参数资料
型号: AD7608BSTZ-RL
厂商: Analog Devices Inc
文件页数: 31/32页
文件大小: 0K
描述: IC DAS W/ADC 18BIT 8CH 64LQFP
标准包装: 1,500
类型: 数据采集系统(DAS),ADC
分辨率(位): 18 b
采样率(每秒): 200k
数据接口: DSP,MICROWIRE?,并联,QSPI?,串行,SPI?
电压电源: 模拟和数字
电源电压: 2.3 V ~ 5.25 V,4.75 V ~ 5.25 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 带卷 (TR)
AD7608
Data Sheet
Rev. A | Page 8 of 32
Limit at TMIN, TMAX
Parameter
Min
Typ
Max
Unit
Description
t27
Delay from
AA
RDEE
AA
falling edge to FRSTDATA low
19
ns
VDRIVE = 3.3 V to 5.25 V
24
ns
VDRIVE = 2.3 V to 2.7 V
t28
Delay from 16th SCLK falling edge to FRSTDATA low
17
ns
VDRIVE = 3.3 V to 5.25 V
22
ns
VDRIVE = 2.3 V to 2.7 V
t29
24
ns
Delay from
AA
CSEE
AA
rising edge until FRSTDATA three-state enabled
1
Sample tested during initial release to ensure compliance. All input signals are specified with tR = tF = 5 ns (10% to 90% of VDD) and timed from a voltage level of 1.6 V.
2
The delay between the CONVST x signals was measured as the maximum time allowed while ensuring a <40 LSB performance matching between channel sets.
3
A buffer is used on the data output pins for these measurements, which is equivalent to a load of 20 pF on the output pins.
Timing Diagrams
tCYCLE
t3
t5
t2
t4
t1
t7
tRESET
tCONV
CONVST A/
CONVST B
CONVST A/
CONVST B
BUSY
CS
RESET
08938-
002
Figure 2.CONVST x Timing—Reading After a Conversion
tCYCLE
t3
t5
t6
t2
t1
tCONV
CONVST A/
CONVST B
CONVST A/
CONVST B
BUSY
CS
t7
tRESET
RESET
08938-
003
Figure 3. CONVST x Timing—Reading During a Conversion
DATA:
DB[15:0]
FRSTDATA
CS
RD
INVALID
V1
[17:2]
V1
[1:0]
V2
[17:2]
V8
[17:2]
V8
[1:0]
V2
[1:0]
t10
t8
t13
t24
t26
t27
t14
t11
t9
t16
t17
t29
08938-
004
t15
Figure 4. Parallel Mode Separate
AA
CSEE
AA
and
AA
RDEE
AA
Pulses
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