Блог компании Supply ROHM Data Converters:A/D Converter,D/A Converter,Audio Converter

Supply ROHM Data Converters:A/D Converter,D/A Converter,Audio Converter

Shenzhen Mingjiada Electronics Co., Ltd. has specialised in the distribution of semiconductor components for nearly thirty years. With comprehensive global supply channels sourcing directly from original manufacturers and a well-established system for maintaining stock of chips, the company has become a renowned supplier of electronic components.

[Mingjiada Electronics’ Exclusive Service Guarantees]

1. Authenticity and Quality Control

All chips are brand new and factory-sealed; we strictly prohibit the sale of refurbished, unsealed or loose new chips, and welcome customers to conduct material inspections and third-party testing.

2. Extensive Inventory Across All Models, Flexible Dispatch

We maintain a stable inventory in our bonded warehouse in Shenzhen, China, enabling rapid dispatch for both small-batch samples and large-scale project procurement; domestic orders are dispatched within 24 hours, with an 8-hour express ‘green channel’ available for urgent projects; overseas customers can benefit from dedicated global logistics services via DHL/FedEx, with end-to-end tracking support.

3. Transparent tiered pricing to reduce costs and improve efficiency

Leveraging our first-tier channel resources and efficient supply chain management, we are able to offer you highly competitive prices.

4. One-stop support covering the entire supply chain

We provide one-stop solutions for all essential components, integrating pre-sales selection, in-sales follow-up and after-sales warranty services to streamline the customer’s procurement process.

I. ROHM A/D Converters (Analogue-to-Digital Converters, ADCs)

Rohm’s A/D converters are designed to accurately convert analogue signals into digital signals, transforming continuous analogue quantities such as temperature, voltage, current, pressure and sound into digital signals that can be recognised, processed and stored by microcontrollers and processors. The products are characterised by high stability, low power consumption and resistance to interference, and are suitable for general-purpose and demanding applications in industrial, automotive and consumer electronics sectors. They are Rohm’s core products in the industrial control and sensor detection fields.

1. Key Technical Features

ROHM’s ADC products primarily utilise a Successive Approximation Register (SAR) architecture, striking a balance between conversion speed and accuracy. The mainstream models feature 12-bit high-precision resolution, covering medium- to high-speed sampling scenarios, whilst offering multiple key advantages. Firstly, they incorporate industrial-grade anti-interference design, making them suitable for complex electromagnetic environments and supporting a wide operating temperature range, thereby meeting the requirements for long-term stable operation in automotive and industrial equipment; secondly, an ultra-low-power architecture that optimises chip power consumption control, making them suitable for battery-powered portable devices and wireless sensing terminals; thirdly, high integration, with a single chip integrating sampling circuits, a reference voltage source and a digital filter module, eliminating the need for numerous external components, thereby simplifying hardware design and reducing overall system costs; fourthly, universal interfaces supporting mainstream communication protocols such as I²C, enabling rapid integration with various host control chips.

2. Key Product Series and Specifications

Rohm’s A/D converter product line focuses on high-precision, general-purpose 12-bit models, covering a range of sampling rates and channel configurations to suit diverse applications:

- BU79100G-LATR: A classic, general-purpose 12-bit single-channel ADC with sampling rates ranging from 0.5 MSPS to 1 MSPS. It offers balanced power consumption and exceptional stability, and is specifically designed for industrial equipment and general-purpose measurement applications. It supports long-term mass production and is suitable for a wide range of standard analogue signal acquisition scenarios.

- BD79124MUF, BD79104FV: 12-bit multi-channel high-precision ADCs utilising compact packaging, balancing high-speed sampling with miniaturisation requirements; suitable for space-constrained portable devices, smart home appliances and small industrial control modules.

- Embedded Integrated ADCs: ROHM’s ML62Q2000 and ML62Q2500 series of 16-bit general-purpose microcontrollers feature built-in 12-bit high-speed successive approximation A/D converters and integrate 14 acquisition channels. By eliminating the need for external ADC chips, they significantly simplify the hardware architecture of battery management systems, energy storage systems and industrial measurement equipment, whilst enhancing sensing and detection accuracy through their high-precision acquisition capabilities.

3. Typical Application Scenarios

ROHM’s A/D converters are widely used across four major sectors: industrial measurement and control, automotive electronics, smart sensing, and home appliance control. In the industrial sector, they are used for the acquisition of operational data such as temperature, pressure, flow rate, voltage and current; in the automotive sector, they are suited to the detection of in-vehicle sensor signals and battery status monitoring; in consumer electronics, they are used for operational status sensing in smart home appliances and signal acquisition in portable devices; and in the new energy sector, they are suited to parameter monitoring in energy storage systems and battery packs, meeting the long-term service requirements of industrial and automotive applications through their high reliability.

II. ROHM D/A Converters (Digital-to-Analogue Converters, DACs)

Rohm’s general-purpose D/A converters convert digital control signals into analogue voltage or current signals, serving as core components for precise equipment control and analogue signal output. Unlike high-end audio DACs, general-purpose DACs prioritise cost-effectiveness, high linearity and low drift, focusing on applications such as industrial control, power supply control and equipment drive, thereby forming a complete closed-loop data conversion system in conjunction with ADCs.

1. Key Technical Features

ROHM’s general-purpose D/A converters utilise a high-precision resistor network architecture, offering excellent linearity and extremely low output error, thereby effectively preventing signal distortion. The chips incorporate built-in output buffer circuits, enhancing load-driving capability and enabling them to directly drive downstream analogue circuits; they support a wide operating voltage range, making them compatible with various power supply systems; whilst maintaining ROHM’s hallmark high stability and long service life, they support continuous operation under low-temperature, high-temperature and high-interference conditions. Furthermore, their compact packaging and minimal peripheral circuitry significantly reduce R&D and mass production costs.

