参数资料
型号: AD7678ACPZRL
厂商: Analog Devices Inc
文件页数: 24/28页
文件大小: 0K
描述: IC ADC 18BIT SAR W/BUFF 48LFCSP
标准包装: 2,500
系列: PulSAR®
位数: 18
采样率(每秒): 100k
数据接口: 串行,并联
转换器数目: 1
功率耗散(最大): 26mW
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-VFQFN 裸露焊盘,CSP
供应商设备封装: 48-LFCSP-VQ(7x7)
包装: 带卷 (TR)
输入数目和类型: 1 个差分,双极
配用: EVAL-AD7678CB-ND - BOARD EVALUATION FOR AD7678
AD7678
Rev. A | Page 5 of 28
TIMING SPECIFICATIONS
Table 3. –40°C to +85°C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.
Parameter
Symbol
Min
Typ
Max
Unit
Convert Pulse Width
t1
10
ns
Time between Conversions
t2
10
μs
CNVST LOW to BUSY HIGH Delay
t3
35
ns
BUSY HIGH All Modes Except Master Serial Read after Convert
t4
1.5
μs
Aperture Delay
t5
2
ns
End of Conversion to BUSY LOW Delay
t6
10
ns
Conversion Time
t7
1.5
μs
Acquisition Time
t8
8.5
μs
RESET Pulsewidth
t9
10
ns
CNVST LOW to Data Valid Delay
t10
1.5
μs
Data Valid to BUSY LOW Delay
t11
20
ns
Bus Access Request to Data Valid
t12
45
ns
Bus Relinquish Time
t13
5
15
ns
Refer to Figure 33 and Figure 34 (Master Serial Interface Modes)1
CS LOW to SYNC Valid Delay
t14
10
ns
CS LOW to Internal SCLK Valid Delay
t15
10
ns
CS LOW to SDOUT Delay
t16
10
ns
CNVST LOW to SYNC Delay
t17
525
ns
SYNC Asserted to SCLK First Edge Delay2
t18
3
ns
Internal SCLK Period2
t19
25
40
ns
Internal SCLK HIGH2
t20
12
ns
Internal SCLK LOW2
t21
7
ns
SDOUT Valid Setup Time2
t22
4
ns
SDOUT Valid Hold Time2
t23
2
ns
SCLK Last Edge to SYNC Delay2
t24
3
ns
CS HIGH to SYNC HI-Z
t25
10
ns
CS HIGH to Internal SCLK HI-Z
t26
10
ns
CS HIGH to SDOUT HI-Z
t27
10
ns
BUSY HIGH in Master Serial Read after Convert2
t28
CNVST LOW to SYNC Asserted Delay
t29
1.5
μs
SYNC Deasserted to BUSY LOW Delay
t30
25
ns
Refer to Figure 35 and Figure 36 (Slave Serial Interface Modes)
External SCLK Setup Time
t31
5
ns
External SCLK Active Edge to SDOUT Delay
t32
3
18
ns
SDIN Setup Time
t33
5
ns
SDIN Hold Time
t34
5
ns
External SCLK Period
t35
25
ns
External SCLK HIGH
t36
10
ns
External SCLK LOW
t37
10
ns
1In serial interface modes, the SYNC, SCLK, and SDOUT timings are defined with a maximum load CL of 10 pF; otherwise, the load is 60 pF maximum.
2In Serial Master Read during Convert mode. See Table 4 for Serial Master Read after Convert mode.
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