Datasheet

MAX4295
Mono, 2W, Switch-Mode (Class D)
Audio Power Amplifier
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= PV
CC
= +5V, SHDN = V
CC
, FS1 = GND, FS2 = V
CC
(f
OSC
= 250kHz), input amplifier gain = -1V/V, T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are T
A
= +25°C.)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
Input Voltage Range
0 to 0.6
x V
CC
V
R
L
= 8Ω 0.4
V
CC
= +3V, f
IN
= 1kHz
R
L
= 4Ω 0.7
R
L
= 8Ω 1.2
Maximum Output Power
V
CC
= +5V, f
IN
= 1kHz
R
L
= 4Ω 2
W
Total Harmonic Distortion Plus
Noise
R
L
= 4Ω, f
IN
= 1kHz, P
O
= 1W, f
OSC
= 125kHz 0.4 %
Efficiency MAX4295, R
L
= 4Ω, f
IN
= 1kHz, P
O
= 2W 87 %
LOGIC INPUTS (SHDN, FS1, FS2)
Logic Input Current V
LOGIC
= 0 to V
CC
1 100 nA
Logic Input High Voltage
0.7 ×
V
CC
V
Logic Input Low Voltage
0.3 ×
V
CC
V
INPUT AMPLIFIER
Input Offset Voltage
±0.5
±4
mV
V
OS
Temp Coefficient ±5
µV/°C
Input Bias Current (Note 3)
±0.05
±25 nA
Input Noise-Voltage Density f = 10kHz 32
nV/√Hz
Input Capacitance 2.5 pF
Output Resistance
0.01
Ω
AOUT Disabled Mode Leakage
Current
SHDN = GND, V
AOUT
= 0 to V
CC
±0.1
±1 µA
AOUT to GND 8
Short-Circuit Current
AOUT to V
CC
65
mA
Large-Signal Voltage Gain V
OUT
= 0.2V to 4.6V, R
L(OPAMP)
= 10kΩ 78
115
dB
V
CC
- V
OH
40 250
AOUT Voltage Swing
V
DIFF
≥ 10mV,
R
L(OPAMP)
= 10kΩ
V
OL
40 100
mV
Gain-Bandwidth Product
1.25
MHz
Power-Supply Rejection V
CC
= +2.7V to +5.5V 66 90 dB
Maximum Capacitive Load No sustained oscillations
200
pF
Note 1: All devices are 100% production tested at T
A
= 25°C. All temperature limits are guaranteed by design.
Note 2: Supply Voltage Range guaranteed by PSRR of input amplifier, frequency, duty cycle, and H-bridge on-resistance.
Note 3: Guaranteed by design, not production tested.