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CXA2566M
Headphone Stereos
Description This is a bipolar IC designed for headphone stereos. It provides functions such as automatic volume limiter control, bass boost, standby, headphone driver and others. Features * Low quiescent current (3.2mA at 2.4V Vcc ) * Thermal shutdown circuitry at 120C * Headphone driver (30mW at 2.4V Vcc for 16 load) * Bass boost function (9dB) * Standby function * Wide operating voltage (1.8 to 5V) * Automatic volume limiter control (100mVrms) * Uses SOP 16 pin package Application Headphone Stereos Structure Bipolar silicon monolithic IC Absolute Maximum Ratings (Ta = 25C) * Supply voltage VCC 7 * Operating temperature Topr -20 to +75 * Storage temperature Tstg -65 to +150 * Allowable power dissipation PD 500 Operating Conditions Supply voltage 16 pin SOP (Plastic)
V C C mW
VCC
1.8 to 5
V
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
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E98830A91-PS
CXA2566M
Block Diagram and Pin Configuration
GND
1
16 VCC
Standby
2
Standby
Bass sw
15 Bass
Pwr_1
3
14 Left
PVCC
4
Bass Boost
13 C
PGND
5
12 Right
Pwr_2
6
Vref
11 Vref
Det
7
10 RF_In
AVLS
8
Detector
Ripple
9
RF_Out
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CXA2566M
Pin Description Pin No. 1 5 Symbol GND PGND Pin Voltage 0 0
VCC 2k
Equivalent circuit
Description Pre-amp ground Power amp ground
2
Standby
1
2k
20k 124 2 100k GND
Standby switch H: Operate L: Standby
VCC v
3 6
Pwr_1 Pwr_2
1.2 1.2
v
3k 3 6
Left channel output Right channel output
GND
4 16
PVCC VCC
0 0
10k 10k vv VCC
Power amp supply Pre-amp supply
7
Det
<1
v 80k 124
7
Detector output
GND
VCC
20k 124
8
AVLS
0
100k
8
AVLS switch H: AVLS on L: AVLS off
GND
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CXA2566M
Pin No.
Symbol
Pin Voltage
Equivalent circuit
VCC
Description
v
32k
vv
9 10
RF_Out RF_In
2.2 2.2
368k
100k 124
124 9 10
Ripple filter output
GND
10k
10k vv
VCC
11
Vref
1.2
v
124 11
Voltage reference output
GND
10k
10k vv
VCC
12 14
Right Left
1.2
124 12 25k 14
Right channel input Left channel input
GND
VCC v
32k 124
13
C
1.2
v
32k
13
Low pass filter output
GND
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CXA2566M
Pin No.
Symbol
Pin Voltage
Equivalent circuit
Description
VCC 20k
15
Bass
1
20k 124 15 100k 100k GND
Bass switch H: Bass on L: Bass off
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CXA2566M
Electrical Characteristics Items Current consumption 1 Current consumption 2 Voltage gain 1 Voltage gain 2 AVLS output 1 AVLS output 2 Symbols ICC1 ICC2 AV1 AV2 VAVLS1 VAVLS2 Sw Condition Sw1 Sw2 Sw3 Sw4 Sw5 Off Off Off Off On On Off Off Off Off Off Off Off Off Off On On On Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off On Off Off Off Off Off Off Off Off Off On On Off Off Off Off On On On On On On Off Off Off Off On On On 50mVp-p -20dBm BB on, Av at 100Hz and 1kHz Vin Vrr Measurement conditions
On 250mVp-p On On Off Off -20dBm VO = -10dBv THD = 10% VO = 0.3Vrms Rg = 0, A-weight
Maximum Power PO1 Distortion factor Noise output Ripple Rejection Channel Separation Standby off Standby switch Bass on Bass switch AVLS on AVLS switch THD Vno RR CS Vstandby Istandby VBass IBass Vavls Iavls
On/ Off/ off on Off Off Off Off Off Off Off Off Off Off Off Off
Vstandby = 1V
VBass = 1V
Vavls = 1V
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CXA2566M
(Unless otherwise specified. Ta = 25C, VC = 2.4V, RL = 16, f = 1kHz, standby off, AVLS off, BB off) No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Items Current consumption 1 Current consumption 2 Voltage gain 1 Voltage gain 2 AVLS output 1 AVLS output 2 Symbols ICC1 ICC2 AV1 AV2 VAVLS1 VAVLS2 Vin = -20dBm BB on, Av at 100Hz and 1kHz AVLS on, Vin = 50mVp-p AVLS on, Vin = 250mVp-p VCC = 2.4V, THD = 10% VO = 0.3Vrms Rg = 0 fR = 1kMz, VRR = -20dBm VO = -10dBv Measurement conditions Standby on Min. -- -- 11 8 86 86 15 -- -- 36 -46 Typ. 18 3.2 11.78 9.22 103 104 30 0.13 -84 61 -50 1 Vstandby = 1V 15 1 VBass = 1V 30 1 Vavls = 1V 15 Max. 23 5 12 10 116 116 -- 0.3 -80 -- -- Units A mA dB dB mVrms mVrms mW % dBm dB dB V A V A V A
Maximum Power PO1 Distortion factor Noise output Ripple Rejection Channel Separation Standby off Standby switch Bass on Bass switch AVLS on AVLS switch THD Vno RR1 CS1 Vstandby Istandby VBass IBass Vavls Iavls
