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参数资料
| 型号： | EVAL-AD7796EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 20/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7796 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 16 |
| 采样率（每秒）： | 123 |
| 数据接口： | 串行 |
| 输入范围： | ±VREF/128 |
| 在以下条件下的电源（标准）： | 1.6mW @ 123SPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7796 |
| 已供物品： | 板，CD |
| 相关产品： | AD7796BRUZ-REEL-ND - IC ADC 16BIT SIG-DEL 1CH 16TSSOP AD7796BRUZ-ND - IC ADC 16BIT SIG-DEL 1CH 16TSSOP |
AD7796/AD7797
Rev. A | Page 5 of 24
TIMING CHARACTERISTICS
AVDD = 2.7 V to 5.25 V, DVDD = 2.7 V to 5.25 V, GND = 0 V, Input Logic 0 = 0 V, Input Logic 1 = DVDD, unless otherwise noted.
Table 2.
Parameter1, 2
Limit at TMIN, TMAX (B Version)
Unit
Conditions/Comments
t3
100
ns min
SCLK high pulse width
t4
100
ns min
SCLK low pulse width
Read Operation
t1
0
ns min
CS falling edge to DOUT/RDY active time
60
ns max
DVDD = 4.75 V to 5.25 V
80
ns max
DVDD = 2.7 V to 3.6 V
t23
0
ns min
SCLK active edge to data valid delay4
60
ns max
DVDD = 4.75 V to 5.25 V
80
ns max
DVDD = 2.7 V to 3.6 V
10
ns min
Bus relinquish time after CS inactive edge
80
ns max
t6
0
ns min
SCLK inactive edge to CS inactive edge
t7
10
ns min
SCLK inactive edge to DOUT/RDY high
Write Operation
t8
0
ns min
CS falling edge to SCLK active edge setup time4
t9
30
ns min
Data valid to SCLK edge setup time
t10
25
ns min
Data valid to SCLK edge hold time
t11
0
ns min
CS rising edge to SCLK edge hold time
1 Sample tested during initial release to ensure compliance. All input signals are specified with tR = tF = 5 ns (10% to 90% of DVDD) and timed from a voltage level of 1.6 V.
3 These numbers are measured with the load circuit of Figure 2 and defined as the time required for the output to cross the VOL or VOH limits.
4 SCLK active edge is falling edge of SCLK.
5 These numbers are derived from the measured time taken by the data output to change 0.5 V when loaded with the circuit of Figure 2. 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 parts and, as such, are independent of external bus loading capacitances.
6
RDY returns high after a read of the ADC. In single conversion mode and continuous conversion mode, the same data can be read again, if required, while RDY is high.
Care should be taken to ensure that subsequent reads do not occur close to the next output update. In continuous read mode, the digital word can be read only once.
ISINK (1.6mA WITH DVDD =5V,
100AWITHDVDD =3V)
ISOURCE (200A WITH DVDD =5V,
100AWITHDVDD =3V)
1.6V
TO
OUTPUT
PIN
50pF
06
083
-0
02
Figure 2. Load Circuit for Timing Characterization
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