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ICs for Audio Common Use
AN7504SB
Pre-amp. and power amp. IC for 1.5 V headphone stereo
I Overview
1 28
0.30.1
Unit: mm
The AN7504SB is a low voltage operation headphone amp. IC for headphone C-cassette stereo. It incorporates tape selector, pre-amp. , soft AGC bass-boost circuit, etc.
I Features
14
0.10.1
15
(0.4) 7.20.3 9.30.3
SSOP028-P-0375A Note) The package of this product will be changed to lead-free type (SSOP028-P-0375E). See the new package dimensions section later of this datasheet.
I Block Diagram
PWR-in (L) Tape-select Pre-out (R) Pre-out (L)
PWR-in (R)
28
27
26
25
24
23
22
21
20
19
18
17
16
FWD/REV Pre-mute
AGC
Bias
Ripple filter
Control
10
11
12
STB/PWR mute 13
PWR-out (L)
PWR-out (R)
REV/FWD/ 14 Pre-mute
1
2
3
4
5
6
7
8
Pre-in (R)
9
GND
Pre-in (L)
VCCP
VREF
VRPF
15
Low BST
2.050.2
0.90.1
* Headphone stereo
0.2 +0.1 -0.05
I Applications
0.90.1
* Low voltage operation (0.98 V to 2.0 V) * Tape selector switch built-in * Low frequency boost function with soft AGC
0.8
11.60.3
Publication date: December 2001
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1
AN7504SB
I Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation
*2 *1
Symbol VCC ICC PD Topr Tstg
Rating 2.1 20 42 -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. Keep VCC (0.95 V to 0.98 V) free from any abnormal operation such as oscillation. *2: The power dissipation shown is the value for Ta = 75C. For the independent IC without a heat sink.
I Recommended Operating Range
Parameter Supply voltage Symbol VCC Range 0.98 to typ. 1.2 to 2.0 Unit V
I Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32 , Ta = 25C
Parameter Voltage gain Circuit current 1 Pre-amp. block Closed circuit voltage gain Max. output voltage Total harmonic distortion Output noise voltage Mute attenuation GVC(PB) THD(PB) VNO(PB) VO = -22.2 dBV VO = 22.2 dBV, 30 kHz LPF on GVC = 35 dB (NAB) RG = 2.2 k, 1HF-A 32.5 120 34 210 0.2 -90 -85 35.5 0.6 -76 -70 dB mV % dBV dB VOmax(PB) THD = 1%, 30 kHz LPF on Symbol GV ICC1 Conditions VO = -22.2 dBV VIN = 0, RG = 2.2 k, LBST off Min 54 Typ 57 2.2 Max 60 5.3 Unit dB mA
GMUTE(PB) Ratio as VO = -22.2 dBV Pre-mute on VO = -22.2 dBV LBOOST on, VO = -22.2 dBV THD = 10%, 30 kHz LPF on POUT = 1 mW, 30 kHz LPF on RG = 0.1, 1HF-A LBOOST on, RG = 0, 1HF-A VO = -22.2 dBV VIN = -45.2 dBV, f = 100 Hz RL = 32 AGC level: 32 edge measure
Boost low sound and power amp. block Voltage gain 1 Voltage gain 2 Rating output power Total harmonic distortion Output noise voltage 1 Output noise voltage 2 Channel balance Mute output voltage AGC level GV1(PW) GV2(PW) POUT THD(PW) VNO1(PW) VNO2(PW) CB(PW) VAGC 21 21.4 2.5 -1.5 23 23.4 4.5 0.35 -91 -86 0 -96 25 25.4 1.3 -86 -82 1.5 -90 dB dB mW % dBV dBV dB dBV dBV
VMUTE(PW) VIN = -32.2 dBV
-17.3 -14.7 -13.1
2
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AN7504SB
I Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32 , Ta = 25C (continued)
Parameter Ripple filter block Ripple rejection ratio 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 Low: Power off Open: Power on (Power mute on) VSTOFF = 1/2VCC - V13 Open: Power mute off VMTOFF = VCC - V13 Low: REV High: Pre-mute on VTHIH = VCC - V1 Low: LBOOST off Low: Tape-select off 24 30 dB Symbol Conditions Min Typ Max Unit
DC output voltage Bias block DC output voltage Control block Threshold voltage at standby on Threshold voltage at standby off Bias voltage at power mute off Low threshold at FWD/REV/pre-mute High threshold at FWD/REV/pre-mute Low threshold at low boost off Low threshold at tape select off * Design reference data
VRPF VREF VSTON VSTOFF
0.89
0.94
0.83
V
0.68 - 0.2
0.76
V
0.1 0.2
V V
VMTOFF VTH1L VTH1H VLBOFF VTPOFF

0.1 0.1 0.1 0.3 0.3
V V V V V
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter Circuit current 2
Symbol ICC2
Conditions POUT = 0.5 mW, x 2-ch., RL = 32
Min
Typ 6.5
Max 11.2
Unit mA
Boost low sound and power amp. block Input resistance RIN(PW) 7.2 9.5 12 k
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AN7504SB
I Terminal Equivalent Circuits
Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of IC.
