Datasheet
REV. A
–2–
AD7314–SPECIFICATIONS
*
(T
A
= T
MIN
to T
MAX
, V
DD
= 2.65 V to 5.5 V, unless otherwise noted.)
Parameter Min Typ Max Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC
Accuracy ± 2.0 ∞CT
A
= –35∞C to +85∞C. V
DD
= 2.65 V to 2.9 V
± 1.0 ∞CT
A
= –35∞C to +85∞C. V
DD
= 3 V to 5.5 V
Resolution 10 Bits
Update Rate, t
R
400 ms
Temperature Conversion Time 25 ms
SUPPLIES
Supply Voltage 2.65 5.5 V For Specified Performance
Supply Current
Normal Mode (Inactive) 250 300 mA Part Not Converting, V
DD
= 2.65 V to 2.9 V
275 mA Part Not Converting, V
DD
= 3 V to 5.5 V
Normal Mode (Active) 1 mA Part Converting, V
DD
= 2.65 V to 2.9 V
1.2 mA Part Converting, V
DD
= 3 V to 5.5 V
Shutdown Mode 1 mAV
DD
= 2.65 V to 2.9 V
1 mAV
DD
= 3 V to 5.5 V
Power Dissipation 860 mWV
DD
= 2.65 V. Using Normal Mode
(Auto Conversion)
Power Dissipation V
DD
= 2.65 V. Using Shutdown Mode
1 SPS 3 mW
10 SPS 3.3 mW
100 SPS 6 mW
DIGITAL INPUT
Input High Voltage, V
IH
1.85 V V
DD
= 2.65 V to 2.9 V
Input Low Voltage, V
IL
0.53 V V
DD
= 2.65 V to 2.9 V
Input High Voltage, V
IH
2.4 V V
DD
= 3 V to 5.5 V
Input Low Voltage, V
IL
0.8 V V
DD
= 3 V to 5.5 V
Input Current, I
IN
± 1 mAV
IN
= 0 V to V
DD
Input Capacitance, C
IN
10 pF All Digital Inputs
DIGITAL OUTPUT
Output High Voltage, V
OH
2.4 V I
SOURCE
= I
SINK
= 200 mA
Output Low Voltage, V
OL
0.4 V I
OL
= 200 mA
Output Capacitance, C
OUT
50 pF
*All specifications apply for –35∞C to +85∞C, unless otherwise noted.
Specifications subject to change without notice.
TIMING CHARACTERISTICS
1, 2
Parameter Limit Unit Comments
t
1
0 ns min CE to SCLK Setup Time
t
2
50 ns min SCLK High Pulse Width
t
3
50 ns min SCLK Low Pulse Width
t
4
4
35 ns max Data Access Time after SCLK Rising Edge
t
5
20 ns min Data Setup Time prior to SCLK Falling Edge
t
6
0 ns min Data Hold Time after SCLK Falling Edge
t
7
0 ns min CE to SCLK Hold Time
t
8
4
40 ns max CE to SDO High Impedance
NOTES
1
Guaranteed by design and characterization, not production tested.
2
All input signals are specified with tr = tf = 5 ns (10% to 90% of V
DD
) and are timed from a voltage level of 1.6 V.
3
All specifications apply for –35∞C to +85∞C, unless otherwise noted.
4
Measured with the load circuit of Figure 2.
Specifications subject to change without notice.
(T
A
3
= T
MIN
to T
MAX
, V
DD
= 2.65 V to 5.5 V, unless otherwise noted. See Figure 1.)