DS1722 Datasheet, PDF (11/14 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
-55°C to +120°C
±3.0
Resolution
8
12 bits
Conversion Time
t_CONVT 8-bit conversions
67.5 75 ms
9-bit conversions
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
t_DC
SCLK to Data Hold
t_CDH
SCLK to Data Valid
t_CDD
SCLK Low Time
t_CL
SCLK High Time
t_CH
SCLK Frequency
t_CLK
SCLK Rise and Fall
t_R, t_F
CE to SCLK Setup
t_CC
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
SCLK to CE Hold
t_CCH
CE Inactive Time
t_CWH
CE to Output High Z
t_CDZ
SCLK to Output High Z
t_CCZ
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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