t3 BUSY CS, RD CNVST SYNC SCLK SDOUT 12 3 14 15 16 D15 D14 D2 D1 D0 X EXT/ INT = 0 RD" />
參數(shù)資料
型號(hào): EVAL-AD7676CBZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 7/20頁(yè)
文件大?。?/td> 0K
描述: BOARD EVALUATION FOR AD7676
標(biāo)準(zhǔn)包裝: 1
系列: PulSAR®
ADC 的數(shù)量: 1
位數(shù): 16
采樣率(每秒): 500k
數(shù)據(jù)接口: 串行,并聯(lián)
輸入范圍: ±VREF
在以下條件下的電源(標(biāo)準(zhǔn)): 67mW @ 500kSPS
工作溫度: -40°C ~ 85°C
已用 IC / 零件: AD7676
已供物品:
相關(guān)產(chǎn)品: AD7676ASTZRL-ND - IC ADC 16BIT DIFF INP 48LQFP
AD7676ASTZ-ND - IC ADC 16BIT 500KSPS DIFF 48LQFP
REV. B
AD7676
–15–
t3
BUSY
CS, RD
CNVST
SYNC
SCLK
SDOUT
12
3
14
15
16
D15
D14
D2
D1
D0
X
EXT/
INT = 0
RDC/SDIN = 0
INVSCLK = INVSYNC = 0
t14
t20
t15
t16
t22
t23
t29
t28
t18
t19
t21
t30
t25
t24
t26
t27
Figure 17. Master Serial Data Timing for Reading (Read after Conversion)
EXT/
INT = 0
RDC/SDIN = 1
INVSCLK = INVSYNC = 0
D15
D14
D2
D1
D0
X
12
3
14
15
16
BUSY
SYNC
SCLK
SDOUT
CS, RD
CNVST
t3
t1
t17
t14
t15
t19
t20
t21
t16
t22
t23
t24
t27
t26
t25
t18
Figure 18. Master Serial Data Timing for Reading (Read Previous Conversion during Conversion)
SERIAL INTERFACE
The AD7676 is configured to use the serial interface when the
SER/
PAR is held HIGH. The AD7676 outputs 16 bits of data
MSB first, on the SDOUT pin. This data is synchronized with
the 16 clock pulses provided on the SCLK pin.
MASTER SERIAL INTERFACE
Internal Clock
The AD7676 is configured to generate and provide the serial data
clock SCLK when the EXT/
INT pin is held LOW. The AD7676 also
generates a SYNC signal to indicate to the host when the serial
data is valid. The serial clock SCLK and the SYNC signal can be
inverted if desired. The output data is valid on both the rising
and falling edges of the data clock. Depending on RDC/SDIN
input, the data can be read after each conversion or during the
following conversion. Figures 17 and 18 show the detailed timing
diagrams of these two modes.
Usually, because the AD7676 has a longer acquisition phase
than the conversion phase, the data is read immediately after
conversion. That makes the mode master, read after conversion,
the most recommended serial mode when it can be used.
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