参数资料
型号: AD7643BCPZ
厂商: Analog Devices Inc
文件页数: 24/28页
文件大小: 0K
描述: IC ADC 18BIT DIFF W/REF 48LFCSP
产品培训模块: ADC Applications
ADC Architectures
ADC DC/AC Performance
标准包装: 1
系列: PulSAR®
位数: 18
采样率(每秒): 1.25M
数据接口: 串行,并联
转换器数目: 1
功率耗散(最大): 80mW
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: 托盘
输入数目和类型: 1 个差分,双极
配用: EVAL-AD7643CBZ-ND - BOARD EVALUATION FOR AD7643
AD7643
Rev. 0 | Page 5 of 28
TIMING SPECIFICATIONS
AVDD = DVDD = 2.5 V; OVDD = 2.3 V to 3.6 V; VREF = 2.5 V; all specifications TMIN to TMAX, unless otherwise noted.
Table 3.
Parameter
Symbol
Min
Typ
Max
Unit
CONVERSION AND RESET (Refer to Figure 30 and Figure 31)
Convert Pulse Width
t1
15
701
ns
Time Between Conversions
t2
800
ns
CNVST Low to BUSY High Delay
t3
23
ns
BUSY High All Modes (Except Master Serial Read After Convert)
t4
550
ns
Aperture Delay
t5
1
ns
End of Conversion to BUSY Low Delay
t6
10
ns
Conversion Time
t7
550
ns
Acquisition Time
t8
250
ns
RESET Pulse Width
t9
15
ns
RESET Low to BUSY High Delay2
t38
10
ns
BUSY High Time from RESET Low2
t39
500
ns
PARALLEL INTERFACE MODES (Refer to Figure 32 to Figure 35 )
CNVST Low to Data Valid Delay
t10
550
ns
Data Valid to BUSY Low Delay
t11
2
ns
Bus Access Request to Data Valid
t12
20
ns
Bus Relinquish Time
t13
2
15
ns
MASTER SERIAL INTERFACE MODES3 (Refer to Figure 36 and Figure 37)
CS Low to SYNC Valid Delay
t14
10
ns
CS Low to Internal SCLK Valid Delay3
t15
10
ns
CS Low to SDOUT Delay
t16
10
ns
CNVST Low to SYNC Delay
t17
135
ns
SYNC Asserted to SCLK First Edge Delay
t18
2
ns
Internal SCLK Period4
t19
8
20
ns
Internal SCLK High4
t20
2
ns
Internal SCLK Low4
t21
2
ns
SDOUT Valid Setup Time4
t22
1
ns
SDOUT Valid Hold Time4
t23
0
ns
SCLK Last Edge to SYNC Delay4
t24
0
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 Convert4
t28
ns
CNVST Low to SYNC Asserted Delay
t29
508
ns
SYNC Deasserted to BUSY Low Delay
t30
13
ns
SLAVE SERIAL INTERFACE MODES (Refer to Figure 39 and Figure 40)
External SCLK Set-Up Time
t31
5
ns
External SCLK Active Edge to SDOUT Delay
t32
1
8
ns
SDIN Set-Up Time
t33
5
ns
SDIN Hold Time
t34
5
ns
External SCLK Period
t35
12.5
ns
External SCLK High
t36
5
ns
External SCLK Low
t37
5
ns
3 In 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.
4 In serial master read during convert mode. See Table 4 for serial master read after convert mode timing specifications.
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