02 | Keysight | N4982A Clock Recovery Unit - Data Sheet

– Low jitter output clock

– Low power dissipation

– Precision connectors

– Excellent signal quality

– Single low voltage DC supply

N4982A Clock Recovery Units

Description

The Keysight Technologies, Inc. N4982A series of clock recovery units (CRU) cover data

rates from 19 to 36 Gb/s and 39.8 to 44 Gb/s with three different model options. The

CRU modules utilize silicon germanium (SiGe) technology and offer both small size, and

low power consumption.

Applications

The N4982A CRU modules can be used to extract a low jitter clock for 40G and 100G

applications such as IEEE 802.3, OIF/CEI 25/28G, 32G Fiberchannel, 25G Infiniband,

etc. The CRU’s have sufficient bandwidth to operate both at common base rates, e.g.

25.78125 Gb/s, as well as in applications that require added bandwidth for forward error

correction (FEC), e.g. 27.95, 30.9375 Gb/s. Broadband test systems will benefit from the

low power dissipation, precision connectors and excellent signal quality.

Specifications at 33 °C case temperature

Parameter

Model-option number

Units

N4982A-R19

N4982A-R25

N4982A-R28

Data input

Bit rate

19.0 to 26.0

39.8 to 44.0

25.3 to 32.0

27.9 to 36.0

Gb/s

Amplitude

100 to 1400

150 to 1400

50 to 1400

50 to 1400

mV p-p

Reference clock input

Type

Half-rate

Quarter-rate

Quarter-rate

Quarter-rate

Frequency

9.5 to 13.0

9.95 to 11.0

6.325 to 8.0

6.975 to 9.0

GHz

Amplitude

200 to 1400

50 to 1400

50 to 1400

mV p-p

Clock output

Type

Full-rate

Half-rate

Half-rate

Half-rate

Frequency

19.0 to 26.0

19.9 to 22.0

12.65 to 16.0

13.95 to 18.0

GHz

Amplitude (typical)

> 150

> 320

> 150

mV p-p

Jitter RMS (nominal)

0.5

0.5

0.5

ps

DC supply

Voltage

–3.6 V dc

–3.3 V dc

–3.3 V dc

V

Current (nominal)

270

220

220

mA

Absolute maximum ratings

Parameter

Value

Supply voltage (VEE)

–3.8 V

Control voltage applied to SELV and LOCk

Max: +0.05 V

Min: VEE - 0.05 V

Ref input power (REF)

+10 dBm

DC input voltage to DIN, REF and CKO

±1 V

Operating Temperature

0 to +70 °C

Storage Temperature

–50 to +125 °C

Table 1.

Table 2.

Compliant with RoHS

WEE requirements