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AD7291 Datasheet(PDF) 4 Page - Analog Devices

Part # AD7291
Description  8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
PDF  21 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7291 Datasheet(HTML) 4 Page - Analog Devices

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AD7291
Preliminary Technical Data
Rev. PrC | Page 4 of 21
I2C TIMING SPECIFICATIONS
t6
t7
t2
t11
t4
t1
t12
t10
t5
t9
t6
t3
t8
SCL
S
SDA
S = START CONDITION
P = STOP CONDITION
P
P
S
Figure 2. 2-Wire Serial Interface Timing Diagram
All values were measured with the input filtering enabled. CB refers to the capacitive load on the bus line, with tr and tf measured between
0.3 VDRIVE and 0.7 VDRIVE (see Figure 2) Unless otherwise noted, VDD = 2.8V to 3.6V; VDRIVE = 1.65 V to 3.6 V; VREF = 2.5 V internal/external;
TA = −40°C to + 125°C, unless otherwise noted.
Table 3.
Limit at t
MIN, tMAX
Parameter
Conditions
Min
Typ
Max
Unit
Description
fSCL
Standard mode
100
kHz
Serial clock frequency
Fast mode
400
kHz
t1
Standard mode
4
µs
tHIGH, SCL high time
Fast mode
0.6
µs
t2
Standard mode
4.7
µs
tLOW, SCL low time
Fast mode
1.3
µs
t3
Standard mode
250
ns
tSU;DAT, data setup time
Fast mode
100
ns
t41
Standard mode
0
3.45
µs
tHD;DAT, data hold time
Fast mode
0
0.9
µs
t5
Standard mode
4.7
µs
tSU;STA, setup time for a repeated start condition
Fast mode
0.6
µs
t6
Standard mode
4
µs
tHD;STA, hold time for a repeated start condition
Fast mode
0.6
µs
t7
Standard mode
4.7
µs
tBUF, bus-free time between a stop and a start condition
Fast mode
1.3
µs
t8
Standard mode
4
µs
tSU;STO, setup time for a stop condition
Fast mode
0.6
µs
t9
Standard mode
1000
ns
tRDA, rise time of the SDA signal
Fast mode
20 + 0.1 CB
300
ns
t10
Standard mode
300
ns
tFDA, fall time of the SDA signal
Fast mode
20 + 0.1 CB
300
ns
t11
Standard mode
1000
ns
tRCL, rise time of the SCL signal
Fast mode
20 + 0.1 CB
300
ns
t11A
Standard mode
1000
ns
tRCL1, rise time of the SCL signal after a repeated
Fast mode
20 + 0.1 CB
300
ns
start condition and after an acknowledge bit
t12
Standard mode
300
ns
tFCL, fall time of the SCL signal
Fast mode
20 + 0.1 CB
300
ns
tSP
Fast mode
0
50
ns
Pulse width of the suppressed spike
tPOWER-UP
0.6
µs
Power-up and acquisition time
1 A device must provide a data hold time for SDA in order to bridge the undefined region of the SCL falling edge.



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