AD7889 Analog Devices, AD7889 Datasheet - Page 4

• Manufacturer Part Number: AD7889
• Description: Low Voltage Controller for Touch Screens
• Manufacturer: Analog Devices

Specifications of AD7889

• 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

AD7879/AD7889
Parameter
POWER REQUIREMENTS
1
2
3
SPI TIMING SPECIFICATIONS (AD7879/AD7889)
V
specified with t
Table 2.
Parameter
f
t
t
t
t
t
t
t
t
1
SCL
1
2
3
4
5
6
7
8
See the Terminology section.
Guaranteed by characterization; not production tested.
Sample tested at 25°C to ensure compliance.
Guaranteed by design; not production tested.
CC
V
I
CC
CC
= 1.6 V to 3.6 V, T
Converting Mode
Static
Shutdown Mode
1
DOUT
SCL
DIN
R
CS
= t
F
= 5 ns (10% to 90% of V
A
Limit
5
5
20
20
15
15
20
16
15
= −40°C to +85°C, unless otherwise noted. Sample tested at 25°C to ensure compliance. All input signals are
t
1
t
4
MSB
t
t
1
2
5
Unit
MHz max
ns min
ns min
ns min
ns min
ns min
ns max
ns max
ns min
CC
2
) and timed from a voltage level of 1.4 V.
Min
1.6
t
3
3
Figure 2. Detailed SPI Timing Diagram
Description
CS falling edge to first SCL falling edge
SCL high pulse width
SCL low pulse width
DIN setup time
DIN hold time
DOUT access time after SCL falling edge
CS rising edge to DOUT high impedance
SCL rising edge to CS high
Typ
2.6
480
406
0.5
Rev. C | Page 4 of 40
Max
3.6
650
6
15
LSB
16
Unit
V
µA
µA
µA
MSB
1
t
6
Test Conditions/Comments
Specified performance.
Digital inputs = 0 V or V
ADC on, PM = 10.
ADC and temperature sensor are off; the
reference and oscillator are on; PM = 01
or 11.
PM = 00.
2
15
LSB
16
t
8
t
7
CC
.