Mechanical Parameters - Texas Instruments 2000 Series Reference Manual

Recommended Operating Conditions
Symbol
t_TX Transmit burst length for correct operation (see note below)
Delay time from beginning of data bit at RXDT being valid to positive slope
t_dtck
of RXCK signal
t_dtvd Time for data bit of RXDT signal being valid after positive slope of RXCK
t_ckhi Time for clock signal RXCK being high
t_ri
Necessary rise and fall times for input signal TXCT- and TXCT-R
t_fi
t_ro
Rise and fall time of output signals RXDT and RXCK
t_fo
t_ro_R Rise time of output signal RXSS- (no external connection)
t_fo Fall time of output signal RXSS-
Propagation delay time from positive slope of TXCT- to positive slope of
tss_01Tl
RXSS- signal (maximum sensitivity)
Propagation delay time from negative slope of TXCT- to negative slope of
tss_10Tr
RXSS- signal (minimum sensitivity)
Maximum time of short circuit between antenna terminals ANT1 and ANT2
t_short
and short circuit of ANT1 or ANT2 to GNDA
Note: Due to transponder parameters a minimum charge-up time of 15 ms is necessary.
Decreasing charge-up time decreases read range by sending less energy to the
transponder.
The parameter t_short refers to a static short circuit of the antenna terminals.
Shorting the antenna terminals during operation may cause permanent damage
to the RFM.
Note: The heatsink is connected to the antenna resonator ground GNDA. When connecting the
heatsink to a housing, the heatsink must be insulated from the housing.
18 Specifications
Table 2-3. Timing Characteristics
Parameter
CAUTION
Table 2-4. Mechanical Parameters
Parameter
Height including mounting bolts
Weight approx.
Min Typ
15 50
20
90
55
500 1000
50 100
Typical Unit
44.0 ± 1.5
mm
251 g
SCBU022 – November 2002
Submit Documentation Feedback
www.ti.com
Max Unit
100 ms
µs
µs
µs
µs
1
µs
1
µs
1
µs
1
µs
1500
µs
200
10 s