company blog about Recycle ROHM Data Converter:A/D Converter,D/A Converter,Audio Converter

Recycle ROHM Data Converter:A/D Converter,D/A Converter,Audio Converter

Shenzhen Mingjiada Electronics has specialised in the recycling of original integrated circuits (ICs) for over twenty years. Headquartered in Shenzhen, the company serves the global market, offering long-term, high-value cash-on-delivery recycling services for a wide range of electronic components and chips. We provide centralised procurement services for corporate clients, component distributors, factories with slow-moving stock, trade surplus stock and clearance stock. Whether the components are brand-new from the original manufacturer, new in bulk or refurbished, we can provide quotations and help clients realise the value of their surplus stock and quickly recover working capital through a one-stop solution.

[Key Advantages of Our Recycling Service]

1. Highly competitive pricing: We closely monitor market trends set by original manufacturers and offer high-value cash payments.

Leveraging our global semiconductor supply chain network, we monitor market prices in real time. We prioritise high-value purchases for factory-sealed, full-reel products; simultaneously, we provide fair valuations for loose components, reel-mounted packages and bare chips, ensuring there is no unfair price suppression. For components of the same model and condition, our quotes exceed industry standards, and we offer on-site price negotiation for bulk transactions.

2. Flexible settlement: Multiple payment methods, rapid payment

We support on-site cash settlement, corporate bank transfers and advance deposits. For small parcels, payment is made immediately upon inspection and signature; for large volumes of factory stock, we can arrange on-site inspection and settlement. We also offer consignment and commissioned sales arrangements, allowing you to choose the monetisation solution that best suits your needs.

3. Global Collection: Multi-warehouse network, hassle-free logistics

Items can be received simultaneously at our Shenzhen headquarters and Hong Kong warehouse. We handle both domestic and international shipping. For customers outside these regions, we support the dispatch of insured samples via SF Express or DHL; shipping costs are negotiable. We strictly adhere to relevant regulations and source exclusively from legitimate factories and authorised dealers’ stock to ensure safe and reliable transactions.

[Recycling Partnership Process]

Enquiry and Quotation: The client provides a list (model, quantity, year of manufacture, packaging, condition and photographs of the items); an accurate quotation is issued within 1–4 hours;

Sample Verification: Small items may be sent for testing; for bulk consignments, an appointment can be made for Mingjiada staff to visit the premises to conduct a physical inventory and inspection;

Contract Signing and Transaction: Both parties confirm the price and sign the formal recycling purchase and sale documents;

Dispatch and Settlement: Full payment is arranged immediately upon receipt and inspection of the customer’s goods.

I. A/D Converters (ADCs): 12-bit Successive Approximation Type – The Industrial-Grade Choice for Precise Sampling

ROHM’s A/D converters feature 12-bit resolution as their primary accuracy grade and uniformly adopt the **Successive Approximation Register (SAR) architecture**. This architecture strikes an excellent balance between power consumption, conversion speed and linearity, making it particularly suitable for power-sensitive applications such as sensor signal acquisition, industrial measurement and automotive systems.

Flagship Model: BU79100G-LA

The BU79100G-LA is ROHM’s current flagship general-purpose 12-bit single-channel A/D converter, housed in an ultra-compact SSOP6 package, making it ideal for space-constrained embedded designs. The device supports sampling rates ranging from 0.5 to 1 MSPS and communicates with the host via an SPI serial interface; its single-channel design simplifies the front-end analogue signal chain. Its wide supply voltage range enables it to be directly adapted to a variety of system supply rails, delivering excellent performance in both battery-powered devices and industrial transmitters. ROHM provides a matching evaluation board, the BU79100G-LA-EVK-001, to facilitate rapid prototype verification by engineers.

Core Model: BD79104FV-LAE2

The BD79104FV-LAE2 is also a 12-bit ADC, housed in a 16-pin SSOP-B package. Its channel configuration and level of peripheral integration make it particularly suitable for systems of medium complexity requiring a multi-pin layout. This device continues ROHM’s tradition of low-power SAR-type ADCs and is designed to meet the multi-channel signal acquisition requirements of the automotive and industrial sectors.

ROHM’s A/D converter product line as a whole emphasises high-precision sensor measurement compatibility; its 12-bit SAR core is also integrated as IP within the ML62Q series of MCUs, with a minimum conversion time of the microsecond range, demonstrating ROHM’s expertise in the协同设计 of analogue front-ends and digital control.

II. Digital-to-Analogue Converters (DACs): Powerful Tools for Multi-Channel Electronic Adjustment, with Stable Output via R-2R Architecture

ROHM’s general-purpose DACs are primarily positioned for electronic adjustment applications, i.e. the precise setting of analogue voltages or currents via a digital interface within a system, for use in scenarios such as contrast adjustment, offset calibration, gain setting and LED brightness control. Based on an R-2R ladder resistor network architecture, this series offers resolutions of 8-bit and 10-bit, with channel counts flexibly configurable from 2 to 12 channels. The interfaces support three mainstream protocols: I²C (2-wire serial), SPI (CSB mode) and 3-wire serial (LD mode).

8-bit multi-channel series: BH2221FV and BH2223FV

The BH2221FV-E2 is an 8-bit, 12-channel D/A converter housed in an SSOP-B20 package. It integrates 12 independent DAC outputs onto a single chip, significantly reducing the number of components and PCB area required in applications where multiple offset adjustments are needed (such as multi-channel sensor calibration or multi-channel voltage setting for display panels). The device operates within a supply voltage range of 2.7 V to 5.5 V, with a settling time of just 100 µs, a maximum data transfer rate of 10 MHz, integral non-linearity (INL) of ±1.5 LSB, differential non-linearity (DNL) of ±1.0 LSB, an output current capability of ±1.0 mA, and an operating temperature range of –30 °C to 85 °C.

