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ICs for Radio-Cassette, Cassette Deck
AN7500FHQ
Audio signal processing IC for 1.5 V headphone stereo
s Overview
The AN7500FHQ is a single chip IC optimum for a 1.5 V headphone stereo system including pre-amp., power amp. and Dolby B type noise reduction circuit. Current consumption in a Dolby circuit off mode has been drastically reduced and an operating supply voltage has also been lowered to 0.98 V. Much fewer external components have been realized due to an integration of audio signal processing system into a single chip circuitry in a small outline package and space saving mounting of a set.
9.000.40 7.000.20 36 37 25 24 (0.75) 7.000.20 9.000.40 13 1 12 0.20-0.05
+0.10
Unit: mm
48
(0.75)
0.50
(0.625) 1.400.10 1.70 max.
s Features
* Reduction by power consumption of approximately 35% as compared with conventional products, contributing to low power consumption of a set. * Eliminating the DC/DC converter so far needed for conventional system due to 1.5 V single power supply, and reducing approx. 40% of external components. This contributes to space saving in a set. * Built-in standby switch to reduce consumption current considerably.
Seating plane
0.15-0.05
+0.10
(1.00)
LQFP048-P-0707
s Applications
* Headphone stereo
(0.625) 0.100.10
0 to 10 0.500.20
1
AN7500FHQ
s Block Diagram
ICs for Radio-Cassette, Cassette Deck
33 N.R. out (L)
37 38 VREF
PB out (L) 39
160 86 k 100 k VREF
25 PWR in (R)
24 23 22 21
27 PWR in (L)
N.R. in (L)
29 SB out (L)
36
35
IREF
34
32
31
30
28
40 25 k
REV in (L) 41 42 FWD in (L) VREF FWD in (R)
26
200 k 20 19
PWR out (R) VCC GND
43 44
Bias
18 PWR out (L) 17 AGC 16 Ripple filter VREF VREF 100 k 15 14 86 k 13
REV in (R) 45
25 k 46 47 48
N.R. FWD REV On Off mute
200 k
PB out (R)
160
Control
STBY
10
Low BST 11
N.R. in (R) 3
ASC
N.R. out (R)
2
Power mute
SB out (R)
12
1
2
4
5
6
7
8
9
ICs for Radio-Cassette, Cassette Deck
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Description FWD/REV/pre-mute control Noise reduction on/off control N.R. decoder input (R) N.R. decoder output (R) Side-chain filter (R) Weighting amp. filter (R) Control voltage ripple filter (R) Sub-buffer amp. output (R) Sub-buffer amp. input (R) Sub-buffer amp. on/off control Low boost on/off control Power mute on/off control Standby on/off control Ripple filter input Ripple filter base pin Ripple filter output AGC time constant Power output (L) GND pin Positive power supply Power output (R) Low boost capacitor pin 2 LPF2 capacitor pin Low boost capacitor pin 1 Pin No. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
AN7500FHQ
Description Power input (R) LPF1 capacitor pin Power input (L) Sub-buffer amp. input (L) Sub-buffer amp. output (L) Control voltage ripple filter (L) Weighting amp. filter (L) Side-chain filter (L) N.R. decoder output (L) N.R. decoder input (L) Reference current resistance pin MS LPF C pin MS output MS filter pin Playback amp. output (L) Playback amp. negative feedback input (L) Playback amp. REV input (L) Playback amp. FWD input (L) Reference voltage output Playback amp. FWD input (R) Playback amp. REV input (R) Playback amp. negative feedback input (R) Playback amp. output (R) Reference voltage input
s Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation
*2 *1
Symbol VCC ICC PD Topr Tstg
Rating 2.1 20 249 -20 to +70 -55 to +125
Unit V mA mW C C
Operating ambient temperature Storage temperature
*1
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: Ta = 75C
3
AN7500FHQ
s Recommended Operating Range
Parameter Supply voltage Symbol VCC
ICs for Radio-Cassette, Cassette Deck
Range 0.98 to typ. 1.2 to 2.0
*
Unit V
Note) *: Supply voltage of VCC of 0.95 V to 0.98 V is permissible as long as it does not cause any abnormal operation such as oscillation.
s Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25C
Parameter Voltage gain Circuit current 1 Circuit current 2 Circuit current 3 Circuit current 4 Circuit current 5 Pre-amp. block Open-loop voltage gain Close-loop voltage gain Max. output voltage Total harmonic distortion Output noise voltage Channel separation FWD/REV crosstalk Ripple rejection factor GVO(PB) VO = -22.2 dBV GVC(PB) VO = -22.2 dBV Vomax(PB) THD = 1%, 30 kHz, LPF on THD(PB) VO = -22.2 dBV, 30 kHz, LPF on, GVC = 35 dB (NAB) VNO(PB) Rg = 2.2 k, IHF-A CS(PB) CT(PB) RR(PB) Sincgle ch. input, 1 kHz, BPF on, Rg = 2.2 k, VO = -22.2 dBV Single ch. input, 1 kHz, BPF on, Rg = 2.2 k, VO = -22.2 dBV Rg = 2.2 k, VRR = -32.2 dBV, fRR = 100 Hz, IRFO = 15 mA, BPF: 100 Hz, 1/4 OCT 61 32.5 120 37 51 43 73 34 210 0.2 -90 46 59 53 35.5 0.6 -76 dB dB mV % dBV dB dB dB Symbol GV ICC1 ICC2 ICC3 ICC4 ICC5 Conditions VO = -22.2 dBV VIN = 0, Rg = 2.2 k, L. BST off, N.R. off VIN = 0, Rg = 2.2 k, L. BST off, N.R. on Pout = 0.5 mW x 2-ch., RL = 32 Pout = 0.5 mW x 2-ch., RL = 32 , N.R. on STBY on Min 54 Typ 57 3.2 4.4 7.0 8.4 15 Max 60 5.9 7.1 11.2 12.8 30 Unit dB mA mA mA mA A
Mute attenuation amount
GMUTE(PB) Ratio to VO = -22.2 dBV, pre-mute on GV1(PW) VO = -22.2 dBV GV2(PW) L. boost on, VO = -22.2 dBV GV3(PW) L. boost on/off, f = 50 Hz, VIN = 65.2 dBV Pout THD = 10%, 30 kHz, LPF on THD(PW) Pout = 1 mW, 30 kHz, LPF on CS1(PW) Sincgle ch. input, 1 kHz, BPF, Rg = 0, VO = -22.2 dBV
-85
-70
dB
Heavy low sound + power amp. block Gain voltage 1 Gain voltage 2 Low frequency boost amount Rated output power Total harmonic distortion Channel separation 1 21 21.4 15 2.5 33 23 23.4 19 4.5 0.35 40 25 25.4 23 1.3 dB dB dB mW % dB
4
ICs for Radio-Cassette, Cassette Deck
AN7500FHQ
s Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25C (continued)
Parameter Symbol Conditions Min Typ Max -86 -82 Unit Heavy low sound + power amp. block (continued) Channel separation 2 Output noise voltage 1 Output noise voltage 2 Ripple rejection factor 1 CS2(PW) Sincgle ch. input, Low boost on, Rg = 0, VO = -22.2 dBV, 1 kHz, BPF VNO1(PW) Rg = 0, IHF-A VNO2(PW) Low boost on, Rg = 0, IHF-A RR1(PW) Rg = 0, VRR = -32.2 dBV, fRR = 100 Hz, IRFO = 15 mA, BPF: 100 Hz, 1/4 OCT RR2(PW) Low boost on, Rg = 0, VRR = -32.2 dBV, fRR = 100 Hz, IRFO = 15 mA, BPF: 100 Hz, 1/4 OCT RIN(PW) CB(PW) VO = -22.2 dBV VMUTE(PW) VIN = -32.2 dBV VAGC 25 60 31 -91 -86 72 dB dBV dBV dB
Ripple rejection factor 2
40
61
dB
Input resistance Channel balance Mute output voltage AGC level
7.2 -1.5
9.5 0 -96
12 1.5 -90
k dB dBV dBV
VIN = -45.2 dBV, f = 100 Hz, -17.3 -14.7 -13.1 RL = 32 , AGC level to be measured at 32 end. -30 0 30
Output DC step Dolby block Reference input level *1 Channel balance
DV(PW) PWR mute (pin 12) on/off VIN(NR) N.R.: Off, BEF: Off, f = 1 kHz, VO = -32.2 dBV CB(NR) (Calculation) channel ratio of the above VIN
mV
-33.9 -32.8 -31.7 -1 -2 0 0 1 2
dBV dB dB
