DEMOTS489S

TS488 Datasheet Pop-free 120 mW stereo headphone amplifier Features • • • • • • • • • • • • Pop and click noise protection circuitry Operating range from VCC = 2.2 V to 5.5 V Standby mode active low Output power: – 120 mW at 5 V, into 16 Ω with 0.1% THD+N max. (1 kHz) – 55 mW at 3.3 V, into 16 Ω with 0.1% THD+N max. (1 kHz) Low current consumption: 2.7 mA max. at 5 V Ultra-low standby current consumption: 10 nA typical High signal-to-noise ratio High crosstalk immunity: 102 dB (F = 1 kHz) PSRR: 70 dB typ. (F = 1 kHz), inputs grounded at 5 V Unity-gain stable Short-circuit protection circuitry Available in DFN8 2x2 mm Applications Product status link TS488 Product summary Order code TS488IQT Temperature range -40 to +85 °C Package DFN8 2x2 mm Packing Tape and reel Marking K88 • • • Headphone amplifiers Mobile phones, PDAs, computer motherboards High-end TVs, portable audio players Description The TS488 is a dual audio power amplifier capable of driving, in single-ended mode, either a 16 Ω or a 32 Ω stereo headset. The TS488 eliminates pop and click noise and reduces the number of required external passive components. Capable of descending to low voltages, it delivers up to 31 mW per channel (into 16 Ω loads) of continuous average power with 0.1% THD+N in the audio bandwidth from a 2.5 V power supply. An externally-controlled standby mode reduces the supply current to 10 nA (typ.). The unity gain stable is configured by external gain-setting resistors. DS4579 - Rev 8 - May 2020 For further information contact your local STMicroelectronics sales office. www.st.com TS488 Typical application schematic 1 Typical application schematic Figure 1. Typical application for the TS488 Stdby active low 1 3 2 6 4 TS488=stdby 8 7 5 Table 1. Application component information Component Rin1,2 Cin1,2 Rfeed1,2 Inverting input resistor that sets the closed loop gain in conjunction with Rfeed. This resistor also forms a high pass filter with Cin [Fc = 1 / (2 x Pi x Rin x Cin)] Input coupling capacitor that blocks the DC voltage at the amplifier input terminal Feedback resistor that sets the closed loop gain in conjunction with Rin. AV= closed loop gain= -Rfeed/Rin Cs Supply output capacitor that provides power supply filtering Cb Bypass capacitor that provides half supply filtering Cout1,2 DS4579 - Rev 8 Functional description Output coupling capacitor that blocks the DC voltage at the load input terminal. This capacitor also forms a high pass with RL [Fc = 1 / (2 x Pi x RL x Cout)] page 2/32 TS488 Absolute maximum ratings 2 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol Value Unit 6 V -0.3 V to VCC +0.3 V V -65 to +150 °C Maximum junction temperature 150 °C Rthja Thermal resistance junction-to-ambient 70 °C/W Pdiss Power dissipation(2) 1.79 W 2 kV 200 V VCC Vi Tstg Tj Parameter