DS1825 Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID
 
3 of 21
 
 
AC ELECTRICAL CHARACTERISTICS: NV MEMORY
(-55癈 to +100癈; V
DD
= 3.0V to 3.7V)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
NV Write Cycle Time
t
wr
 
 
 
2
10
ms
EEPROM Writes
N
EEWR
 
-55癈 to +55癈
50k
 
 
writes
EEPROM Data Retention
t
EEDR
 
-55癈 to +55癈
10
 
 
years
 
AC ELECTRICAL CHARACTERISTICS (-55?/SPAN>C to +125?/SPAN>C; V
DD
= 3.0V to 3.7V) 
PARAMETER
SYMBOL
CONDITION
MIN     TYP     MAX     UNITS     NOTES
9-bit resolution
 
 
93.75
ms
1
10-bit resolution
 
 
187.5
ms
1
11-bit resolution
 
 
375
ms
1
Temperature Conversion
Time
t
CONV
 
12-bit resolution
 
 
750
ms
1
Time to Strong Pullup On
t
SPON
 
Start Convert T
Command Issued
 
 
10
 
Time Slot
t
SLOT
 
 
60
 
120
1
Recovery Time
t
REC
 
 
1
 
 
1
Write 0 Low Time
t
LOW0
 
 
60
 
120
1
Write 1 Low Time
t
LOW1
 
 
1
 
15
1
Read Data Valid
t
RDV
 
 
 
 
15
1
Reset Time High
t
RSTH
 
 
480
 
 
1
Reset Time Low
t
RSTL
 
 
480
 
 
1, 2
Presence Detect High
t
PDHIGH
 
 
15
 
60
1
Presence Detect Low
t
PDLOW
 
 
60
 
240
1
Capacitance: DQ
C
IN/OUT
 
 
 
 
25
pF
 
Capacitance: AD0-AD3
C
IN_AD
 
 
 
 
50
pF
 
NOTES:    
1.
Refer to timing diagrams in Figure 18.
2.
Under parasite power, if t
RSTL
 > 960ms, a power on reset may occur.
 
Table 1. DETAILED PIN DESCRIPTIONS
PIN
SYMBOL
DESCRIPTION
4
GND
Ground.
2
DQ
Data Input/Output pin. Open-drain 1-Wire interface pin. Also 
provides power to the device when used in parasite power mode
(see Parasite Power section.)
1
V
DD
 
Optional V
DD
 pin. V
DD
 must be grounded for operation in parasite
power mode.
5
AD0
Location Address Input Pin LSB
6
AD1
Location Address Input Pin
7
AD2
Location Address Input Pin
8
AD3
Location Address Input Pin MSB
3
N.C.
No Connection
 
 
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