PMIC - RMS to DC Converters

Image	Part Number	Description / PDF	Quantity	Rfq
	AD737JR-5-REEL Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	AD637JR-REEL Analog Devices, Inc.	IC RMS TO DC CONVERTER 16SOIC	0
	AD736BRZ-RL Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	LTC1966CMS8#TR Analog Devices, Inc.	IC RMS TO DC CONVERTER 8MSOP	0
	LTC1967IMS8 Analog Devices, Inc.	IC RMS TO DC CONVERTER 8MSOP	0
	AD736BR-REEL Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	AD736JR-REEL Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	AD736AR-REEL Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	AD8436BCPZ-WP Analog Devices, Inc.	IC RMS TO DC CONVERTER 20LFCSP	0
	AD737JR-5-REEL7 Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	LTC1967IMS8#TR Analog Devices, Inc.	IC RMS TO DC CONVERTER 8MSOP	0
	AD736BR-REEL7 Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	AD736AR-REEL7 Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	AD736KR-REEL Analog Devices, Inc.	IC RMS TO DC CONVERTER 8SOIC	0
	LTC1966MPMS8 Analog Devices, Inc.	IC RMS TO DC CONVERTER 8MSOP	0
	LTC1966MPMS8#TRM Analog Devices, Inc.	IC RMS TO DC CONVERTER 8MSOP	0
	LTC1966MPMS8#TR Analog Devices, Inc.	IC RMS TO DC CONVERTER 8MSOP	0

PMIC - RMS to DC Converters

1. Overview

RMS-to-DC converters are specialized Power Management Integrated Circuits (PMICs) that convert alternating current (AC) or time-varying signals into proportional direct current (DC) voltages equivalent to the root mean square (RMS) value of the input. These devices are critical in applications requiring precise power measurement, signal amplitude detection, and energy monitoring. Their ability to accurately capture the effective power of complex waveforms makes them indispensable in modern electronics, including communication systems, industrial automation, and renewable energy management.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Linear RMS-to-DC	High linearity, low noise, and wide bandwidth	RF power measurement, audio signal processing
Dynamic Range Optimized	Supports 60dB+ input range, automatic scaling	Wireless base stations, radar systems
Multi-Channel	Simultaneous conversion of multiple signals	3-phase power monitoring, MIMO systems
Precision Low-Power	0.1% accuracy, sub-10 A quiescent current	IoT sensors, battery-powered instruments

3. Structure and Composition

A typical RMS-to-DC converter IC consists of:

Input Buffer: Impedance matching and signal conditioning
Squaring Circuit: Computes instantaneous square of input signal
Low-Pass Filter: Averages squared signal to extract RMS value
Output Amplifier: Scales DC output to desired voltage range
Temperature Compensation Module: Minimizes thermal drift

Available in QFN, TSSOP, or BGA packaging with die-level options for high-density designs.

4. Key Technical Specifications

Parameter	Description
Input Frequency Range	100Hz - 10GHz (varies by architecture)
Conversion Accuracy	0.05% to 1% of reading
Response Time	1 s - 10ms (determines dynamic range)
Supply Voltage	2.7V - 5.5V (single/dual supply options)
Output Voltage Range	0V - 2.5V/5V scalable
Temperature Stability	5ppm/ C typical drift
Power Consumption	100 A - 10mA operating current

5. Application Areas

Telecommunications: 5G massive MIMO beamforming, optical transceivers
Industrial: Smart grid power quality analyzers, motor drive monitoring
Consumer: High-fidelity audio level meters, smart home energy monitors
Automotive: EV battery management systems, radar obstacle detection
Medical: Ultrasound intensity measurement, patient monitoring equipment

6. Leading Manufacturers and Products

Manufacturer	Key Product	Features
Analog Devices	ADL5511	10GHz bandwidth, 0.3dB error, 15ns response
TI (Texas Instruments)	LMH2110	DC-8GHz, 65dB dynamic range, SPI calibration
STMicroelectronics	LTC6983	Time-domain architecture, 0.1% linearity
Maxim Integrated	MAX21100	3-channel, 1MHz bandwidth, 16-bit resolution
NXP Semiconductors	MC33035	Automotive-grade, -40 C to 150 C operation

7. Selection Guidelines

Determine required input frequency range and signal type (AC/RF/pulse)
Evaluate acceptable error margin (e.g., 0.5% for test equipment)
Assess response time requirements for dynamic signals
Select package type based on PCB space and thermal constraints
Consider temperature rating for industrial/military applications
Balance power consumption against system battery life
Verify calibration support (digital compensation features preferred)

8. Industry Trends

Higher Frequencies: Development of mmWave-compatible converters beyond 30GHz
System-on-Chip Integration: Combining RMS conversion with ADCs and DSP cores
AI-Enhanced Calibration: Machine learning algorithms for self-compensation
Wide Bandgap Compatibility: GaN/SiC-based converters for high-power applications
Energy Harvesting: Sub- W RMS detection for IoT edge devices

Market growth driven by 5G deployment and renewable energy monitoring demands, projected CAGR of 8.2% (2023-2030).