DSC8122CE2-T [MICREL]

Programmable Low-Jitter Precision LVPECL Oscillator;


型号：	DSC8122CE2-T
厂家：	MICREL SEMICONDUCTOR
描述：	Programmable Low-Jitter Precision LVPECL Oscillator
文件：	总6页 (文件大小：605K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DSC8102 DSC8122

Programmable Low-Jitter Precision LVPECL Oscillator

General Description

Features

The DSC8102 & DSC8122 series of high

performance field-programmable oscillators

utilizes a proven silicon MEMS technology to

provide excellent jitter and stability over a

 Low RMS Phase Jitter: <1 ps (typ)

 High Stability: ±10, ±25, ±50 ppm

 Wide Temperature Range

o Industrial: -40° to 85° C

o Ext. commercial: -20° to 70° C

wide

range

supply

voltages

and

temperatures.

Using the TIMEFLASH

programmer, the end user can easily

program the oscillators’ frequency in the field

for immediate testing or use in advance

prototype development or production.

 High Supply Noise Rejection: -50 dBc

 Short Lead Time: 2 Weeks

 Wide Freq. Range: 10 to 460 MHz

DSC8102 has a standby feature allowing it to

completely power-down when EN pin is

pulled low; whereas for DSC8122, only the

outputs are disabled when EN is low. Both

oscillators are available in industry standard

packages, including the small 3.2x2.5 mm²,

and are “drop-in” replacement for standard

6-pin LVPECL quartz oscillators.

 Small Industry Standard Footprints

o 2.5x2.0, 3.2x2.5, 5.0x3.2, & 7.0x5.0 mm

 Excellent Shock & Vibration Immunity

o Qualified to MIL-STD-883

 High Reliability

o 20x better MTF than quartz oscillators

 Low Current Consumption

 Supply Range of 2.25 to 3.6 V

 Standby & Output Enable Function

 Lead Free & RoHS Compliant

 LVDS & HCSL Versions Available

Block Diagram

Applications

 Storage Area Networks

o SATA, SAS, Fibre Channel

 Passive Optical Networks

o EPON, 10G-EPON, GPON, 10G-PON

 Ethernet

o 1G, 10GBASE-T/KR/LR/SR, and FCoE

 HD/SD/SDI Video & Surveillance

 PCI Express: Gen 1 & Gen 2

 DisplayPort

Output Enable Modes

EN Pin

High

DSC8102

Outputs Active

Standby

DSC8122

Outputs Active

Outputs Disabled

Low

to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to

implied warranties of merchantability or fitness for a particular use.

Page 1 |

MK-Q-B-P-D-110410-02-2

Programmable Low-Jitter Precision LVPECL Oscillator

DSC8102 DSC8122

Absolute Maximum Ratings

Ordering Code

Item

Min

-0.3

Max

+4.0

Unit Condition

Supply Voltage

Input Voltage

Junction Temp

Storage Temp

Soldering Temp

Enable Modes

0: Enable/Standby

2: Enable/Disable

Temp Range

E: -20 to 70

I: -40 to 85

Packing

T: Tape & Reel

: Tube

V_DD+0.3

+150

°C

-55

+150

DSC81 0 2 C I 5

+260

40sec max.

Package

ESD

HBM

A: 7.0x5.0mm

Stability

1: ±50ppm

2: ±25ppm

5: ±10ppm

4000

400

B: 5.0x3.2mm

C: 3.2x2.5mm

D: 2.5x2.0 mm

CDM

1500

Note: 1000+ years of data retention on internal memory

Specifications

Parameter

Condition

Min.

Typ.

Max.

Unit

Supply Voltage¹

V_DD

I_DD

2.25

3.6

EN pin low – outputs are disabled

DSC8102

Supply Current

0.095

DSC8122

Includes frequency variations due

to initial tolerance, temp. and

power supply voltage

±10

±25

±50

Frequency Stability

Δf

ppm

Aging

Startup Time²

Δf

t_SU

1 year @25°C

T=25°C

±5

ppm

Input Logic Levels

Input logic high

Input logic low

V_IH

V_IL

0.75xV_DD

0.25xV_DD

Output Disable Time³

Output Enable Time

Enable Pull-Up Resistor⁴

t_DA

DSC8102

DSC8122

t_EN

Pull-up resistor exist

LVPECL Outputs

kΩ

Supply Current

I_DD

Output Enabled, R_L=50Ω

56.5

Output Logic Levels

Output logic high

Output logic low

V_OH

V_OL

R_L=50Ω

V_DD-1.08

V_DD-1.55

Pk to Pk Output Swing

Output Transition time³

Rise Time

Single-Ended

800

250

20% to 80%

R_L=50Ω, C_L= 0pF

t_R

t_F

Fall Time

Frequency

f₀

Single Frequency

Differential

460

MHz

Output Duty Cycle

Period Jitter

SYM

J_PER

2.5

ps_RMS

200kHz to 20MHz @156.25MHz

100kHz to 20MHz @156.25MHz

12kHz to 20MHz @156.25MHz

0.25

0.38

1.7

Integrated Phase Noise

J_PH

ps_RMS

Notes:

