TS482IDT

TS482 100mW STEREO HEADPHONE AMPLIFIER s Operating from Vcc=2V to 5.5V s 100mW into 16Ω at 5V s 38mW into 16Ω at 3.3V s 11.5mW into 16Ω at 2V s Switch ON/OFF click reduction circuitry s High Power Supply Rejection Ratio: 85dB at 5V PIN CONNECTIONS (top view) TS482ID, TS482IDT - SO8 OUT (1) VIN- (1) VIN+ (1) GND 1 2 3 4 8 7 6 5 VCC OUT (2) VIN- (2) VIN+ (2) s High Signal-to-Noise ratio: 110dB(A) at 5V s High Crosstalk immunity: 100dB (F=1kHz) s Rail to Rail input and output s Unity-Gain Stable s Available in SO8, MiniSO8 & DFN8 DESCRIPTION The TS482 is a dual audio power amplifier able to drive a 16 or 32Ω stereo headset down to low voltages. It’s delivering up to 100mW per channel (into 16Ω loads) of continuous average power with 0.1% THD+N from a 5V power supply. TS482IST - MiniSO8 OUT (1) VIN- (1) VIN+ (1) GND 1 2 3 4 8 7 6 5 VCC OUT (2) VIN- (2) VIN+ (2) TS482IQT - DFN8 OUT (1) 1 2 3 4 8 7 6 5 Vcc OUT (2) VIN - (2) VIN + (2) The unity gain stable TS482 can be configured by external gain-setting resistors. VIN - (1) VIN + (1) GND APPLICATIONS s Stereo Headphone Amplifier s Optical Storage s Computer Motherboard s PDA, organizers & Notebook computers s High end TV, Set Top Box, DVD Players s Sound Cards ORDER CODE Part Number TS482ID/DT TS482IST TS482IQT Temperature Range Package Marking D • -40, +85°C • • 482I S Q TYPICAL APPLICATION SCHEMATIC Rfeed1 1µF Right In Cin1 + 2.2µF 2.2µF + Left In Cin2 Rfeed2 MiniSO & DFN only available in Tape & Reel with T suffix, SO is available in Tube (D) and in Tape & Reel (DT)) June 2003 + + 3.9k RpolVcc Cs 100k 8 3.9k 2 1 Rin1 3 + Cb TS482 + 5 + 7 Rin2 1µF 6 3.9k 4 100k Rpol 3.9k + Vcc 220µF + Cout1 Cout2 RL=32Ohms + RL=32Ohms 220µF 1/24 TS482 ABSOLUTE MAXIMUM RATINGS Symbol VCC Vi Toper Tstg Tj Rthja Supply voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Maximum Junction Temperature Thermal Resistance Junction to Ambient SO8 MiniSO8 DFN8 1) Parameter Value 6 -0.3 to VCC +0.3 -40 to + 85 -65 to +150 150 175 215 70 0.71 0.58 1.79 2 200 200 250 see note 3) Unit V V °C °C °C °C/W Power Dissipation 2) SO8 Pd MiniSO8 DFN8 ESD Human Body Model (pin to pin) ESD Machine Model - 220pF - 240pF (pin to pin) Latch-up Latch-up Immunity (All pins) Lead Temperature (soldering, 10sec) Output Short-Circuit Duration W kV V mA °C 1. All voltages values are measured with respect to the ground pin. 2. Pd has been calculated with Tamb = 25°C, Tjunction = 150°C. 3. Attention must be paid to continuous power dissipation. Exposure of the IC to a short circuit on one or two amplifiers simultaneously can cause excessive heating and the destruction of the device. OPERATING CONDITIONS Symbol VCC RL CL VICM RTHJA Supply Voltage Load Resistor Load Capacitor RL = 16 to 100Ω RL > 100Ω Common Mode Input Voltage Range Thermal Resistance Junction to Ambient SO8 MiniSO8 DFN81) Parameter Value 2 to 5.5 >= 16 400 100 GND to VCC 150 190 41 Unit V Ω pF V °C/W 1. When mounted on a 4-layer PCB. Components Rin Cin Rfeed Cs Cb Cout Rpol Av 2/24 Functional Description Inverting input resistor which 