GS12341 datasheet(13/109 Pages) SEMTECH

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GS12341

Final Data Sheet

Rev.1

PDS-061928

August 2019

13 of 109

Semtech

Proprietary & Confidential

www.semtech.com

PLL Loop Bandwidth

BWLOOP(125Mb/s)

Setting 0.0625x

—

kHz

Setting 0.125x

—

kHz

Setting 0.25x

—

kHz

Setting 0.5x (Default)

—

kHz

Setting 1.0x

—

150

—

kHz

BWLOOP(270Mb/s)

Setting 0.0625x

—

kHz

Setting 0.125x

—

kHz

Setting 0.25x

—

kHz

Setting 0.5x

—

160

—

kHz

Setting 1.0x (Default)

—

316

—

kHz

BWLOOP(1.485Gb/s)

Setting 0.0625x

—

110

—

kHz

Setting 0.125x

—

220

—

kHz

Setting 0.25x

—

440

—

kHz

Setting 0.5x (Default)

—

876

—

kHz

Setting 1.0x

—

1750

—

kHz

BWLOOP(2.97Gb/s)

Setting 0.0625x

—

220

—

kHz

Setting 0.125x

—

440

—

kHz

Setting 0.25x

—

880

—

kHz

Setting 0.5x (Default)

—

1.76

—

MHz

Setting 1.0x

—

3.5

—

MHz

BWLOOP(5.94Gb/s)

Setting 0.0625x

—

440

—

kHz

Setting 0.125x

—

880

—

kHz

Setting 0.25x

—

1.76

—

MHz

Setting 0.5x (Default)

—

3.5

—

MHz

Setting 1.0x

—

MHz

BWLOOP(11.88Gb/s)

Setting 0.0625x

—

880

—

kHz

Setting 0.125x

—

1.76

—

MHz

Setting 0.25x

—

3.5

—

MHz

Setting 0.5x (Default)

—

MHz

Setting 1.0x

—

MHz

Table Notes:

1. Values achieved with Semtech evaluation board and connector.

2. Measured using a clean input source.

3. Default value for CFG_EQ_INPUT_LAUNCH_SWING_COMP parameter in control register 0x18. The default parameter value is 80d (50h).

4. Default trace driver swing Setting.

5. Please see 4.3.3.1 for the further definition on Synchronous and Asynchronous Lock Time.

6. This specification applies to and DDO1/DDO1 and DDO0/DDO0.

7. Please see PLL_LOOP_ BANDWIDTH_ 0 for the full range of loop bandwidth settings.

8. Output Driver Setting of 8.

9. Output Driver Setting of 36.

10. Max jitter occurs at the maximum cable length.

11. Rise/fall time was measured between 80% and 20%.

12. The rise/fall time of signals at source should not be more than 62ns.

Table 2-3: AC Electrical Characteristics (Continued)

VCC_SDI, VCC_CORE, VDD = 1.8V ±5% and VCCO_0, VCCO_1 = +1.2/1.8/2.5V ±5%, TA = -40°C to +85°C, unless otherwise shown.

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Notes

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