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AD7888ARU-REEL bảng dữ liệu(PDF) 4 Page - Analog Devices

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Giải thích chi tiết về linh kiện  2.7 V to 5.25 V, Micropower, 8-Channel, 125 kSPS, 12-Bit ADC in 16-Lead TSSOP
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AD7888
–4–
Limit at TMIN, TMAX
(A, B Versions)
Parameter
4.75 V to 5.25 V
2.7 V to 3.6 V
Unit
Description
fSCLK
2
2
2
MHz max
tCONVERT
14.5 tSCLK
14.5 tSCLK
tACQ
1.5 tSCLK
1.5 tSCLK
Throughput Time = tCONVERT + tACQ = 16 tSCLK
t1
10
10
ns min
CS to SCLK Setup Time
t2
3
30
60
ns max
Delay from
CS until DOUT 3-State Disabled
t3
3
75
100
ns max
Data Access Time after SCLK Falling Edge
t4
20
20
ns min
Data Setup Time Prior to SCLK Rising Edge
t5
20
20
ns min
Data Valid to SCLK Hold Time
t6
0.4 tSCLK
0.4 tSCLK
ns min
SCLK High Pulsewidth
t7
0.4 tSCLK
0.4 tSCLK
ns min
SCLK Low Pulsewidth
t8
4
80
80
ns max
CS Rising Edge to DOUT High Impedance
t9
55
µs typ
Power-Up Time from Shutdown
NOTES
1Sample tested at 25
°C to ensure compliance. All input signals are specified with tr = tf = 5 ns (10% to 90% of V DD) and timed from a voltage level of 1.6 V.
2Mark/Space ratio for the SCLK input is 40/60 to 60/40. See Serial Interface section.
3Measured with the load circuit of Figure 1 and defined as the time required for the output to cross 0.8 V or 2.4 V with V
DD = 5 V
± 10% and time for an output to
cross 0.4 V or 2.0 V with VDD = 3 V
± 10%.
4t
8 is derived from the measured time taken by the data outputs to change 0.5 V when loaded with the circuit of Figure 1. The measured number i s then extrapolated
back to remove the effects of charging or discharging the 50 pF capacitor. This means that the time, t 8, quoted in the timing characteristics is the true bus relinquish
time of the part and is independent of the bus loading.
Specifications subject to change without notice.
TIMING SPECIFICATIONS1 (T
A = TMIN to TMAX, unless otherwise noted)
1.6V
IOL
200 A
200 A
IOH
TO
OUTPUT
PIN
CL
50pF
Figure 1. Load Circuit for Digital Output Timing Specifications
REV. C


Số phần tương tự - AD7888ARU-REEL

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Analog Devices
AD7888ARU-REEL AD-AD7888ARU-REEL Datasheet
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REV. C
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Mô tả tương tự - AD7888ARU-REEL

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REV. C
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