2. Key Products and Suitable Applications

ROHM’s general-purpose DACs primarily feature mainstream resolutions of 8-bit and 12-bit to meet diverse control accuracy requirements. Core products are available in two main forms: integrated within main control chips and as dedicated standalone chips. The ML62Q20xx series of microcontrollers incorporates an 8-bit high-precision D/A converter capable of directly outputting analogue control voltages, making them suitable for applications such as power supply regulation, motor speed control, lighting dimming and analogue compensation control; Standalone DAC chips, on the other hand, are designed for high-precision analogue output applications, offering lower noise and higher linearity to meet the demands of precision industrial control. All general-purpose DACs support precise digital voltage regulation and closed-loop control, delivering stable output signals free from drift, making them suitable for precise regulation in a wide range of automated equipment.

3. Typical Application Scenarios

General-purpose D/A converters are primarily used in industrial automation control, power management and the regulation of smart devices. Applications include voltage stabilisation and regulation in switching power supplies, analogue adjustment of motor speed and torque, precise control of industrial valves, stepless dimming of LED lighting, and compensation and calibration of sensor signals. They serve as core components for achieving refined, digital control in industrial equipment and smart home appliances.

III. ROHM’s Professional Audio Converters

Audio converters constitute the high-end core product line of ROHM’s data converters. Distinct from general-purpose ADCs and DACs, they are specifically optimised for Hi-Fi audio applications. The range comprises two core categories: audio ADCs and audio DACs. Drawing on ROHM’s more than 50 years of experience in audio IC research and development, as well as its proprietary sound quality design technology, these products are characterised by ultra-low distortion, an ultra-high signal-to-noise ratio and natural sound reproduction. They are the benchmark products for high-end audio and audiovisual equipment and professional recording equipment. Among these, the audio DAC is the flagship product, commanding a dominant share of the high-end audiovisual market.

1. Core Technological Advantages

ROHM’s audio converters incorporate the proprietary MUS-IC™ series of audio technologies, offering a number of industry-leading core features. Firstly, they deliver exceptional acoustic parameters, achieving an ultra-high signal-to-noise ratio (SNR) and ultra-low total harmonic distortion (THD+N), far exceeding general industry standards; secondly, customisable sound tuning, with two classic FIR digital filters built-in (Sharp Roll-Off and Slow Roll-Off), allowing users to freely switch between a crisp, transparent sound and a warm, mellow sound to suit different musical genres and individual listening preferences; Thirdly, high-definition audio support, with 32-bit high bit depth and a 768 kHz high sampling rate, compatible with mainstream high-definition audio formats such as PCM and DSD, fully reproducing the details of high-resolution audio sources; Fourthly, proprietary audio processing algorithms, featuring the in-house developed DWA (Data Weighted Average) algorithm and HD Mono mode, which further optimise low-frequency detail and soundstage depth whilst eliminating audio distortion.

2. Analysis of Core Products

ROHM’s high-end audio DACs are primarily 32-bit stereo products, covering two tiers: flagship and high-end mainstream. Their specifications and performance are among the best in the industry:

- BD34301EKV (first-generation MUS-IC™ flagship): An industry-leading 32-bit stereo audio DAC with a typical signal-to-noise ratio of up to 130 dB and total harmonic distortion as low as –115 dB. Thanks to its exceptional low-noise and low-distortion characteristics, it perfectly reproduces the authentic sound quality of classical instruments. Adopted by high-end Hi-Fi audio brands such as LUXMAN, it is suitable for high-end home audio systems and desktop Hi-Fi equipment.

- BD34352EKV (Mainstream High-End Model): A 32-bit stereo DAC with a sampling rate of 768 kHz, offering a signal-to-noise ratio of 126 dB and THD+N of –112 dB. It strikes a balance between high performance and value for money, supports dual filter switching, and is suitable for mid- to high-end audio-visual equipment, portable high-definition players and in-car Hi-Fi systems.

- BD34302EKV (Second-generation MUS-IC™ flagship): A newly upgraded flagship product featuring an optimised DWA distortion suppression algorithm and a new automatic mode switching function that adapts to PCM/DSD formats and different sampling frequencies. Equipped with an HD mono mode, it significantly enhances soundstage spatiality and dynamic range, and is designed for professional-grade recording and high-end audio-visual flagship equipment.

3. Product Categories and Application Scenarios

ROHM’s audio converters are divided into two categories: audio ADCs and audio DACs, with clearly defined roles and complementary application scenarios. Audio ADCs primarily convert analogue vocal and instrumental sounds into high-definition digital audio signals, and are used in voice recorders, professional recording equipment and live streaming audio terminals; Audio DACs are responsible for losslessly converting digital audio files back into analogue sound. They are widely used in high-end Hi-Fi audio systems, in-car high-fidelity audio-visual systems, high-definition televisions, professional audio players and smart home audio-visual devices, serving as the core chips that enable high-end audio-visual products to deliver immersive sound quality.

IV. Summary of Key Differences and Selection Criteria for ROHM’s Three Major Data Converters

ROHM’s three categories of data converters are clearly positioned and distinctly tailored to different application scenarios, allowing for precise selection based on specific requirements: General-purpose A/D converters focus on analogue signal acquisition, prioritising industrial-grade reliability and low power consumption, and are suited to sensor detection and operational condition monitoring applications; General-purpose D/A converters focus on precise analogue signal output control, offering high linearity and low drift, and are suitable for industrial control regulation and power supply control applications; audio converters focus on high-end audio-visual signal conversion, prioritising ultra-low distortion and high-fidelity sound reproduction, and are customised specifically for Hi-Fi and high-definition audio applications.