1 Values are measured with respect to input source.
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CXA2566M
Electrical Characteristics Measurement Circuit
1 V2 OFF S2 2 R2 16 ON C3 220 3
GND
VCC 16 S3 OFF
Standby
Bass 15 ON V3 OFF C9 1 S5
Pwr1
Left 14 ON C8 0.1 Vin
4 VCC Vrr
PVCC
C 13 C7 1 S4 ON OFF
5 R1 16 C2 220 6 C1 10 7 V1 ON OFF S1 8
PGND
Right 12 C6 10
Pwr2
Vref 11 C5 10
Det
RF_In 10 C4 1
AVLS
RF_Out
9
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CXA2566M
Description of Operation 1) Det Pin (Pin 7) This is the external pin for the detector during AVLS mode. The attack time is determined by the internal charging buffer and the external capacitor. The recovery time is determined by both the 80k impedance inside the IC and the external capacitor. 2) RF_Out (Pin 9) / RF_In (Pin 10) These are the two external pin for the power supply's ripple filter. It provides a regulated 0.92 x Vcc to the internal circuits. The rejection ratio is determined by the resistors inside the IC and the two external capacitors.
32k 100k 368k 10 RF_In 9 RF_Out VCC Regulated
VCC
3) C Pin (Pin 13)
32k Left 32k Out Left 32k 32k 32k Right 21k 32k
65k
32k Out Right 32k 32k 32k
The bass boost circuitry is designed to provide a 9dB gain at 100Hz for C = 0.1F. The cut off frequency is determined by: fcutoff = 1 2 x 16k x C
13 C
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CXA2566M
Application Circuit
GND 1: Standby Off 0: Standby On 220 2.4V Standby 220 Pwr_1
VCC 1 16 1: Bass On 0: Bass Off 2 Standby Bass sw 15 Bass 1 3 14 Left 0.1 13 C 1
PVCC 16 PGND 16 220 Pwr_2 10 Det 1: AVLS On 0: AVLS Off
4
Bass Boost
5
12
Right 10
6
Vref
11
Vref 10
7
10 RF_In 1
AVLS
8
Detector
Ripple
9 RF_Out
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
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CXA2566M
Example of Representative Characteristics
Circuit current (at no signal)
4.0 3.9 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 23.0 22.0 21.0 20.0 19.0 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0
Frequency characteristic
Bass Boost On C = 0.1F
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Gain [dB]
ICC [mA]
10
100
1k Frequency [Hz]
10k
100k
VCC [V]
Crosstalk vs. Frequency
-40 -41 -42 -43 -44 -45 -46 -47 -48 -49 -50 -51 -52 -53 -54 -55 -56 -57 -58 -59 -60 10
Distortion factor vs. Input characteristics
Distortion factor [%] 10 100 1k Frequency [Hz] 10k 100k
Crosstalk [dB]
1
0.1
0.01 0.001
0.01 Input [Vpk]
0.1
1
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CXA2566M
Package Outline
Unit: mm
16PIN SOP (PLASTIC)
+ 0.4 9.9 - 0.1
+ 0.4 1.85 - 0.15
16
9 0.15 + 0.2 0.1 - 0.05
+ 0.3 5.3 - 0.1
7.9 0.4
0.45 0.1
1.27
+ 0.1 0.2 - 0.05
0.24 M
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE PACKAGE MASS SOP-16P-L01 SOP016-P-0300 LEAD MATERIAL COPPER ALLOY 0.2g LEAD TREATMENT EPOXY RESIN SOLDER PLATING
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0.5 0.2
1
8
6.9

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