Supply voltage (1) Input voltage Storage temperature Human body model (pin to pin) ESD Machine mode l220 pF - 240 pF (pin-to-pin) 200 Latch-up V Latch-up immunity (all pins) 200 mA Lead temperature (soldering, 10 s) 250 °C Output short-circuit to VCC or GND continuous (3) 1. All voltage values are measured with respect to the ground pin. 2. Pdiss is calculated with Tamb = 25 °C, Tj = 150 °C. 3. Attention must be paid to continuous power dissipation (VDD x 250 mA). Short-circuits can cause excessive heating and destructive dissipation. Exposing the IC to a short-circuit for an extended period of time dramatically reduceS the product’s life expectancy. Table 3. Operational data Symbol VCC RL Toper CL VSTBY Rthja Parameter Supply voltage Load resistor Operating free air temperature range Value Unit 2.2 to 5.5 V ≥ 16 Ω -40 to + 85 °C Load capacitor: RL = 16 to 100 Ω 400 RL>100 Ω 100 TS488 active TS488 in standby Thermal resistance junction-to-ambient: DFN8(2) pF 1.5 ≤ V ≤ VCC GND ≤ VSTBY ≤ 0.4(1) 40 V °C/W 1. The minimum current consumption (ISTBY) is guaranteed at GND for the whole temperature range. 2. When mounted on a 4-layer PCB. DS4579 - Rev 8 page 3/32 TS488 Electrical characteristics 3 Electrical characteristics Table 4. Electrical characteristics at VCC=+5 V with GND =0 V, Tamb= 25 °C (unless otherwise specified) Symbol ICC ISTBY Pout Parameter Conditions Supply current No input signal, no load 2 2.7 mA Standby current No input signal, VSTBY = GND RL = 32 Ω 10 1000 nA THD+N = 0.1% max., F = 1 kHz, RL = 32 Ω 75 Output power THD+N = 1% max. F = 1 kHz, RL = 32 Ω THD+N Total harmonic distortion + noise PSRR Power supply rejection ratio, inputs grounded(1) Signal-to-noise ratio Crosstalk Channel separation Ci GBP 100 130 AV=-1, RL = 16 Ω, Pout = 90 mW, 20 Hz ≤ F ≤ 20 kHz 0.3 AV=-1, RL ≥ 16 Ω, Cb=1 µF, F = 1 kHz, Vripple = 200 mVpp 64 70 AV=-1, RL ≥ 16 Ω, Cb=1 µF, F = 217 kHz, Vripple = 200 mVpp 62 68 VOH: RL = 32 Ω VOL: RL = 16 Ω % dB 0.23 0.31 4.53 4.72 0.44 0.57 V 4.18 4.48 A-weighted, AV=-1, RL = 32 Ω, THD+N < 0.4%, 20 Hz ≤ F ≤ 20 kHz 105 RL = 32 Ω, AV = -1, F = 1 kHz, F = 20 Hz to 20 kHz -102 RL = 32 Ω, AV = -1, F = 1 kHz, F = 20 Hz to 20 kHz -84 Input capacitance mW 120 0.3 VOH: RL = 16 Ω SNR 80 AV=-1, RL = 32 Ω, Pout = 60 mW, 20 Hz ≤ F ≤ 20 kHz VOL: RL = 32 Ω Output swing 70 THD+N = 0.1% max., F = 1 kHz, RL = 16 Ω THD+N = 1% max., F = 1 kHz, RL = 16 Ω VO Min. Typ. Max. Unit dB dB 1 pF Gain bandwidth product RL = 32 Ω 1.1 MHz SR Slew rate, unity gain inverting RL = 16 Ω 0.65 V/µs VIO Input offset voltage Vicm=VCC/2 1 twu Wake-up time 100 20 mV ms 1. Guaranteed by design and evaluation. DS4579 - Rev 8 page 4/32 TS488 Electrical characteristics Table 5. Electrical characteristics at VCC=+3.3 V with GND =0 V, Tamb= 25 °C (unless otherwise specified) Symbol ICC ISTBY Pout