INDUSTRIAL Phase Locked Loops (PLL) & Frequency Synthesis Circuits 2,400+

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Part	Manufacturer	Other IC type	Temperature Grade	No. of Terminals	Package Code	Package Shape	Surface Mount	Package Body Material	Maximum Supply Current (Isup)	No. of Functions	Technology	Terminal Form	Nominal Supply Voltage (Vsup)	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Sub-Category	Terminal Pitch	Maximum Operating Temperature	Minimum Operating Temperature	Terminal Finish	Terminal Position	JESD-30 Code	Moisture Sensitivity Level (MSL)	Maximum Supply Voltage (Vsup)	Maximum Seated Height	Width (mm)	Qualification	Minimum Supply Voltage (Vsup)	Additional Features	JESD-609 Code	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length
AD9958YSV	Analog Devices		INDUSTRIAL	56	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		1.8,3.3	CHIP CARRIER	LCC56,.31SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N56					Not Qualified
AD45030Z-RL7	Analog Devices	PHASE DETECTOR	INDUSTRIAL	8	SON	RECTANGULAR	YES	PLASTIC/EPOXY				NO LEAD		3/5	SMALL OUTLINE	SOLCC8,.08,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		DUAL	R-PDSO-N8					Not Qualified
AD9854ASQ	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	80	HLQFP	SQUARE	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	3.3 V		FLATPACK, HEAT SINK/SLUG, LOW PROFILE			.65 mm	85 Cel	-40 Cel	TIN LEAD	QUAD	S-PQFP-G80	3	3.465 V	1.6 mm	14 mm	Not Qualified	3.135 V		e0		240	14 mm
AD9958YSV-REEL7	Analog Devices		INDUSTRIAL	56	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		1.8,3.3	CHIP CARRIER	LCC56,.31SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N56					Not Qualified
AD9954YSV-REEL	Analog Devices		INDUSTRIAL	48	QFP	SQUARE	YES	PLASTIC/EPOXY			CMOS	GULL WING	1.8 V	1.8	FLATPACK	TQFP48,.35SQ	PLL or Frequency Synthesis Circuits	.5 mm	105 Cel	-40 Cel		QUAD	S-PQFP-G48					Not Qualified
MAX2880ETP+T	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	20	HVQCCN	SQUARE	YES	UNSPECIFIED		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	QUAD	S-XQCC-N20	1	3.6 V	.8 mm	4 mm		2.8 V		e3	30	260	4 mm
MAX2880ETP+	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	20	HVQCCN	SQUARE	YES	UNSPECIFIED		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	Matte Tin (Sn) - annealed	QUAD	S-XQCC-N20	1	3.6 V	.8 mm	4 mm		2.8 V		e3	30	260	4 mm
HMC828LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1	3.5 V	.9 mm	6 mm	Not Qualified	3 V	IT ALSO OPERATES WITH 4.8V-5.2V SUPPLY	e3		260	6 mm
HMC831LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1	3.5 V	.9 mm	6 mm	Not Qualified	3 V		e3			6 mm
HMC783LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3	3.45 V	.9 mm	6 mm	Not Qualified	3 V		e3	30	260	6 mm
HMC831LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC764LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3	3.45 V	.9 mm	6 mm	Not Qualified	3 V		e3		260	6 mm
HMC820LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC840LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1				Not Qualified			e3	30	260
HMC700LP4RTR	Analog Devices		INDUSTRIAL	24	QCCN	SQUARE	YES	PLASTIC/EPOXY	110 mA		BICMOS	NO LEAD		3.3,5	CHIP CARRIER	LCC24,.16SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N24					Not Qualified
HMC828LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1				Not Qualified			e3		260
HMC778LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY	290 mA		CMOS	NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC834LP6GE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1	3.5 V	.9 mm	6 mm		3 V	ALSO OPERATES AT 5 V SUPPLY	e3		260	6 mm
HMC824LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC837LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC703LP4E	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	24	HVQCCN	SQUARE	YES	PLASTIC/EPOXY	95 mA	1		NO LEAD	3.3 V	3.3,5	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC24,.16SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N24	1	3.5 V	1 mm	4 mm	Not Qualified	2.7 V		e3	30	260	4 mm
HMC822LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1	CMOS	NO LEAD	3.3 V	3.3,5	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1	3.5 V	.9 mm	6 mm	Not Qualified	3 V	IT ALSO OPERATES WITH 4.8V-5.2V SUPPLY	e3			6 mm
HMC807LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY	250 mA			NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC783LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY	190 mA			NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC764LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY	290 mA			NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3				Not Qualified			e3	30	260
HMC826LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC838LP6CETR	Analog Devices	PHASE DETECTOR	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC839LP6CETR	Analog Devices	PHASE DETECTOR	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC769LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY	300 mA			NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC822LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY			CMOS	NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC834LP6GETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1				Not Qualified			e3		260
HMC807LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY	250 mA	1		NO LEAD	3.3 V	3.3,5	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3	3.45 V	.9 mm	6 mm	Not Qualified	3 V	IT ALSO OPERATES WITH 4.75V-5.25V SUPPLY	e3	30	260	6 mm
HMC769LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3	3.5 V	.9 mm	6 mm		2.7 V		e3			6 mm
HMC767LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3	3.5 V	.9 mm	6 mm		2.7 V		e3			6 mm
HMC824LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1	3.5 V	.9 mm	6 mm	Not Qualified	3 V	IT ALSO OPERATES WITH 4.8V-5.2V SUPPLY	e3			6 mm
HMC836LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N40					Not Qualified				NOT SPECIFIED	NOT SPECIFIED
HMC820LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V	3.3,5	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1	3.5 V	.9 mm	6 mm	Not Qualified	3 V	IT ALSO OPERATES WITH 4.8V-5.2V SUPPLY	e3			6 mm
HMC700LP4ERTR	Analog Devices		INDUSTRIAL	24	QCCN	SQUARE	YES	PLASTIC/EPOXY	110 mA		BICMOS	NO LEAD		3.3,5	CHIP CARRIER	LCC24,.16SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N24					Not Qualified
HMC765LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V		CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3	3.45 V	.9 mm	6 mm	Not Qualified	3 V		e3		260	6 mm
HMC767LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY				NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3				Not Qualified			e3	30	260
HMC765LP6CETR	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	QCCN	SQUARE	YES	PLASTIC/EPOXY	290 mA			NO LEAD		3.3,5	CHIP CARRIER	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	3				Not Qualified			e3	30	260
HMC826LP6CE	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	40	HVQCCN	SQUARE	YES	PLASTIC/EPOXY		1		NO LEAD	3.3 V	3.3,5	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC40,.24SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-PQCC-N40	1	3.5 V	.9 mm	6 mm	Not Qualified	3 V	IT ALSO OPERATES WITH 4.8V-5.2V SUPPLY	e3			6 mm
ADF4107BRUZ-REEL	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	3 V	3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP16,.25	PLL or Frequency Synthesis Circuits	.65 mm	85 Cel	-40 Cel	MATTE TIN	DUAL	R-PDSO-G16	1	3.3 V	1.2 mm	4.4 mm	Not Qualified	2.7 V		e3	30	260	5 mm
ADF4117BRUZ-REEL7	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	5.5 mA	1	BICMOS	GULL WING	3 V	3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP16,.25	PLL or Frequency Synthesis Circuits	.65 mm	85 Cel	-40 Cel	MATTE TIN	DUAL	R-PDSO-G16	1	5.5 V	1.2 mm	4.4 mm	Not Qualified	2.7 V		e3		260	5 mm
ADF4217LBRUZ	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	3 V		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel	MATTE TIN	DUAL	R-PDSO-G20		3.3 V	1.2 mm	4.4 mm	Not Qualified	2.6 V	ALSO REQUIRES A 3V TO 5.5V SUPPLY	e3			6.5 mm
ADF4107BCPZ-REEL7	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	HVQCCN	SQUARE	YES	UNSPECIFIED		1		NO LEAD	3 V	3/5	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC20,.16SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	S-XQCC-N20	3	3.3 V	1 mm	4 mm	Not Qualified	2.7 V		e3		260	4 mm
ADF4219LBCC-REEL	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	24	QCCN	RECTANGULAR	YES	UNSPECIFIED		1		NO LEAD	3 V	3/5,3	CHIP CARRIER	LCC24,.16X.2,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	TIN LEAD	QUAD	R-XQCC-N24		3.3 V	1.2 mm	3.5 mm	Not Qualified	2.6 V	ALSO REQUIRES A 3V TO 5.5V SUPPLY	e0			4.5 mm
ADF4108BCPZ	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	VQCCN	SQUARE	YES	UNSPECIFIED		1	CMOS	NO LEAD	3.3 V	3.3	CHIP CARRIER, VERY THIN PROFILE	LCC20,.16SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	MATTE TIN	QUAD	R-XQCC-N20	3	3.6 V	1 mm	4 mm	Not Qualified	3.2 V		e3		260	4 mm

