Datasheet

AD7879/AD7889
Rev. C | Page 4 of 40
Parameter Min Typ Max Unit Test Conditions/Comments
POWER REQUIREMENTS
V
CC
1.6 2.6 3.6 V Specified performance.
I
CC
Digital inputs = 0 V or V
CC
.
Converting Mode 480 650 µA ADC on, PM = 10.
Static 406 µA
ADC and temperature sensor are off; the
reference and oscillator are on; PM = 01
or 11.
Shutdown Mode 0.5 6 µA PM = 00.
1
See the Terminology section.
2
Guaranteed by characterization; not production tested.
3
Sample tested at 25°C to ensure compliance.
SPI TIMING SPECIFICATIONS (AD7879/AD7889)
V
CC
= 1.6 V to 3.6 V, T
A
= −40°C to +85°C, unless otherwise noted. Sample tested at 25°C to ensure compliance. All input signals are
specified with t
R
= t
F
= 5 ns (10% to 90% of V
CC
) and timed from a voltage level of 1.4 V.
Table 2.
Parameter
1
Limit Unit Description
f
SCL
5 MHz max
t
1
5 ns min
CS falling edge to first SCL falling edge
t
2
20 ns min SCL high pulse width
t
3
20 ns min SCL low pulse width
t
4
15 ns min DIN setup time
t
5
15 ns min DIN hold time
t
6
20 ns max DOUT access time after SCL falling edge
t
7
16 ns max
CS rising edge to DOUT high impedance
t
8
15 ns min
SCL rising edge to CS high
1
Guaranteed by design; not production tested.
CS
SCL
DIN
DOUT
t
1
1
16
15
MSB
LSB
2 3
MSB
LSB
1 2
15
16
t
2
t
4
t
5
t
3
t
6
t
7
t
8
07667-002
Figure 2. Detailed SPI Timing Diagram