Datasheet > M2060-12-670.8386

M2060-12-670.8386

更新时间： 2023-02-26 13:46:45

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
12页	456K
描述
Support Circuit, 1-Func, CQCC36, 9 X 9 MM, CERAMIC, LCC-36

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M2060/61/62, M2065/66/67

Integrated

Circuit

Systems, Inc.

VCSO FEC PLL FOR SONET/OTN

P r e l i m i n a r y I n f o r m a t i o n

External Loop Filter

To provide stable PLL operation, the M2060/61/62 or

M2065/66/67 requires use of an external loop filter. This

is provided via the provided filter pins (see Figure 5).

The loop filter is implemented as a differential circuit

to minimize system noise interference.

R_LOOPC_LOOP

R_POST

C_POST

R_LOOPC_LOOP

nOP_IN OP_OUT

R_POST

OP_IN

nOP_OUT

nVC

Figure 5: External Loop Filter

PLL bandwidth is affected by loop filter component

values, “Mfec” and “Mfin” values, and the “PLL Loop

Constants” listed in AC Characteristics on pg. 11.

The FEC_SEL setting can be used to actively change PLL

loop bandwidth in a given application. See “Mfec and

Rfec Divider Look-Up Tables (LUTs)” on pg. 3.

See Table 10, Example Values for Loop Filter External

Components, on pg. 8.

PLL Simulator Tool Available

A free PC software utility is available on the ICS website

(www.icst.com). The M2000 Timing Modules PLL

Simulator is a downloadable application that simulates

PLL jitter and wander transfer characteristics. This

enables the user to set appropriate external loop

component values in a given application.

Example Values for Loop Filter External Components

for Particular M206x Series Devices

VCSO Parameters: K

= 800kHz/V, R = 100k

Ω

(pin NBW = 0), VCSO Bandwidth = 700kHz.

VCO

Device

Device Configuration

Example External Component Values

Nominal Performance With These Values

FIN_SEL MRSEL

1:0

F_Ref

F_VCSO

R loop

C loop

R post

C post

PLL Loop Damping Passband

1:0

Bandwidth Factor Peaking(dB)

(MHz)

M2060, M2060 622.08 622.08

1 1

0 1

6.5

5.9

6.5

0.05

0.06

0.05

5.6kΩ

243.0kΩ

8.2kΩ

10µF

0.1µF

10µF

68kΩ

34kΩ

100kΩ

470pF

530Hz

1kHz

M2060, M2065 155.52 669.3266 1 0

1 0 0

0 1

M2061, M2066 77.76 622.08

M2061

0 1

0 0

360Hz

19.44 622.08

1 1

8.2kΩ

360Hz

Table 10: Example Values for Loop Filter External Components

Note 1: K_VCO, VCSO Bandwidth, M Divider Value, and External Loop Filter Component Values determine Loop Bandwidth, Damping Factor, and

Passband Peaking. For PLL Simulator software, go to www.icst.com.

Refer to the M206x Series product web page at

www.icst.com/products/summary/m2060-2067.htm

for additional product information.

M2060/61/62 M2065/66/67 Datasheet Rev 0.4

8 of 12

Revised 30Jul2004

Integrated Circuit Systems, Inc. ● Networking & Communications ● www.icst.com ● tel (508) 852-5400

1...5 6 789 10 11 12

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与M2060-12-670.8386相关器件

型号	品牌	描述	获取价格	数据表
M2060-12-670.8386LF	IDT	Support Circuit, 1-Func, CQCC36, 9 X 9 MM, CERAMIC, LCC-36	获取价格
M2060-12-672.1600	IDT	Support Circuit, 1-Func, CQCC36, 9 X 9 MM, CERAMIC, LCC-36	获取价格
M2060-12-690.5692LF	IDT	Support Circuit, 1-Func, CQCC36, 9 X 9 MM, CERAMIC, LCC-36	获取价格
M2060-12I622.0800LF	IDT	Support Circuit, 1-Func, CQCC36, 9 X 9 MM, CERAMIC, LCC-36	获取价格
M2060-12I625.0000LF	IDT	Support Circuit, 1-Func, CQCC36, 9 X 9 MM, CERAMIC, LCC-36	获取价格
M2060-12I644.5313	IDT	Support Circuit, 1-Func, CQCC36, 9 X 9 MM, CERAMIC, LCC-36	获取价格

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