N.R. decode characteristics 1 *2 G(NRD1) N.R.: On, BEF: Off, f = 10 kHz, VIN = -29.6 dB, Calculation NRD = VO +40 (dB) N.R. decode characteristics 2 *2 G(NRD2) N.R.: On, BEF: Off, f = 1 kHz, VIN = -23.9 dB, Calculation NRD = VO +30 (dB) N.R. decode characteristics 3 *2 G(NRD3) N.R.: On, BEF: Off, f = 1 kHz, VIN = -15.8 dB Calculation NRD = VO +20 (dB) N.R. decode characteristics 4 *2 G(NRD4) N.R.: On, BEF: Off, f = 10 kHz, VIN = -17.4 dB Calculation NRD = VO +20 (dB) N.R. decode characteristics 5 *2 G(NRD5) N.R.: On, BEF: Off, f = 10 kHz, VIN = 0.4 dB, Calculation NRD = VO (dB)
-2
0
2
dB
-3.0
0
3.0
dB
-2.5
0
2.5
dB
-2
0
2
dB
Note) *1: Adjust an input level to get an output level of -3.2 dBV at a measuring point (N.R. out) so that you can get 0 dB of reference input level. 2: VO in the calculating equation is the output level based on reference of 0 dB = -32.2 dBV (measuring point: N.R. out). *
5
AN7500FHQ
ICs for Radio-Cassette, Cassette Deck
s Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25C (continued)
Parameter Dolby block (continued) Total harmonic distortion 1 *3 Total harmonic distortion 2 *3 Total harmonic distortion 3 *3 (Signal handling) THD1(NR) N.R.: Off, BEF: On, f = 1 kHz, VIN = +10 dB, 30 kHz, LPF on THD2(NR) N.R.: On, BEF: Off, f = 1 kHz, VIN = +10 dB, 30 kHz, LPF on THD3(NR) N.R.: On, BEF: Off, f = 1 kHz, VIN = +12 dB VCC = 1.1 V, 30 kHz, LPF on 0.2 0.3 0.3 0.5 0.8 1 % % % Symbol Conditions Min Typ Max Unit
Signal to noise ratio, N.R. on *4 VNO(NR) N.R.: On, BEF: Off, Input pin Rg = 15 k, CCIR/ARM filter Sub-buffer filter characteristic *5 Ripple filter block Ripple rejection factor RR VCC = 1.1 V, VRR = -32.2 dBV fRR = 100 Hz, IRFO = 15 mA BPF: 100 Hz, 1/4 OCT VCC = 1.0 V, IRFO = 15 mA VCC = 1.0 V Power mute on, at V37 = 0.6 V[p-0] Power mute off, at V37 = 0.6 V[p-0] GVOP2 N.R.: Off, BEF: On/off, f = 6.3 kHz, VIN = 0 dB
70
72
dB
-12
-8
dB
24
30
dB
DC output voltage Bias block DC output voltage AMS block Music detection level 1 Music detection level 2 Control block Standby-off voltage Standby-on voltage Standby pin current Power mute-on threshold Power mute-off threshold Power mute pin current FWD/REV/pre-mute low threshold FWD/REV/pre-mute high threshold FWD/REV/pre-mute pin current Low-boost on threshold Low-boost pin current N.R. on threshold N.R. off threshold
VRPF
0.89
0.94
V
VREF
0.68 -50.6 -66.6 0.75 1.05 1.1 0.8
0.76 -49 -65 16 20 9 20
0.83 -47.4 -63.4
V
VBS VMS
dBV dBV
VSTOFF Low: Power on VSTON ISTBY High/open: Power off V13 = 0 V
0.4 45 0.3 40 0.1 18 0.3 40 0.4
V V A V V A V V A V A V V
VMTON Low: Power mute on VMTOFF High/open: Power mute off ISW12 VTH1L VTH1H ISW1 VLBON ISW11 VNRON V12 = 0.1 V Low: REV High: Pre-mute on V1 = 0.1 V Low: Low boost on V11 = 0.1 V Low: N.R. on
VNROFF High/open : N.R. off
Note) *3: Measuring point: SB out *4: Measuring point: N.R. out *5: Attenuation amount referred to sub-buffer off (measuring point: SB out).
