Datasheet
Stereo, High-Power, Class D Amplifiers
MAX98400A/MAX98400B
12
Pin Descriptions
Pin Configurations
N.C.
INR+
GND
GND
INL+
LIM_TH
MONO
INL-
INR-PGND
PVDD
PVDD
PGND
PGND
N.C.
N.C.
18
17
16
15
14
13
12
11
10
OUTL+
V
S
N.C.
G2
OUTL+
N.C.
OUTL-
OUTL-
OUTR-
N.C.
OUTR+
OUTR+
N.C.
SHDN
RELEASE
TEMPLOCK
OUTR-
TQFN
TOP VIEW
PVDD
G1
PGND
1 2 3 4 5 6 7 8
28
29
30
31
32
33
34
35
36
9
27
26 25 24 23 22 21 20 19
+
EP
TQFN
19
20
21
22
1 2 3 4 5 6
18 17 16 15 14 13
23
24
12
11
10
9
8
7
PGND
PVDD
PGND
PVDD
PGND
OUTL-
OUTL-
OUTL+
V
S
G1
G2
OUTR
-
OUTR
-
SHDN
RELEASE
TEMPLOCK
PGND
INR+
GND
INR-
INL-
LIM_TH
INL+
OUTR+
TOP VIEW
+
EP
MAX98400A
MAX98400B
PIN
NAME FUNCTION
MAX98400A MAX98400B
1, 2 1, 2 OUTL- Negative Left Speaker Output
3, 7, 18, 22,
25, 28, 36
— N.C. No Connection
4, 5 3 OUTL+ Positive Left Speaker Output
6 4 V
S
5V Regulator Supply. Bypass V
S
to GND with a 1μF capacitor. Connect to a
+5V source for dual-supply operation.
8 5 G1 Three-State Input for Gain Selection 1. See the Detailed Description section.
9 6 G2 Three-State Input for Gain Selection 2. See the Detailed Description section.
10 7 LIM_TH
See the Limiter Threshold Control (LIM_TH) section for details.
Connect to:
1) V
S
to disable limiter.
2) GND to have no clipping.
3) R
LIM1
resistor to GND to have a PVDD tracking threshold.
4) R
LIM1
and R
LIM2
resistor-divider to have an absolute threshold.