DS1722 Datasheet, PDF (10/13 Pages) Dallas Semiconductor – Digital Thermometer with SPI/3-Wire Interface

DS1722
ELECTRICAL CHARACTERISTICS: DIGITAL THERMOMETER
(-55°C to +120°C, 2.65V ≤=V_DDA ≤=5.5V)
PARAMETER
SYMBOL CONDITION MIN TYP MAX UNITS NOTES
Thermometer Error
T_ERR
-40°C to +85°C
±2.0 °C
8, 9
-55°C to +120°C
±3.0
Resolution
8
12 bits
Conversion Time
t_CONVT
8-bit conversions
9-bit conversions
67.5 75
ms
125 150
10-bit conversions
250 300
11-bit conversions
500 600
12-bit conversions
1000 1200
AC ELECTRICAL CHARACTERISTICS: 3-WIRE INTERFACE
PARAMETER
(-55°C to +120°C, 2.65V ≤=V_DD ≤=5.5V)
SYMBOL CONDITION MIN TYP MAX UNITS NOTES
Data to SCLK Setup
SCLK to Data Hold
SCLK to Data Valid
SCLK Low Time
SCLK High Time
SCLK Frequency
SCLK Rise and Fall
CE to SCLK Setup
SCLK to CE Hold
CE Inactive Time
CE to Output High Z
SCLK to Output High Z
t_DC
t_CDH
t_CDD
t_CL
t_CH
t_CLK
t_R, t_F
t_CC
t_CCH
t_CWH
t_CDZ
t_CCZ
35
ns
5, 6
35
ns
5, 6
80
ns 5, 6, 7
100
ns
6
100
ns
6
DC
5.0 MHz
6
200 ns
400
ns
6
100
ns
6
400
ns
6
40
ns
5, 6
40
ns
5, 6
TIMING DIAGRAM: 3-WIRE READ DATA TRANSFER Figure 9
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