6
ICs for Radio-Cassette, Cassette Deck
AN7500FHQ
s Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25C (continued)
Parameter Control block (continued) N.R. pin current Sub-buffer on threshold Sub-buffer off threshold Sub-buffer pin current ISW2 VSBON V2 = 0.1 V Low: SB on V10 = 0.1 V 0.8 8 20 16 0.4 40 A V V A Symbol Conditions Min Typ Max Unit
VSBOFF High/open: SB off ISW10
s Terminal Equivalent Circuits
Pin No. 1 120 k
1
Equivalent circuit VRPF
Description FWD/REV/pre-mute: FWD/REV/pre-mute control Pre-mute High voltage: VCC- 0.1 < V1-19 FWD Pin open REV Low voltage: V1-19 < 0.1 N.R. cont.: N.R. on/off control N.R. off Pin open or high voltage: 0.8 V < V2-19 < VCC +0.3 V N.R. on Low voltage: - 0.3 V < V2-19 < 0.4 V
Waveform/voltage (at VCC = 1.2 V)
120 k GND 2 Approx. 2 A
2
VRPF
RIN = 33 k 0.8 V
200 100 k 100 k 100 k
GND 3 34 VRPF VREF
Pin 3 34
Pin 3: N.R. in (R) Pin 34: N.R. in (L): N.R. decoder input
30 k 50 k GND RIN = 30 k (typ.) DC 0.78 V
7
AN7500FHQ
s Terminal Equivalent Circuits (continued)
Pin No. 4 33 Equivalent circuit
ICs for Radio-Cassette, Cassette Deck
Description Pin 4: N.R. out (R) Pin 33: N.R. out (L): N.R. decoder output
Waveform/voltage (at VCC = 1.2 V) RO = 300 (typ.) DC 0.78 V
VREF
Pin 4 33
VRPF 6.7 k
11.6 k 7.5 k GND 5 32 VREF
Pin 5 32
VRPF
Pin 5: SC in (R) Pin 32: SC in (L): Side chain input
RIN: Variable according to inpuit signal DC 0.78 V
200
EVR
GND 6 31 Pin 6: WAMP (R) Pin 31: WAMP (L): Weighting amp. filter pin DC 0.78 V
VREF
VRPF
Pin 6 270 31
GND 7 30 Pin 7: VC LPF (R) Pin 30: VC LPF (L): Control voltage ripple filter pin 0V (Add external resistor without signal)
VRPF
Pin 7 30
GND
8
ICs for Radio-Cassette, Cassette Deck
s Terminal Equivalent Circuits (continued)
Pin No. 8 29 100 k
Pin 8 29
AN7500FHQ
Equivalent circuit VRPF
Description Pin 8: SB out (R) Pin 29: SB out (L): Sub-buffer amp. output When pin 10 is open or of high voltage and output is connected to VREF with 100 k, the buffer amp. does not operate.
Waveform/voltage (at VCC = 1.2 V) At SB on RO = 160 (typ.) At SB off RIN = 100 k (typ.) DC 0.78 V
VREF
160
GND 9 28 Pin 9: SB in (R) Pin 28: SB in (L): Sub-buffer amp. input RIN = 86 k (typ.) DC 0.78 V
VREF 86 k
Pin 9 28
VRPF
GND 10
VRPF 50 k
10
20 k 20 k 20 k
SB CNT: Sub-buffer amp. on/off control SB off Pin open or high voltage: 0.8 V < V10-19 < VCC +0.3 V SB on Low voltage: - 0.3 V < V10-19 < 0.4 V
RIN = 6 k DC 0.78 V
GND
11 VRPF 50 k
11
L-BST CNT: Low boost on/off control L-BST on Pin open L-BST off Low voltage: - 0.3 V < V10-19 < 0.3 V
DC 0 V
10 k 50 k GND
9
AN7500FHQ
s Terminal Equivalent Circuits (continued)
Pin No. 12 VRPF 50 k
12
ICs for Radio-Cassette, Cassette Deck
Equivalent circuit
Description PWR mute CNT: Power mute on/off control PWR-mute off Pin open or high voltage: VCC - 0.15 V < V12-19 < VCC +0.3 V PWR-mute on Low voltage: - 0.3 V < V12-19 < 0.3 V
Waveform/voltage (at VCC = 1.2 V) DC 0 V
50 k GND 13 VRPF 100 k
13
100 k
STBY CNT: Standby on/off control STBY off Pin open or high voltage: 0.75 V < V13-19 < VCC +0.3 V STBY (on state) on Low voltage: - 0.3 V < V13-19 < 0.4 V
DC 0 V
GND 14 70 k VCC RF in: Ripple filter reference voltage input DC 1.0 V
14
14 k 15 350 k GND 100 k RF base: Ripple filter DC 0.47 V
16
15
VRPF : Ripple filter reference voltage output
DC 1.13 V
16
10
ICs for Radio-Cassette, Cassette Deck
s Terminal Equivalent Circuits (continued)
