SM8750AV datasheet(8/10 Pages) NPC

No de pièce	SM8750AV

Description	Data Jitter Measurement IC

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Fabricant	NPC [Nippon Precision Circuits Inc]

Site Internet	http://www.npc.co.jp/en

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SM8750AV

NIPPON PRECISION CIRCUITS—8

Converter Coefﬁcient Measurement Mode

When the serial interface bit GMES is set HIGH,

converter coefﬁcient measurement mode is invoked.

In this mode, a voltage equivalent to a phase differ-

ence of ±0.5T, determined by the POLAR input bit,

is output on TVOUT. Internally, the difference in

pulsewidth between the charge/discharge signals is

±1T, where the charge pump circuit capacitance is

double the capacitance during normal operation in

order to generate outputs equivalent to phase differ-

ences of ±0.5T.

Figure 3. Converter coefﬁcient measurement mode timing (POLAR = LOW)

Figure 4. Converter coefﬁcient measurement mode timing (POLAR = HIGH)

RDCLK

START

Reset

VREF2

Conversion voltage

(corresponds to

−0.5T)

Internal charge signal

Internal discharge signal

TVOUT output

RDCLK

START

Reset

VREF2

Conversion voltage

(corresponds to +0.5T)

Internal charge signal

Internal discharge signal

TVOUT output

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SM8750AV Fiches technique(PDF) 8 Page - Nippon Precision Circuits Inc

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