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 which blocks the DC voltage at the amplifier input terminal Feed back resistor which sets the closed loop gain in conjunction with Rin Supply Bypass capacitor which provides power supply filtering Bypass capacitor which provides half supply filtering Output coupling capacitor which blocks the DC voltage at the load input terminal This capacitor also forms a high pass filter with RL (fc = 1 / (2 x Pi x RL x Cout)) These 2 resistors form a voltage divider which provide a DC biasing voltage (Vcc/2) for the 2 amplifiers. Closed loop gain = -Rfeed / Rin TS482 ELECTRICAL CHARACTERISTICS VCC = +5V, GND = 0V, Tamb = 25°C (unless otherwise specified) Symbol ICC VIO IIB Parameter Supply Current No input signal, no load Input Offset Voltage (VICM = VCC/2) Input Bias Current (VICM = VCC/2) Output Power THD+N THD+N THD+N THD+N = = = = 0.1% Max, F = 1kHz, RL = 32Ω 1% Max, F = 1kHz, RL = 32Ω 0.1% Max, F = 1kHz, RL = 16Ω 1% Max, F = 1kHz, RL = 16Ω Min. Typ. 5.5 1 200 Max. 7.2 5 500 Unit mA mV nA PO 60 95 65 67.5 100 107 mW THD + N Total Harmonic Distortion + Noise (Av=-1) 1) RL = 32Ω, Pout = 60mW, 20Hz ≤ F ≤ 20kHz RL = 16Ω, Pout = 90mW, 20Hz ≤ F ≤ 20kHz Power Supply Rejection Ratio (Av=1), inputs floating F = 100Hz, Vripple = 100mVpp Max Output Current THD +N < 1%, RL = 16Ω connected between out and VCC/2 Output Swing VOL : RL = 32Ω VOH : RL = 32Ω VOL : RL = 16Ω VOH : RL = 16Ω Signal-to-Noise Ratio (Filter Type A, Av=-1) (RL = 32Ω, THD +N < 0.2%, 20Hz ≤ F ≤ 20kHz) Channel Separation, RL = 32Ω F = 1kHz F = 20Hz to 20kHz Channel Separation, RL = 16Ω F = 1kHz F = 20Hz to 20kHz Input Capacitance Gain Bandwidth Product (RL = 32Ω) Slew Rate, Unity Gain Inverting (RL = 16Ω) 1.35 0.45 106 0.03 0.03 85 120 % PSRR IO dB mA VO 4.45 4.2 95 0.4 4.6 0.55 4.4 110 0.48 V 0.65 SNR dB Crosstalk 100 80 100 80 1 2.2 0.7 dB CI GBP SR pF MHz V/µs 1. Fig. 68 to 79 show dispersion of these parameters. 3/24 TS482 ELECTRICAL CHARACTERISTICS VCC = +3.3V, GND = 0V, Tamb = 25°C (unless otherwise specified) 2) Symbol ICC VIO IIB Parameter Supply Current No input signal, no load Input Offset Voltage (VICM = VCC/2) Input Bias Current (VICM = VCC/2) Output Power THD+N THD+N THD+N THD+N = = = = 0.1% Max, F = 1kHz, RL = 32Ω 1% Max, F = 1kHz, RL = 32Ω 0.1% Max, F = 1kHz, RL = 16Ω 1% Max, F = 1kHz, RL = 16Ω Min. Typ. 5.3 1 200 Max. 7.2 5 500 Unit mA mV nA PO 23 36 27 28 38 42 mW THD + N Total Harmonic Distortion + Noise (Av=-1) 1) RL = 32Ω, Pout = 16mW, 20Hz ≤ F ≤ 20kHz RL = 16Ω, Pout = 35mW, 20Hz ≤ F ≤ 20kHz Power Supply Rejection Ratio (Av=1), inputs floating F = 100Hz, Vripple = 100mVpp Max Output Current THD +N < 1%, RL = 16Ω connected between out and VCC/2 Output Swing VOL : RL = 32Ω VOH : RL = 32Ω VOL : RL = 16Ω VOH : RL = 16Ω Signal-to-Noise Ratio (Filter Type A, Av=-1) (RL = 32Ω, THD +N < 0.2%, 20Hz ≤ F ≤ 20kHz) Channel Separation, RL = 32Ω F = 1kHz F = 20Hz to 20kHz Channel Separation, RL = 16Ω F = 1kHz F = 20Hz to 20kHz Input Capacitance Gain Bandwith Product (RL = 32Ω) Slew Rate, Unity Gain Inverting (RL = 16Ω) 1.2 0.45 64 0.03 0.03 80 75 % PSRR IO dB mA VO 2.85 2.68 92 0.3 3 0.45 2.85 107 0.38 V 0.52 SNR dB Crosstalk 100 80 100 80 1 2 0.7 dB CI GBP SR pF MHz V/µs 1. Fig. 68 to 79 show dispersion of these parameters. 