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AD7997 Datenblatt(PDF) 7 Page - Analog Devices

Teilenummer AD7997
Bauteilbeschribung  8-Channel, 10- and 12-Bit ADCs with I2CCompatible
PDF  32 Pages
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Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7997 Datenblatt(HTML) 7 Page - Analog Devices

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AD7997/AD7998
Rev. 0 | Page 7 of 32
I2C TIMING SPECIFICATIONS
Guaranteed by initial characterization. All values measured with input filtering enabled. CB refers to capacitive load on the bus line. tr and
tf measured between 0.3 VDD and 0.7 VDD.
High speed mode timing specifications apply to the AD7997-1/AD7998-1 only. Standard and fast mode timing specifications apply to
both the AD7997-0/AD7998-0 and the AD7997-1/AD7998-1. See Figure 2. Unless otherwise noted, VDD = 2.7 V to 5.5 V; REFIN = 2.5 V;
TA =TMIN to TMAX.
Table 3.
AD7997/AD7998 Limit at TMIN, TMAX
Parameter
Conditions
Min
Max
Unit
Description
fSCL
Standard mode
100
kHz
Serial clock frequency
Fast mode
400
kHz
High speed mode
CB = 100 pF max
3.4
MHz
CB = 400 pF max
1.7
MHz
t1
Standard mode
4
µs
tHIGH, SCL high time
Fast mode
0.6
µs
High speed mode
CB = 100 pF max
60
ns
CB = 400 pF max
120
ns
t2
Standard mode
4.7
µs
tLOW, SCL low time
Fast mode
1.3
µs
High speed mode
CB = 100 pF max
160
ns
CB = 400 pF max
320
ns
t3
Standard mode
250
ns
tSU;DAT, data setup time
Fast mode
100
ns
High speed mode
10
ns
t41
Standard mode
0
3.45
µs
tHD;DAT, data hold time
Fast mode
0
0.9
µs
High speed mode
CB = 100 pF max
0
702
ns
CB = 400 pF max
0
150
ns
t5
Standard mode
4.7
µs
tSU;STA, setup time for a repeated start condition
Fast mode
0.6
µs
High speed mode
160
ns
t6
Standard mode
4
µs
tHD;STA, hold time (repeated) start condition
Fast mode
0.6
µs
High speed mode
160
ns
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 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 + 0.1 CB
300
ns
High speed mode
CB = 100 pF max
10
80
ns
CB = 400 pF max
20
160
ns



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