T5400SAW Components
Digital barometric pressure sensor
Preliminary data
4 April 25, 2013
Please read
cautions and warnings and
important notes
at the end of this document.
Operation modes
Resolution temperature
reading
— 0.01 —
K
Absolute accuracy
temperature sensor
3)
∆T –1.5 ± 0.5 +1.5 K T = 25°C
–2 ± 1+2K T = 0°C ... 70 °C
Solder drift
3)
–1 — +3 hPa after one week
1)
Ensured by design.
2)
Without interface activity.
3)
Specified during qualification. Given values are ± 3σ values for new parts; solder drift is shown separately.
4)
Relative accuracy over temperature at constant pressure in the range of 500 hPa ... 1100 hPa
Min. Typ. Max. Unit Note or condition
Power supply rejection
1)
— 1.4 — hPa
Normal operation
V
DD
= 1.7 V ... 3.6 V
— 8.7 — Pa
100 mV
P-P
, 217 Hz square
wave plus 100 mV random
noise in 10 MHz bandwidth
Start-up time t
S
——10ms
Delay between power on and
first serial communication
Wake-up time t
WU
— 2 2.5 ms
Wake up time from idle mode
to start of first measurement
1)
Ensured by design.
typ. RMS
noise
1)
(Pa)
1)
The noise data is derived from the standard deviation of ten successive samples.
typ. RMS
noise (m)
Avg. current
@ 1SPS
2)
(µA)
2)
Samples per second, typical conversion times, including wake-up phase.
Typ. Conver-
sion time (ms)
3)
3)
excluding wake-up time.
Max. Conver-
sion time (ms)
3)
Temperature 1.6 1.4 2
Low 5.1 0.42 2.6 1.4 2
Standard 3.5 0.29 7.2 7.3 8
High 3.2 0.27 13.3 15.2 16
Ultra high
4)
4)
Requires the average of two temperature measurements: one before and one after the pressure measure-
ment.
2.7 0.22 51.3 63.8 66
Min. Typ. Max. Unit Note or condition