Pin 6 V_DDshould be filtered with 0.1uf capacitor.

t_suis time to 100ppm of output frequency after V_DDis applied and outputs are enabled.

Output Waveform and Test Circuit figures below define the parameters.

Output is enabled if pad is floated or not connected.

to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to

implied warranties of merchantability or fitness for a particular use.

Page 2 |

MK-Q-B-P-D-110410-02-2

Programmable Low-Jitter Precision LVPECL Oscillator

DSC8102 DSC8122

Nominal Performance Parameters (Unless specified otherwise: T=25° C, V_DD=3.3 V)

2.5

2.0

1.5

1.0

0.5

0.0

-10

-20

-30

-40

-50

-60

-70

-80

156MHz-LVPECL

212MHz-LVPECL

320MHz-LVPECL

410MHz-LVPECL

50-mV

100-mV

200

400

600

800

1000

0.1

100

1000

10000

Low-end of integration BW: x kHz to 20 MHz

Supply Noise Frequency (kHz)

Power supply rejection ratio

Phase jitter (integrated phase noise)

Output Waveform

t_R

t_F

Output

80%

50%

20%

830 mv

Output

t_EN

1/f_o

t_DA

V_IH

Enable

V_IL

Typical Termination Scheme

V_DD

0.1uF

130 Ω

100 Ω

82 Ω

to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to

implied warranties of merchantability or fitness for a particular use.

Page 3 |

MK-Q-B-P-D-110410-02-2

Programmable Low-Jitter Precision LVPECL Oscillator

DSC8102 DSC8122

Test Circuit

LVPECL

I_DD

50Ω

0.1uF

V_DD

0.01uF

V_DA

V_TT

V_TT=V_DD-2.0V

Solder Reflow Profile

20-40

Sec

260°C

MSL 1 @ 260°C refer to JSTD-020C

Ramp-Up Rate (200°C to Peak Temp) 3°C/Sec Max.

217°C

200°C

60-150

Sec

Preheat Time 150°C to 200°C

Time maintained above 217°C

Peak Temperature

Time within 5°C of actual Peak

Ramp-Down Rate

60-180 Sec

60-150 Sec

255-260°C

20-40 Sec

6°C/Sec Max.

8 min Max.

Reflow

60-180

Sec

150°C

Cool

Pre heat

Time 25°C to Peak Temperature

25°C

Time

8 min max

to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to

implied warranties of merchantability or fitness for a particular use.

Page 4 |

MK-Q-B-P-D-110410-02-2

Programmable Low-Jitter Precision LVPECL Oscillator

DSC8102 DSC8122

Package Dimensions

7.0 x 5.0 mm Plastic Package

No.

Pin terminal

Enable

GND

Output

VDD

5.0 x 3.2 mm Plastic Package

to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to

implied warranties of merchantability or fitness for a particular use.

Page 5 |

MK-Q-B-P-D-110410-02-2

Programmable Low-Jitter Precision LVPECL Oscillator

DSC8102 DSC8122

3.2 x 2.5 mm Plastic Package

2.5 x 2.0 mm Plastic Package

2.5±0.05 [0.098±0.002]

0.825 [ .032 ]

0.7±0.10 [0.028±0.004]

0.1 [.004] REF

0.375 [0.015]

0.65±0.05 [0.026±0.002]

2.0±0.05 [0.079±0.002]

0.25±0.05 [0.099±0.002]

0.85 [0.033]

0.70 [0.028]

0.65 [0.026]

0.25 [0.0098]

Disclaimer:

Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a

warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license,

whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of

sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including

liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.

MICREL, Inc.

Phone: +1 (408) 944-0800

●

2180 Fortune Drive,

Fax: +1 (408) 474-1000

San Jose, California

95131

●

USA

●

Email: hbwhelp@micrel.com

www.micrel.com

to the contents, products, programs or services described at any time without notice. This document neither states nor implies any kind of warranty, including, but not limited to

implied warranties of merchantability or fitness for a particular use.

Page 6 |

MK-Q-B-P-D-110410-02-2

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