AD7997 Analog Devices, AD7997 Datasheet - Page 7

• Manufacturer Part Number: AD7997
• Description: 8-Channel, 10-Bit ADC with I2C Compatible Interface in 20-Lead TSSOP
• Manufacturer: Analog Devices

Specifications of AD7997

• Resolution (bits): 10bit
• # Chan: 8
• Sample Rate: 79kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: SOP

I
Guaranteed by initial characterization. All values measured with input filtering enabled. C
t
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, V
T
Table 3.
Parameter
f
t
t
t
t
t
t
t
t
t
f
SCL
1
2
3
4
5
6
7
8
9
2
A
1
measured between 0.3 VDD and 0.7 VDD.
C TIMING SPECIFICATIONS
=T
MIN
to T
MAX
Conditions
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
C
C
C
C
C
C
C
C
C
C
.
B
B
B
B
B
B
B
B
B
B
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
Min
4
0.6
60
120
4.7
1.3
160
320
100
10
0
0
4.7
0.6
160
4
0.6
160
4.7
1.3
4
0.6
160
10
20
250
0
0
20 + 0.1 C
AD7997/AD7998 Limit at T
B
Max
100
400
3.4
1.7
3.45
0.9
70
150
1000
300
80
160
2
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Unit
kHz
kHz
MHz
MHz
µs
µs
ns
ns
µs
µs
ns
ns
ns
ns
ns
µs
µs
ns
ns
µs
µs
ns
µs
µs
ns
µs
µs
µs
µs
ns
ns
ns
ns
ns
MIN
, T
MAX
Description
Serial clock frequency
t
t
t
t
t
t
t
t
t
HIGH
LOW
SU;DAT
HD;DAT
SU;STA
HD;STA
BUF
SU;STO
RDA
, bus free time between a stop and a start condition
, rise time of SDA signal
, SCL low time
, SCL high time
, setup time for a repeated start condition
, setup time for stop condition
B
, data setup time
, hold time (repeated) start condition
, data hold time
refers to capacitive load on the bus line. t
DD
= 2.7 V to 5.5 V; REF
AD7997/AD7998
IN
= 2.5 V;
r
and