DS80PCI810 Datasheet, PDF (9/60 Pages) Texas Instruments – Low-Power 8 Gbps 8-Channel Linear Repeater

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DS80PCI810
SNLS493A – OCTOBER 2014 – REVISED JANUARY 2015
Electrical Characteristics (continued)
PARAMETER
CML RECEIVER INPUTS (IN_n+, IN_n-)
Z_Rx-DIFF-DC
Z_Rx-DC
Rx DC differential mode impedance
Rx DC single ended impedance
RL_Rx-DIFF
Rx Differential Input return loss
RL_Rx-CM
Rx Common mode return loss
V_{Rx-ASSERT-DIFF-PP}
Signal detect assert level for active
data signal
V_{Rx-DEASSERT-DIFF-} Signal detect de-assert for inactive
PP
signal level
HIGH SPEED OUTPUTS
RL_Tx-DIFF
RL_Tx-CM
Z_Tx-DIFF-DC
I_Tx-SHORT
V_{Tx-CM-DC-LINE-}
DELTA
Tx Differential return loss
Tx Common mode return loss
DC differential Tx impedance
Transmitter short circuit current limit
Absolute delta of DC common mode
voltage between Tx+ and Tx-
V_Tx-DIFF1-PP
Output Voltage Differential Swing
V_Tx-DIFF2-PP
Output Voltage Differential Swing
V_Tx-DIFF3-PP
Output Voltage Differential Swing
TEST CONDITIONS
Tested at VDD = 2.5 V
Tested at VDD = 2.5 V
SDD11 10 MHz
SDD11 2 GHz
SDD11 6-11.1 GHz
SCC11 0.05 - 5 GHz
SD_TH = F (float),
1010 pattern at 12 Gbps
SD_TH = F (float),
1010 pattern at 12 Gbps
SDD22 10 MHz - 2 GHz
SDD22 5.5 GHz
SDD22 11.1 GHz
SCC22 50 MHz- 2.5 GHz
Total current when output is
shorted to VDD or GND
Differential measurement with
OUT_n+ and OUT_n-,
AC-Coupled and terminated by
50 Ω to GND,
Inputs AC-Coupled,
Measured with 8T Pattern at 12
Gbps ⁽¹⁾
VID = 600 mVp-p
VOD = Level 6⁽²⁾⁽³⁾
Differential measurement with
OUT_n+ and OUT_n-,
AC-Coupled and terminated by
50 Ω to GND,
Inputs AC-Coupled,
Measured with 8T Pattern at 12
Gbps ⁽¹⁾
VID = 1000 mVp-p
VOD = Level 6⁽²⁾⁽³⁾
Differential measurement with
OUT_n+ and OUT_n-,
AC-Coupled and terminated by
50 Ω to GND,
Inputs AC-Coupled,
Measured with 8T Pattern at 12
Gbps ⁽¹⁾
VID = 1200 mVp-p
VOD = Level 6⁽²⁾⁽³⁾
MIN
TYP
MAX UNIT
80
100
120 Ω
40
50
60 Ω
-19
-14
dB
-8
-10
dB
57
mVp-p
44
mVp-p
-15
dB
-12
-10
dB
-8
dB
100
Ω
20
mA
25 mV
615
mVp-p
950
mVp-p
1100
mVp-p
(1) 8T pattern is defined as a 1111111100000000'b pattern bit sequence.
(2) ATE measurements for production are tested at DC.
(3) In PCIe applications, the output VOD level is not fixed. It adjusts automatically based on the VID input amplitude level. The output VOD
level set by VODA/B[1:0] depends on the VID level and the frequency content. The DS80PCI810 repeater is designed to be transparent
in this mode, so the Tx-FIR (de-emphasis) is passed to the Rx to support the handshake negotiation link training.
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