PMIC - V/F and F/V Converters

Part Number	Description / PDF	Quantity
AD652JP-REEL7 Analog Devices, Inc.	VOLTAGE TO FREQUENCY CONVERTER	1750
AD636KCWE Analog Devices, Inc.	AD636 RMS TO DC CONVERTER	0
TC9400COD Roving Networks / Microchip Technology	IC F/V & V/F CONV 100KHZ 14SOIC	77
LM2907M-8 Texas Instruments	IC F/V CONV 10KHZ 8SOIC	17109975
AD652JPZ-REEL Analog Devices, Inc.	AD652 - IC, SYNC V/F CONV IC	3695
AD650SD/883B Analog Devices, Inc.	IC F/V & V/F CONV 1MHZ 14CDIP	0
LM2907MX/NOPB Texas Instruments	IC F/V CONV 10KHZ 14SOIC	286910000
AD7740YRMZ-REEL Analog Devices, Inc.	IC V/F CONV 1MHZ 8MSOP	0
AD652AQ Analog Devices, Inc.	VOLTAGE TO FREQUENCY CONVERTER,	453
5962-9322201MEA Analog Devices, Inc.	DUAL MARKED (AD652SQ/883B)	322
NTE890 NTE Electronics, Inc.	IC-VOLTG TO FREQ CONV 8-LEAD DIP	232
AD7741BN Analog Devices, Inc.	VOLTAGE TO FREQUENCY CONVERTER	139
AD654JRZ-REEL Analog Devices, Inc.	IC V/F CONV 500KHZ 8SOIC	1781
AD650AD Analog Devices, Inc.	IC F/V & V/F CONV 1MHZ 14CDIP	36
AD537SD/883B Analog Devices, Inc.	VOLTAGE-TO-FREQUENCY CONVERTER	467
TC9402CPD Roving Networks / Microchip Technology	IC F/V & V/F CONV 100KHZ 14DIP	60
LM2907N/NOPB Texas Instruments	IC F/V CONV 10KHZ 14DIP	6872
AD654JNZ/+ Analog Devices, Inc.	VOLTAGE TO FREQUENCY CONVERTER	1743
AD652AQ/+ Analog Devices, Inc.	VOLTAGE TO FREQUENCY CONVERTER,	692
AD650JP Analog Devices, Inc.	VOLTAGE TO FREQUENCY CONVERTER	1571

PMIC - V/F and F/V Converters

1. Overview

PMIC (Power Management Integrated Circuit) V/F (Voltage-to-Frequency) and F/V (Frequency-to-Voltage) converters are specialized signal conditioning ICs that enable bidirectional conversion between analog voltage signals and digital frequency signals. These converters play a critical role in industrial automation, precision measurement, and sensor interfacing applications where noise immunity and galvanic isolation are essential. Their ability to transform signals into frequency domains enhances resistance to electromagnetic interference (EMI) and simplifies long-distance signal transmission.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Basic V/F Converters	Linear voltage-to-frequency transfer, typical ranges 0-10V to 1kHz-100kHz	Simple sensor signal conditioning
High-Precision F/V	0.01% nonlinearity, temperature compensation	Calibration equipment
Bidirectional Converters	Automatic mode switching, isolation amplifiers integrated	Motor speed control systems
Wideband V/F	Up to 1MHz frequency range, fast transient response	Communication systems

3. Structural Composition

Typical physical structure includes:

Input conditioning stage (attenuation/amplification)
Conversion core (voltage-controlled oscillator or phase-locked loop)
Temperature compensation circuitry
Output driver (CMOS/TTL compatible)
Power supply regulation section

Advanced packages integrate isolation barriers (capacitive or inductive) for high-voltage applications.

4. Key Technical Specifications

Parameter	Description	Importance
Conversion Accuracy	Typically 0.01-0.5% of full scale	Determines measurement precision
Frequency Range	1Hz to 10MHz operational bandwidth	Defines application scope
Temperature Stability	5ppm/ C drift	Affects reliability in harsh environments
Power Supply Rejection	80dB typical	Reduces noise sensitivity
Isolation Voltage	Up to 5kV RMS	Safety and noise isolation

5. Application Areas

Industrial automation (PLC analog I/O modules)
Electric vehicle battery management systems
Aerospace sensor interfaces (vibration, pressure)
Smart grid metering equipment
Medical diagnostic devices

Case Study: In CNC machine tools, V/F converters interface analog position sensors with digital control systems, achieving 0.02% positioning accuracy.

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Texas Instruments	VFC32K	16-bit resolution, 100kHz bandwidth
Analog Devices	AD654	Low-power, 1MHz output
STMicroelectronics	LTC690	Programmable oscillator, 0.2% accuracy
Maxim Integrated	MAX331	Galvanic isolation up to 5kV

7. Selection Guidelines

Define required conversion direction (uni/bidirectional)
Evaluate signal bandwidth requirements
Assess environmental conditions (temperature, vibration)
Consider isolation requirements for safety
Analyze cost/performance trade-offs

Recommendation: For industrial process control, prioritize temperature stability (>0.05%/ C) and isolation voltage (>2.5kV).

8. Industry Trends

Key development directions include:

Integration with digital interfaces (I2C, SPI)
Embedded self-calibration algorithms
Reduced package sizes (DFN, BGA formats)
Lower power consumption (<10 A standby current)
Increased radiation hardness for aerospace applications