TS4909IQT STMicroelectronics, TS4909IQT Datasheet

Page 1

Dual mode low power 150mW stereo headphone amplifier Features ■ No output coupling capacitors necessary ■ Pop-and-click noise reduction circuitry ■ Operating from V = 2.2V to 5.5V CC ■ Standby mode active low ■ Output power: – 158mW @5V, ...

Page 2

Contents Contents 1 Typical application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 ...

Page 3

TS4909 1 Typical application schematics Figure 1. Typical applications for the TS4909 Phantom ground configuration Single-ended configuration Table 1. Application component information Component Inverting input resistor that sets the closed loop gain in conjunction with R R in1,2 resistor also ...

Page 4

Absolute maximum ratings and operating conditions 2 Absolute maximum ratings and operating conditions Table 2. Absolute maximum ratings Symbol V Supply voltage CC V Input voltage i T Storage temperature stg T Maximum junction temperature j R Thermal resistance junction ...

Page 5

TS4909 3 Electrical characteristics Table 4. Electrical characteristics at V (unless otherwise specified) Symbol Parameter No input signal, no load, single-ended I Supply current CC No input signal, no load, phantom ground Standby I No input signal, R STBY current ...

Page 6

Electrical characteristics Table 5. Electrical characteristics at V with GND = 0V, T Symbol Parameter No input signal, no load, single-ended I Supply current CC No input signal, no load, phantom ground Standby I No input signal, R STBY current ...

Page 7

TS4909 Table 6. Electrical characteristics at V with GND = 0V, T Symbol Parameter Supply No input signal, no load, single-ended I CC current No input signal, no load, phantom ground Standby I No input signal, R STBY current THD+N ...

Page 8

Electrical characteristics Table 7. Index of graphics Open-loop frequency response Output swing vs. power supply voltage THD+N vs. output power THD+N vs. frequency Output power vs. power supply voltage Output power vs. load resistance Power dissipation vs. output power Crosstalk ...

Page 9

TS4909 Figure 2. Open-loop frequency response 150 gain 125 100 -25 Ω RL= =25°C AMB - Frequency (Hz) Figure 4. Open-loop frequency response 150 gain 125 100 75 50 ...

Page 10

Electrical characteristics Figure 8. THD+N vs. output power 10 Phantom Ground Ω F=1kHz, RL=16 Av=-1, Tamb=25°C 1 Vcc=5V BW=20Hz-120kHz Vcc=3V 0.1 Vcc=2.6V 0.01 1E-3 1E-3 0.01 Output Power (mW) Figure 10. THD+N vs. output power 10 Phantom Ground Ω F=1kHz, ...

Page 11

TS4909 Figure 14. THD+N vs. output power 10 Single Ended Ω F=1kHz, RL=32 Av=-1, Tamb=25°C 1 BW=20Hz-120kHz Vcc=5V 0.1 Vcc=3V Vcc=2.6V 0.01 1E-3 1E-3 0.01 Output Power (mW) Figure 16. THD+N vs. output power 10 Phantom Ground Ω F=1kHz, RL=16 ...

Page 12

Electrical characteristics Figure 20. THD+N vs. output power 10 Single Ended Ω F=1kHz, RL=16 Av=-4, Tamb=25°C Vcc=5V 1 BW=20Hz-120kHz Vcc=3V 0.1 Vcc=2.6V 0.01 1E-3 1E-3 0.01 Output Power (mW) Figure 22. THD+N vs. output power 10 Single Ended Vcc=5V Ω ...

Page 13

TS4909 Figure 26. THD+N vs. frequency 1 Single Ended Ω , RL=16 Av=-1 BW=20Hz-120kHz T =25°C AMB 0.1 Vcc=3V Po=40mW Vcc=2.6V Po=30mW 0.01 0.002 100 20 Frequency (Hz) Figure 28. THD+N vs. frequency 1 Phantom Ground Ω , RL=16 Av=-4 ...

Page 14

Electrical characteristics Figure 32. Output power vs. power supply voltage 240 Phantom Ground Ω RL=16 , F=1kHz 200 Av=-1, T =25°C AMB BW=20Hz-120kHz 160 120 Power Supply Voltage (V) Figure 34. Output power vs. ...

