AD7879 Analog Devices, AD7879 Datasheet - Page 5

• Manufacturer Part Number: AD7879
• Description: Low Voltage Controller for Touch Screens
• Manufacturer: Analog Devices

Specifications of AD7879

• Resolution (bits): 12bit
• # Chan: 6
• Sample Rate: 105kSPS
• Interface: I²C/Ser 2-Wire,Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: CSP,WLCSP

I
V
timed from a voltage level of 1.4 V.
Table 3.
Parameter
f
t
t
t
t
t
t
t
t
t
t
1
SCL
2
1
2
3
4
5
6
7
8
R
F
Guaranteed by design; not production tested.
C TIMING SPECIFICATIONS (AD7879-1/AD7889-1)
CC
= 1.6 V to 3.6 V, T
1
SDA
SCL
STOP START
t
8
A
Limit
400
0.6
1.3
0.6
100
300
0.6
0.6
1.3
300
300
= −40°C to +85°C, unless otherwise noted. Sample tested at 25°C to ensure compliance. All input signals are
t
t
1
2
Unit
kHz max
µs min
µs min
µs min
ns min
ns min
µs min
µs min
µs min
ns max
ns max
t
5
t
R
Figure 3. Detailed I
t
F
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
t
3
Rev. C | Page 5 of 40
t
4
2
C Timing Diagram
HD; DAT
SU; DAT
LOW
HIGH
START
HD; STA
SU; STO
SU; STA
t
7
t
1
BUF
AD7879/AD7889
t
6
STOP