.1, Apr. 1994, page 2 of 40
LINE OUT (L) RECOUT (L) PB OUT (L) + 41 MUTE 27 MS GND 26 25
×1
EQOUT (L) 40 RIP 39 38 37 36 35 34 33 32
Block Diagram
42
43
FFI 31 30 29 NOI MS VREF 28
120/70
44 DOLBY B-NR
45
– +
46 24 FF NO
F/R 47 VRER (L)
+ VCC
48
49 GND
+ –
DET MSV 23 CC VCC 22 21 D GND 20 MSOUT
50 GND MS AMP.
×1
LPF
– +
To Microcomputer
51
19 DOLBY B-NR 18 17 16 MUTE 15 4 5 6 7 8 9 10 11 12 13 14
MS GV F/R 120µ/70µ MUTE ON/OFF REC/PB NR ON/OFF
52 VREF (R) F/R 53
+
54
–
55
120/70 2 BIAS 3
56
1
EQOUT (R) PBOUT (R) LINEOUT (R) RECOUT (R)
Rev.1, Apr. 1994, page 3 of 40
HA12179F
HA12179F
Pin Discription (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table show typical value.)
Pin No. 2 41 Terminal name TAI Zin DC voltage Equivalent circuit Description Tape input
100 kΩ VCC/2
VCC/2
5 38 25 10
MUI
Mute circuit input
MSI NR DET — 2.5 V
Music sensor rectifier input Time constant pin for rectifier
33 3 BIAS — 0.28 V Reference current input
GND
24
MS DET
—
VCC
Time constant pin for rectifier
GND
40
RIP
—
VCC/2
Ripple filter
Rev.1, Apr. 1994, page 4 of 40
HA12179F
Pin Discription (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table show typical value.) (cont)
Pin No. 43 56 Terminal name EQ OUT Zin — DC voltage Equivalent circuit VCC/2
VCC
Description Equalizer output
GND
6 37 30
PB OUT
Play back (Decode) output
MS VREF
Reference voltage buffer output Music sensor amp. output Reference voltage buffer output
26 47 52 12 31 4 39 44
MA OUT VREF
REC OUT
Recording (Encode) output
LINE OUT
Mute circuit output
EQ OUT-M
—
VCC/2
VCC
Equalizer output (Metal)
GND
55
Rev.1, Apr. 1994, page 5 of 40
HA12179F
Pin Discription (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table show typical value.) (cont)
Pin No. 21 Terminal name MS OUT Zin — DC voltage Equivalent circuit —
MS VCC
Description Music sensor output to MPU
D GND
22 23 20 27 49 50 48 51
VCC MS VCC D GND MS GND GND
—
VCC 0.0 V
—
Power supply
—
—
Digital (Logic) ground Music sensor ground Ground
FIN
—
VCC/2
PB-EQ input for forward
46 53 45 54
RIN
PB-EQ input for reverse
NFI
Negative feedback terminal of PBEQ amp.
28
NOI
Negative feedback input for normal speed Negative feedback input for FF or REW
29
FFI
Rev.1, Apr. 1994, page 6 of 40
HA12179F
Pin Discription (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table show typical value.) (cont)
Pin No. 14 Terminal name ON/OFF Zin DC voltage Equivalent circuit Description Mode control input
22k
122 kΩ —
100k D GND GND
15 16 17 18 19 1 7 8 9 11 13 32 34 35 36 42
REC/PB MUTE 120 µ/70 µ F/R MS GV NC No connection
Absolute Maximum Ratings
Item Supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC max PT Topr Tstg Ratings 16 400 –40 to +85 –55 to +125 Unit V mW °C °C Ta ≤ 85 °C Note
Note: Operating voltage range is VCC = 6.8 to 16.0 V
Rev.1, Apr. 1994, page 7 of 40
HA12179F
Electrical Characteristics (Ta = 25 °C Dolby Level 300 mVrms, VCC = 9.0 V)
Item Quiescent current Input amp. gain B-type encode boost Symbol IQ GvIA TAI ENC-2 k (1) ENC-2 k (2) ENC-5 k (1) ENC-5 k (2) Signal handling VO max THD CT RL (1) CT RL (2) MUTE ATT Gv EQ 1 k Min 6.5 21.2 2.8 7.0 1.7 6.7 12.0 64.0 — 65.0 50.0 70.0 37.0 Typ 12.0 22.2 4.3 8.5 3.2 8.2 13.0 70.0 0.05 80.0 60.0 85.0 40.0 36.0 32.0 600 0.05 0.7 Max 17.5 23.2 5.8 10.0 4.7 9.7 — — 0.3 — — — 43.0 39.0 35.0 — 0.3 1.5 mVrms THD = 1%, f = 1 kHz % µVrms Vin = 0.6 mVrms, f = 1 kHz Rg = 680 Ω DIN-AUDIO.