參數(shù)資料
型號： DAC5574EVM
廠商： Texas Instruments, Inc.
英文描述： DAC5574 Evaluation Module(DAC5574評估模塊)
中文描述： DAC5574評估模塊（DAC5574評估模塊）
文件頁數(shù)： 11/39頁
文件大?。?/td> 437K
代理商： DAC5574EVM
Power Requirements
1-3
EVM Overview
1.2
Power Requirements
The following sections describe the power requirements of this EVM.
1.2.1
Supply Voltage
The dc power supply for the digital section (V
DD
) of this EVM is selected
between 3.3 V and 5 V via the 3-position jumper W14. The digital power
connects to the J5-1, J6-9, or J6-10 terminal (when plugged in with another
EVM board or interface card) and is referenced to ground through the J5-2
and J6-5 terminals. The 5 V V
DD
can also come directly from J5-1, bypassing
W14. Therefore, if V
DD
must be powered by 3.3 V via J6-9, any source
connected through J5-1 must be disconnected to prevent damage to the EVM
or other equipment.
Caution
To avoid potential damage to the EVM board or equipments, make
sure that any cable connected to J5-1 is disconnected prior to
supplying 3.3 V V
DD
via J6-9 terminal.
The dc power supply requirements for the analog section of this EVM are as
follows; the V
CC
and V
SS
supplies, typically
±
15 V, can range from
±
4.5 V to
±
18 V. V
CC
and V
SS
connect through J1-3 and J1-1 respectively, or through
J6-1 and J6-2 terminals. 5 VA connects through J5-3 or J6-3 and 3.3 VA
connects through J6-8. All of the analog power supplies are referenced to
analog ground through J1-2 and J6-6 terminals.
The analog power supply for the device under test (U1, U4, or U8) can be
provided by either 5 VA (via J5-3 or J6-3) or by U3 through a resistor
potentiometer, R11, by selecting the proper position of jumper W1. Although
the digital and analog supplies are separate on the EVM to allow flexibility in
supply evaluation, the supplies are treated as one, and considered analog
since the DUT does not have separate analog and digital supply pins.
The V
CC
supply source provides the positive rail of the external output op-amp
(U2) and the voltage reference (U3). The negative rail of U2 can be selected
between V
SS
and AGND via W5 jumper. The external op-amp is installed as
an option to provide output signal conditioning, or for other output
configurations.
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