Pin No. 1 Pins 1,3 +
Equivalent circuit VCC Pins 26, 28
Description PB-in (R): Playback amp. input
Waveform (typ.)
200 k 25 k VREF
Pins 25, 27 DC 0.78 V AC -66.2 dBV GND VREF: Reference voltage output DC 0.78 V
2 2
GND
4
+
GND 3 4 5 70 k + 14 k 100 k 6 6 7 GND 7 GND VRPF: Ripple filter reference voltage output DC 1.13 V 350 k GND RF-base: Ripple filter DC 0.47 V Refer to pin 1 Refer to pin 2 PB-in (L): Playback amp. input VREF-in: Reference voltage input VCC RF-in: Ripple filter reference voltage input Refer to pin 1 DC 0.78 V DC 1.0 V
5
4
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AN7504SB
I Terminal Equivalent Circuits (continued)
Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of IC.
Pin No. 8
Equivalent circuit
VRPF
Description AGC-TAU: AGC time constant
Waveform (typ.)
8
GND
9 VCC Pins 9, 12 60 k
PWR-out (L): Power amp. voltage output
+
4 k GND 10 11 12 13 Refer to pin 9 GND: GND pin VCC: Power supply pin PWR-out (R): Power amp. voltage output
DC 0.6 V AC -8.8 dBV 0V 1.2 V Refer to pin 9
VRPF 220 k 13
STBY, PWR mute CNT: PWR-mute off Pin open: VCC - V13 < 0.1 V PWR-mute on - 0.2 V < 1/2VCC - V13 < 0.2 V STBY on V13 < 0.1 V
GND
14 120 k 14 120 k GND VRPF FWD/REV/Pre-mute: FWD/REV/pre-mute control Pre-mute Voltage high: VCC - 0.1 < V14-19 FWD Pin open REV Voltage low: V14-19 < 0.1
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AN7504SB
I Terminal Equivalent Circuits (continued)
Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of IC.
Pin No. 15
Equivalent circuit
Description
Waveform (typ.) DC 0 V
VRPF 50 k 15 10 k 50 k GND
L-BST CNT: Low boost on/off control L-BST on Pin open L-BST off Voltage low: - 0.3 V < V11-19 < 0.3 V
16
15 k 16 7.5 k
+
L-BST C: Low boost Capacitor pin
7.5 k
15 k
DC 0.78 V
VREF GND
17
45 k 15 k 17 + 7.5 k VREF VRPF
LPF2-C: LPF2 Capacitor pin
DC 0.78 V
GND
VRPF 30 k
18
3 k + 18
L-BST C1: Low boost Capacitor pin
30 k VREF
3 k
DC 0.78 V
GND
6
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AN7504SB
I Terminal Equivalent Circuits (continued)
Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of IC.
Pin No. 19
Equivalent circuit
Description
Waveform (typ.)
VRPF + 90 k 10 k VREF
PWR-in (R): Power amp. input
19
12 k
2 k VREF
LPF1-C: LPF C pin
DC 0.78 V AC -32.2 dBV DC 0.78 V
20
VRPF 21 90 k 10 k
21
GND 20
PWR-in (L): Power amp. input
Refer to pin 19
GND
22
Pins 22, 23
Tape-select on/off: Tape select driver
23
GND
Tape-select on/off: Tape select driver Tape-select on/off CNT: Tape select driver Driver on Voltage high Driver off V24 < 0.3 V PB-out (L): Playback amp. output
24
360 k 20 k
VRPF
24
GND
25 Refer to pin 1
DC 0.6 V AC -32.2 dBV
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7
AN7504SB
I Terminal Equivalent Circuits (continued)
Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of IC.
