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TS4994IQTSTN/a9000avai1W Differential Input Audio Power amplifier with selectable standby
TS4994ISTSTN/a1160avai1W Differential Input Audio Power amplifier with selectable standby


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TS4994IQT-TS4994IST
1W Differential Input Audio Power amplifier with selectable standby
Differential inputs Near zero pop & click 100dB PSRR @ 217Hz with grounded inputs Operating from VCC = 2.5V to 5.5V 1W RAIL to RAIL output power @ Vcc=5V, THD=1%, F=1kHz, with 8Ω load 90dB CMRR @ 217Hz Ultra-low consumption in standby mode (10nA) Selectable standby mode (active low or
active high
Ultra fast startup time: 15ms typ. Available in flip-chip 300um/9 bumps,
DFN10 3x3, 0.5mm pitch & miniso-8
All lead-free packages
Description

The TS4994 is an audio power amplifier capable
of delivering 1W of continuous RMS output power
into an 8Ω load @ 5V . Thanks to its differential
inputs, it exhibits outstanding noise immunity.
An external standby mode control reduces the
supply current to less than 10nA. A STBY MODE
pin allows the standby pin to be active HIGH or
LOW (except in the MiniSO8 version). An internal
thermal shutdown protection is also provided,
making the device capable of sustaining short-
circuits.
The device is equipped with Common Mode
Feedback circuitry allowing outputs to be always
biased at Vcc/2 regardless of the input common
mode voltage.
The TS4994 has been designed for high quality
audio applications such as mobile phones and
requires few external components.
Applications
Mobile phones (cellular / cordless) Laptop / notebook computers PDAs Portable audio devices
Pin Connections (top view)
1W Differential Input/Output Audio Power Amplifier

with Selectable Standby
TS4994
TS4994
Order Codes
Application Component Information TS4994 Application Component Information
Figure 1: Typical Application Flip-Chip Version
Figure 2: Typical Application DFN10 Version
TS4994 Application Component Information
Figure 3: Typical Application Mini-SO8 Version
Absolute Maximum Ratings TS4994 Absolute Maximum Ratings
Table1: Key parameters and their absolute maximum ratings
All voltages values are measured with respect to the ground pin. The magnitude of input signal must never exceed VCC + 0.3V / GND - 0.3V The device is protected by a thermal shutdown active at 150°C
Table2: Operating conditions
The minimum current consumption (ISTANDBY) is guaranteed when VSTB=GND or VCC (i.e. supply rails) for the whole temperature When mounted on a 4-layer PCB.
TS4994 Electrical Characteristics Electrical Characteristics
Table3: Electrical characteristics - VCC = +5V, GND = 0V, T amb = 25°C (unless otherwise specified)
Dynamic measurements - 20*log(rms(Vout)/rms (Vripple)). Vripple is the super-imposed sinus signal relative to Vcc. Time from standby transition to have fully operational amplifier.
Electrical Characteristics TS4994
Table4: Electrical Characteristics: VCC = +3.3V (all electrical values are guaranteed with correlation
measurements at 2.6V and 5V) GND = 0V, Tamb = 25°C (unless otherwise specified)
Dynamic measurements - 20*log(rms(Vout)/rms (Vripple)). Vripple is the super-imposed sinus signal relative to Vcc. Time from standby transition to have fully operational amplifier.
TS4994 Electrical Characteristics
Table5: Electrical Characteristics - VCC = +2.6V, GND = 0V, T amb = 25°C (unless otherwise specified)
Dynamic measurements - 20*log(rms(Vout)/rms (Vripple)). Vripple is the super-imposed sinus signal relative to Vcc. Time from standby transition to have fully operational amplifier.
Electrical Characteristics TS4994
Figure 4: Current consumption vs. power
supply voltage
Figure 5: Current consumption vs. standby
voltage
Figure 6: Current consumption vs. standby
voltage
Figure 7: Current consumption vs. standby
voltage
Figure 8: Differential DC output voltage vs.
common mode input voltage
Figure 9: Power dissipation vs. output power
TS4994 Electrical Characteristics
Figure 10: Power dissipation vs. output power
Figure 11: Power dissipation vs. output power
Figure 12: Output power vs. power
supply voltage
Figure 13: Output power vs. power supply
voltage
Figure 14: Output power vs. load resistance
Figure 15: Power derating curves
Electrical Characteristics TS4994
Figure 16: Power derating curves
Figure 17: Power derating curves
Figure 18: Open loop gain vs. frequency
Figure 19: Open loop gain vs. frequency
Figure 20: Open Loop gain vs. frequency
Figure 21: Close loop gain vs. frequency
TS4994 Electrical Characteristics
Figure 22: Close loop gain vs. frequency
Figure 23: Close loop gain vs. frequency
Figure 24: PSRR vs. frequency
Figure 25: PSRR vs. frequency
Figure 26: PSRR vs. frequency
Figure 27: PSRR vs. frequency
Electrical Characteristics TS4994
Figure 28: PSRR vs. frequency
Figure 29: PSRR vs. frequency
Figure 30: PSRR vs. frequency
Figure 31: PSRR vs. frequency
Figure 32: PSRR vs. frequency
Figure 33: PSRR vs. common mode input
voltage
TS4994 Electrical Characteristics
Figure 34: PSRR vs. common mode input
voltage
Figure 35: PSRR vs. common mode input
voltage
Figure 36: CMRR vs. frequency
Figure 37: PSRR vs. frequency
Figure 38: CMRR vs. frequency
Figure 39: CMRR vs. frequency
Electrical Characteristics TS4994
Figure 40: CMRR vs. frequency

Figure 41: CMRR vs. frequency
Figure 42: CMRR vs. common mode input
voltage
Figure 43: CMRR vs. common mode input
voltage
Figure 44: THD+N vs. output power
Figure 45: THD+N vs. output power
TS4994 Electrical Characteristics
Figure 46: THD+N vs. output power
Figure 47: THD+N vs. output power
Figure 48: THD+N vs. output power
Figure 49: THD+N vs. output power
Figure 50: THD+N vs. output power
Figure 51: THD+N vs. output power
Electrical Characteristics TS4994
Figure 52: THD+N vs. output power
Figure 53: THD+N vs. output power
Figure 54: THD+N vs. output power
Figure 55: THD+N vs. output power
Figure 56: THD+N vs. output power
Figure 57: THD+N vs. output power
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