TS489

Manufacturer Part NumberTS489
DescriptionPop-free 120mW stereo headphone amplifier
ManufacturerSTMicroelectronics
TS489 datasheet
 


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Features
Pop and click noise protection circuitry
Operating range from V
CC
Standby mode active low (TS488) or high (TS489)
Output power:
– 120mW @5V, into 16Ω with 0.1% THD+N
max (1kHz)
– 55mW @3.3V, into 16Ω with 0.1% THD+N
max (1kHz)
Low current consumption: 2.7mA max @5V
Ultra low standby current consumption: 10nA
typical
High signal-to-noise ratio
High crosstalk immunity: 102dB (F = 1kHz)
PSRR: 70dB typ. (F = 1kHz), inputs grounded
@5V
Unity-gain stable
Short-circuit protection circuitry
Available in lead-free MiniSO-8 & DFN8
2mm x 2mm
Description
The TS488/9 is an enhancement of TS486/7 that
eliminates pop and click noise and reduces the
number of external passive components.
The TS488/9 is a dual audio power amplifier
capable of driving, in single-ended mode, either a
16Ω or a 32Ω stereo headset.
Capable of descending to low voltages, it delivers
up to 31mW per channel (into 16Ω loads) of
continuous average power with 0.1% THD+N in
the audio bandwidth from a 2.5V power supply.
An externally-controlled standby mode reduces
the supply current to 10nA (typ.). The unity gain
stable TS488/9 is configured by external gain-
setting resistors.
September 2006
Pop-free 120mW stereo headphone amplifier
= 2.2V to 5.5V
Applications
Headphone amplifier
Mobile phone, PDA, computer motherboard
High-end TV, portable audio player
Rev 4
TS488-TS489
TS488IST - MiniSO-8
1
1
1
8
8
8
VCC
VCC
VCC
OUT (1)
OUT (1)
OUT (1)
2
2
2
7
7
7
OUT (2)
OUT (2)
OUT (2)
VIN (1)
VIN (1)
VIN (1)
BYPASS
BYPASS
BYPASS
3
3
3
6
6
6
VIN (2)
VIN (2)
VIN (2)
5
5
5
4
4
4
GND
GND
GND
SHUTDOWN
SHUTDOWN
SHUTDOWN
TS488IQT - DFN8
Vcc
Vcc
Vcc
1
1
1 1
8 8
8
8
OUT
OUT
OUT
(2)
(2)
(2)
OUT
OUT
OUT
2
2 2
2
V
V
V
7
7
7 7
(1)
(1)
(1)
IN (2)
IN (2)
IN (2)
V
V
V
6
6 6
6
Shutdown
Shutdown
Shutdown
3 3
3
3
IN (1)
IN (1)
IN (1)
GND
GND
GND
Bypass
Bypass
Bypass
4 4
4
4
5 5
5
5
TS489IST - MiniSO-8
1
1
8
8
VCC
VCC
OUT (1)
OUT (1)
2
2
7
7
OUT (2)
OUT (2)
VIN (1)
VIN (1)
BYPASS
BYPASS
3
3
6
6
VIN (2)
VIN (2)
SHUTDOWN
SHUTDOWN
4
4
5
5
GND
GND
TS489IQT - DFN8
Vcc
Vcc
OUT
OUT
1 1
1
8
8 8
(2)
(2)
OUT
OUT
2 2
2
7 7
7
V
V
(1)
(1)
IN (2)
IN (2)
Shutdown
Shutdown
V
V
3
3 3
6
6 6
IN (1)
IN (1)
4 4
4
5 5
5
GND
GND
Bypass
Bypass
www.st.com
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TS489 Summary of contents

  • Page 1

    ... Features ■ Pop and click noise protection circuitry ■ Operating range from V CC ■ Standby mode active low (TS488) or high (TS489) ■ Output power: – 120mW @5V, into 16Ω with 0.1% THD+N max (1kHz) – 55mW @3.3V, into 16Ω with 0.1% THD+N max (1kHz) ■ ...

  • Page 2

    ... Power dissipation and efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.2 Total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.3 Lower cut-off frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.4 Higher cut-off frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.5 Gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.6 Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.7 Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.8 Wake-up time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.9 POP performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Connecting the headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.1 MiniSO-8 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.2 DFN8 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 2/32 TS488-TS489 ...

