TS4604IPT

TS4604 Stereo headset driver and analog audio line driver with integrated reference to ground Features ■ Operating from VCC = 3 V up to 4.8 V single supply operation ■ Line driver stereo differential inputs ■ External gain setting resistors ■ Space-saving package: TSSOP28 pitch 0.65 mm ■ Dedicated shutdown control per function ■ 100 mW headset drive into a 16 Ω load ■ 90 dB high PSRR on headset drive ■ Two internal negative supplies to ensure ground-referenced, headset and line driver capless outputs ■ Internal undervoltage mute ■ ■ ) s ( ct u d o )- s ( t c Pop-&-click reduction circuitry, thermal shutdown and output short-circuit protection ■ PDP/LCD TV ■ Set-top boxes ete r P e t e l o Pin connections (top view) Line driver 2 Vrms typ. Output voltage across entire supply voltage range Applications TSSOP28 du o r P l o Description s b O s b O +LDL 1 28 +LDR -LDL 2 27 -LDR OUTLDL 3 26 OUTLDR AGND 4 25 EUVP ENLD 5 24 PGND PVSSLD 6 23 PVCCLD CNLD 7 22 CPLD CNHP 8 21 CPHP PVSSHP 9 20 PVCCHP ENHP 10 19 PGND AGND 11 18 NC OUTHPL 12 17 OUTHPR -HPL 13 16 -HPR +HPL 14 15 +HPR The TS4604 is a stereo ground-referenced output analog line driver and stereo headset driver whose design allows the output DC-blocking capacitors to be removed, thus reducing component count. The TS4604 drives 2 Vrms into a 5 kΩ load or more. The device has differential inputs and uses external gain setting resistors. The TS4604 delivers up to 100 mW per channel into a 16 Ω load. All outputs of the TS4604 include ±8 kV human body model ESD protection cells. October 2010 Doc ID 17913 Rev 1 1/31 www.st.com 31 Contents TS4604 Contents 1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 2 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Characteristics of the line driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Characteristics of the headset driver . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 ) s ( ct u d o r P e 6.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 6.2 Use of ceramic capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.3 Flying and tank capacitor for the internal negative supply . . . . . . . . . . . . 18 6.4 Power supply decoupling capacitor (Cs) . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.5 Input coupling capacitor (Cin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.6 Range of the gain setting resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.7 Performance of CMRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.8 Internal and external undervoltage detection . . . . . . . . . . . . . . . . . . . . . . 21 t e l o ) (s P e 6.8.2 o s b O 7 t c u d o r 6.8.1 let s b O Internal UVLO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 External UVLO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.9 2nd order Butterworth low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6.10 ESD protection and compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 6.11 Pop-&-click circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 6.12 Start-up phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 6.13 Layout recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7.1 TSSOP28 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2/31 Doc ID 17913 Rev 1 TS4604 1 Absolute maximum ratings and operating conditions Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings (AMR) Symbol VCC Parameter Value Unit 5.5 V GND to VCC V Supply voltage (1) (2) Vin Input voltage enable & standby pin Vin Input signal voltage -2.5 to +2.5 V Toper Operating free-air temperature range -40 to + 85 °C Tstg Storage temperature -65 to +150 °C Tj Rthja Pd ESD Maximum junction temperature Thermal resistance junction to ambient 200 u d o Power dissipation Internally limited(4) Human body model for all pins except outputs Human body model for all output pins Pr e t e l Machine model Charge device model Latch-up ) s ( ct 150 (3) o s b Latch-up immunity O ) Lead temperature (soldering, 10sec) °C °C/W 2 8 kV 200 V 1500 V 200 mA 260 °C 1. All voltage values are measured with