Rainbow Electronics DS1722 - 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