參數資料
型號: EVAL-AD7898CB
廠商: Analog Devices, Inc.
英文描述: Evaluation Board for 5V, 12-Bit, Serial 220kSPS ADC in 8-Pin Package
中文描述: 評估板為5V,12位,串行220kSPS ADC的8引腳封裝
文件頁數: 2/13頁
文件大?。?/td> 424K
代理商: EVAL-AD7898CB
EVAL-AD7898CB
–2–
REV. 0
L INK A ND SWIT C H OPT IONS
T here are 11 link options which must be set for the required operating setup before using the evaluation board. T he
functions of these options are outlined below.
L ink No.
L K 1
F unction.
T his link option adds a 50
Ohm termination to AGND at the Vin socket. In most applications this link will
be left unconnected. If a 50
Ohm termination is required, this link should be inserted.
T his link is used to connect the input of the AD711 op-amp to ground if the user needs to do this.
When this link is in position "A" a signal applied to the VIN socket is routed to the input of the AD711 op-
amp. T his is the normal application for this link.
When this link is in position "B", the input of the AD711 op-amp is tied to GND.
T his link is used to select the source of the reference voltage applied to the AD7898 REFIN pin.
When this link is in position "A", the AD780 provides the 2.5V reference to the AD7898.
When this link is in position "B" an external reference must be supplied via J5.
T his link selects the source of the V
DD
+5V supply.
When this link is in position "A" the +5V is supplied from the EVALUAT ION-BOARD CONT ROLLER.
When this link is in position "B" the +5V must be supplied from an external source via J2.
T his link option selects the source of the
CS/CONVST
input.
When this link is in position "A" the
CS/CONVST
input is provided by the EVAL UAT ION-BOARD
C ON T R OL L E R .
When this link is in position "B" the
CS/CONVST
input is provided via the external socket, J6.
T his link option selects the source of the
VDRIVE
input.
When this link is in position "A" the
VDRIVE
supply voltage is provided from VDD.
When this link is in position "B" an external VDRIVE supply voltage must be supplied via J7.
T his link link option selects the source of the SCLK input.
When this link is in position "A" the SCLK input is provided by the EVALUAT ION-BOARD CONT ROL-
L E R .
When this link is in position "B" the SCLK input is provided via the external socket, J9.
T his link option is used to select the source of the +12V supply
In position A, the +12V is supplied from the EVALUAT ION-BOARD CONT ROLLER through the 96 way
connector.
In position B, the +12V is supplied from an external source through the power connector, J3.
T his link option is used to select the source of the -12V supply.
In position A, the -12V is supplied from the EVALUAT ION-BOARD CONT ROLLER through the 96 way
connector.
In position B, the -12V is supplied from an external source through the power connector, J3.
T hese two link options are used to add an invertor to the SCLK path.
When both these links are in position "A", for slower SCLK frequencies, giving valid data on the rising edge.
When both these links are in position "B", for fast SCLK frequencies, giving valid data on the falling edge,
the SCLK signal is connected directly to the AD7898 SCLK pin. "B" is the normal position for these 2 link
options.
L K 2
L K 3
L K 4
L K 5
L K 6
L K 7
L K 8
L K 9
L K 10 L K 11
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