DS1629S/T&R Maxim Integrated Products, DS1629S/T&R Datasheet - Page 21

• Manufacturer Part Number: DS1629S/T&R
• Description: IC THERM/RTC/CALENDAR DIG 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of DS1629S/T&R

• Function: Thermometer, Thermostat
• Topology: ADC, Comparator, Oscillator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Full Temp Accuracy: +/- 2 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 9 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DC ELECTRICAL CHARACTERISTICS:
DIGITAL THERMOMETER
AC ELECTRICAL CHARACTERISTICS:
2-WIRE INTERFACE
NOTES:
1.
2.
3.
4.
5.
6.
7.
PARAMETER
DS1629 Thermometer
Error
Resolution
Conversion Time
PARAMETER
SCL Clock Period
Data In Setup Time to
SCL High
Data Out Stable after
SCL Low
SDA Low Setup
Time to SCL
Low (START)
SDA High Hold
Time After SCL
High (STOP)
Capacitance Load for
each Bus Line
Input Capacitance
Crystal Capacitance
All voltages are referenced to ground, unless otherwise noted.
Logic 0 voltage specified at a sink current of 4mA at V
I/O pins of fast mode devices must not obstruct the SDA and SCL lines if V
Standby current specified with temperature conversions and clock oscillator/buffer shut down,
ALRM pin open, and SDA, SCL = V
I
See typical accuracy curve for specification limits outside the temperature range indicated.
Thermometer error is specified for 2.7V £ V
0.5°C if ALRM is sinking the maximum current.
Thermometer resolution (in °C) = 1/COUNT_PER_C(T). The calibration algorithm is such that
COUNT_PER_C and thus resolution varies over temperature (but is constant at a given
temperature for a given device) and from device to device.
DDX
specified with ALRM pin open, and 0°C to +70°C.
SYMBOL
SYMBOL
t
CONVT
T
C
C
C
ERR
t
t
t
t
t
1
2
3
4
5
C
b
I
CONDITION
CONDITION
2.7V £ V
-10°C to
£ 5.5V
+85°C
DD
, 0°C to +70°C.
21 of 22
DD
DD
(-55°C to +125°C; 2.7V £ V
(-55°C to +125°C; 2.2V £ V
£ 5.5V. Accuracy will degrade approximately
MIN
MIN
0.03
100
100
100
2.5
0
DD
= 5.0V and 1.5mA at V
TYP
TYP
12.5
400
5
MAX
MAX
1000
±2.0
400
0.5
DD
is switched off.
UNITS
UNITS
ms
°C
°C
pF
pF
pF
µs
ns
ns
ns
ns
DD
=2.2V.
DD
DD
£ 5.5V)
£ 5.5V)
NOTES
NOTES
6
7
8
9