Parameter Conditions Supply current Standby current No input signal, no load 1.8 2.5 mA No input signal, VSTBY = GND RL = 32 Ω 10 1000 nA THD+N = 0.1% max., F = 1 kHz, RL = 32 Ω 34 THD+N = 1% max. F = 1 kHz, RL = 32 Ω Output power Total harmonic distortion + noise PSRR Power supply rejection ratio, inputs grounded(1) VO GBP 57 AV=-1, RL = 16 Ω, Pout = 35 mW, 20 Hz ≤ F ≤ 20 kHz 0.3 63 69 AV=-1, RL ≥ 16 Ω, Cb=1 µF, F = 217 kHz, Vripple = 200 mVpp 61 67 VOL: RL = 32 Ω 0.15 VOH: RL = 32 Ω 3.03 3.12 % dB 0.2 0.28 0.36 V 2.82 2.97 A-weighted, AV=-1, RL = 32 Ω, THD+N < 0.4%, 20 Hz ≤ F ≤ 20 kHz 102 dB RL = 32 Ω, AV = -1, F = 1 kHz, F = 20 Hz to 20 kHz -102 dB RL = 32 Ω, AV = -1, F = 1 kHz, F = 20 Hz to 20 kHz -84 dB 1 pF Crosstalk Channel separation Ci 47 0.3 VOL: RL = 16 Ω mW 55 AV=-1, RL ≥ 16 Ω, Cb=1 µF, F = 1 kHz, Vripple = 200 mVpp Output swing Signal-to-noise ratio 35 AV=-1, RL = 32 Ω, Pout = 16 mW, 20 Hz ≤ F ≤ 20 kHz VOH: RL = 16 Ω SNR 30 THD+N = 0.1% max., F = 1 kHz, RL = 16 Ω THD+N = 1% max, F = 1 kHz, RL = 16 Ω THD+N Min. Typ. Max. Unit Input capacitance Gain bandwidth product RL = 32 Ω 1.1 MHz SR Slew rate, unity gain inverting RL = 16 Ω 0.6 V/µs VIO Input offset voltage Vicm=VCC/2 1 twu Wake-up time 100 20 mV ms 1. Guaranteed by design and evaluation. Note: DS4579 - Rev 8 All electrical values are guaranteed with correlation measurements at 2.5 V and 5 V. page 5/32 TS488 Electrical characteristics Table 6. Electrical characteristics at VCC=+2.5 V with GND =0 V, Tamb= 25 °C (unless otherwise specified) Symbol ICC ISTBY Pout Parameter Conditions Supply current Standby current No input signal, no load 1.8 2.5 mA No input signal, VSTBY = GND RL = 32 Ω 10 1000 nA THD+N = 0.1% max., F = 1 kHz, RL = 32 Ω 19 THD+N = 1% max. F = 1 kHz, RL = 32 Ω Output power Total harmonic distortion + noise PSRR Power supply rejection ratio, inputs grounded(1) AV=-1, RL ≥ 16 Ω, Cb=1 µF, F = 1 kHz, Vripple = 200 mVpp 68 VOH: RL = 32 Ω VOL: RL = 16 Ω GBP 61 % dB 66 0.12 0.16 2.03 2.36 0.22 0.28 V 2.15 2.25 A-weighted, AV=-1, RL = 32 Ω, THD+N < 0.4%, 20 Hz ≤ F ≤ 20 kHz 100 dB RL = 32 Ω, AV = -1, F = 1 kHz, F = 20 Hz to 20 kHz -102 dB RL = 32 Ω, AV = -1, F = 1 kHz, F = 20 Hz to 20 kHz -84 dB 1 pF Crosstalk Channel separation Ci 32 0.3 Output swing Signal-to-noise ratio 27 AV=-1, RL = 16 Ω, Pout = 16 mW, 20 Hz ≤ F ≤ 20 kHz AV=-1, RL ≥ 16 Ω, Cb=1 µF, F = 217 kHz, Vripple = 200 mVpp mW 31 0.3 VOH: RL = 16 Ω SNR 20 AV=-1, RL = 32 Ω, Pout = 10 mW, 20 Hz ≤ F ≤ 20 kHz VOL: RL = 32 Ω VO 18 THD+N = 0.1% max., F = 1 kHz, RL = 16 Ω THD+N = 1% max, F = 1 kHz, RL = 16 Ω THD+N Min. Typ. Max. Unit Input capacitance Gain bandwidth product RL = 32 Ω 1.1 MHz SR Slew rate, unity gain inverting RL = 16 Ω 0.6 V/µs VIO Input offset voltage Vicm=VCC/2 1 twu Wake-up time 100 20 mV ms 1. Guaranteed by design and evaluation. DS4579 - Rev 8 page 6/32 TS488 Electrical characteristics curves Electrical characteristics curves 225 Vcc=2.5V RL=16Ω 180 gain TAMB=25°C 135 Gain (dB) 75 50 90 25 45 0 0 phase 125 225 Vcc=5V RL=16Ω 180 gain TAMB=25°C 135 100 75 Phase (°) 100 50 90 25 45 0 0 phase -25 -45 -25 -45 -50 -90 -50 -90 -75 0 10 102 104 106 -135 108 -75 0 10 102 Frequency (Hz) 90 25 45 0 phase -25 -45 -50 -90 102 104 Frequency (Hz) DS4579 - Rev 8 106 -135 108 75 Gain (dB) 50 225 Vcc=5V RL=16Ω 180 CL=400pF TAMB=25°C 135 gain 100 Phase (°) Gain (dB) 75 -75 0 10 -135 108 Figure 5. Open-loop frequency response VCC=5 V RL=16 Ω, CL=400 pF 125 225 Vcc=2.5V RL=16Ω 180 CL=400pF TAMB=25°C 135 gain 100 0 106 Frequency (Hz) Figure 4. Open-loop frequency response VCC=2.5 V RL=16 Ω, CL=400 pF 125 104 50 90 25 45 0 Phase (°) 125 Figure 3. Open-loop frequency response VCC = 5 V RL=16 Ω Phase (°) Figure 2. Open-loop frequency response VCC = 2.5 V RL=16 Ω Gain (dB) 4 0 phase -25 -45 -50 -90 -75 0 10 102 104 106 -135 108 Frequency (Hz) page 7/32 TS488 Electrical characteristics curves 225 Vcc=2.5V RL=32Ω 180 gain TAMB=25°C 135 50 90 25 0 45 0 phase 75 Phase (°) 50 90 25 45 0 0 phase -25 -45 -25 -45 -50 -90 -50 -90 -75 0 10 102 104 106 -75 0 10 -135 108 102 Gain (dB) 75 50 90 25 45 0 125 0 phase 75 50 90 25 45 0 0 phase -25 -45 -25 -45 -50 -90 -50 -90 -75 0 10 102 104 106 -75 0 10 -135 108 102 Figure 10. Open-loop frequency response VCC=2.5 V RL=600 Ω 125 -135 108 90 25 45 0 0 phase 225 Vcc=5V RL=600Ω 180 gain TAMB=25°C 135 100 75 Gain (dB) 50 125 Phase (°) 75 106 Figure 11. Open-loop frequency response VCC=5 V RL=600 Ω 225 Vcc=2.5V RL=600Ω 180 gain TAMB=25°C 135 100 104 Frequency (Hz) Frequency (Hz) Gain (dB) 225 Vcc=5V RL=32Ω 180 CL=400pF TAMB=25°C 135 gain 100 Gain (dB) 100 -135 108 Figure 9. Open-loop frequency response VCC = 5 V RL=32 Ω, CL=400 pF 225 Vcc=2.5V RL=32Ω 180 CL=400pF TAMB=25°C 135 gain Phase (°) 125 106 Frequency (Hz) Frequency (Hz) Figure 8. Open-loop frequency response VCC=2.5 V RL=32 Ω, CL=400 pF 104 50 90 25 45 0 0 phase -25 -45 -25 -45 -50 -90 -50 -90 -75 0 10 102 104 Frequency (Hz) DS4579 - Rev 8 106 -135 108 -75 0 10 Phase (°) Gain (dB) 75 225 Vcc=5V RL=32Ω 180 gain TAMB=25°C 135 100 Gain (dB) 100 125 Phase (°) 125 Figure 7. Open-loop frequency response VCC = 5 V RL=32 Ω Phase (°) Figure 6. Open-loop frequency response VCC = 2.5 V RL=32 Ω 102 104 106 -135 108 Frequency (Hz) page 8/32 TS488 Electrical characteristics curves Figure 13. Signal-to-noise ratio vs. power supply voltage A weighted AV=-1 110 DFN8 3 Signal to Noise Ratio (dB) Package Power Dissipation (W) Figure 12. Power derating curves 4-layer PCB 2 No heatsink 1 104 102 RL=16Ω 100 0 0 25 50 75 100 125 Ambiant Temperature(°C) 98 2 150 Signal to Noise Ratio (dB) 100 RL=16Ω 98 RL=32Ω 96 5 6 A-weighted Filter 104 Av=-2, TAMB=25°C Cb=1μF THD+N