H28 Datasheet, PDF (4/11 Pages) –

ELECTRICAL CHARACTERISTICS
TA = -20^oC to +60^oC, Typ TA = 25^oC, VDD = 2.35 V, Rsensor = 4.5k: unless otherwise noted
Parameter
Symbol
Conditions
Min
Resolution
Accuracy
Intergral Nonlinearity
ISR = 405 mV
ISR =105 mV
ISRLIN =324 mV, OSR = 512
ISRLIN = 84 mV, OSR = 512
INL
Differential Nonlinearity
DNL
ENOB
(Effective Number of Bits)
External Clock Signal
MCLK
ISRLIN = 324 mV
OSR=512
OSR=256
OSR=128
OSR=64
30000
Delay Between End of
Conversion and ADC
Result Read-Out
Duty Cycle of MCLK
Serial Data Clock
tD E L
MCLK = 32768 Hz
0.1
DUTYC
SCL
Master Clock Division Enabled
XENMCLKDIV=0
Master Clock Division Disabled
XENMCLKDIV=1
60/40
TBD
Input Signal Conversion
ISR
ISCR = 1 (Water sensor)
Range
ISCR = 0 (Air sensor)
Linear Input Signal
ISRLIN
ISCR = 1 (Water sensor)
Conversion Range
ISCR = 0 (Air sensor)
Output Code Values
0
Temperature Measurement
R1
Resistors
R2
R3
Temperature Measurement
TRCR
Resistors Temp Coefficient
Note: ISCR refer to the I²C serial interface control bits, see table 1 on page 5. TBD= To Be Defined
-10%
-400
Typ
16
6.1
1.6
19.7
5.1
4
3
14
13
12
10
32768
50/50
405
105
324
84
7710
17000
3073
17000
-350
Max
35000
40/60
TBD
500
65408
+10%
-300
Unit
Bit
µV
µV
LSB
LSB
Bit
Hz
ms
%
kHz
mV
mV
:
ppm /
º_C