The BH2223FV-E2, on the other hand, offers 10-bit resolution in a 10-channel configuration, also utilising an SSOP-B16 package and an LD (3-wire serial) interface. Compared to the 8-bit products, the 10-bit resolution offers clear advantages in applications requiring finer step adjustments; current consumption is approximately 1.6 mA, whilst linearity specifications remain consistent with those of the BH2221FV.

8-bit, low-channel-count series: BH2226FV, BH2219FVM and BH2220FVM

For applications requiring fewer channels, ROHM offers more compact options. The BH2226FV is an 8-bit DAC featuring an SSOP-B16 package and an SPI (CSB) interface, with a current consumption as low as 1.1 mA, making it suitable for power-sensitive portable devices. The BH2219FVM-TR is an 8-bit, 2-channel device housed in an 8-pin VSSOP ultra-small package, with a current consumption of just 0.6 mA; the BH2220FVM is the 8-bit, 3-channel version. Both of these low-channel-count devices also feature a 100 µs settling time and a 10 MHz data transfer rate, making them highly competitive in miniaturised control circuits.

A common feature of ROHM’s general-purpose D/A converters is their CMOS-level inputs, low power consumption and fast settling time. All models support a wide operating voltage range of 2.7 V to 5.5 V, enabling seamless integration into 3.3 V and 5 V systems, making them a cost-effective choice for electronic adjustment applications.

III. Audio Converters: The MUS-IC™ Brand Leads the Way in High-Fidelity Audio Reproduction

ROHM’s core brand in the field of audio converters is MUS-IC™. This series specialises in 32-bit high-resolution audio D/A conversion and, through ROHM’s proprietary sound quality design technology, achieves high-end Hi-Fi audio standards in key metrics such as signal-to-noise ratio (SNR), total harmonic distortion plus noise (THD+N) and dynamic range. The MUS-IC™ series not only comprises DAC chips but also extends to audio power management ICs, forming a complete high-fidelity audio solution.

MUS-IC™: BD34301EKV

The BD34301EKV-E2 is a 32-bit stereo D/A converter in the MUS-IC™ series, supporting a maximum sampling rate of 768 kHz, with input interfaces compatible with I²S and DSD (supporting four DSD clock rates: 2.8 MHz, 5.6 MHz, 11.2 MHz and 22.5 MHz). The device delivers outstanding performance with an SNR of 130 dB (typical) and THD+N of –115 dB (typical), whilst also achieving a dynamic range of 130 dB. The digital filter offers three modes—preset, custom and external—allowing users to switch flexibly according to their listening preferences. It is housed in an HTQFP64BV package (12.0 mm × 12.0 mm × 1.0 mm), with a digital core supply voltage (DVDD) of 1.4 V to 1.6 V and an I/O supply voltage (DVDDIO) of 3.0 V to 3.6 V, operating within a temperature range of –25 °C to 85 °C.

Cost-effective audio DAC: BD34352EKV

The BD34352EKV-E2 is a 32-bit stereo D/A converter launched by ROHM for the high-end audio market, which also supports 768 kHz sampling and dual I²S/DSD inputs. It features an SNR of 126 dB (typ.), THD+N of –112 dB (typ.) and a dynamic range of 126 dB. The device incorporates two switchable digital FIR filters—Sharp Roll-Off and Slow Roll-Off—allowing users to select different frequency response characteristics according to music genre and personal listening preferences. The BD34352EKV employs a current-output architecture, providing greater design flexibility for downstream analogue filtering and amplification circuits. It is housed in an HTQFP64BV package and operates within a temperature range of –25°C to 85°C.

Audio CODEC: BU26154MUV-E2

In applications requiring both recording and playback functionality, the BU26154MUV-E2 provides a mono audio CODEC solution, integrating one ADC and two DACs with a maximum sampling rate of 48 kSPS. Housed in a VQFN-V package and operating within a temperature range of –20°C to 85°C, it is suitable for consumer audio products requiring high integration, such as Bluetooth speakers, in-car hands-free systems and voice interaction terminals.

ROHM’s overall design philosophy for audio converters is to extract as much information as possible from the audio source. Through proprietary sound quality design technology, it reproduces the natural ‘texture’ of musical instruments, striving for an authentic listening experience across the three key elements of spatial reverberation, silence and dynamic range.

Key Technical Advantages of ROHM’s Data Converters

1. Automotive-grade reliability: The BD79xxx series is AEC-Q100 certified, features a wide operating temperature range suitable for harsh environments from -40°C to 125°C, and maintains INL accuracy within ±1.2 LSB.

2. Low-power design: The general-purpose DAC series consumes as little as 0.6 mA (BH2219FVM), whilst the ADC series supports wide-voltage operation, making it suitable for battery-powered and portable devices.

3. MUS-IC™ sound quality technology: ROHM’s proprietary sound quality design delivers industry-leading performance with a 130 dB SNR and –117 dB THD+N; the second-generation HD mono mode further pushes the boundaries of auditory perception.

4. Multi-channel high integration: DAC channel counts range from 2 to 12, whilst ADC channel counts range from 1 to 8; single-chip integration reduces the number of system components and PCB area.

5. Flexible Interface Configuration: Multiple interfaces including SPI, QSPI, I²C, I²S and DSD; supports dual power domains of 3.3V and 5V; independent I/O power supply design facilitates interfacing with various MCUs.

6. Power-On Safety Design: The general-purpose DAC features a built-in RESET function, ensuring that all channels output a low level upon power-up to prevent accidental system triggering.