respect to the ground pin. s ( t c 2. The magnitude of the input signal must never exceed VCC + 0.3 V/GND - 0.3 V. 3. The device is protected from overheating by a thermal shutdown mechanism active at 150° C. u d o 4. Exceeding the power derating curves during a long period provokes abnormal operating conditions. Table 2. r P e Symbol let O o s b Operating conditions Parameter VCC Supply voltage Vicm Common-mode input voltage range RLD Line drive load resistor RHD Headset drive load resistor Rthja Thermal resistance junction-to-ambient (1) Value Unit 3 to 4.8 V From -1.4 to 1.4 V ≥5 kΩ ≥ 16 Ω 80 °C/W 2 1. With heatsink surface = 125 mm . Doc ID 17913 Rev 1 3/31 Typical application TS4604 2 Typical application Figure 1. Simplified application schematics in differential configuration setting R2 R1 2.2 µF 2.2 µF -LDR OUTLDR +LDR ) s ( ct >5 KΩ R1 R2 R2 R1 2.2 µF u d o 2.2 µF -LDL OUTLDL t e l o R2 TS4604 R2 R1 2.2 µF -HPR 2.2 µF ) (s +HPR R1 R2 P e 2.2 µF let o s b -HPL 1 6 /3 2 Ω OUTHPL +HPL 1 6 /3 2 Ω R1 R2 AGND Thermal shutdown UVLO AGND EUVP Power management ENHP ENLD PVCCHP 3 to 4.8 V 1 µF Negative charged pump line driver 1 µF 1 µF PGND PVSSLD PVSSHP CPHP R1= 10 kΩ, R2 = Av x R1 with R2 ≤ 100 k 3 to 4.8 V PVCCLD Negative charged pump headset 1 µF PGND >5 KΩ OUTHPR d o r R1 2.2 µF s b O t c u R2 O r P e +LDL R1 CNHP 1 µF CPLD CNLD 1 µF AM06138 4/31 Doc ID 17913 Rev 1 TS4604 Typical application Table 3. Pin descriptions Pin number I/O(1) Pin name 1 I +LDL Left line driver positive input channel 2 I -LDL Left line driver negative input channel 3 O OUTLDL 4 P AGND Analog line driver power ground 5 I ENLD Line driver enable input pin (active high) 6 O PVSSLD 7 I/O CNLD Line driver charge pump flying capacitor negative terminal 8 I/O CNHP Headset charge pump flying capacitor negative terminal 9 I/O PVSSHP 10 I ENHP Headset driver enable input pin (active high) 11 P AGND Headphone analog input power ground 12 O OUTHPL 13 I -HPL Left headset driver negative input channel 14 I +HPL Left headset driver positive input channel 15 I +HPR Right headset driver positive input channel 16 I -HPR Right headset driver negative input channel 17 O OUTHPR 18 P 20 P 21 I/O 22 Output from line drive charge pump PVCCHP ) s ( ct Output from headset drive charge pump u d o r P e Left headset driver output channel t e l o )- s b O Right headset driver output channel Not connected Headset driver power ground Headset driver power supply voltage(2) CPHP Headset charge pump flying capacitor positive terminal I/O CPLD Line driver charge pump flying capacitor positive terminal P PVCCLD P PGND Line driver power ground 25 I EUVP External undervoltage protection input pin 26 O OUTLDR 27 I -LDR Right line driver negative input channel 28 I +LDR Right line driver positive input channel e t e l 23 o s b 24 O PGND c u d o r P Left line driver output channel t(s NC 19 Pin description Line driver power supply voltage(2) Right line driver output channel 1. I = input, O = output, P = power 2. PVccHP and PVccLD are internally connected, so PVccHP must be equal to PVccLD. Doc ID 17913 Rev 1 5/31 Electrical characteristics TS4604 3 Electrical characteristics Table 4. Common part: VCC = +3.3 V, GND = 0 V, CPhp = CPld = 1 µF, Tamb = 25°C (unless otherwise specified) Symbol Parameters and test conditions Min. Typ. Max. Unit VIL VENHP and VENLD Input voltage low 38 40 43 % Vcc VIH VENHP and VENLD Input voltage high 57 60 66 % Vcc IIH High level input current (ENHP and ENLD) -1 1 µA IIL Low level input current (ENHP and ENLD) -1 1 µA 800 kHz Fosc Internal negative voltage switching frequency, all temperature range 400 550 Vup External undervoltage detection threshold 1.15 1.25 Ihyst External undervoltage detection hysteresis current Vhyst Pvcc_HP/LD Internal undervoltage detection hysteresis Vuvl Pvcc_HP/LD internal undervoltage detection – power up – power down Av Overall external gain (R2 ≤100 kΩ, R1 = R2/Av) bs O ) s ( t c u d o r P e t e l o s b O 6/31 Doc ID 17913 Rev 1 200 0 1 du 1.35 o r P 5 e t e ol ) s ( ct 2.8 2.6 V µA mV V 20 10 dB