MC34119DTBR2 Datasheet, PDF (3/12 Pages) Freescale Semiconductor, Inc – LOW POWER AUDIO AMPLIFIER

Symbol
CD
FC2
FC1
Vin
VO1
VCC
GND
VO2
MC34119
PIN FUNCTION DESCRIPTION
Pin
Description
1
Chip Disable – Digital input. A Logic “0” (<0.8 V) sets normal operation. A logic “1” (≥2.0 V) sets the power down
mode. Input impedance is nominally 90 kΩ .
2
A capacitor at this pin increases power supply rejection, and affects turn–on time. This pin can be left open if the
capacitor at FC1 is sufficient.
3
Analog ground for the amplifiers. A 1.0 µF capacitor at this pin (with a 5.0 µF capacitor at Pin 2) provides
(typically) 52 dB 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.
4
Amplifier input. The input capacitor and resistor set low frequency rolloff and input impedance. The feedback
resistor is connected to this pin and VO1.
5
Amplifier Output #1. The dc level is ≈ (VCC – 0.7 V)/2.
6
DC supply voltage (+2.0 V to +16 V) is applied to this pin.
7
Ground pin for the entire circuit.
8
Amplifier Output #2. This signal is equal in amplitude, but 180° out–of–phase with that at VO1.
The dc level is ≈ (VCC – 0.7 V)/2.
TYPICAL TEMPERATURE PERFORMANCE (–20° C < TA < +70°C)
Function
Typical Change
Input Bias Current (@ Vin)
Total Harmonic Distortion
(VCC = 6.0 V, RL = 32 Ω. Pout = 125 mW, f = 1.0 kHz)
Power Supply Current
(VCC = 3.0 V, RL = ∞, CD = 0 V)
(VCC = 3.0 V, RL = ∞, CD = 2.0 V)
±40
+0.003
–2.5
–0.03
Units
pA/°C
%/°C
µA/°C
MOTOROLA ANALOG IC DEVICE DATA
3