AD7148 Analog Devices, AD7148 Datasheet - Page 5

• Manufacturer Part Number: AD7148
• Manufacturer: Analog Devices

Specifications of AD7148

• Resolution (bits): 16bit
• # Chan: 8
• Sample Rate: 250kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: ± 8 pF (Delta C)
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

I
T
All input signals timed from a voltage level of 1.6 V.
Table 4.
Parameter
f
t
t
t
t
t
t
t
t
t
t
1
I
SCLK
2
2
1
2
3
4
5
6
7
8
R
F
Guaranteed by design, not production tested.
A
C Timing Diagram
C TIMING SPECIFICATIONS (AD7148-1)
= −40°C to +85°C, V
1
SCLK
SDA
Limit
400
0.6
1.3
0.6
100
300
0.6
0.6
1.3
300
300
STOP START
t
DRIVE
8
= 1.65 V to 3.6 V, V
t
1
t
2
t
5
t
R
CC
kHz max
Unit
μs min
μs min
μs min
ns min
ns min
μs min
μs min
μs min
ns max
ns max
= 2.6 V to 3.6 V, unless otherwise noted. Sample tested at 25°C to ensure compliance.
Figure 2. I
t
F
t
3
Rev. A | Page 5 of 56
2
C Detailed Timing Diagram
t
4
Description
Start condition hold time, t
Clock low period, t
Clock high period, t
Data setup time, t
Data hold time, t
Stop condition setup time, t
Start condition setup time, t
Bus free time between stop and start conditions, t
Clock/data rise time
Clock/data fall time
START
HD; DAT
SU; DAT
t
7
LOW
HIGH
t
1
HD; STA
SU; STO
SU; STA
t
6
BUF
STOP
AD7148