參數(shù)資料
型號： EVAL-AD7689EDZ
廠商： Analog Devices Inc
文件頁數(shù)： 16/32頁
文件大?。?/td> 0K
描述： BOARD EVAL AD7689
產(chǎn)品培訓(xùn)模塊： Motor Control
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）： 250k
數(shù)據(jù)接口： 串行
輸入范圍： ±VREF
在以下條件下的電源（標(biāo)準(zhǔn)）： 12.5mW @ 250kSPS，5V
工作溫度： -40°C ~ 85°C
已用 IC / 零件： AD7689
已供物品： 板
Data Sheet
AD7682/AD7689
Rev. D | Page 23 of 32
POWER SUPPLY
SUPPLYING THE ADC FROM THE REFERENCE
The AD7682/AD7689 use two power supply pins: an analog
and digital core supply (VDD) and a digital input/output inter-
face supply (VIO). VIO allows direct interface with any logic
between 1.8 V and VDD. To reduce the supplies needed, the
VIO and VDD pins can be tied together. The AD7682/AD7689
are independent of power supply sequencing between VIO and
VDD. Additionally, it is very insensitive to power supply varia-
tions over a wide frequency range, as shown in Figure 34.
For simplified applications, the AD7682/AD7689, with their
low operating current, can be supplied directly using an
external reference circuit like the one shown in Figure 36. The
reference line can be driven by:
The system power supply directly
A reference voltage with enough current output capability,
such as the ADR43x/ADR44x
A reference buffer, such as the AD8605, which can also
filter the system power supply, as shown in Figure 36
75
70
65
60
55
50
45
40
35
30
1
10k
10
PS
SR
(
d
B
)
100
1k
FREQUENCY (kHz)
07
35
3-
03
4
AD8605
AD7689
VIO
REF
VDD
10F
1F
0.1F
10
10k
5V
1F
1
1OPTIONAL REFERENCE BUFFER AND FILTER.
0.1F
0
73
53
-03
5
Figure 36. Example of an Application Circuit
Figure 34. PSRR vs. Frequency
The AD7682/AD7689 power down automatically at the end of
each conversion phase; therefore, the operating currents and
power scale linearly with the sampling rate. This makes the part
ideal for low sampling rates (even of a few hertz) and low
battery-powered applications.
10,000
1000
100
10
1
0.1
0.010
0.001
10
1M
100
O
P
E
RAT
IN
G
CU
RRE
N
T
(
A
)
1k
10k
100k
SAMPLING RATE (SPS)
0
73
53
-04
0
VDD = 5V, INTERNAL REF
VDD = 5V, EXTERNAL REF
VDD = 2.5V, EXTERNAL REF
VIO
Figure 35. Operating Currents vs. Sampling Rate
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EVAL-AD7689EDZ 制造商:Analog Devices 功能描述:16 Bit A/D Converter Eval. Board
EVAL-AD7690CB 制造商:Analog Devices 功能描述:AD7690 EVAL - Bulk
EVAL-AD7690SDZ 功能描述:BOARD EVAL FOR AD7690 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:PulSAR® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件
EVAL-AD7691CBZ 功能描述:BOARD EVALUATION FOR AD7691CBZ RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:PulSAR® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件
EVAL-AD7691SDZ 功能描述:BOARD EVAL FOR AD7691 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:PulSAR® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件
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