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參數(shù)資料
| 型號(hào)： | AD7690BRMZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 11/24頁(yè) |
| 文件大小： | 0K |
| 描述： | IC ADC 18BIT 400KSPS 10MSOP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| 位數(shù)： | 18 |
| 采樣率（每秒）： | 400k |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 20mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°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(gè)差分，雙極 |
| 產(chǎn)品目錄頁(yè)面： | 778 (CN2011-ZH PDF) |
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AD7690
Rev. B | Page 19 of 24
CS MODE, 4-WIRE WITHOUT BUSY INDICATOR
This mode is usually used when multiple AD7690s are connected
to an SPI-compatible digital host.
A connection diagram example using two AD7690s is shown in
With SDI high, a rising edge on CNV initiates a conversion,
selects the CS mode, and forces SDO to high impedance. In this
mode, CNV must be held high during the conversion phase and
the subsequent data readback. (If SDI and CNV are low, SDO is
driven low.) Prior to the minimum conversion time, SDI can be
used to select other SPI devices, such as analog multiplexers,
but SDI must be returned high before the minimum conversion
time elapses and then held high for the maximum possible
conversion time to avoid the generation of the busy signal
indicator. When the conversion is complete, the AD7690 enters
the acquisition phase and powers down. Each ADC result can
be read by bringing its SDI input low, which consequently
outputs the MSB onto SDO. The remaining data bits are 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 it has an acceptable hold time. After the 18th SCK
falling edge or when SDI goes high (whichever occurs first), SDO
returns to high impedance and another AD7690 can be read.
DATA IN
CLK
CS1
CONVERT
CS2
DIGITAL HOST
CNV
SCK
SDO
SDI
CNV
SCK
SDO
SDI
AD7690
05
79
2-
0
1
5
Figure 38. 4-Wire CS Mode Without Busy Indicator Connection Diagram
SDO
D17
D16
D15
D1
D0
tDIS
SCK
12
3
34
35
36
tHSDO
tDSDO
tEN
CONVERSION
ACQUISITION
tCONV
tCYC
tACQ
ACQUISITION
SDI(CS1)
CNV
tSSDICNV
tHSDICNV
D1
16
17
tSCK
tSCKL
tSCKH
D0
D17
D16
19
20
18
SDI(CS2)
05
79
2-
0
16
Figure 39. 4-Wire CS Mode Without Busy Indicator Serial Interface Timing
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| AD7690BRMZ-RL7 | 功能描述:IC ADC 18BIT 400KSPS 10-MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端，雙極 |
| AD7690BRNZ | 制造商:Analog Devices 功能描述: |
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| AD76911 | 制造商:AD 制造商全稱:Analog Devices 功能描述:18-Bit, 2 MSPS PulSAR 15 mW ADC in LFCSP (QFN) |
| AD7691BCPZ-R2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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