  • Page 3

    ... TS488-TS489 1 Typical application schematic Figure 1. Typical application for the TS488-TS489 Table 1. Application component information Component Inverting input resistor that sets the closed loop gain in conjunction with R R in1,2 This resistor also forms a high pass filter with C C Input coupling capacitor that blocks the DC voltage at the amplifier’s input terminal. ...

  • Page 4

    ... Operating free air temperature range oper Load capacitor Standby voltage input: V TS488 active, TS489 in standby STBY TS488 in standby, TS489 active Thermal resistance junction to ambient R MiniSO-8 thja DFN8 1. The minimum current consumption (I temperature range. 2. When mounted on a 4-layer PCB. ...

  • Page 5

    ... THD+N < 0.4%, 20Hz ≤ F ≤ 20kHz R = 32Ω 1kHz F = 20Hz to 20kHz R = 32Ω 16Ω icm CC Electrical characteristics Min. Typ. Max 1000 for TS489, 10 1000 = 32Ω 32Ω 16Ω 120 L = 16Ω 100 130 L 0.3 0 0.23 4.53 4 ...

  • Page 6

    ... V L THD+N < 0.4%, 20Hz ≤ F ≤ 20kHz R = 32Ω 1kHz F = 20Hz to 20kHz R = 32Ω 16Ω icm CC TS488-TS489 (1) Min. Typ. Max. 1.8 10 1000 for TS489, 10 1000 = 32Ω 32Ω 16Ω 16Ω 0.3 0 0.15 3.03 3.12 0.28 2.82 2.97 ...

  • Page 7

    ... V L THD+N < 0.4%, 20Hz ≤ F ≤ 20kHz R = 32Ω 1kHz F = 20Hz to 20kHz R = 32Ω 16Ω icm CC Electrical characteristics Min. Typ. Max. 1.8 10 1000 for TS489, 10 1000 = 32Ω 32Ω 16Ω 16Ω 0.3 0 0.12 2.3 2.36 0.22 2.15 2.25 100 ...

  • Page 8

    ... Total harmonic distortion plus noise vs. frequency Output power vs. load resistance Output power vs. power supply voltage Output voltage swing vs. power supply voltage Current consumption vs. power supply voltage Current consumption vs. standby voltage Crosstalk vs. frequency 8/32 Description TS488-TS489 Figure Figure 2 to Figure 11 Figure 12 to Figure 13 Figure 14 ...

  • Page 9

    ... TS488-TS489 Figure 2. Open-loop frequency response 125 100 phase -25 -50 - Frequency (Hz) Figure 4. Open-loop frequency response 125 gain 100 phase -25 -50 - Frequency (Hz) Figure 6. Open-loop frequency response 125 100 phase -25 -50 - ...

  • Page 10

    ... Figure 13. Power derating curves MiniSO8 3 4-layer PCB 100 125 150 ° C) TS488-TS489 Open-loop frequency response gain Vcc=5V RL=32 CL=400pF T =25°C AMB phase Frequency (Hz) Vcc=5V RL=600 gain T =25°C AMB phase ...

  • Page 11

    ... TS488-TS489 Figure 14. Signal to noise ratio vs. power supply voltage 110 A-weighted Filter Av=-1, T =25°C 108 AMB μ Cb=1 F THD+N<0.4% 106 104 102 100 RL= Power Supply Voltage (V) Figure 16. Signal to noise ratio vs. power supply voltage 106 A-weighted Filter Av=-2, T =25°C 104 AMB μ ...

  • Page 12

    ... Figure 25. Power supply rejection ratio vs. 0 -10 -20 Av=-4 -30 Av=-2 -40 -50 -60 -70 -80 1k 10k 20k 20 TS488-TS489 per channel Vcc=3.3V, F=1kHz, THD+N<1% Ω RL=16 Ω RL= Output Power (mW) frequency Inputs grounded, Av=-1, = Ω μ Cb =25°C AMB Vcc=2.5V Vcc=3 ...

