FXTH870xD
Sensors
160
Freescale Semiconductor, Inc.
17.12
LFR Characteristics
2.3
V
DD
3.6, -20 °C
T
A
85 °C, unless otherwise specified.
Note:
Refer to
page 167
for description of notes.
17.13
LFR Power Consumption
2.3
V
DD
3.6, -20 °C
T
A
85 °C, unless otherwise specified. All parameters based upon DEQEN = 0 setting.
Note:
Refer to
page 167
for description of notes.
#
Characteristic
Symbol
Min
Typ
Max
Units
1200
LF Input Signal Characteristics
Relative to High Sensitivity Data Mode Always Detect, S
PER_H
Dynamic Range, DEQEN = 0
V
IN
56
—
—
dB
1201
1202
1203
LFR Input Signal Characteristics
(Manchester Data Mode)
Modulation Depth (Data 1 - Data 0)/Data 1
Data bit time
Bit Duty Cycle
M
R
t
DATA
M
DC
70
248
45
—
256
—
100
264
55
%
sec
%
1204
1205
LFR Differential Input (LFA to LFB,
Figure 122
)
Differential Resistance
Differential Capacitance (C
3
)
R
LFDF
C
LFDF
1
2
—
3.8
4
6
M
pF
1206
1207
1208
1209
LFR Carrier Frequency Range
VALEN = 1, LFCDTM = 256
sec
Always accepted carrier
Always rejected carrier, low band limit
Always rejected carrier, high band limit
VALEN = 0, LFCDTM = 256 ms
High Cutoff Freq, 5 mV p-p input, SENS[1:0] = 00
f
LFC
f
LFC
f
LFC
f
LFC
121.25
—
210
—
—
—
—
350
128.75
80
—
—
kHz
kHz
kHz
kHz
1210
LFR Detector Power Up Settling Time (2 LFO cycles)
t
PU
1.4
2.0
2.6
ms
1211
1212
LFR Preamble Decoder Settling Time
Data Mode Only, LFCDTM plus t
DEC
LPSM = 0
LPSM = 1
t
DEC
t
DEC
—
—
—
—
200
400
sec
sec
#
Characteristic
Symbol
Min
Typ
Max
Units
1300
1301
1302
1303
1304
1305
LFR Supply Current, Carrier Detect Mode
Monitor for carrier with VALEN = 0, LPSM = 1
T
A
= 25 °C, 3.0 V V
DD
T
A
= -40 °C to 125 °C, 2.3 to 3.6 V V
DD
Frequency validation with
VALEN = 1, LPSM = 1 and CHK125 = 00
T
A
= 25 °C, 3.0 V V
DD
T
A
= -40 °C to 125 °C, 2.3 to 3.6 V V
DD
Frequency validation with
VALEN = 1, LPSM = 1 and CHK125 = 01
T
A
= 25 °C, 3.0 V V
DD
T
A
= -40 °C to 125 °C, 2.3 to 3.6 V V
DD
I
LFR
I
LFR
I
LFR
—
—
—
—
—
—
3.9
—
5.6
—
5.8
—
—
5.7
—
7.5
—
8.0
µA
µA
µA
1306
1307
LFR Supply Current, Manchester Data Mode
Decoding of data stream after carrier detected
T
A
= 25 °C, 3.0 V V
DD
T
A
= -40 °C to 125 °C, 2.3 to 3.6 V V
DD
I
LFR
—
—
11.8
—
—
13.5
µA
Summary of Contents for FXTH870 D Series
Page 86: ...FXTH870xD Sensors 84 Freescale Semiconductor Inc Figure 57 Data Flow For Measurements...
Page 171: ...FXTH870xD Sensors Freescale Semiconductor Inc 169 Figure 128 QFN Case Outline...
Page 172: ...FXTH870xD Sensors 170 Freescale Semiconductor Inc Figure 129 QFN Case Outline...
Page 173: ...FXTH870xD Sensors Freescale Semiconductor Inc 171...