Datasheet

Stereo, High-Power, Class D Amplifiers
MAX98400A/MAX98400B
6
Note 2: 100% production tested at T
A
= +25NC. Specifications over temperature limits are guaranteed by design.
Note 3: The MAX98400A stereo mode is specified with an 8I resistive load in series with a 68FH inductive load connected across
BTL outputs. The MAX98400A mono mode is specified with a 4I resistive load in series with 33FH inductive load. The
MAX98400B is specified with an 8I resistive load in series with a 68FH inductive load connected across BTL outputs.
Note 4: Amplifier inputs AC-coupled to GND.
Note 5: Mode transitions controlled by SHDN.
Note 6: Relative to equivalent full-scale undistorted output. Full scale (FS) = V
PVDD
x 0.95.
Note 7: Relative to equivalent full-scale undistorted output. Full scale (FS) = V
PVDD
.
ELECTRICAL CHARACTERISTICS (continued)
(V
PVDD
= 18V, C
IN
= 1FF, V
SHDN
= 5V, LIM_TH = V
S
, TEMPLOCK = unconnected; G1 = GND, G2 = open (gain = 20.1dB), C
REL
= 1FF, C1 = C2 = 1FF, R
L
= J, AC measurement bandwidth 20Hz to 20kHz, differential input signal, T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25NC.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VGA Distortion Compression = 0 to -12dB 3.5 %
LIM_TH Input-Voltage Low
(PVDD Tracking)
0.15 V
LIM_TH Input-Voltage High
(Limiter Off)
V
S
- 1
V
Channel-to-Channel Attenuation
Tracking
Q1
dB
THERMAL FOLDBACK
Internal Templock Resistor 120 205 310
kI
Trigger Temperature +130
NC
Hard Thermal Protection +165
NC
LOGIC INPUT (G1, G2)
Sink Current
T
A
= +25NC, V
G1
, V
G2
= 0V
+2.5 +5 +8
FA
Source Current
T
A
= +25NC, V
G1
, V
G2
= V
S
-8 -5 -2.5
FA
Input High Threshold
0.8 x
V
S
V
Input Low Threshold
0.3 x
V
S
V
Input Three-State Window
0.45 x
V
S
0.5 x
V
S
0.55 x
V
S
V
LOGIC INPUT (SHDN, MONO (MAX98400A Only))
Input Leakage Current I
IN
T
A
= +25NC Q10 FA
Input High Threshold V
INH
2 V
Input Low Threshold V
INL
0.4 V
Input-Voltage Hysteresis 100 mV