參數(shù)資料
型號(hào)： AD7865
廠商： Analog Devices, Inc.
英文描述： Simultaneous Sampling, Fast, 14-Bit ADC(四通道,同時(shí)采樣,高速,14位A/D轉(zhuǎn)換器)
中文描述： 同步采樣，快速，14位ADC（四通道，同時(shí)采樣，高速，14位的A / D轉(zhuǎn)換器）
文件頁(yè)數(shù)： 14/21頁(yè)
文件大?。?/td> 375K
代理商： AD7865
AD7865
–14–
Rev. PrC
DATA
TECHNCAL
can be significant. For example with a throughput rate of
10kSPS the AD7865 will be powered down (I
= 5μA) for
90μs out of every 100μs. See figure 10 below. Therefore
the average power consumption drops to (125/10)mW or
12.5mW approximately.
Figure 9. Using an External Clock
Figure 10. Power Down between Conversion Sequences
CONVST
BUSY
EOC
RD
1 2 3
4 5 6 7 8
9 10 11 12 13 14 1 2
3 4 5 6
7 8 9 10 11 12 13 14 1 2
13 14
CLK
FRSTDATA
COMPLETE
COMPLETE
CONVST
BUSY
STBY
100ms
s
t
BUSY
I
DD
= 20mA
t
BUSY
2m
s
t
WAKEUP
Standby Mode Operation
The AD7865 has a Standby Mode where by the device can
be placed in a low current consumption mode (5μA typ).
The AD7865 is placed in Standby by bringing the logic
input
STBY
low. The AD7865 can be powered again up
for normal operation by bringing
STBY
logic high. The
output data buffers are still operational while the AD7865
is in Standby. This means the user can still continue to
access the conversion results while the AD7865 is in
Standby. This feature can be used to reduce the average
power consumption in a system using low throughput
rates. To reduce the average power consumption the
AD7865 can be placed in Standby at the end of each
conversion sequence, i.e. when BUSY goes low and taken
out of Standby again prior to the start of the next conver-
sion sequence. The time it takes the AD7865 to come out
of Standby is called the "wake up" time. This wake-up
time will limit the maximum throughput rate at which the
AD7865 can be operated when powering down between
conversions. The AD7865 will wake-up in approximately
2μs when using an external reference. The "wake-up"
time is also 2μs when the standby time is less than 1
millisecond while using the internal reference. Figure 12
Shows the wake up time of the AD7865 for standby
times greater than 1 millisecond. Note when the AD7865
is left in Standby for periods of time greater than 1
millisecond the part will require more than 2μs to wake
reference the AD7865 takes 6ms to power up. The
maximum throughput rate which can be achieved when
powering down between conversions is 1/(t
+ 2μs) =
100kSPS approximately. When operating the AD7865 in
a Standby mode between conversions the power savings
相關(guān)PDF資料
PDF描述
AD7868 Complete 12-bit I/O System Containing a DAC And an ADC(完備的12位I\O系統(tǒng)（包含一個(gè)A/D轉(zhuǎn)換器和一個(gè)D/A轉(zhuǎn)換器）)
AD7869 Complete 14-bit I/O System Containing a DAC and a ADC(完備的14位I/O系統(tǒng)（包含一個(gè)A/D轉(zhuǎn)換器和一個(gè)D/A轉(zhuǎn)換器）)
AD7870AJN LC2MOS Complete, 12-Bit, 100 kHz , Sampling ADC
AD7874AN LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
AD7874AQ LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7865AS-1 制造商:Rochester Electronics LLC 功能描述:4 CH. SIMULTANEOUS BIPOLAR,14-B ADC I.C. - Bulk 制造商:Analog Devices 功能描述:Analog-Digital Converter IC Number of Bi
AD7865AS-1REEL 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP T/R 制造商:Rochester Electronics LLC 功能描述:4 CH. SIMULTANEOUS BIPOLAR,14-B ADC I.C. - Tape and Reel
AD7865AS2 制造商:AD 功能描述:*
AD7865AS-2 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP 制造商:Analog Devices 功能描述:IC 14-BIT ADC
AD7865AS-2REEL 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 350KSPS 14BIT PARALLEL 44MQFP - Tape and Reel
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