參數(shù)資料
型號: AD7988-5BRMZ
廠商: Analog Devices Inc
文件頁數(shù): 10/24頁
文件大?。?/td> 0K
描述: ADC 16BIT 500KSPS 1.25LSB 10MSOP
標(biāo)準(zhǔn)包裝: 50
系列: PulSAR®
位數(shù): 16
采樣率(每秒): 500k
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 單電源
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 10-MSOP
包裝: 管件
輸入數(shù)目和類型: 1 個偽差分,單極
AD7988-1/AD7988-5
Data Sheet
Rev. D | Page 18 of 24
CS MODE, 3-WIRE
This mode is typically used when a single AD7988-x is
connected to an SPI-compatible digital host. The connection
diagram is shown in Figure 34, and the corresponding timing is
With SDI tied to VIO, a rising edge on CNV initiates a conver-
sion, selects the CS mode, and forces SDO to high impedance.
When the conversion is complete, the AD7988-x enters the
acquisition phase and powers down.
When CNV goes low, the MSB is output onto SDO. The remaining
data bits are then clocked by subsequent SCK falling edges. The
data is valid on both SCK edges. Although the rising edge can
be used to capture the data, a digital host using the SCK falling
edge allows a faster reading rate, provided that it has an acceptable
hold time. After the 16th SCK falling edge or when CNV goes
high, whichever is earlier, SDO returns to high impedance.
AD7988-1/
AD7988-5
SDO
DATA IN
DIGITAL HOST
CONVERT
CLK
VIO
CNV
SCK
SDI
10231-
035
Figure 34. 3-Wire CS Mode Connection Diagram
tCONV
tCYC
CNV
ACQUISITION
tACQ
tSCK
tSCKL
CONVERSION
SCK
SDO
D15
D14
D13
D1
D0
tEN
tHSDO
1
2
3
14
15
16
tDSDO
tDIS
tSCKH
tCNVH
SDI = 1
10231-
036
Figure 35. 3-Wire CS Mode Serial Interface Timing (SDI High)
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