2. All electrical values are guaranted with correlation measurements at 2V and 5V 4/24 TS482 ELECTRICAL CHARACTERISTICS VCC = +2.5V, GND = 0V, Tamb = 25°C (unless otherwise specified) 2) Symbol ICC VIO IIB Parameter Supply Current No input signal, no load Input Offset Voltage (VICM = VCC/2) Input Bias Current (VICM = VCC/2) Output Power THD+N THD+N THD+N THD+N = = = = 0.1% Max, F = 1kHz, RL = 32Ω 1% Max, F = 1kHz, RL = 32Ω 0.1% Max, F = 1kHz, RL = 16Ω 1% Max, F = 1kHz, RL = 16Ω Min. Typ. 5.1 1 200 Max. 7.2 5 500 Unit mA mV nA PO 12.5 17.5 13.5 14.5 20.5 22 mW THD + N Total Harmonic Distortion + Noise (Av=-1) 1) RL = 32Ω, Pout = 10mW, 20Hz ≤ F ≤ 20kHz RL = 16Ω, Pout = 16mW, 20Hz ≤ F ≤ 20kHz Power Supply Rejection Ratio (Av=1), inputs floating F = 100Hz, Vripple = 100mVpp Max Output Current THD +N < 1%, RL = 16Ω connected between out and VCC/2 Output Swing VOL : RL = 32Ω VOH : RL = 32Ω VOL : RL = 16Ω VOH : RL = 16Ω Signal-to-Noise Ratio (Filter Type A, Av=-1) (RL = 32Ω, THD +N < 0.2%, 20Hz ≤ F ≤ 20kHz) Channel Separation, RL = 32Ω F = 1kHz F = 20Hz to 20kHz Channel Separation, RL = 16Ω F = 1kHz F = 20Hz to 20kHz Input Capacitance Gain Bandwidth Product (RL = 32Ω) Slew Rate, Unity Gain Inverting (RL = 16Ω) 1.2 0.45 45 0.03 0.03 75 56 % PSRR IO dB mA VO 2.14 1.97 89 0.25 2.25 0.35 2.15 102 0.325 V 0.45 SNR dB Crosstalk 100 80 100 80 1 2 0.7 dB CI GBP SR pF MHz V/µs 1. Fig. 68 to 79 show dispersion of these parameters. 2. All electrical values are guaranted with correlation measurements at 2V and 5V 5/24 TS482 ELECTRICAL CHARACTERISTICS VCC = +2V, GND = 0V, Tamb = 25°C (unless otherwise specified) Symbol ICC VIO IIB Parameter Supply Current No input signal, no load Input Offset Voltage (VICM = VCC/2) Input Bias Current (VICM = VCC/2) Output Power THD+N THD+N THD+N THD+N = = = = 0.1% Max, F = 1kHz, RL = 32Ω 1% Max, F = 1kHz, RL = 32Ω 0.1% Max, F = 1kHz, RL = 16Ω 1% Max, F = 1kHz, RL = 16Ω Min. Typ. 5 1 200 Max. 7.2 5 500 Unit mA mV nA PO 7 9.5 8 9 11.5 13 mW THD + N Total Harmonic Distortion + Noise (Av=-1) 1) RL = 32Ω, Pout = 6.5mW, 20Hz ≤ F ≤ 20kHz RL = 16Ω, Pout = 8mW, 20Hz ≤ F ≤ 20kHz Power Supply Rejection Ratio (Av=1), inputs floating F = 100Hz, Vripple = 100mVpp Max Output Current THD +N < 1%, RL = 16Ω connected between out and VCC/2 Output Swing VOL : RL = 32Ω VOH : RL = 32Ω VOL : RL = 16Ω VOH : RL = 16Ω Signal-to-Noise Ratio (Filter Type A, Av=-1) (RL = 32Ω, THD +N < 0.2%, 20Hz ≤ F ≤ 20kHz) Channel Separation, RL = 32Ω F = 1kHz F = 20Hz to 20kHz Channel Separation, RL = 16Ω F = 1kHz F = 20Hz to 20kHz Input Capacitance Gain Bandwith Product (RL = 32Ω) Slew Rate, Unity Gain Inverting (RL = 16Ω) 1.2 0.42 33 0.02 0.025 75 41.5 % PSRR IO dB mA VO 1.67 1.53 88 0.24 1.73 0.33 1.63 101 0.295 V 0.41 SNR dB Crosstalk 100 80 100 80 1 2 0.65 dB CI GBP SR pF MHz V/µs 1. Fig. 68 to 79 show dispersion of these parameters. 