AK8999A Datasheet, PDF (22/68 Pages) Asahi Kasei Microsystems – Pressure Sensor Control IC

CONFIDENTIAL
[AK8999A/AW/AD]
7.2.6.2) Sensitivity Temperature Drift Adjustment Circuit
VDD = 3, 3.3, 5V ± 10%, Ta = -40 to 105ºC, register default, unless otherwise note
Parameter Symbol
Conditions
Min. Typ. Max. Units Description
Measurement in test mode after offset voltage and span voltage adjustment
1^st order
DS1+ ESTP/N[8] = 0h
+2500
coeff.
ESTP/N[7:0] = 8Bh
ppm/C
Adj. range
DS1-
ESTP/N[8] = 1h
ESTP/N[7:0] = DEh
-4000
ppm/C
Adj. step DS stp
18
ppm/C
Note) Design reference value; no production test performed.
7.2.7) LPF, S/H & Buffer
VDD = 3, 3.3, 5V ± 10%, Ta = -40 to 105ºC, register default, unless otherwise note
Parameter
Symbol
Conditions
Min. Typ. Max. Units Description
Measurement in test mode after offset voltage and span voltage adjustment
LPF cufoff
Fc1
frequency
kHz
40
60
80
S/H&Buffer gain SHG
1.935 2.222 2.523 times
S/H&Buffer out
pre-adj. error
SHerr
mV
-65
65
BUF gain adj.
width
Bufg
times
1.000 1.111 1.222
Vbuf+ Load resistance
0.98
V
VOUT output
voltage range
9.5kΩ
Vbuf- (to VDD or VSS)
*VDD
0.02 V
*VDD
BUF feedback
resistor value
Rbuf
102
146
190 ^k
7.2.8) Level shift
VDD = 3, 3.3, 5V ± 10%, Ta = -40 to 105ºC, register default, unless otherwise note
Parameter Symbol
Conditions
Min. Typ. Max. Units Description
Measurement in test mode after offset voltage and span voltage adjustment
Output reference Vlv+ Max
1.00
V Note1)
Voltage
ELV[8] = 1h
*VDD
adj. width
ELV[7:0] = FFh
(Level shift)
Vlv- Min
0.00
V Note1)
ELV[8] = 0h
*VDD
ELV[7:0] = FFh
Vlstp
Adj. step
0.002
V
*VDD
Note1) It is limited from 0.02*VDD to 0.98*VDD by the VOUT output range (Vbuf+, Vbuf-).
MS1600-E-00
- 22 -
2014/05