Texas Instruments DS125RT410, Руководство пользователя

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DS125RT410
www.ti.com SNLS459 – APRIL 2011
Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges with default register settings unless otherwise specified.
(1)
Symbol Parameter Conditions Min Typ Max Units
RECEIVER INPUTS (RXPn, RXNn)
V
TX2, min
Minimum Source Transmit Launch
(5)
600 mV
P-P
Signal Level (IN, diff)
V
TX2, max
Maximum Source Transmit Launch
(5)
1000 mV
P-P
Signal Level (IN, diff)
V
TX1, max
Maximum Source Transmit Launch
(6)
1200 mV
P-P
Signal Level (IN, diff)
V
TX0, max
Maximum Source Transmit Launch
(7)
1600 mV
P-P
Signal Level (IN, diff)
L
RI
Maximum Differential Input Return 100 MHz – 6 GHz
-15 dB
Loss - |SDD11|
Z
D
Differential Input Impedance 100 MHz – 6 GHz 100 Ω
Z
S
Single-Ended Input Impedance 100 MHz – 6 GHz 50 Ω
DRIVER OUTPUTS (TXPn, TXNn)
V
OD0
Differential output voltage Differential measurement with
OUT+ and OUT- terminated by
50
Ω to GND, AC-Coupled,
SMBus register VOD control
400 675 mV
P-P
(Register 0x2d bits 2:0) set to 0,
minimum VOD
De-emphasis control set to
minimum (0 dB)
V
OD7
Differential output voltage Differential measurement with
OUT+ and OUT- terminated by
50
Ω to GND, AC-Coupled
SMBus register VOD control
1000 mV
P-P
(Register 0x2d bits 2:0) set to 7,
maximum VOD
De-emphasis control set to
minimum (0 dB)
V
OD_DE
De-emphasis level Differential measurement with
(8)
OUT+ and OUT- terminated by
50
Ω to GND, AC-Coupled
Set by SMBus register control to
-15 dB
maximum de-emphasis setting
Relative to the nominal 0 dB de-
emphasis level set at the minimum
de-emphasis setting
t
R
, t
F
Transition time (rise and fall Transition time control = Full Slew
39 ps
times)
(8) (9)
Rate
Transition time control = Limited
50 ps
Slew Rate
L
RO
Maximum Differential Output 100 MHz – 6 GHz
(10)
-15 dB
Return Loss - |SDD22|
t
DP
Propagation Delay Retimed data 300 ps
T
DE
De-emphasis pulse duration
(11)
Measured at V
OD
= 1000 mV
P-P
,
75 ps
de-emphasis setting = -12 dB
TJ Output total jitter Measured at BER = 10
-12 (12)
10 ps
(5) Differential signal amplitude at the transmitter output providing < 1x10
-12
bit error rate. Measured at 10.3125 Gbps with a PRBS-31 data
pattern. Input transmission channel is 40-inch long FR-4 stripline, 4-mil trace width.
(6) Differential signal amplitude at the transmitter output providing < 1x10
-12
bit error rate. Measured at 10.3125 Gbps with a PRBS-31 data
pattern. Input transmission channel is 30-inch long FR-4 stripline, 4-mil trace width.
(7) Differential signal amplitude at the transmitter output providing < 1x10
-12
bit error rate. Measured at 10.3125 Gbps with a PRBS-31 data
pattern. No input transmission channel.
(8) Measured with clock-like {11111 00000} pattern.
(9) Slew rate is controlled by SMBus register settings.
(10) Measured with 10 MHz clock pattern output.
(11) De-emphasis pulse width varies with V
OD
and de-emphasis settings.
(12) Typical with no output de-emphasis, minimum output transmission channel.
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