Pin No. 26
Equivalent circuit Refer to pin 1
Description PB-NF(L): Playback amp. negative feedback input
Waveform (typ.)
DC 0.78 V 27 28 Refer to pin 1 Refer to pin 1 PB-OUT(R): Playback amp. input PB-NF(R): Playback amp. negative feedback input Refer to pin 25 Refer to pin 26
I Application Notes
1. Operation logic of control pin Pin 24 Tape select control Pin 14 Pre-amp. system control Low Off (Pins 22, 23 High) Low Reverse Input pin Output pin Pin 1 Pin 25 Pin 3 Pin 27 Pin 13 Power amp. system control Low 1 Standby on High or Open On (Pins 22, 23 Low) Open Forward Input pin Output pin Pin 1 Pin 27 Pin 3 Pin 25 Low 2 Standby off, Mute on High Mute on High Mute
Low 1: Short-circuit to GND Low 2: 0.6 V application or short circuit to GND with 220 k
8
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AN7504SB
I Application Notes (continued)
2. Main characteristics 1. Pre-amp. output frequency characteristics
-10 VCC = 1.2 V -20
2. Distortion and amplitude at pre-amp. output Input Distortion/output voltage
10 VCC = 1.2 V f = 1 kHz Distortion 10
1
1
-30
-40
0.1 Output voltage
0.1
-50 10
100
1k
10k
100k
0.01 -60
-50
-40
0.01
Frequency (Hz)
Input amplitude (dBV)
3. Distortion and amplitude characteristics of headphone amp. Input Distortion/output voltage
10 VCC = 1.2 V f = 1 kHz RL = 32 Low boost off 10 -10 00
4. Headphone amp. Output Input
VCC = 1.2 V f = 100 Hz Low boost on 32 end DETC = 0.047 F
Output voltage (V)
Distortion (%)
1
1
Output (dBV)
-20
Distortion 0.1 Outpu voltage 0.1
-30
0.01 -60
-50
-40
-30
0.01 -20
-40 -70
-60
-50
-40
-30
Input amplitude (dBV)
Input amplitude (dBV)
-20
5. Headphone amp. Output Frequency
PWR system VCC = 1.2 V PL = 32 Low boost on
6. Distortion and amplitude at headphone amp. output Input Distortion/output voltage
10 VCC = 1.2 V f = 100 Hz RL = 32 Low boost on Distortion 10
Distortion (%)
Output (dBV)
-30
1
1
-40
0.1
Output voltage
0.1
-50 10
100
1k
10k
100k
0.01 -60
-50
-40
-30
0.01 -20
Frequency (Hz) SDC00029BEB
Input amplitude (dBV)
Output voltage (V)
Output voltage (V)
Output (dBV)
Distortion (%)
9
AN7504SB
I Application Notes (continued)
2. Main characteristics (continued) 7. Ripple filter output voltage (pin 7)
2.5
8. Ripple filter output voltage (Using at 15 mA of current)
2.5
2.0
2.0
V7 (V)
V7 (V)
1.5
1.5
1.0
1.0
0.5 0.5
1.0
1.5
2.0
2.5
0.5 0.5
1.0
1.5
2.0
2.5
V11 (V)
V11 (V)
9. VCC VREF
10. Pin 2 (VREF) at standby on/off and voltage at pin 7 (Ripple filter)
1.2
1.0
1.0
VREF (V)
0.5
V7 (V)
0.5
STBY on
0 0 1.0 2.0 2.5
0 0 0.5 1.0 1.2
VCC (V)
V13 (V)
11. Headphone amp. at mute on/off (Pin 9) output voltage
Headphone amp. output voltage V9 (V)
5
12. VCC I total
1.0
4
I total (mA)
Mute on Mute off
0.5 1.0
3
0.5
2
1
0 0
0 0 0.5
1
1.5
2
2.5
V13 (V)
V11 (V)
10
SDC00029BEB
R1 2.2 k C1 1 F
Pre-in (R)
C2 22 F R13 6.8 k
1 27
C25 1 F C26 0.022 F
28
C27 R14 33 F 180
VREF 2
Bias
R2 2.2 k
Pre-out (R)
Pre-in (L)
C3 1 F R11 6.8 k C4 2.2 F
3 4
C22 1 F
2.2 k 2.2 k R9 R10
26 25 24 23 22 21 20 19 18 17 16
Control
R8 2.7 k C21 0.022 F R7 2.7 k C20 0.022 F C23 0.022 F
R12 C24 33 F 180
I Application Circuit Examples
1. Application circuit example
Pre-out (L) Tape-select
FWD/REV Pre-mute
Note) *: The low VCE(SAT) PNP TR be used as TR.
