AVDD = 2.7 V to 5.25 V, DV
參數(shù)資料
型號(hào)： AD7794BRU-REEL
廠商： Analog Devices Inc
文件頁數(shù)： 37/37頁
文件大?。?/td> 0K
描述： IC ADC 24BIT 6CH LP 24-TSSOP
標(biāo)準(zhǔn)包裝： 2,500
位數(shù)： 24
采樣率（每秒）： 470
數(shù)據(jù)接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 2.5mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 105°C
安裝類型： 表面貼裝
封裝/外殼： 24-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 24-TSSOP
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 6 個(gè)差分，單極；6 個(gè)差分，雙極
配用： EVAL-AD7794EBZ-ND - BOARD EVALUATION FOR AD7794
AD7794/AD7795
Rev. D | Page 8 of 36
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.
2 See Figure 3 and Figure 4.
3 These numbers are measured with the load circuit shown in 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 shown in 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 part and, therefore, 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,
although 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.
04
85
4-
0
02
ISINK (1.6mA WITH DVDD =5V,
100A WITH DVDD =3V)
ISOURCE (200A WITH DVDD =5V,
100A WITH DVDD =3V)
1.6V
TO
OUTPUT
PIN
50pF
Figure 2. Load Circuit for Timing Characterization
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參數(shù)描述
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AD7794CRU 制造商:Analog Devices 功能描述:AFE 6CH 24/16BIT 470HZ 24T 制造商:Analog Devices 功能描述:AFE, 6CH, 24/16BIT, 470HZ, 24TSSOP; IC Function:Analogue Front End Device IC; Supply Voltage Min:2.7V; Supply Voltage Max:5.25V; Operating Temperature Min:-40C; Operating Temperature Max:125C; Digital IC Case Style:TSSOP; No. of ;RoHS Compliant: Yes
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