Ultrafast SiGe

ECL Clock/Data Buffers

ADCLK905/ADCLK907/ADCLK925

Rev. 0

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FEATURES

95 ps propagation delay

7.5 GHz toggle rate

60 ps typical output rise/fall

60 fs random jitter (RJ)

On-chip terminations at both input pins

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

APPLICATIONS

Clock and data signal restoration and level shifting

Automated test equipment (ATE)

High speed instrumentation

High speed line receivers

Threshold detection

Converter clocking

GENERAL DESCRIPTION

The ADCLK905 (one input, one output), ADCLK907 (dual one

input, one output), and ADCLK925 (one input, two outputs) are

ultrafast clock/data buffers fabricated on the Analog Devices, Inc.,

proprietary XFCB3 silicon germanium (SiGe) bipolar process.

The ADCLK905/ADCLK907/ADCLK925 feature full-swing

emitter coupled logic (ECL) output drivers. For PECL (positive

The buffers offer 95 ps propagation delay, 7.5 GHz toggle rate,

10 Gbps data rate, and 60 fs random jitter (RJ).

The inputs have center tapped, 100 Ω, on-chip termination

The ECL output stages are designed to directly drive 800 mV

differential output swing of 1.6 V.

The ADCLK905/ADCLK907/ADCLK925 are available in

16-lead LFCSP packages.

TYPICAL APPLICATION CIRCUITS

D

D

Q

Q

Figure 1. ADCLK905 ECL 1:1 Clock/Data Buffer

D1

D1

Q1

Q1

D2

Q2

D2

Q2

Figure 2. ADCLK907 ECL Dual 1:1 Clock/Data Buffer

D

D

Q1

Q1

Q2

Q2

Figure 3. ADCLK925 ECL 1:2 Clock/Data Fanout Buffer