Texas Instruments BP-DAC61402EVM, Руководство пользователя, Страница: 9 / 31

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System Setup
9 SLAU825 – June 2020
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Copyright © 2020, Texas Instruments Incorporated
BP-DAC81404EVM, BP-DAC61402EVM
2.2.1 Power Configurations and Jumper Settings
The BP-DAC81404EVM, BP-DAC61402EVM provide electrical connections to the device supply pins. The
connectors and optional configurations are shown in
Table 5 , and Table 6 shows the EVM jumper
settings.
Table 5. BP-DAC81404EVM, BP-DAC61402EVM Power Supply Inputs
BP-DAC81404EVM, BP-DAC61402EVM
Connector
Supply Name Voltage Range (Max)
J17: Pin 1 DAC_VDD 0 to 5.5 V
J17: Pin 2 GND –0.3 to 0.3 V
J17: Pin 3 GND –0.3 to 0.3 V
J17: Pin 4 DAC_AVDD 41.5 V
J17: Pin 5 DAC_AVSS –21.5 V
NOTE: A
VDD
- A
VSS
must not exceed 42 V.
Table 6. BP-DAC81404EVM, BP-DAC61402EVM Jumper Settings
Jumper Description Default Position Alternate Position
J2 LDAC Pulldown 1–2 : LDAC is LOW None: LDAC is HIGH
J3 CLR Pulldown None: CLR is HIGH 1–2 : CLR is LOW
J5 VSENSE_N_A 1–2: VSENSE_N_A is ground None
J6 VSENSE_N_B 1–2: VSENSE_N_B is ground None
J7 VSENSE_N_C 1–2: VSENSE_N_C is ground None
J8 VSENSE_N_D 1–2: VSENSE_N_D is ground None
J11 DAC_AVSS (Bipolar/Unipolar
Selection) 2–3: DAC is in Unipolar power
supply mode, AVSS to ground 1–2 : DAC is in Bipolar power supply
mode, AVSS can be up to –21.5 V
J14 High Current Stage Enable/Disable None : DAC V
OUT
is not connected
to high current Stage
1–2: DAC output Channel B is connected
to High current stage
J16 External Reference None : External Reference is not
connected to REFIO 1–2: External reference of 2.5 V is
connected to REFIO
J18 100 Ω l oad connection for high
current stage
None : High current output stage is
unloaded 1–2: High current output stage is loaded
with 100
Ω
J19 External DAC IOVDD 2–3 : DAC IOVDD is provided by
LaunchPad Interface 1–2: DAC IOVDD is provided by external
connector J20
J21 Input ground for High Current
Output stage 1–2: Input for high current output
stage is grounded to minimize
power consumption when in
disabled state. None : Input is provided by DAC V
OUT
from channel B
2.2.2 Connecting the Hardware
After the LaunchPad firmware is upgraded as described in Section 2.1.2 , and power and jumper
configurations done as per Section 2.2.1 , the BP-DAC81404EVM or BP-DAC61402EVM and the
LaunchPad can be connected as Figure 5 shows. Connect the USB cable from the LaunchPad OTG USB
port (U7) to the PC.
2.2.3 Electrostatic Discharge Caution
Many of the components on the BP-DAC81404EVM, BP-DAC61402EVM and the LaunchPad are
susceptible to damage by electrostatic discharge (ESD). Observe proper ESD handling precautions when
unpacking and handling the EVM, including the use of a grounded wrist strap at an approved ESD
workstation.