Pin No. 17 Equivalent circuit VRPF Description AGC TAU: AGC time constant
AN7500FHQ
Waveform/voltage (at VCC = 1.2 V)
17
GND 18 21 60 k
Pin 18 21
VCC
Pin 18: PWR out (L) Pin 21: PWR out (R): Power amp. voltage output
4 k
DC 0.6 V
GND 19 20 22 15 k 7.5 k
22
VRPF
GND pin VCC power supply pin L-BST C: Low boost capacitor pin
0V 1.2 V
7.5 k VREF
15 k
DC 0.78 V
GND 23 45 k 15 k
23
VRPF
LPF2-C: LPF2 capacitor pin
7.5 k VREF GND
DC 0.78 V
11
AN7500FHQ
s Terminal Equivalent Circuits (continued)
Pin No. 24 3 k Equivalent circuit VRPF 30 k
ICs for Radio-Cassette, Cassette Deck
Description L-BST C1: Low boost capacitor pin
Waveform/voltage (at VCC = 1.2 V)
24
30 k VREF
3 k
DC 0.78 V
GND 25 27
VRPF
Pin 25: PWR in (R) Pin 27: PWR in (L): Power amp. input
25
90 k
12 k
10 k VREF VRPF
2 k VREF GND
DC 0.78 V AC -30 dBm
26
27
90 k 10 k GND VRPF
LPF1-C: LPF capacitor pin
DC 0.78 V
26
GND
35
VRPF
IREF : Reference current resistor pin
DC 0.1 V
35
GND
12
ICs for Radio-Cassette, Cassette Deck
s Terminal Equivalent Circuits (continued)
Pin No. 36 VRPF 10 k Equivalent circuit Description MS LPF-C: Music interval detection LPF capacitor pin
AN7500FHQ
Waveform/voltage (at VCC = 1.2 V)
36
5.7 k GND 37 VCC MS out: Music interval detection output
37
400 k GND 38 VRPF 180 k 180 k
38
MS-C: Music interval detection filter capacitor pin
DC 0.78 V
180 k VREF
180 k GND
13
AN7500FHQ
s Terminal Equivalent Circuits (continued)
Pin No. 39 47 Equivalent circuit
ICs for Radio-Cassette, Cassette Deck
Description Pin 39: PB out (L) Pin 47: PB out (R): Playback amp. output
Waveform/voltage (at VCC = 1.2 V)
VCC
Pin 39 47
DC 0.6 V AC -30 dBm
GND
40 46 Pin 40: PB NF (L) Pin 46: PB NF (R): Playback amp. negative feedback input DC 0.78 V 1 kHz -65 dBm
VCC
Pin 40 46
GND
41 45 Pin 41: REV in (L) Pin 45: REV in (R): Playback amp. REV input
DC 0.78 V AC -65 dBm
VCC
42 44 Pin 42: FWD in (L) Pin 44: FWD in (R): Playback amp. FWD input
200 k
Pin 41 42 44 45
25 k VREF GND
14
ICs for Radio-Cassette, Cassette Deck
s Terminal Equivalent Circuits (continued)
Pin No. 43
VRPF
AN7500FHQ
Equivalent circuit
Description VREF : Reference voltage output
Waveform/voltage (at VCC = 1.2 V) DC 0.78 V
43
GND
48
VRPF
VREF in: Reference voltage input
DC 0.78 V
48
GND
15
AN7500FHQ
s Application Circuit Example
N.R. out (L)
ICs for Radio-Cassette, Cassette Deck
0.33 F
3 300 pF
0.01 F
1 F
0.01 2.2 k F
1 F
390 k
IREF
15 k
0.1 F
1 F
10 k
2 700 pF
36
35
34
33
32
31
30
29
28
27
26
25
1 F
PWR in (R)
PWR in (L)
N.R. in (L)
SB out (L)
37
0.047 F 1 F
PB out (L) 0.022 F
160 86 k 100 k VREF VREF
24 23 22 21
6.8 F 0.15 F 6.8 F 0.1 F 2.2 100 F 32
38 39 40 25 k 41
6.8 k
180 33 F 1 F
200 k 20 19 18
PWR out (R) VCC
REV in (L) FWD in (L)
42
1 F 22 F
VREF
43 44
100 F
GND PWR out (L) 2.2 32
Bias
17 0.1 F AGC 200 k VREF VREF 100 k Ripple filter 16
FWD in (R) REV in (R) 180
1 F
0.047 F 22 F
45 25 k 1 F 33 F 46
6.8 k
15 14
33 F
2SB1295
0.022 F PB out (R)
47
1 F
48
2.2 F
N.R. FWD REV On Off mute
86 k 160
Control
13
On
Off
STBY
10
11
On On Off Low BST
0.01 F
Off
0.33 F
3 300 pF
On 1 F
1 F
1 F
FWD REV
390 k
0.01 F
2 700 pF
Off Power mute On
VCC
Mute
Off
15 k
N.R. in (R)
N.R. out (R)
2.2 k
Note) Dolby and double D logos are the trademarks of Dolby Laboratories Licensing Corporation. The use of this product requires the prior approval of Dolby Laboratories Licensing Corporation.
16
SB out (R)
ASC
12
1
2
3
4
5
6
7
8
9

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