Datasheet

DS1720
13 of 14
AC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; V
DD
=2.7V to 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Temperature Conversion
Time
T
TC
750 ms
Data to CLK Setup t
DC
35 ns 5
CLK to Data Hold t
CDH
40 ns 5
CLK to Data Delay t
CDD
150 ns 5, 6, 7
CLK Low Time t
CL
285 ns 5
CLK High Time t
CH
285 ns 5
CLK Frequency t
CLK
DC 1.75 MHz 5
CLK Rise and Fall t
R,
t
F
500 ns
RST to CLK Setup
t
CC
100 ns 5
CLK to RST Hold
t
CCH
40 ns 5
RST Inactive Time
t
CWH
125 ns 5, 8
CLK High to I/O High-Z t
CDZ
50 ns 5
RST Low to I/O High-Z
t
RDZ
50 ns 5
Convert Pulse Width t
CNV
250 ns 500 ms 9
Input Capacitance C
I
5 pF
I/O Capacitance C
I/O
10 pF
EEPROM AC ELECTRICAL CHARACTERISTICS
(-55°C to +125°C; V
DD
=2.7V to 5.5V)
PARAMETER CONDITIONS MIN TYP MAX UNITS
EEPROM Write Cycle Time 10 ms
EEPROM Writes
-55°C to +55°C
50k Writes
EEPROM Data Retention
-55°C to +55°C
10 Years
NOTES:
1. All voltages are referenced to ground.
2. Logic one voltages are specified at a source current of 1 mA.
3. Logic zero voltages are specified at a sink current of 4 mA.
4. I
STBY
, I
CC
specified with DQ, CLK/ CONV = V
DD
, and RST = GND.
5. Measured at V
IH
= 2.0V or V
IL
= 0.6V.
6. Measured at V
OH
= 2.4V or V
OL
= 0.4V.
7. Load capacitance = 50 pF.
8. t
CWH
must be 10 ms minimum following any write command that involves the E
2
memory.
9. 250ns is the guaranteed minimum pulse width for a conversion to start; however, a smaller pulse
width may start a conversion.
10. Drift data is based on a 1000hr stress test at +125°C with V
DD = 5.5V.