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

Symbol Parameter

Conditions

Reference

Min

Typ

Max

Units

Input Voltage High Level

Logic Inputs

2.0

V

Input Voltage Low Level

0.8

V

Output Voltage High Level

Logic Outputs

2.4

V

Output Voltage Low Level

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

(2)

Input Mode (Equalizer) DC Electrical Characteristics

Over Supply Voltage and Operating Temperature ranges, unless otherwise specified

Symbol Parameter

Conditions

Reference

Min

Typ

Max

Units

Input Voltage Swing

BNC_IO

720

800

950

Differential Output Voltage, P-P

100

Ω load, default register

SDO, SDO

500

700

900

settings, Figure 1(4)

Differential Output Voltage

250

350

450

mV

50

mV

Complimentary Output States

Offset Voltage

1.125

1.25

1.375

V

50

mV

Complimentary Output States

Output Short Circuit Current

30

mA

1.3

V

0.8

V

Supply Current

Equalizing cable > 120m

91

113

mA

(Belden 1694A), TX_EN = 0

Equalizing cable

≤ 120m

71

mA

Power save mode (equalizer in

11

mA

sleep mode, TX_EN = 0)

(1)

Current flow into device pins is defined as positive. Current flow out of device pins is defined as negative. All voltages are stated

(2)

(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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