Datasheet

Low-Power, Low-Offset, Dual Mode, Class H
DirectDrive Headphone Amplifier
MAX97200
3
ELECTRICAL CHARACTERISTICS (continued)
(V
PVIN
= 1.8V, V
PGND
= V
GND
= 0V, V
SHDN
= 1.8V, C1 = C2 = C3 = 1FF, C4 = 10FF, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25NC) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage Threshold V
TH2
R
L
= J, output voltage at which the
charge pump switches modes, V
OUT
rising, transition from high-efficiency
mode to high-power mode
QPVIN
x
0.24
V
Charge-Pump Mode Transition
Timeouts (Figure 2)
t
HOLD
Time it takes for the charge pump to
transition from high-power mode to
high-efficiency mode; R
L
= J
32 ms
t
RISE
Time it takes for the charge pump to
transition from high-efficiency mode to high-
power mode (90% of its value); R
L
= J
20
Fs
AMPLIFIER
Voltage Gain A
V
MAX97200A 2.75 2.92 3.09
dB
MAX97200B -0.17 0 +0.17
Maximum Output Voltage
R
L
= 10kI, THD+N = 1%
1.295
V
PK
R
L
= 10kI, THD+N = 10%
1.44
Channel-to-Channel Gain
Matching
Q0.1
dB
Total Output Offset Voltage V
OS
T
A
= +25NC Q0.1 Q0.3
mV
Input Resistance R
IN
MAX97200A 6 10 14
kI
MAX97200B 7.2 12 16.8
Power-Supply Rejection Ratio PSRR
V
PVDD
= 1.62V to 1.98V, T
A
= +25NC
62 83
dB
100mV
P-P
ripple
f
IN
= 217Hz 96
f
IN
= 1kHz 94
f
IN
= 20kHz 61
Output Power P
OUT
THD+N = 1%
R
L
= 10kI
0.16
mW
R
L
= 32I
34
R
L
= 16I
45
Line Output Voltage V
LINE
R
L
= 10kI
1 V
RMS
Total Harmonic Distortion Plus
Noise
THD+N
R
L
= 16I, P
OUT
= 0.1mW, f
IN
= 1kHz (Note 3)
0.02
%
R
L
= 16I, P
OUT
= 10mW, f
IN
= 1kHz (Note 4)
0.003
R
L
= 10kI, V
OUT
= 1V, f
IN
= 1kHz (Note 4)
0.008
Output Noise V
N
Inputs grounded, A-weighted, MAX97200A 5.6
FV
Inputs grounded, A-weighted, MAX97200B 4.7
Signal-to-Noise Ratio SNR A-weighted, MAX97200B 105 dB
Click-and-Pop Level V
CP
R
L
= 32I, peak
voltage, A-weighted,
32 samples/second,
MAX97200B
Into shutdown 80
dBV
Out of shutdown 68
Crosstalk X
TALK
R
L
= 16I, 1kHz, P
OUT
= 5mW
100 dB
Maximum Capacitive Load 200 pF