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參數(shù)資料
| 型號(hào)： | AD7818AR-REEL |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | 3/5V, 1 MSPS, 8-Bit, Serial Interface Sampling ADC; Package: SOIC; No of Pins: 8; Temperature Range: Commercial |
| 中文描述： | 與單核和4通道，9我們，10位ADC片上溫度傳感器 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 279K |
| 代理商： | AD7818AR-REEL |
REV. C
–14–
AD7816/AD7817/AD7818
DB7 – DB0
DB7(DB9) – DB0
D
OUT
CONVST
SCLK
BUSY
CS
RD/
WR
D
IN
OTI
t
2
t
1
t
17
t
15
t
16
t
3
Figure 16. Mode 1 Operation
TIME – secs
T
0.8
–0.010
16
4
6
10
12
0.5
0.2
0.7
0.4
0.0
AIR
0.6
0.3
0.1
2
8
14
FLUID
HEAT SINK
Figure 14. Self-Heating Effect in Air, Fluid, and in Thermal
Contact with a Heat Sink
TIME – secs
T
0.25
–0.05
0.0
2.0
0.5
1.5
0.15
0.05
0.10
0.00
AIR
1.0
FLUID
HEATSINK
0.20
Figure 15. Self-Heating Effect in Air, Fluid, and in Thermal
Contact with a Heat Sink
OPERATING MODES
The AD7816, AD7817, and AD7818 have two possible modes
of operation depending on the state of the
CONVST
pulse at
the end of a conversion.
Mode 1
In this mode of operation the
CONVST
pulse is brought high
before the end of a conversion, i.e., before the BUSY goes low
(see Figure 16). When operating in this mode a new conversion
should not be initiated until 100 ns after the end of a serial read
operation. This quiet time is to allow the track/hold to accu-
rately acquire the input signal after a serial read.
Mode 2
When the AD7816, AD7817, and AD7818 are operated in Mode
2 (see Figure 17), they automatically power down at the end of
a conversion. The
CONVST
is brought low to initiate a conver-
sion and is left logic low until after the end of the conversion. At
this point, i.e., when BUSY goes low, the devices will power-
down. The devices are powered up again on the rising edge of
the
CONVST
signal. Superior power performance can be
achieved in this mode of operation by powering up the AD7816,
AD7817, and AD7818 only to carry out a conversion (see Power
vs. Throughput section). In Figure 17 the
CS
line is applicable
to the AD7817 only.
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| AD7818AR-REEL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 10-bit Serial 8-Pin SOIC N T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 100KSPS 10-BIT SERL 8SOIC N - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:1 CH. ADC W/0N-CHIP TEMP SENSOR I.C. - Tape and Reel |
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