Datasheet

1-Wire Digital Thermometer with
Sequence Detect and PIO
DS28EA00
Maxim Integrated 3
ELECTRICAL CHARACTERISTICS (continued)
(T
A
= -40°C to +85°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Standard speed 15 60
Presence-Detect High Time t
PDH
Overdrive speed 2 6
μs
Standard speed 1.125 8.1
Presence-Detect Fall Time
(Notes 3, 15)
t
FPD
Overdrive speed 0 1.3
μs
Standard speed 60 240
Presence-Detect Low Time t
PDL
Overdrive speed 8 24
μs
Standard speed 68.1 75
Presence-Detect Sample Time
(Notes 2, 16)
t
MSP
Overdrive speed 7.3 10
μs
IO PIN: 1-Wire WRITE
Standard speed 60 120
Write-Zero Low Time
(Notes 2, 17)
t
W0L
Overdrive speed 6 16
μs
Standard speed 5 15
Write-One Low Time
(Notes 2, 17)
t
W1L
Overdrive speed 1 2
μs
IO PIN: 1-Wire READ
Standard speed 5 15 - 
Read Low Time (Notes 2, 18) t
RL
Overdrive speed 1 2 - 
μs
Standard speed t
RL
+  15
Read Sample Time (Notes 2, 18) t
MSR
Overdrive speed t
RL
+  2
μs
PIO PINS
Input Low Voltage V
ILP
(Note 2) 0.3 V
Input High Voltage (Note 2) V
IHP
V
X
= Max(V
PUP
, V
DD
) V
X
- 1.6 V
Input Load Current (Note 19) I
LP
Pin at GND -1.1 μA
Output Low Voltage (Note 11) V
OLP
At 4mA 0.4 V
Chain-On Pullup Impedance R
CO
(Note 3) 20 40 60 k
EEPROM
Programming Current I
PROG
(Notes 3, 20) 1.5 mA
Programming Time t
PROG
(Note 21) 10 ms
At +25°C 200,000
Write/Erase Cycles (Endurance)
(Notes 22, 23)
N
CY
-40°C to +85°C 50,000
—
Data Retention (Notes 24, 25) t
DR
At +85°C (worst case) 10 Years
TEMPERATURE CONVERTER
Conversion Current I
CONV
(Notes 3, 20) 1.5 mA
12-bit resolution (1/16°C) 750
11-bit resolution (1/8°C) 375
10-bit resolution (1/4°C) 187.5
Conversion Time (Note 26) t
CONV
9-bit resolution (1/2°C) 93.75
ms
-10°C to +85°C -0.5 +0.5
Conversion Error 
Below -10°C (Note 3) -0.5 +2.0
°C
Converter Drift 
D
(Note 27) -0.2 +0.2 °C