AD7994 Analog Devices, AD7994 Datasheet - Page 8

• Manufacturer Part Number: AD7994
• Description: 4 Channel, 12-Bit ADC with I2C Compatible Interface in 16-Lead TSSOP
• Manufacturer: Analog Devices

Specifications of AD7994

• Resolution (bits): 12bit
• # Chan: 4
• Sample Rate: 188kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: SOP

AD7993/AD7994
Parameter
t
t
t
t
t
t
1
2
10
11
11A
12
SP
POWER-UP
A device must provide a data hold time for SDA in order to bridge the undefined region of the SCL falling edge.
For 3 V supplies, the maximum hold time with
2
SDA
SCL
S = START CONDITION
P = STOP CONDITION
P
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
Fast mode
High speed mode
t
7
C
C
C
C
C
C
C
C
B
B
B
B
B
B
B
B
S
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
t
6
t
2
t
11
t
4
C
B
= 100 pF max is 100 ns max.
Min
20 + 0.1 C
10
20
20 + 0.1 C
10
20
20 + 0.1 C
10
20
20 + 0.1 C
10
20
0
0
1
Figure 2. Two-Wire Serial Interface Timing Diagram
t
1
t
12
B
B
B
B
AD7993/AD7994
Limit at T
t
3
Rev. 0 | Page 8 of 32
Max
300
300
80
160
1000
300
40
80
1000
300
80
160
300
300
40
80
50
10
MIN
, T
MAX
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
typ µs
S
t
5
t
10
t
6
Description
t
t
t
condition and after an acknowledge bit
t
Pulse width of suppressed spike
Power-up time
FDA
RCL
RCL1
FCL
, rise time of SCL signal
, fall time of SCL signal
, fall time of SDA signal
, rise time of SCL signal after a repeated start
t
8
P
t
9