參數(shù)資料
型號(hào): TMS37122
廠商: Texas Instruments, Inc.
英文描述: TIRIS Automotive Devices Analog Front End IC TMS37122
中文描述: 提里斯汽車設(shè)備的模擬前端集成電路TMS37122
文件頁數(shù): 66/73頁
文件大?。?/td> 1189K
代理商: TMS37122
66
Analog Front End IC TMS37122 - Reference Guide
August ’01
4.2.4.10 Supply and Reference Currents
4.2.4.11 Wake Detector
For Wake Detector measurements the 3D-AFE should be configured to work without Wake
Pattern Detection. The circuit is supplied by a variable power supply at VBAT (VBAT = 2…4
V) and fed by a Signal Generator between RF1 (RF2, RF3) and VCL (see Figure 33). The
unused RF inputs are connected to VCL.
The sine wave output of the Signal Generator can be switched on and off and the amplitude
also be continuously varied. As well as this, the amplitude can be modulated according to
specification using a Modulation Generator.
The currents are measured via a measurement resistor using a Differential Probe.
The different states of the 3D-AFE are reached by push button activation at WDEEN.
Parameter
Sign
Note
Min
Nom
Max
Unit
Quiescent Current
Iquiet
VBAT = 4 V
WDEEN = 0 V
100
nA
Stand-by current,
3 Antennas
Istby
VBAT = 4 V
WDEEN = 4V
5
7
μA
Stand-by current,
2 Antennas
Istby
VBAT = 4 V
WDEEN = 4V
3.5
5
μA
Stand-by current,
1 Antenna
Istby
VBAT=4V,
WDEEN=4V
2
3.5
μA
Initialization Current
Iinit
VBAT = 4 V
WAKE = 0 V
WDEEN = 4V
10
μA
Active Current
Iact
VBAT = 4 V
WAKE = 4 V
WDEEN = 4V
20
30
μA
Quiescent Current, VCL
IVCL
VCL= 5 V
0.2
2
4
μA
Supply Current during
LF Transmission
IVCL
VCL = 5 V,
Q = 10
110
μA
DC Input Current
IHF
VRF = 5 V
VBAT = 0…4 V
20
nA
DC Input Current
IHF
VRF = 10V
VBAT = 0…4 V
100
nA
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