參數(shù)資料
型號(hào)： PPXY8300A6T1
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： Pressure Sensor
英文描述： DIFFERENTIAL, PEIZORESISTIVE PRESSURE SENSOR, RECTANGULAR, SURFACE MOUNT
封裝： SOIC-20
文件頁數(shù)： 61/162頁
文件大小： 4316K
代理商： PPXY8300A6T1
MPXY8300 Series
Sensors
Freescale Semiconductor
153
17.17 LFR Characteristics
2.1
≤ VDD ≤ 3.6, TL ≤ TA ≤ TH, unless otherwise specified.
#
V
Characteristic
Symbol
Min
Typ
Max
Units
222
223
224
225
P
LFR Input Sensitivity, Low Sensitivity
Detect level, PTA0:1
No Detect level, PTA0:1
LFR Input Detect Sensitivity, High Sensitivity
Detect level, PTA0:1
No Detect level, PTA0:1
SDET
SNODET
SDET
SNODET
—
4
—
0.5
—
10
—
3.5
—
mV p-p
226
227
228
C
AGC Control (Manchester Data Mode, Figure 17-2)
Acquisition time for initial signal input
Gain adjustment step
Tracking delay for one gain adjustment step
tACQ
SAGC
tDELAY
—
+/-14
—
1.25
—
tDATA
μSec
%
-
229 C
LFR Modulation Depth (Manchester Data Mode)
(Data 1 - Data 0)/Data 1
MR
70
—
100
%
230 C
Maximum LFR Input (PTA0:1, Differential)
VLFIN
-0.3
—
2.3
V
231
232
233
234
C
LFR Input (Figure 17-3)
Common Mode Impedance (R1, R2)
Differential Impedance
Common-Mode Capacitance (C1, C2)
Differential Capacitance (C3)
RLFCM
RLFR
CLFR
CDLFR
0.5
1
—
10
M
Ω
M
Ω
pF
235
236
C
LFR Input Frequency
Lower cutoff frequency of discriminator
Upper cutoff frequency of discriminator
fCBPL
fCBPH
65
150
—
100
250
kHz
237
238
239
240
241
242
C
D
LFR Detector Sampling
Carrier Detect Mode On Time
LFON = 0 (25 cycles of MFO)
LFON = 1 (265 cycles of MFO)
Manchester Data Mode On Time
No signal detected
Signal detected, not acquired (2 MFO cycles)
Wakeup in middle of data frame
Series of Manchester zeros (168 data cycles)
tLFON
tTIMEOUT
—
45
200
2120
200
2
—
μSec
mSec
243
244
245
246
C
LFR Carrier Detect Time
LFCT = 0 (11 cycles of MFO)
Detect
No Detect
LFCT = 1 (22 cycles of MFO)
Detect
No Detect
tCD_DET
tCD_NODET
tCD_DET
tCD_NODET
94.2
—
188.4
—
81.8
—
163.6
μSec
247
248
249
250
251
252
253
C
LFR Decoder Timing (Manchester Encoded Mode)
Guaranteed Data rate (Always decoded)
Rejected Data rate (Never decoded)
Data bit time
Pulse width
Decoder extend time (cycles of MFO)
Preamble time
Time before synchronization
Maximum before LFR shutoff
Dr
tDATA
tPW
tLFDEC
tLFPRE
3.8
<2.0
238
—
2 tDATA
—
4.0
250
0.50 tDATA
284
—
4.2
>6.5
263
—
8 tDATA
180 tDATA
kbits/sec
μSec
-
cycles
-
254 C
LFR Mode Changeover Delay
tLFMODE
—
4.29
mSec
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