74HCT9046APW datasheet(9/43 Pages) NXP

部品番号	74HCT9046APW

部品情報	PLL with band gap controlled VCO

Download	43 Pages

Scroll/Zoom	100%

メーカー	NXP [NXP Semiconductors]

ホームページ	http://www.nxp.com

Logo

9 / 43 page

74HCT9046A_6

Product data sheet

Rev. 06 — 15 September 2009

9 of 43

NXP Semiconductors

74HCT9046A

PLL with band gap controlled VCO

8.3.2 Phase Comparator 2 (PC2)

This is a positive edge-triggered phase and frequency detector. When the PLL is using

this comparator, the loop is controlled by positive signal transitions and the duty cycles of

SIG_IN and COMP_IN are not important. PC2 comprises two D-type ﬂip-ﬂops, control

gating and a 3-state output stage with sink and source transistors acting as current

sources, henceforth called charge pump output of PC2. The circuit functions as an

up-down counter (see Figure 4) where SIG_IN causes an up-count and COMP_IN a down

count. The current switch charge pump output allows a virtually ideal performance of PC2,

due to appliance of some pulse overlap of the up and down signals, see Figure 8a.

The pump current Icp is independent from the supply voltage and is set by the internal

band gap reference of 2.5 V.

Where Rbias is the external bias resistor between pin RB and ground.

The current and voltage transfer function of PC2 are shown in Figure 9.

The phase comparator gain is:

Fig 7.

Typical waveforms for PLL using phase comparator 1; loop-locked at f0

mbd100

PC1_OUT

VCO_IN

VCC

GND

VCO_OUT

COMP_IN

SIGN_IN

C1A

C1B

VC1A

VC1B

I

cp

17

2.5

R

bias

------------ A

()

×

=

K

P

I

cp

2

π

---------- Ar

⁄

()

=

同様の部品番号 - 74HCT9046APW

メーカー	部品番号	データシート	部品情報
NXP Semiconductors	74HCT9046A	240Kb / 40P	PLL with bandgap controlled VCO 1999 Jan 11
Nexperia B.V. All right...	74HCT9046A	667Kb / 36P	PLL with band gap controlled VCO Rev. 9 - 20 March 2020
NXP Semiconductors	74HCT9046AD	240Kb / 40P	PLL with bandgap controlled VCO 1999 Jan 11
Nexperia B.V. All right...	74HCT9046AD	667Kb / 36P	PLL with band gap controlled VCO Rev. 9 - 20 March 2020
NXP Semiconductors	74HCT9046AN	240Kb / 40P	PLL with bandgap controlled VCO 1999 Jan 11

More results

同様の説明 - 74HCT9046APW

メーカー	部品番号	データシート	部品情報
Nexperia B.V. All right...	74HCT9046A	667Kb / 36P	PLL with band gap controlled VCO Rev. 9 - 20 March 2020
NXP Semiconductors	74HCT9046A	240Kb / 40P	PLL with bandgap controlled VCO 1999 Jan 11
Analog Devices	ADMV4420	1Mb / 61P	K Band Downconverter with Integrated Fractional-N PLL and VCO
	ADMV4540	4Mb / 54P	K Band Quadrature Demodulator with Integrated Fractional-N PLL and VCO
	ADMV4530	1Mb / 59P	Dual-Mode, Ka Band Upconverter with Integrated Fractional-N PLL and VCO
Texas Instruments	TRF3761	443Kb / 18P	[Old version datasheet] INTEGER-N PLL WITH INTEGRATED VCO
Texas Instruments	TRF3762	1Mb / 33P	[Old version datasheet] INTEGER-N PLL WITH INTEGRATED VCO
Analog Devices	HMC837LP6CE	777Kb / 12P	FRACTIONAL-N PLL WITH INTEGRATED VCO
Semtech Corporation	SX1781	460Kb / 16P	PLL Frequency Synthesizer with Integrated VCO
Semtech Corporation	ACS1790T	1Mb / 48P	PLL Frequency Synthesizer with Integrated VCO