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Part: TS482IST
Category:
Analog & Mixed-Signal Processing
-> Amplifiers
-> Audio/Power Amplifiers
Description: 100MW Stereo Headphone Amplifier
Company: ST Microelectronics, Inc.
Datasheet: Download TS482IST datasheet File size : 339 kB
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Datasheet text preview:
TS482
100mW STEREO HEADPHONE AMPLIFIER
s Operating from Vcc=2V to 5.5V s 100mW into 16 at 5V s 38mW into 16 at 3.3V s 11.5mW into 16 at 2V s Sw itch 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 32 stereo headset down to low volta ges . It's delivering up to 100mW per channel (into 16 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) G ND
APPLICATIONS s Stereo Headphone Amplifier s Optical Storage s Computer Motherboard s PD A, 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
AB SOLUTE 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 excess ive heating and the destruction of the device.
OPERATING CONDITIONS
Symbol VCC RL CL VICM RTHJA Supply Voltage Load Resistor Load Capacitor RL = 16 to 100 RL > 100 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 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 IC C 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 = 32 1% Max, F = 1kHz, RL = 32 0.1% Max, F = 1kHz, RL = 16 1% Max, F = 1kHz, RL = 16 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 = 32, Pout = 60mW, 20Hz F 20kHz RL = 16, Pout = 90mW, 20Hz F 20kHz Power Supply Rejection Ratio (Av=1), inputs floating F = 100Hz, Vripple = 100mVpp Max Output Current THD +N < 1%, RL = 16 connected between out and VCC/2 Output Swing VOL : RL = 32 VOH : RL = 32 VOL : RL = 16 VOH : RL = 16 Signal-to-Noise Ratio (Filter Type A, Av=-1) (RL = 32, THD +N < 0.2%, 20Hz F 20kHz) Channel Separation, RL = 32 F = 1kHz F = 20Hz to 20kHz Channel Separation, RL = 16 F = 1kHz F = 20Hz to 20kHz Input Capacitance Gain Bandwidth Product (RL = 32) Slew Rate, Unity Gain Inverting (RL = 16) 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
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