  • Page 13

    ... TS488-TS489 Figure 26. Total harmonic distortion plus noise vs. output power 10 Ω F=1kHz =-1, T =25°C V AMB BW=20Hz-120kHz =3.3V 0 =2.5V CC 0.01 1E Output Power (mW) Figure 28. Total harmonic distortion plus noise vs. output power 10 Ω F=1kHz =-1, T =25°C V AMB BW=20Hz-120kHz 1 V =5V ...

  • Page 14

    ... Figure 35. Total harmonic distortion plus 10 1 0.1 0.01 100 200 1 Figure 37. Total harmonic distortion plus 10 =5V =3.3V 1 0.1 0. 0.01 ) RMS TS488-TS489 noise vs. output power Ω F=20kHz, R = =-2, T =25°C V AMB BW=20Hz-120kHz V =3. =2. Output Power (mW) noise vs. output power Ω F=20kHz, R ...

  • Page 15

    ... TS488-TS489 Figure 38. Total harmonic distortion plus noise vs. output power 10 Ω F=1kHz =-4, T =25°C V AMB BW=20Hz-120kHz =3.3V CC 0.1 V =2.5V CC 0.01 1E Output Power (mW) Figure 40. Total harmonic distortion plus noise vs. output power 10 Ω F=1kHz, R = =-4, T =25°C V AMB ...

  • Page 16

    ... Figure 47. Total harmonic distortion plus 1 0.1 RMS RMS 0.01 1E-3 1k 10k 20k 20 Figure 49. Total harmonic distortion plus 1 0.1 0.01 1E-3 1k 10k 20k 20 TS488-TS489 noise vs. frequency Ω = BW=20Hz-120kHz T =25°C AMB Vcc=2.5V, Po=12mW Vcc=3.3V, Po=25mW Vcc=5V, Po=60mW 100 1k Frequency (Hz) noise vs. frequency Ω =16 ...

  • Page 17

    ... TS488-TS489 Figure 50. Total harmonic distortion plus noise vs. frequency 1 Ω = BW=20Hz-120kHz T =25°C AMB 0.1 Vcc=2.5V, Po=20mW Vcc=3.3V, Po=40mW 0.01 Vcc=5V, Po=100mW 1E-3 20 100 Frequency (Hz) Figure 52. Total harmonic distortion plus noise vs. frequency 1 Ω =600 A =- BW=20Hz-120kHz T =25°C AMB 0.1 Vcc=2.5V, Vo=0.7V RMS Vcc=3 ...

  • Page 18

    ... F=1kHz L T =25°C AMB BW=20Hz-120kHz THD+N=10% THD+N= Power Supply Voltage (V) supply voltage T = 85° 25°C AMB AMB T = -40°C AMB Power Supply Voltage (V) voltage TS489, T TS489, T TS489, T 0.5 1.0 1.5 Standby Voltage ( =85°C AMB =25°C AMB =-40°C AMB V =2.5V CC 2.0 2.5 ...

  • Page 19

    ... 0.0 Figure 67. Crosstalk vs. frequency 0 -20 -40 -60 OUT1 to OUT2 -80 -100 -120 1k 10k 20k 20 Electrical characteristics voltage TS489, T TS489, T TS489, T 0.5 1.0 1.5 2.0 2.5 Standby Voltage (V) voltage TS489, T TS489, T TS489, T AMB 0.5 1.0 1.5 2.0 Standby Voltage (V) Ω Vcc=2.5V, RL=32 Av=-1, Po=12mW T =25°C AMB OUT2 to OUT1 OUT1 to OUT2 100 1k Frequency (Hz) =85° ...

  • Page 20

    ... OUT1 to OUT2 -80 -100 -120 1k 10k 20k 20 Figure 73. Crosstalk vs. frequency 0 -20 -40 OUT1 to OUT2 -60 -80 -100 -120 1k 10k 20k 20 TS488-TS489 Ω Vcc=3.3V, RL=32 Av=-1, Po=25mW T =25°C AMB OUT2 to OUT1 OUT1 to OUT2 100 1k Frequency (Hz) Ω Vcc=5V, RL=32 Av=-1, Po=60mW T =25°C AMB OUT1 to OUT2 OUT2 to OUT1 100 ...

