Ultrafast, SiGe, Open-Collector

HVDS Clock/Data Buffer

ADCLK914

Rev. A

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FEATURES

FEATURES

7.5 GHz operating frequency

7.5 GHz operating frequency

160 ps propagation delay

160 ps propagation delay

100 ps output rise/fall

100 ps output rise/fall

110 fs random jitter

110 fs random jitter

On-chip input terminations

On-chip input terminations

Extended industrial temperature range: −40°C to +125°C

Extended industrial temperature range: −40°C to +125°C

APPLICATIONS

APPLICATIONS

Clock and data signal restoration

Clock and data signal restoration

High speed converter clocking

High speed converter clocking

Broadband communications

Broadband communications

Cellular infrastructure

Cellular infrastructure

High speed line receivers

High speed line receivers

ATE and high performance instrumentation

ATE and high performance instrumentation

Level shifting

Level shifting

Threshold detection

Threshold detection

FUNCTIONAL BLOCK DIAGRAM

FUNCTIONAL BLOCK DIAGRAM

D

D

Q

Q

D

D

Q

Q

50Ω

50Ω

50Ω

50Ω

ADCLK914

Figure 1.

GENERAL DESCRIPTION

The ADCLK914 is an ultrafast clock/data buffer fabricated on

the Analog Devices, Inc., proprietary, complementary bipolar

(XFCB-3) silicon-germanium (SiGe) process. The ADCLK914

features high voltage differential signaling (HVDS) outputs

suitable for driving the latest Analog Devices high speed digital-

to-analog converters (DACs). The ADCLK914 has a single,

differential open-collector output.

The ADCLK914 buffer operates up to 7.5 GHz with a 160 ps

propagation delay and adds only 110 fs random jitter (RJ).

The input has a center tapped, 100 Ω, on-chip termination

resistor and accepts LVPECL, CML, CMOS, LVTTL, or LVDS

inputs.

The HVDS output stage is designed to directly drive 1.9 V each

swing of 3.8 V.

The ADCLK914 is available in a 16-lead LFCSP. It is specified

for operation over the extended industrial temperature range of

−40°C to +125°C.