参数资料
型号: AD7817ARU-REEL
厂商: Analog Devices Inc
文件页数: 5/20页
文件大小: 279K
描述: IC ADC 10BIT W/TEMP SNSR 16TSSOP
标准包装: 2,500
功能: 温度监控系统(传感器)
传感器类型: 内部
感应温度: -55°C ~ 125°C
精确度: ±2°C
拓扑: ADC,多路复用器,寄存器库
输出类型: MICROWIRE?,QSPI?,SPI?
输出警报:
输出风扇:
电源电压: 2.7 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 带卷 (TR)
REV. C
AD7816/AD7817/AD7818
5
TIMING CHARACTERISTICS
1, 2
Parameter
A, B Versions
Unit
Test Conditions/Comments
t
POWER-UP
2
祍 max
Power-Up Time from Rising Edge of CONVST
t
1a
9
祍 max
Conversion Time Channels 1 to 4
t
1b
27
祍 max
Conversion Time Temperature Sensor
t
2
20
ns min
CONVST Pulse Width
t
3
50
ns max
CONVST Falling Edge to BUSY Rising Edge
t
4
0
ns min
CS Falling Edge to RD/WR Falling Edge Setup Time
t
5
0
ns min
RD/WR Falling Edge to SCLK Falling Edge Setup
t
6
10
ns min
D
IN
 Setup Time before SCLK Rising Edge
t
7
10
ns min
D
IN
 Hold Time after SCLK Rising Edge
t
8
40
ns min
SCLK Low Pulse Width
t
9
40
ns min
SCLK High Pulse Width
t
10
0
ns min
CS Falling Edge to RD/WR Rising Edge Setup Time
t
11
0
ns min
RD/WR Rising Edge to SCLK Falling Edge Setup Time
t
12
3
20
ns max
D
OUT
 Access Time after RD/WR Rising Edge
t
13
3
20
ns max
D
OUT
 Access Time after SCLK Falling Edge
t
14a
3, 4
30
ns max
D
OUT
 Bus Relinquish Time after Falling Edge of RD/WR
t
14b
3, 4
30
ns max
D
OUT
 Bus Relinquish Time after Rising Edge of CS
t
15
150
ns max
BUSY Falling Edge to OTI Falling Edge
t
16
40
ns min
RD/WR Rising Edge to OTI Rising Edge
t
17
400
ns min
SCLK Rising Edge to CONVST Falling Edge (Acquisition Time of T/H)
NOTES
1
Sample tested during initial release and after any redesign or process change that may affect this parameter. All input signals are measured with tr = tf = 1 ns (10% to
90% of 5 V) and timed from a voltage level of 1.6 V.
2
See Figures 16, 17, 20 and 21.
3
These figures are measured with the load circuit of Figure 3. They are defined as the time required for D
OUT
 to cross 0.8 V or 2.4 V for V
DD
 = 5 V 10% and 0.4 V
or 2 V for V
DD
 = 3 V 10%, as quoted on the specifications page of this data sheet.
4
These times are derived from the measured time taken by the data outputs to change 0.5 V when loaded with the circuit of Figure 3. The measured number is then
extrapolated back to remove the effects of charging or discharging the 50 pF capacitor. This means that the times quoted in the timing characteristics are the true bus
relinquish times of the part and as such are independent of external bus loading capacitances.
Specifications subject to change without notice.
1.6V
I
OL
200A
200A
I
OL
TO
OUTPUT
PIN
C
L
50pF
Figure 3.  Load Circuit for Access Time and Bus Relinquish Time
(V
DD
 = 2.7 V to 5.5 V, GND = 0 V, REF
IN
 = 2.5 V. All specifications T
MIN
 to T
MAX
 unless
otherwise noted)
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