TSC TS34119 Technical data

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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 (8~100)

 Output power exceed 250mW with 32speaker

 Low total harmonic distortion

 Gain adjustable for voice band

Ordering Information

Part No. Operating Temp. Package

TS34119CD DIP-8

TS34119CS SOP-8

TS34119CA

-20 ~ +70

o

C

TSSOP-8

 Requires few external components

Block Diagram

TS34119 1-11 2004/09 rev. A

Absolute Maximum Rating

Description Symbol Value Unit

Supply Voltage Vcc +1 ~ 18V V

Maximum Input Voltage (FC1, FC2, CD, Vin) Vin - 1.0 ~ Vcc+1.0 V

Applied Output Voltage to VO1, VO2 when disabled Vvo - 1.0 ~ Vcc+1.0 V

Maximum Output Current at VO1, VO2 Io ±250 mA

Storage Temperature Range T

-65 ~ +150

STG

Note: Maximum ratings are those values beyond which damage to the device may occur, functional operation should be
Restricted to the recommended operating conditions.

o

C

Recommended Operating Conditions

Description Symbol Value Unit

Supply Voltage Vcc +2 ~ 16V V

Load Impedance RL 8 ~ 100 

Peak Load Current IL 200 mA

Differential Gain (5kHz bandwidth) AVD 0 ~ 46 dB

Voltage @ CD (pin 1) VCD 0 ~ Vcc

Operating Temperature, All Package Types T

-10 ~ +70

STG

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

o

C; unless otherwise specified.)

V

o

C

Parameter

Symbol

Test Conditions Min Typ Max Unit

Amplifiers (AC Characteristics)

AC Input Resistance Ri @ Vin -- >30 -- M

Open Loop Gain (Amp. #1) AVOL1 f<100Hz 80 -- -- dB

Closed Loop Gain (Amp. #2) AV2 Vcc=6V,f=1KHz, RL=32 -0.35 0 +0.35 dB

Gain Bandwidth Product GBW -- 1.5 -- MHz

Output Power

Pout

Total Harmonic Distortion

(f=1KHz)

THD

Power Supply Rejection

(Vcc=6.0V, ∆Vcc=3.0V)

PSRR

Vcc=3V,RL=16,THD≤10% 55 -- --

Vcc=6V,RL=32,THD≤10% 250 -- --

Vcc=12V,R

Vcc=6V, RL=32, Po=125mW -- 0.5 1.0

=100,THD≤10% 400 -- --

L

Vcc≥3V, RL=8, Po=20mW -- 0.5 --

Vcc≥12V, R

C1=∞, C2=0.01uF 50 -- --

=32, Po=200mW -- 0.6 --

L

C1=0.1uF, C2=0, f=1KHz -- 12 --

mW

%

dB

C1=1uF, C2=5uF, f=1KHz -- 52 --

Differential Muting GMT Vcc=6V, 1KHz ≤ f ≤ 20KHz,

-- >70 -- dB

CD=2V

TS34119 2-11 2004/09 rev. A

Electrical Characteristics (VCD=0V, Ta =25

o

C; unless otherwise specified.)

Parameter

Amplifiers (DC Characteristics)

Output DC Level @ VO1,VO2

Output DC Offset Voltage

(VO1 – VO2)
Input Bias Current @ Vin f

Equivalent Resistance @ FC1 R

Equivalent Resistance @ FC2 R

Chip Disable (pin 1)

Input Voltage Low VIL -- -- 0.8

Input Voltage High VIH 2.0 -- --

Power Supply

Power Supply Current

Note: Currents into a pin are positive, currents out of a pin negative.

Symbol

Vo

VOH Iout=-75mA, 2.0 ≤ Vcc ≤ 16V Vcc-1.0 (typ) Output Level

V

Iout=75mA, 2.0 ≤ Vcc ≤ 16V -- 0.16 --

OL

∆Vo Vcc=6V, RL=75K, RL=32 -30 0 +30 mV

Vcc=6.0V -- -100 -200 nA

IB

100 150 220

FC1

FC2

Icc

Typical Temperature Performance ( -10

Test Conditions Min Typ Max Unit

VCC=3V, RL=16 (Rf =75K) 1.0 1.15 1.25

Vcc=6V, RL=16 (Rf =75K) -- 2.65 --

Vcc=12V, RL=16 (R

Vcc=6.0V

Vcc=3V, RL=∞, CD=0.8V 2.7 4.0

Vcc=16V, RL=∞, CD=0.8V 3.3 5.0

Vcc=3V, R

=∞, CD=2V 65 100 uA

L

o

C < Ta < +70 oC)

=75K) -- 5.56 --

f

18 25 40

Vdc

Vdc

K

Vdc

mA

Function Condition Typical Change Units

Input Bias Current @ Vin ±40 Pa / oC

Total Harmonic Distortion Vcc=6V, RL=32, Po=120mW, f=1kHz +0.003 % / oC

Vcc=3V, RL=∞, CD=0V -2.5 Power Supply Current

Vcc=3V, R

=∞, CD=2V -0.03

L

uA /

o

C

TS34119 3-11 2004/09 rev. A

Pin Function Description

Symbol Pin Description

CD 1

FC2 2

FC1 3

Vin 4

VO1 5 Amplifier Output #1. The dc level is ≈ (VCC - 0.7) / 2

VCC 6 DC supply voltage (+2.0V ~ +16V) is applied to this pin.

GND 7 Ground pin for the entire circuit.

VO2 8

Chip Disable-Digital input. A logic ”0” (<0.8V) sets normal operation. A logic ”I”（2.0V）sets

the power down mode. Input impedance is nominally 90K

A capacitor at this pin increases power supply rejection, and affects turn-on time. This pin

can be left open it the capacitor at FC1 is sufficient.

Analog ground for the amplifiers. A 1uF capacitor at this pin (with a 5uF capacitor at pin 2)

provides 52dB(typically) of power supply rejection. Turn-on time of the circuit is affected by

the capacitor on this pin. This pin can be used as an alternate input.

Amplifier input. The input capacitor and resistor set low frequency roll off and input

impedance. The feedback resistor is connected to this pin and VO1.

Amplifier Output #2. This signal is equal in amplitude, but 180° out-of-phase with that at

VO1. The dc level is ≈ (V

- 0.7V) / 2.

CC

Typical Application Circuit

TS34119 4-11 2004/09 rev. A