Texas Instruments TRIS TMS37122 User Manual

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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
57µA
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
23.5µA
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

Texas Instruments TRIS TMS37122 Specifications

General

Brand	Texas Instruments
Model	TRIS TMS37122
Category	Computer Hardware
Language	English