V/V TS4604 Table 5. Electrical characteristics Headset driver part: VCC = +3.3 V, GND = 0 V, ENHP = VCC, ENLD = GND, CPhp = CPld = 1 µF, Av = 1 (R1 = R2 = 10 kΩ), Tamb = 25°C (unless otherwise specified) Symbol Icc IENHP Parameters and test conditions Min. Typ. Max. Unit Supply current (no input signal, no load) 5 6.5 mA Headset overall standby current (no input signal): VENHP = GND VENHP = 38% VCC 1 5 100 µA 7 mV Vio Input offset voltage -7 0 Po Headphone output power: THD + N = 1% max, f = 1 kHz, BW = 22 kHz, RL = 16 Ω 45 65 Po Headphone output power: THD + N = 1% max, f = 1 kHz, BW = 22 kHz, RL = 32 Ω 30 45 THD + N PSRR tWU Total harmonic distortion + noise: RL = 16 Ω, Po = 60 mW, f = 20 Hz to 20 kHz, BW = 22 kHz Headphone power supply rejection ratio with AC inputs grounded: f = 217 Hz,Vripple = 200 mVpp u d o mW 0.05 % 90 dB 30 ms 20 µs -100 dB r P e t e l o Total wake-up time ) s ( ct mW tSTBY Standby time Xtalk Crosstalk headphone to line: Pout = 50 mW, RL = 16 Ω, f = 20 Hz to 20 kHz SNR Signal-to-noise ratio (A-weighting): RL = 16 Ω, Po = 60 mW 102 dB s ( t c -70 dB 7.6 µVRMS CMRR VN CL(1) )- s b O Common-mode rejection ratio: f = 20 Hz to 20 kHz, Vic = 200 mVpp du Output voltage noise: f = 20 Hz to 20 kHz, A-weighted o r P Capacitive load: RL = 16 Ω to 100 Ω RL > 100 Ω e t e ol 400 100 pF 1. Higher capacitive loads are possible by adding a serial resistor of 47 Ω in the line driver output. s b O Doc ID 17913 Rev 1 7/31 Electrical characteristics Table 6. Line driver part: VCC = +3.3 V, GND = 0 V, Av = 1 (R1 = R2 = 10 kΩ), ENLD = VCC, ENHP = GND, CPhp = CPld = 1 µF, RL = 10 kΩ, Tamb = 25°C (unless otherwise specified) Symbol Icc IENLD Vio VSWING PSRR tWU TS4604 Parameters and test conditions Supply current (no input signal, no load) Input offset voltage -7 Unit 5 6.5 mA 5 100 µA +7 mV 0 2.1 Line driver power supply rejection ratio with AC inputs grounded: f = 217 Hz, Vripple = 200 mVpp 90 Wake-up time from shutdown 30 SNR Signal-to-noise ratio (A-weighting): Vin = 1.7 Vrms Sr Max. Output voltage swing: RL = 10 kΩ, CL= 100 pF, THD+N = 0.1% Standby time GBw Typ. Line drive standby current (no input signal) VENLD = GND VENLD = 38% VCC tSTBY VN Min. Slew rate b O dB du ms 102 dB 8 µVRMS 1 MHz 0.5 V / µs 0.001 % P e let so Gain bandwidth product ) s ( ct ro 20 Output voltage noise: f = 20 Hz to 20 kHz, A-weighted Vrms µs THD+N BW = 22 kHz, RL = 10 kΩ, VO = 1.5 Vrms, Av = 1, f = 20 Hz to 20 kHz CMRR f = 20 Hz to 20 kHz, Vic = 200 mVpp -70 dB Xtalk Crosstalk channel: f = 20 Hz to 20 kHz, Vo = 1.5 Vrms, RL = 5 kΩ -120 dB CL(1) Capacitive load: RL > 5 kΩ )- s ( t c du o r P 400 1. Higher capacitive loads are possible by adding a serial resistor of 47 Ω in the line driver output. e t e ol s b O 8/31 Doc ID 17913 Rev 1 pF TS4604 Characteristics of the line driver 4 Characteristics of the line driver Figure 2. Current consumption vs. power supply Figure 3. 5.7 Output voltage vs. power supply 2.4 Quiescent supply current Icc (mA) 5.6 5.5 2.3 Output Voltage (Vrms) 5.4 5.3 5.2 5.1 5.0 4.9 4.8 4.7 No Load; No input signal Line Driver Ta=25°C 4.6 4.5 THD+N=1% 2.2 THD+N=0.1% u d o 1.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 r P e Power Supply Voltage Vcc (V) Power Supply Voltage Vcc (V) THD+N vs. output power (G=0 dB) bs 10 u d o 1E-3 1E-4 10 e t e ol Figure 6. RL = 5kΩ to 10kΩ Vcc = 3.3V to 4.8V, G = 20dB Inputs = 0° & 180° BW < 30kHz, Tamb = 25°C 0.1 F=8kHz F=80Hz F=1kHz 1E-3 100 1000 Output Voltage (mVrms) THD+N vs. frequency (G=0 dB) F=80Hz 100 1000 Output Voltage (mVrms) Figure 7. THD+N vs. frequency (G=20 dB) 1 RL = 5kΩ to 10kΩ Vcc = 3.3V to 4.8V G = 0dB, Inputs = 0° & 180° Bw < 20kHz, Tamb = 25°C RL = 5kΩ to 10kΩ Vcc = 3.3V to 4.8V G = 20dB, Inputs = 0° & 180° Bw < 20kHz, Tamb = 25°C Vo=2Vrms 0.01 0.1 Vo=2Vrms 0.01 1E-3 1E-4 THD+N vs. output power (G=20 dB) 0.01 1 0.1 THD + N (%) Pr 1 THD + N (%) THD+N (%) ) s ( ct F=8kHz F=1kHz 0.01 -O THD+N (%) RL = 5kΩ to 10kΩ Vcc = 3.3V to 4.8V, G = 0dB Inputs = 0° & 180° BW < 30kHz, Tamb = 25°C 0.1 s b O t e l o Figure 5. 10 1 RL ≥ 5kΩ, F=1kHz BW