Datasheet

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4 Power Supplies
J2 is the power-supply input connector. Table 3 lists the configuration details for J2.
Table 3. J2 Configuration: Power-Supply Input
Pin No. Pin Name Function Required
J2.1 +VA External analog supply If 3.3 or 5V supplies not
used
J2.2 –VA Unused No
J2.3 +5VA Unused No
J2.4 –5VA Unused No
J2.5 DGND Digital ground input Yes
J2.6 AGND Analog ground input Yes
J2.7 +1.8VD Unused No
J2.8 VD1 Unused No
J2.9 +3.3VD 3.3V digital supply If 5V or external supplies
not used
J2.10 +5VD +5V digital supply If 3.3V or external
supplies not used
4.1 Power Options
JMP1 is arranged as four rows, each of which can be shorted. Table 4 lists the power option details for
JMP1. For normal operation, all jumpers should be installed.
Table 4. JMP1 Configuration: Power Options
Row Name Function
1-2 VDD1 Supply current measurement
point for Device 1. Must be
connected for operation.
3-4 VDD2 Supply current measurement
point for Device 2. Must be
connected for operation.
5-6 VDD Supply current measurement
point for the other digital devices.
Must be connected for operation.
7-8 GND Connects DGND to AGND.
Switch S1 selects the supply voltage used to feed JMP1 and the respective VDDs shown in Table 4. S1
may be switched to +VA, +5VD, or +3.3VD from power connector J2.
5 EVM Operation
This section provides information on the analog input, digital control, and general operating conditions of
the ADS1115EVM.
5.1 Analog Input
Each of the analog input sources can be applied directly to J1 (top or bottom side) or through
signal-conditioning modules available for the the modular EVM system.
5.2 Digital Control
The digital control signals can be applied directly to J3 (top or bottom side). The modular ADS1115EVM
can also be connected directly to a DSP or microcontroller interface board, such as the 5-6K Interface or
HPA-MCU Interface boards available from Texas Instruments, or the MMB3 if purchased as part of the
ADS1115EVM-PDK. For a list of compatible interface and/or accessory boards for the EVM or the
ADS1115, see the relevant product folder on the TI web site.
5
SBAU157B–August 2009–Revised May 2011 ADS1015EVM, ADS1115EVM, ADS1015EVM-PDK, and ADS1115EVM-PDK
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