参数资料
型号: AD7452BRTZ-R2
厂商: Analog Devices Inc
文件页数: 26/29页
文件大小: 0K
描述: IC ADC 12BIT 555KSPS SOT23-8
标准包装: 1
位数: 12
采样率(每秒): 555k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 7.25mW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SOT-23-8
供应商设备封装: SOT-23-8
包装: 标准包装
输入数目和类型: 1 个差分,双极
产品目录页面: 777 (CN2011-ZH PDF)
其它名称: AD7452BRTZ-R2DKR
AD7452
Rev. B | Page 5 of 28
TIMING SPECIFICATIONS
Guaranteed by characterization. All input signals are specified with tr = tf = 5 ns (10% to 90% of VDD) and timed from a 1.6 V voltage
level. See Figure 2 and the Serial Interface section.
VDD = 2.7 V to 3.6 V, fSCLK = 10 MHz, fS = 555 kSPS, VREF = 2.0 V; VDD = 4.75 V to 5.25 V, fSCLK = 10 MHz, fS = 555 kSPS, VREF = 2.5 V;
VCM1 = VREF
A
MIN
MAX
; T = T
to T
, unless otherwise noted.
Table 2.
Parameter
Limit at TMIN, TMAX
Unit
Description
fSCLK 2
10
kHz min
10
MHz max
tCONVERT
16 × tSCLK
tSCLK = 1/fSCLK
1.6
s max
tQUIET
60
ns min
Minimum quiet time between the end of a serial read and the next falling edge of CS
t1
10
ns min
Minimum CS pulse width
t2
10
ns min
CS falling edge to SCLK falling edge setup time
t33
20
ns max
Delay from CS falling edge until SDATA three-state disabled
t43
40
ns max
Data access time after SCLK falling edge
t5
0.4 tSCLK
ns min
SCLK high pulse width
t6
0.4 tSCLK
ns min
SCLK low pulse width
t7
10
ns min
SCLK edge to data valid hold time
t8 4
10
ns min
SCLK falling edge to SDATA three-state enabled
35
ns max
SCLK falling edge to SDATA three-state enabled
tPOWER-UP5
1
s max
Power-up time from full power-down
t3
t2
t4
t7
t8
t6
t1
t5
tQUIET
tCONVERT
CS
SCLK
SDATA
4 LEADING ZEROS
THREE-STATE
12
3
4
5
13
14
15
16
0
DB11
DB10
DB2
DB1
DB0
B
03154-A
-002
Figure 2. Serial Interface Timing Diagram
1 Common-mode voltage.
2 Mark/space ratio for the SCLK input is 40/60 to 60/40.
3 Measured with the load circuit of
and defined as the time required for the output to cross 0.8 V or 2.4 V with V
Figure 3
Figure 3.
DD
= 5 V, or 0.4 V or 2.0 V for VDD = 3 V.
4 t8 is derived from the measured time taken by the data outputs to change 0.5 V when loaded with the circuit of
The measured number is then extrapolated
back to remove the effects of charging or discharging the 25 pF capacitor. This means that the time, t8, quoted in the Timing Specifications is the true bus relinquish
time of the part and is independent of the bus loading.
5 See
section.
Power-Up Time
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