TS34119
Low Power Audio Amplifier
Supply Voltage Range 2 V to 16V Gain Adjustable Range 0dB ~ 46dB Output Power 400mW @Vcc=12V, RL=100Ω
General Description
The TS34119 is a low power audio amplifier, it integrated circuit intended (primarily) for telephone applications, such as in speakerphones. It provides differential speaker outputs to maximize output swing at low supply voltages (2.0V minimum). Coupling capacitors to the speaker are not required. Open loop gain is 80dB, and the closed loop gain is set with two external resistors. A chip Disable pin permits powering down and/or muting the input signal. The TS34119 is offered in SOP-8 and DIP-8 package.
Features
Wide operating supply voltage (2~16V) Chip disable input to power down the IC Low quiescent current for battery powered application Lower power down quiescent current Drives a wide range of speaker load (8~100Ω) Output power exceed 250mW with 32Ωspeaker Low total harmonic distortion Gain adjustable for voice band Requires few external components
Ordering Information
Part No.
TS34119CD TS34119CS TS34119CA -20 ~ +70 oC
Operating Temp.
Package
DIP-8 SOP-8 TSSOP-8
Block Diagram
TS34119
1-11
2004/09 rev. A
Absolute Maximum Rating
Description
Supply Voltage Maximum Input Voltage (FC1, FC2, CD, Vin) Applied Output Voltage to VO1, VO2 when disabled Maximum Output Current at VO1, VO2 Storage Temperature Range
Symbol
Vcc Vin Vvo Io TSTG
Value
+1 ~ 18V - 1.0 ~ Vcc+1.0 - 1.0 ~ Vcc+1.0 ±250 -65 ~ +150
Unit
V V V mA
o
C
Note: Maximum ratings are those values beyond which damage to the device may occur, functional operation should be Restricted to the recommended operating conditions.
Recommended Operating Conditions
Description
Supply Voltage Load Impedance Peak Load Current Differential Gain (5kHz bandwidth) Voltage @ CD (pin 1) Operating Temperature, All Package Types
Symbol
Vcc RL IL AVD VCD TSTG
Value
+2 ~ 16V 8 ~ 100 200 0 ~ 46 0 ~ Vcc -10 ~ +70
Unit
V Ω mA dB
V o
C
Note: This device contains protection circuitry to guard against damage due to high static voltage or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltage to this high impedance circuit. For proper operation, Vin and Vout should be constrained to the range Gnd ≤ (Vin or Vout) ≤ Vcc. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either Gnd or Vcc), unused output must be left open.
Electrical Characteristics (VCD=0V, Ta =25 oC; unless otherwise specified.)
Parameter
Amplifiers (AC Characteristics) AC Input Resistance Open Loop Gain (Amp. #1) Closed Loop Gain (Amp. #2) Gain Bandwidth Product Output Power Pout Ri AVOL1 AV2 GBW Vcc=3V,RL=16Ω,THD≤10% Vcc=6V,RL=32Ω,THD≤10% Vcc=12V,RL=100Ω,THD≤10% Total Harmonic Distortion (f=1KHz) THD Vcc=6V, RL=32Ω, Po=125mW Vcc≥3V, RL=8Ω, Po=20mW Vcc≥12V, RL=32Ω, Po=200mW Power Supply Rejection (Vcc=6.0V, ∆Vcc=3.0V) PSRR C1=∞, C2=0.01uF C1=0.1uF, C2=0, f=1KHz C1=1uF, C2=5uF, f=1KHz Differential Muting GMT Vcc=6V, 1KHz ≤ f ≤ 20KHz, CD=2V @ Vin f30 -0 1.5 ---0.5 0.5 0.6 -12 52 >70 --+0.35 ----1.0 ------dB dB % mW MΩ dB dB MHz Symbol
Test Conditions
Min
Typ
Max
Unit
TS34119
2-11
2004/09 rev. A
Electrical Characteristics (VCD=0V, Ta =25 oC; unless otherwise specified.)
Parameter
Amplifiers (DC Characteristics) Output DC Level @ VO1,VO2 Vo VCC=3V, RL=16 (Rf =75K) Vcc=6V, RL=16 (Rf =75K) Vcc=12V, RL=16 (Rf =75K) Output Level VOH VOL Output DC Offset Voltage (VO1 – VO2) Input Bias Current @ Vin Equivalent Resistance @ FC1 Equivalent Resistance @ FC2 Chip Disable (pin 1) Input Voltage Low Input Voltage High Power Supply Power Supply Current Icc Vcc=3V, RL=∞, CD=0.8V Vcc=16V, RL=∞, CD=0.8V Vcc=3V, RL=∞, CD=2V Note: Currents into a pin are positive, currents out of a pin negative. 2.7 3.3 65 4.0 5.0 100 uA mA VIL VIH -2.0 --0.8 -Vdc ∆Vo Iout=-75mA, 2.0 ≤ Vcc ≤ 16V Iout=75mA, 2.0 ≤ Vcc ≤ 16V Vcc=6V, RL=75KΩ, RL=32Ω Vcc=6.0V Vcc=6.0V --30 -100 18 1.0 --1.15 2.65 5.56 Vcc-1.0 (typ) 0.16 0 -100 150 25 -+30 -200 220 40 mV nA KΩ 1.25 --Vdc Vdc Symbol
Test Conditions
Min
Typ
Max
Unit
fIB
RFC1 RFC2
Typical Temperature Performance ( -10 oC < Ta < +70 oC)
Function
Input Bias Current Total Harmonic Distortion Power Supply Current @ Vin Vcc=6V, RL=32Ω, Po=120mW, f=1kHz Vcc=3V, RL=∞, CD=0V Vcc=3V, RL=∞, CD=2V
Condition
Typical Change
±40 +0.003 -2.5 -0.03
Units
Pa / oC % / oC
o uA / C
TS34119
3-11
2004/09 rev. A
Pin Function Description
Symbol
CD FC2
Pin
1 2
Description
Chip Disable-Digital input. A logic ”0” (