LMH0387SL Datasheet, PDF (6/23 Pages) Texas Instruments – LMH0387 3 Gbps HD/SD SDI Configurable I/O Adaptive Cable Equalizer / Cable Driver

LMH0387
SNLS315G – APRIL 2010 – REVISED APRIL 2013
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Control Pin Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified⁽¹⁾⁽²⁾.
Symbol Parameter
Conditions
Reference
Min
Typ
Max Units
V_IH
Input Voltage High Level
V_IL
Input Voltage Low Level
V_OH
Output Voltage High Level
V_OL
Output Voltage Low Level
I_OH = -2 mA
I_OL = +2 mA
Logic Inputs
2.0
V_EE
Logic Outputs 2.4
V_CC
V
0.8
V
V
0.4
V
(1) Current flow into device pins is defined as positive. Current flow out of device pins is defined as negative. All voltages are stated
referenced to V_EE = 0 Volts.
(2) Typical values are stated for V_CC = +3.3V and T_A = +25°C.
Input Mode (Equalizer) DC Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified⁽¹⁾⁽²⁾.
Symbol Parameter
V_IN
V_SSP-P
V_OD
ΔV_OD
Input Voltage Swing
Differential Output Voltage, P-P
Differential Output Voltage
Change in Magnitude of V_OD for
Complimentary Output States
Conditions
0m cable length⁽³⁾
100Ω load, default register
settings, Figure 1⁽⁴⁾
Reference
BNC_IO
SDO, SDO
Min
Typ
Max Units
720
800
950 mV_P−P
500
700
900
mV_P-P
250
350
450
mV
50
mV
V_OS
ΔV_OS
Offset Voltage
Change in Magnitude of V_OS for
Complimentary Output States
1.125 1.25 1.375
V
50
mV
I_OS
Output Short Circuit Current
CD_THRESH DC Voltage (floating)
CD_THRESH Range
I_CC
Supply Current
Equalizing cable > 120m
(Belden 1694A), TX_EN = 0
CD_THRESH
30
mA
1.3
V
0.8
V
91
113
mA
Equalizing cable ≤ 120m
(Belden 1694A), TX_EN = 0⁽⁵⁾
71
mA
Power save mode (equalizer in
sleep mode, TX_EN = 0)
11
mA
(1) Current flow into device pins is defined as positive. Current flow out of device pins is defined as negative. All voltages are stated
referenced to V_EE = 0 Volts.
(2) Typical values are stated for V_CC = +3.3V and T_A = +25°C.
(3) The LMH0387 equalizer can be optimized for different launch amplitudes via the SPI.
(4) The differential output voltage and offset voltage are adjustable via the SPI.
(5) The equalizer automatically shifts equalization stages at cable lengths less than or equal to 120m (Belden 1694A) to reduce power
consumption. This power savings is also achieved by setting Extended 3G Reach Mode = 1 via the SPI. (Note: Forcing the Extended
3G Reach Mode in this way increases the cable reach for 3G data rates but also limits the achievable cable lengths at HD and SD data
rates).
6
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