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AD7992 Datasheet(Fiches technique) 4 Page - Analog Devices

Numéro de pièce AD7992
Description  2-Channel, 12-Bit ADC with I2C Compatible Interface in 10-Lead MSOP
Télécharger  21 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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AD7992
–4–
REV. PrH
PRELIMINARYTECHNICAL DATA
AD7992
Limit at TMIN, TMAX
Parameter
Conditions
MIN
MAX
Unit
Description
t4
Standard Mode
0
3.45
µst
HD;DAT, Data Hold Time
Fast Mode
0
0.9
µs
High-Speed Mode, CB = 100pF max 0
70
ns
High-Speed Mode, CB = 400pF max 0
150
ns
t5
Standard Mode
4.7
µst
SU;STA, Set-up Time for a repeated START
Fast Mode
0.6
µs
Condition
High-Speed Mode
160
ns
t6
Standard Mode
4
µst
HD;STA, Hold Time (repeated) START
Fast Mode
0.6
µs
Condition
High-Speed Mode
160
ns
t7
Standard Mode
4.7
µst
BUF, Bus Free Time Between a STOP and a
Fast Mode
1.3
µs
START Condition.
t8
Standard Mode
4
µst
SU;STO, Set-up Time for STOP Condition
Fast Mode
0.6
µs
High-Speed Mode
160
ns
t9
Standard Mode
-
1000
ns
tRDA, Rise time of SDA signal
Fast Mode
20 + 0.1CB 300
ns
High-Speed Mode, CB = 100pF max 10
80
ns
High-Speed Mode, CB = 400pF max 20
160
ns
t10
Standard Mode
-
300
ns
tFDA, Fall time of SDA signal
Fast Mode
20 + 0.1CB 300
ns
High-Speed Mode, CB = 100pF max 10
80
ns
High-Speed Mode, CB = 400pF max 20
160
ns
t11
Standard Mode
-
1000
ns
tRCL, Rise time of SCL signal
Fast Mode
20 + 0.1CB 300
ns
High-Speed Mode, CB = 100pF max 10
40
ns
High-Speed Mode, CB = 400pF max 20
80
ns
t11A
Standard Mode
-
1000
ns
tRCL1, Rise time of SCL signal after a re-
Fast Mode
20 + 0.1CB 300
ns
peated START Condition and after an
High-Speed Mode, CB = 100pF max 10
80
ns
Acknowledge bit.
High-Speed Mode, CB = 400pF max 20
160
ns
t12
Standard Mode
-
300
ns
tFCL, Fall Time of SCL signal
Fast Mode
20 + 0.1CB 300
ns
High-Speed Mode, CB = 100pF max 10
40
ns
High-Speed Mode, CB = 400pF max 20
80
ns
tSP
4
Fast Mode
0
50
ns
Pulsewidth of Spike Suppressed.
High-Speed Mode
0
10
ns
tPOWER-UP
1
µs
Power-up Time
I
2C TIMING SPECIFICATIONS1(Continued.)
NOTES
1See Figure 1. Hs-Mode timing specification apply to the AD7992-1 only, Standard, Fast Mode Timing specifications apply to both the
AD7992-0 and AD7992-1. CB refers tothe capacitance load on the bus line.
2The SDA and SCL timing is measured with the input filters enabled. Switching off the input filters improves the transfer rate but has a nega-
tive effect on EMC behavior of the part.
4Input filtering on both the SCL and SDA inputs suppress noise spikes that are less than 50ns or 10ns for Fast Mode or High-Speed mode
respectivley.
Specifications subject to change without notice.




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