Phase Locked Loops (PLL) & Frequency Synthesis Circuits

Phase Locked Loops (PLL) and Frequency Synthesis Circuits are electronic circuits used to generate and control stable and precise frequencies for use in various applications, such as communication systems, signal processing, and instrumentation.

A PLL is a feedback system that compares the phase of an input signal to the phase of a reference signal and adjusts the output frequency to match the reference frequency. The basic components of a PLL include a phase detector, a low-pass filter, a voltage-controlled oscillator (VCO), and a frequency divider. The phase detector compares the phase of the input and reference signals and generates an error signal that is filtered and used to adjust the frequency of the VCO. The output of the VCO is divided by a frequency divider to generate the output frequency. PLLs are commonly used for frequency synthesis, clock recovery, and phase modulation/demodulation.

Frequency synthesis circuits are electronic circuits used to generate precise and stable frequencies by combining multiple signals with different frequencies. These circuits use various techniques, such as direct digital synthesis (DDS), fractional-N synthesis, and frequency mixing to generate frequencies. DDS is a technique that uses a digital signal generator to generate a waveform with a specific frequency, phase, and amplitude. Fractional-N synthesis is a technique that uses a PLL to generate a frequency that is a fraction of the reference frequency. Frequency mixing is a technique that combines two signals with different frequencies to generate a signal with a frequency equal to the difference between the two frequencies.

PLLs and frequency synthesis circuits are critical components in many electronic systems that require precise and stable frequencies. These circuits are used in communication systems, signal processing, instrumentation, and other applications where accurate frequency generation and control is required.