Rainbow Electronics DS1722 User Manual
Page 10
DS1722
10 of 13
ELECTRICAL CHARACTERISTICS: DIGITAL THERMOMETER
(-55
°°°°
C to +120
°°°°
C, 2.65V
≤≤≤≤
====V
DDA
≤≤≤≤
====5.5V)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
NOTES
-40
°
C to +85
°
C
±
2.0
Thermometer Error
T
ERR
-55
°
C to +120
°
C
±
3.0
°
C
8, 9
Resolution
8
12
bits
8-bit conversions
67.5
75
9-bit conversions
125
150
10-bit conversions
250
300
11-bit conversions
500
600
Conversion Time
t
CONVT
12-bit conversions
1000
1200
ms
AC ELECTRICAL CHARACTERISTICS: 3-WIRE INTERFACE
(-55
°
C to +120
°
C, 2.65V
≤
=V
DD
≤
=5.5V)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
NOTES
Data to SCLK Setup
t
DC
35
ns
5, 6
SCLK to Data Hold
t
CDH
35
ns
5, 6
SCLK to Data Valid
t
CDD
80
ns
5, 6, 7
SCLK Low Time
t
CL
100
ns
6
SCLK High Time
t
CH
100
ns
6
SCLK Frequency
t
CLK
DC
5.0
MHz
6
SCLK Rise and Fall
t
R
, t
F
200
ns
CE to SCLK Setup
t
CC
400
ns
6
SCLK to CE Hold
t
CCH
100
ns
6
CE Inactive Time
t
CWH
400
ns
6
CE to Output High Z
t
CDZ
40
ns
5, 6
SCLK to Output High Z
t
CCZ
40
ns
5, 6
TIMING DIAGRAM: 3-WIRE READ DATA TRANSFER Figure 9