  • Page 21

    ... TS488-TS489 Figure 74. Crosstalk vs. frequency 0 Ω Vcc=3.3V, RL=16 Av=-4, Po=40mW -20 T =25°C AMB -40 OUT2 to OUT1 -60 -80 -100 -120 100 20 Frequency (Hz) Figure 76. Crosstalk vs. frequency 0 Ω Vcc=5V, RL=16 Av=-4, Po=100mW -20 T =25°C AMB -40 OUT2 to OUT1 -60 -80 -100 -120 20 100 Frequency (Hz) Figure 75. Crosstalk vs. frequency 0 -20 -40 OUT1 to OUT2 -60 -80 -100 ...

  • Page 22

    ... Icc (t) L Icc AVG 0 T supply diss supply 2V CC ------------------ - diss π ∂P diss ∂ P OUT and I ). out out ω sin OUT ( ) PEAK ---------------- - πR L 3T/2 2T Time ( ) AVG ( ) P W – OUT ( ) P W – OUT OUT 0 = TS488-TS489 ...

  • Page 23

    ... TS488-TS489 and its value is: Note: This maximum value depends only on power supply voltage and load values. The efficiency is the ratio between the output power and the power supply: The maximum theoretical value is reached when V 4.2 Total power dissipation The TS488/9 is stereo (dual channel) amplifier. It has two independent power amplifiers. ...

  • Page 24

    ... It must be taken in account that the CL and a roll-off 40db forms a low-pass filter with a -3dB cut-off frequency -------------------------------------------------- CH ⋅ 2π R feed 100k 10k Ω Rfeed=40k 1k Ω Rfeed=80k 100 0.01 0.1 Cfeed TS488-TS489 output capacitor 10k Ω 100 10 0 μ Cout ( F) ⁄ decade. . Assuming CH 1 ⋅ ...

  • Page 25

    ... The input capacitor C lower the value of C 4.7 Standby mode When the standby mode is activated an internal circuit of the TS488 (TS489) is charged (see Figure 82). A time required to change the internal circuit is a few microseconds. Figure 82. Internal equivalent schematic of the TS488 (TS489) in standby mode R ⎛ ...

  • Page 26

    ... If the C b must be charged should be less then 6.7ms 20kΩ and ------------------------------------- - CL ⋅ 2π R TS488-TS489 is charged specified in the electrical WU [ms;μ μ F) voltage is not equal to 0V, the b . The size less than 20ms. To follow this 330nF ...

  • Page 27

    ... TS488-TS489 With the values above, the result this case, τ This value is sufficient with regard to the previous formula, thus we can state that the pop is imperceptible. Connecting the headphones Generally headphones are connected using jack connectors. To prevent a pop in the headphones when plugging in the jack, a pulldown resistor should be connected in parallel with each headphone output ...

  • Page 28

    ... JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. ackage 5.1 MiniSO-8 p 28/32 TS488-TS489 ...

  • Page 29

    ... TS488-TS489 ackage 5.2 DFN8 p DIM. MIN. 0. 0.20 D2 1.45 E2 0.75 L 0.225 D E aaa bbb ccc D QFN8 (2x2) MECHANICAL DATA mm. TYP MAX. MIN. 0.55 0.60 0.020 0.90 1.00 0.031 0.02 0.05 0.15 0.25 0.30 0.008 1.60 1.70 0.057 0.90 1.00 0.030 0.325 0.425 0.009 2.00 2.00 0.15 0.10 0. INDEX AREA (D/2 xE/2) aaa TOP VIEW ccc C SEATING PLANE 8 NX SIDE VIEW ...

  • Page 30

    ... Ordering information 6 Ordering information Table 8. Order codes Part number TS488IST TS488IQT TS489IST TS489IQT 30/32 Temperature range Package MiniSO-8 DFN8 -40°C to +85°C MiniSO-8 DFN8 TS488-TS489 Packing Marking K488 K88 Tape & reel K489 K89 ...

  • Page 31

    ... First release corresponding to the product preview version. Removal of typical application schematic on first page (it appears in Figure 1 on page 3). 2 Minor grammatical and formatting corrections throughout. Update of marking. 3 Update of DFN8 package height. Editorial update. Revision corresponding to the release to production of the TS488 - 4 TS489. Revision history Changes 31/32 ...

  • Page 32

    ... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 32/32 Please Read Carefully: © 2006 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com TS488-TS489 ...