DS1825U+ Maxim Integrated Products, DS1825U+ Datasheet - Page 2

• Manufacturer Part Number: DS1825U+
• Description: IC THERMOMETER DIGITAL 8-USOP
• Manufacturer: Maxim Integrated Products

Specifications of DS1825U+

• Function: Thermometer, Thermostat
• Topology: Register Bank, Scratchpad
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: Digital
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 3 V ~ 3.7 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Temperature Threshold: Programmable
• Full Temp Accuracy: +/- 0.5 C
• Digital Output - Bus Interface: 1-Wire
• Digital Output - Number Of Bits: 9 bit to 12 bit
• Supply Voltage (max): 3.7 V
• Supply Voltage (min): 3 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Supply Current: 1.5 mA
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 0.5°C
• Supply Voltage Range: 3V To 3.7V
• Resolution (bits): 12bit
• Sensor Case Style: µSOP
• No. Of Pins: 8
• Accuracy %: 0.5°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DESCRIPTION (cont.)
Each DS1825 has a unique 64-bit serial code, which allows multiple DS1825s to function on the same 1-Wire bus;
thus, it is simple to use one microprocessor to control many DS1825s distributed over a large area. In addition, the
4-bit location address can be used to identify specific temperature sensors in the system without requiring a wide
lookup table. Applications that can benefit from this feature include HVAC environmental controls, temperature
monitoring systems inside buildings, equipment or machinery, and process monitoring and control systems.
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature Range
Storage Temperature Range
Solder Dip Temperature (10s)
Reflow Oven Temperature
These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
DC ELECTRICAL CHARACTERISTICS
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Supply Voltage
Pullup Supply Voltage
Thermometer Error
Programming
Resistor: AD0-AD3
DQ Input Logic Low
DQ Input Logic High
Sink Current
Standby Current
Active Current
DQ Input Current
Drift
All voltages are referenced to ground.
The Pullup Supply Voltage specification assumes that the pullup device is ideal, and therefore the high level of the pullup is equal to V
In order to meet the V
across the transistor when it is turned on; thus: V
See typical performance curve in Figure 18
Logic low voltages are specified at a sink current of 4mA.
To guarantee a presence pulse under low voltage parasite power conditions, V
Logic high voltages are specified at a source current of 1mA.
Standby current specified up to 70°C. Standby current typically is 3mA at 125°C.
To minimize I
Active current refers to supply current during active temperature conversions or EEPROM writes.
DQ line is high (“hi-Z” state).
Drift data is based on a 1000 hour stress test at 125°C.
Inputs AD0-AD3 must be tied either High or Low. A "Low" is a connection to the GND terminal. A "High" connection varies with usage of
the DS1825. When connected as a parasite powered sensor, a connection to DQ is considered a High. When powered through the V
pin, a connection to V
Figures 20 and 21 for details. When optional programming resistors are used, their maximum values are 10,000W.
PARAMETER
DDS
, DQ should be within the following ranges: GND £ DQ £ GND + 0.3V or V
IH
DD
spec of the DS1825, the actual supply rail for the strong pullup transistor must include margin for the voltage drop
is a High. If left floating, the input values are indeterminate and may be either logical "0" or logical "1." See
SYMBOL
V
V
R
V
t
I
V
IH(DQ)
IL(DQ)
I
I
ERR
DDS
PGM
DQ
I
DD
DD
PU
L
-55°C to +125°C
Parasite Power
-10°C to +85°C
Parasite Power
CONDITION
Local Power
Local Power
Local Power
V
V
PU_ACTUAL
I/O
DD
= 0.4V
= 3.7V
= V
-0.5V to +6.0V
-55
-55
+260
+220
PU_IDEAL
2 of 21
°
°
C to +125°C
C to +125
°
°
C
C
+ V
+3.0
+3.0
+3.0
+2.2
+3.0
MIN
-0.3
4.0
0
TRANSISTOR
(-55°C to +125°C; V
°
C
ILMAX
TYP
0.65
±0.2
500
.
5
may have to be reduced to as low as 0.5V.
DD
The lower of
V
- 0.3V £ DQ £ V
DD
MAX
1000
+3.7
+3.7
±0.5
+0.7
V
3.7
1.5
±2
10
or
+ 0.3
DD
DD
DD
= 3.0V to 3.7V)
.
UNITS
mA
mA
kW
µA
°C
°C
nA
°C
V
V
V
V
NOTES
1, 4, 5
1, 2
1, 6
7, 8
12
10
11
1
3
1
9
PU
DD
.