Page 15

TS4909 Figure 38. Output power vs. load resistance 80 60 THD+N=10% 40 THD+N= Load Resistance ( Figure 40. Output power vs. load resistance 200 THD+N=10% 150 THD+N=1% 100 Load Resistance ...

Page 16

Electrical characteristics Figure 44. Power dissipation vs. output power Figure 45. Power dissipation vs. output power 120 Phantom Ground Vcc=3V, F=1kHz 100 THD+N< RL= Output Power (mW) Figure 46. Power dissipation ...

Page 17

TS4909 Figure 50. Crosstalk vs. frequency 0 Single Ended Ω Vcc=5V, RL=16 -20 Av=-4, Po=90mW T =25°C AMB -40 -60 OUT1 to OUT2 -80 -100 -120 100 20 Frequency (Hz) Figure 52. Crosstalk vs. frequency 0 Phantom ground Vcc=5V, Av=-1, ...

Page 18

Electrical characteristics Figure 56. Signal to noise ratio vs. power supply voltage 108 Phantom Ground A-weighted Filter 106 Av=-1, T =25°C AMB μ Cb=1 F 104 THD+N<0.4% 102 100 RL= Power Supply Voltage (V) Figure ...

Page 19

TS4909 Figure 62. Power supply rejection ratio vs. frequency 0 Phantom Ground, Inputs grounded -10 ≥ Ω μ Av=- Cb AMB -20 -30 -40 Vcc=2.6V -50 Vcc=3V -60 -70 -80 20 100 Frequency (Hz) Figure ...

Page 20

Electrical characteristics Figure 68. Current consumption vs. power supply voltage 4.0 3.5 3.0 2.5 2.0 1.5 T 1.0 T =-40°C 0.5 AMB 0 Power Supply Voltage (V) Figure 70. Current consumption vs. standby voltage ...

Page 21

TS4909 Figure 74. Current consumption vs. standby voltage 0.0 0.5 1.0 1.5 Standby Voltage (V) Figure 76. Power derating curves 3.5 3.0 Mounted on a 4-layer PCB 2.5 2.0 1.5 1.0 0.5 0 ...

Page 22

Application information 4 Application information 4.1 General description The TS4909 integrates two monolithic power amplifiers. The amplifier output can be configured to provide either single-ended (SE) capacitively-coupled output or phantom ground (PHG) capacitor-less output. shows schematics for each of these ...

Page 23

TS4909 Lower cut-off frequency The lower cut-off frequency F single-ended configuration, F The input capacitor C first-order high-pass filter. Assuming that F 3dB attenuation), the minimum value the single-ended configuration, the capacitor C equivalent to a first-order ...

Page 24

Application information 4.4 Power dissipation and efficiency Hypotheses: ● Voltage and current (V ● Supply voltage (V Regarding the load we have: and and 4.4.1 Single-ended configuration The average current delivered by the power supply voltage is: Figure 80. Current ...

Page 25

TS4909 and its value is: Note: This maximum value depends only on the 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 ...

Page 26

Application information The efficiency is the ratio between the output power and the power supply: The maximum theoretical value is reached when V 4.4.3 Total power dissipation The TS4909 is a stereo (dual channel) amplifier. It has two independent power ...

Page 27

TS4909 4.6 Wake-up time When the standby is released to turn the device ON, the bypass capacitor C immediately properly until the C 40ms (pop precaution) is called the wake-up time or t characteristics tables with C If ...

Page 28

Application information Example calculation: With R = 20kΩ and F in with standard value which gives a lower cut-off frequency equal to 20.4Hz. In this case, τ This value is sufficient with regards to the previous ...

Page 29

... 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. Figure 84. TS4909 footprint recommendation ...

Page 30

Package information Figure 85. DFN10 3x3 exposed pad package mechanical data Ref 30/32 Dimensions Millimeters Min. Typ. Max. 0.80 0.90 1.00 0.02 0.05 0.70 0.20 0.18 0.23 0.30 3.00 ...

Page 31

... TS4909 6 Ordering information Table 8. Order code Part number TS4909IQT 7 Revision history Table 9. Document revision history Date 1-Dec-2006 2-Jan-2007 26-Sep-2007 Temperature range -40°C to +85°C Revision 6 Release to production of the device. Correction of revision number of December revision (revision 6 7 instead of revision 5). 8 Updated Table 2: Absolute maximum ...

Page 32

... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...