6/24 TS482 Index of Graphs Description Open Loop Gain Phase and Gain Margin vs Power Supply Voltage Output Power vs Power Supply Voltage Output Power vs Load Resistance Power Dissipation vs Output Power Power Derating Curves Current Consumption vs Power Supply Voltage PSRR vs Frequency THD + N vs Output Power THD + N vs Frequency Signal to Noise Ratio vs Power Supply Voltage Equivalent Input Noise voltage vs Frequency Output Voltage Swing vs Supply Voltage Crosstalk vs Frequency Lower Cut Off Frequency Curves Statistical Results on THD+N Figure 1 to 10 11 to 20 21 to 23 23 to 27 28 to 31 32 33 34 35 to 49 50 to 54 55 to 58 59 60 61 to 65 66, 67 68 to 79 Page 8, 9 9 to 11 11 11, 12 12, 13 13 13 13 13 to 16 16 17 17 17 18 18, 19 19 to 21 7/24 TS482 Fig. 1 : Open Loop Gain and Phase vs Frequency Fig. 2 : Open Loop Gain and Phase vs Frequency 80 Gain 60 40 Gain (dB) 180 Vcc = 5V RL = 8Ω Tamb = 25°C 160 140 120 Phase (Deg) 80 Gain 60 40 Gain (dB) 180 Vcc = 2V RL = 8Ω Tamb = 25°C 160 140 120 100 Phase (Deg) Phase (Deg) Phase (Deg) 100 20 0 -20 -40 0.1 Phase 80 60 40 20 0 1 10 100 Frequency (kHz) 1000 10000 -20 20 0 -20 -40 0.1 Phase 80 60 40 20 0 1 10 100 Frequency (kHz) 1000 10000 -20 Fig. 3 : Open Loop Gain and Phase vs Frequency Fig. 4 : Open Loop Gain and Phase vs Frequency 180 80 60 Gain (dB) 180 80 60 Phase (Deg) Gain (dB) Gain Vcc = 5V RL = 16Ω Tamb = 25°C 160 140 120 Gain Vcc = 2V RL = 16Ω Tamb = 25°C 160 140 120 40 20 0 -20 -40 0.1 Phase 100 80 60 40 20 0 1 10 100 Frequency (kHz) 1000 10000 -20 40 20 0 -20 -40 0.1 Phase 100 80 60 40 20 0 1 10 100 Frequency (kHz) 1000 10000 -20 Fig. 5 : Open Loop Gain and Phase vs Frequency Fig. 6 : Open Loop Gain and Phase vs Frequency 180 80 60 Gain (dB) 180 80 60 Phase (Deg) Gain (dB) Gain Vcc = 5V RL = 32Ω Tamb = 25°C 160 140 120 Gain Vcc = 2V RL = 32Ω Tamb = 25°C 160 140 120 40 20 0 -20 -40 0.1 Phase 100 80 60 40 20 0 1 10 100 Frequency (kHz) 1000 10000 -20 40 20 0 -20 -40 0.1 Phase 100 80 60 40 20 0 1 10 100 Frequency (kHz) 1000 10000 -20 8/24 TS482 Fig. 7 : Open Loop Gain and Phase vs Frequency Fig. 8 : Open Loop Gain and Phase vs Frequency 180 80 60 Gain (dB) 180 80 60 Phase (Deg) Gain (dB) Gain Vcc = 5V RL = 600Ω Tamb = 25°C 160 140 120 Gain Vcc = 2V RL = 600Ω Tamb = 25°C 160 140 120 100 Phase (Deg) Phase (Deg) 40 20 0 -20 -40 0.1 Phase 100 80 60 40 20 0 1 10 100 1000 Frequency (kHz) 10000 -20 40 20 0 -20 -40 0.1 Phase 80 60 40 20 0 1 10 100 Frequency (kHz) 1000 10000 -20 Fig. 9 : Open Loop Gain and Phase vs Frequency Fig. 10 : Open Loop Gain and Phase vs Frequency 180 80 60 Gain (dB) 180 80 60 Gain Vcc = 2V RL = 5kΩ Tamb = 25°C 160 140 120 Gain Vcc = 5V RL = 5kΩ Tamb = 25°C 160 140 120 Phase (Deg) 100 Phase 80 60 Gain (dB) 40 20 0 -20 -40 0.1 40 20 0 -20 Phase 100 80 60 40 20 0 40 20 0 1 10 100 1000 Frequency (kHz) 10000 -20 -40 0.1 1 10 100 Frequency (kHz) 1000 10000 -20 Fig. 11 : Phase Margin vs Power Supply Voltage Fig. 12 : Gain Margin vs Power Supply Voltage 50 RL=8Ω Tamb=25°C 40 Phase Margin (Deg) 50 RL=8Ω Tamb=25°C 40 30 Gain Margin (dB) 30 20 CL= 0 to 500pF 20 CL=0 to 500pF 