LM3S8971 Datasheet, PDF (540/577 Pages) List of Unclassifed Manufacturers – Microcontroller

Electrical Characteristics
23.2.4
23.2.5
Analog Comparator
Table 23-10. Analog Comparator Characteristics
Parameter Parameter Name
Min Nom Max Unit
V_OS Input offset voltage
- ±10 ±25 mV
V_CM Input common mode voltage range
0 - V_DD-1.5 V
C_MRR Common mode rejection ratio
50 -
- dB
T_RT Response time
--
T_MC Comparator mode change to Output Valid - -
1 µs
10 µs
Table 23-11. Analog Comparator Voltage Reference Characteristics
Parameter Parameter Name
Min Nom Max Unit
R_HR Resolution high range
- V_DD/32 - LSB
R_LR Resolution low range
- V_DD/24 - LSB
A_HR Absolute accuracy high range -
A_LR Absolute accuracy low range -
- ±1/2 LSB
- ±1/4 LSB
Ethernet Controller
Table 23-12. 100BASE-TX Transmitter Characteristics^a
Parameter Name
Min Nom Max Unit
Peak output amplitude
950 - 1050 mVpk
Output amplitude symmetry 0.98 - 1.02 mVpk
Output overshoot
-- 5%
Rise/Fall time
3 - 5 ns
Rise/Fall time imbalance
- - 500 ps
Duty cycle distortion
- - - ps
Jitter
- - 1.4 ns
a. Measured at the line side of the transformer.
Table 23-13. 100BASE-TX Transmitter Characteristics (informative)^a
Parameter Name
Min Nom Max Unit
Return loss
16 - - dB
Open-circuit inductance 350 - - µs
a. The specifications in this table are included for information only. They are mainly a function of the external transformer
and termination resistors used for measurements.
Table 23-14. 100BASE-TX Receiver Characteristics
Parameter Name
Min Nom Max Unit
Signal detect assertion threshold 600 700
mVppd
Signal detect de-assertion threshold 350 425 - mVppd
Differential input resistance
20 - - kΩ
Jitter tolerance (pk-pk)
4 - - ns
Baseline wander tracking
-75 - +75 %
540
October 01, 2007
Preliminary