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Power-Supply Connections
4
Power-Supply Connections
The power-supply connections for the ALM2403Q1EVM are provided through connector J7 at the top of
the EVM.
Table 3
each supply connection.
Pin Number
J7.1
J7.2
The ALM2403Q1 is configured to use a single supply connected through J7.1 (VCC) and J7.2 (GND). By
default, jumper J5 is set to shunt pins 2-3 placing a Schottky diode (D1) in series with the power supply
connection. The Schottky diode blocks any reverse current into the VCC_S supply during a fault condition
when the output of the amplifier is shorted to a higher potential than the VCC_S supply. Place J5 to shunt
pins 1-2 to bypass the optional diode (D1).
connections.
J5
Power-Supply
GND
Connector
J7
2
1
6
ALM2403-Q1 Evaluation Module
summarizes the pin definition for supply connector J7, and the allowed voltage range for
Table 3. ALM2403Q1EVM Supply-Range Specifications
Supply Connection
Input stage supply (VCC)
1 2 3
VCC_S
D1
C18
10 µF
Figure 3. ALM2403Q1EVM Voltage Supply Connections
Copyright © 2020, Texas Instruments Incorporated
Ground
Figure 3
shows the ALM2403Q1EVM voltage supply
VCC_S
C4
100 nF
U1 ALM2403-Q1
11
VCC
1
IN1±
-
-
A1
2
IN1+
+
C19
4
100 nF
IN2+
+
A2
GND
5
IN2±
-
3
SH_DN/OTF
6
GND
Voltage Range
5 V to 24 V
0 V
VCC_S
12
VCC
+
13
OUT1
EN
VCC_S
10
VCC
+
9
OUT2
EN
8
NC
7
EN
NC
14
GND
Thermal
15
Shutdown
GND
SBOU236 – February 2020
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C5
100 nF
C10
100 nF
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