10 10 0 2.0 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 0 2.0 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 9/24 TS482 Fig. 13 : Phase Margin vs Power Supply Voltage Fig. 14 : Gain Margin vs Power Supply Voltage 50 50 RL=16Ω Tamb=25°C 40 Phase Margin (Deg) 40 30 Gain Margin (dB) CL= 0 to 500pF 30 20 20 CL=0 to 500pF 10 RL=16Ω Tamb=25°C 0 2.0 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 10 0 2.0 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 Fig. 15 : Phase Margin vs Power Supply Voltage Fig. 16 : Gain Margin vs Power Supply Voltage 50 50 RL=32Ω Tamb=25°C 40 Phase Margin (Deg) 40 CL= 0 to 500pF Gain Margin (dB) 30 30 20 20 CL=0 to 500pF 10 10 RL=32Ω Tamb=25°C 0 2.0 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 0 2.0 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 Fig. 17 : Phase Margin vs Power Supply Voltage Fig. 18 : Gain Margin vs Power Supply Voltage 70 60 Phase Margin (Deg) 20 CL=0pF CL=100pF CL=200pF CL=0pF 40 30 20 10 RL=600Ω Tamb=25°C 2.5 CL=500pF Gain Margin (dB) 50 10 CL=500pF RL=600Ω Tamb=25°C 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 0 2.0 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 0 2.0 10/24 TS482 Fig. 19 : Phase Margin vs Power Supply Voltage Fig. 20 : Gain Margin vs Power Supply Voltage 70 60 Phase Margin (Deg) 20 CL=0pF Gain Margin (dB) 50 40 30 20 10 0 2.0 RL=5kΩ Tamb=25°C 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 CL=0pF CL=300pF CL=500pF CL=100pF 10 CL=200pF CL=500pF RL=5kΩ Tamb=25°C 0 2.0 2.5 3.0 3.5 4.0 Power Supply Voltage (V) 4.5 5.0 Fig. 21 : Output Power vs Power Supply Voltage Fig. 22 : Output Power vs Power Supply Voltage 250 225 200 Output power (mW) 175 150 125 100 75 50 25 0 2.0 2.5 3.0 3.5 4.0 Vcc (V) 4.5 5.0 5.5 THD+N=0.1% Av = -1 RL = 8Ω F = 1kHz BW < 125kHz Tamb = 25°C THD+N=10% 200 175 THD+N=1% 150 Output power (mW) 125 100 75 50 Av = -1 RL = 16Ω F = 1kHz BW < 125kHz Tamb = 25°C THD+N=10% THD+N=1% THD+N=0.1% 25 0 2.0 2.5 3.0 3.5 4.0 Vcc (V) 4.5 5.0 5.5 Fig. 23 :Output Power vs Power Supply Voltage Fig. 24 : Output Power vs Load Resistance 200 100 Av = -1 RL = 32Ω F = 1kHz BW < 125kHz Tamb = 25°C THD+N=10% 180 THD+N=1% 160 Output power (mW) THD+N=1% Output power (mW) 140 120 100 80 60 40 20 THD+N=0.1% 75 Av = -1 Vcc = 5V F = 1kHz BW < 125kHz Tamb = 25°C THD+N=10% 50 25 THD+N=0.1% 0 2.0 2.5 3.0 3.5 4.0 Vcc (V) 4.5 5.0 5.5 0 8 16 24 32 40 48 Load Resistance ( ) 56 64 11/24 TS482 Fig. 25 : Output Power vs Load Resistance Fig. 26 : Output Power vs Load Resistance 50 70 60 Output power (mW) THD+N=1% Output power (mW) 50 40 Av = -1 Vcc = 3.3V F = 1kHz BW < 125kHz Tamb = 25°C 45 40 35 30 25 20 15 10 5 THD+N=0.1% 8 16 24 32 40 48 Load Resistance (ohm) THD+N=1% Av = -1 Vcc = 2.6V F = 1kHz BW < 125kHz Tamb = 25°C THD+N=10% 30 20 10 0 THD+N=0.1% THD+N=10% 8 16 24 32 40 48 Load Resistance (ohm) 56 64 0 56 64 Fig. 27 : Output Power vs Load Resistance Fig. 28 : Power Dissipation vs Output Power 25 Av = -1 Vcc = 2V F = 1kHz BW < 125kHz Tamb = 25°C 20 Output power (mW) Power Dissipation (mW) 160 Vcc=5V F=1kHz 140 THD+N