C5 33 F
5 6
Ripple filter
TR*
Tape-select on : Open Tape-select off: Low
C6 22 F
7 8 9 10 11
VRPF
C7 0.47 F
C19 1 F
AGC
SDC00029BEB
C8 100 F R3 2.2 C10 47 F C11 100 F C9 0.1 F
Head-phone in (L)
C18 0.1 F
Head-phone out (L)
C17 1 F
GND
Head-phone in (R)
C16 6.8 F
VCCP 12
R4 2.2 C12 0.1 F STBY on
Head-phone out (R)
C15 0.15 F
PWR mute on R5
13 14
C14 6.8 F
PWR mute off 220 k REV FWD Pre-mute
15
R6 50 k Off C13 1 F
On
Base boost
REV : Low FWD : Open Pre mute: High
STBY on : Low1 PWR mute on : Low2 PWR mute off: Open
VCC1
AN7504SB
11
AN7504SB
I Application Circuit Examples (continued)
2. Evaluation board
Pre out L-ch. Pre out R-ch. Head-phone In L-ch. C14 C15 C16 C17 Head-phone In R-ch.
R10
R12 R7 R8 R11 C18 C19
R9
C23
C26 R13
R14
C22
C24
C27
C25
Base boost On Off Tape-select Off On VCC Off On Pre-amp. REV FWD Mute STBY Mute off Mute Head-phone
C10
C20
C21
R6 C13 15
28
C2
AN7504SB
R2
R1
14
1
C5
C3
C1
C7
C4
Pre-amp. in L-ch.
Pre-amp. in R-ch.
TR
C8 C6
C11 Head-phone Out L-ch. C12
Head-phone Out R-ch.
C9
I New Package Dimensions (Unit: mm)
* SSOP028-P-0375E (Lead-free package)
11.600.20 28 15 (1.05)
7.200.20
9.300.30
0.20-0.05
+0.10
(0.60)
0.80
Seating plane
0.100.10
2.050.20
R5
R4
R3
0 to 10 (0.40)
1
14 0.30+0.10 -0.05
Seating plane
12
SDC00029BEB
Request for your special attention and precautions in using the technical information and semiconductors described in this material
(1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuit examples of the products. It does not constitute the warranting of industrial property, the granting of relative rights, or the granting of any license. (3) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: * Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. * Any applications other than the standard applications intended. (4) The products and product specifications described in this material are subject to change without notice for reasons of modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (5) When designing your equipment, comply with the guaranteed values, in particular those of maximum rating, the range of operating power supply voltage and heat radiation characteristics. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, redundant design is recommended, so that such equipment may not violate relevant laws or regulations because of the function of our products. (6) When using products for which dry packing is required, observe the conditions (including shelf life and after-unpacking standby time) agreed upon when specification sheets are individually exchanged. (7) No part of this material may be reprinted or reproduced by any means without written permission from our company.
Please read the following notes before using the datasheets
A. These materials are intended as a reference to assist customers with the selection of Panasonic semiconductor products best suited to their applications. Due to modification or other reasons, any information contained in this material, such as available product types, technical data, and so on, is subject to change without notice. Customers are advised to contact our semiconductor sales office and obtain the latest information before starting precise technical research and/or purchasing activities. B. Panasonic is endeavoring to continually improve the quality and reliability of these materials but there is always the possibility that further rectifications will be required in the future. Therefore, Panasonic will not assume any liability for any damages arising from any errors etc. that may appear in this material. C. These materials are solely intended for a customer's individual use. Therefore, without the prior written approval of Panasonic, any other use such as reproducing, selling, or distributing this material to a third party, via the Internet or in any other way, is prohibited.
2001 MAR

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