company blog about Recycle MPS Data Converters: Delta-Sigma ADC, SAR ADC, Integrated ADC+DAC

Recycle MPS Data Converters: Delta-Sigma ADC, SAR ADC, Integrated ADC+DAC

Shenzhen Mingjiada Electronics Co., Ltd. is a renowned specialist in the global electronic components recycling industry, specialising in the recycling of all types of electronic components. We purchase 5G chips, new energy ICs, IoT ICs, Bluetooth ICs, V2X ICs, automotive-grade ICs, communications ICs, AI ICs, memory ICs, sensor ICs, microcontroller ICs, transceiver ICs, Ethernet ICs, Wi-Fi chips, wireless communication modules, connectors and other products at highly competitive prices.

Recycling Details:

1. We recycle electronic materials, idle stock, factory stock, electronic stock and personal stock, amongst others.

2. With our strong financial standing and extensive experience in recycling, we provide an efficient door-to-door collection service.

3. We offer our clients a variety of stock management solutions to choose from. We can either purchase large quantities of stock in a single transaction or provide consignment services.

4. We uphold integrity, honour our commitments and value our reputation; whilst ensuring fair and reasonable recycling prices alongside professional and convenient service.

Recycling Process:

If you have idle electronic components that need to be disposed of, please send an inventory list of the integrated circuits (ICs) or modules you wish to sell to our email address. We will dispatch specialists to your premises to conduct an initial inspection and sorting of the components, and provide a quotation based on factors such as the type, quantity and quality of the components to be recycled. Once an agreement has been reached, we can negotiate the specific terms of delivery and transaction.

Mingjiada Electronics is committed to helping customers reduce inventory, save storage space and lower warehousing and management costs by providing high-quality recycling services. Furthermore, we continuously monitor the latest trends and technological developments in the electronics industry to ensure our recycling services remain aligned with market demands.

MPS’s data converters comprise Delta-Sigma (ΔΣ) ADCs designed for high-channel-count, low-noise current-input imaging; high-speed SAR ADCs for general-purpose data acquisition; and integrated ADC+DACs that combine analogue inputs and outputs on a single chip. The positioning of these three product lines is clearly distinct: one focuses on ‘channel density and noise’, one on ‘speed and form factor’, and one on ‘bidirectional conversion required for closed-loop control’.

I. Delta-Sigma ADCs: Combining current-to-voltage conversion and analogue-to-digital conversion on a single chip

MPS’s ΔΣ ADCs utilise a current-input architecture rather than a voltage-input one, making them more suitable for low-level current-output devices such as photodiode arrays. The devices perform both current-to-voltage (I/V) conversion and A/D conversion within a single package; each channel features a selectable-gain integrator, requiring only a single external integrating capacitor and virtually no additional front-end circuitry. Consequently, its primary applications lie in the digitisation of photodiode arrays used in industrial X-ray, computed tomography (CT), baggage security screening and industrial non-destructive testing (NDT), making it suitable for industrial X-ray and CT imaging systems, as well as baggage security and non-destructive testing equipment.

The MDC91128 is a representative model in this series, featuring 128 channels, 20-bit resolution (configurable to 16 bits), a sampling rate of 6 ksps, and an input range of 4 pC to 25 pC. At the 25 pC range with a sensor capacitance of 20 pF, the RMS noise is as low as 20 ppm; with integral non-linearity of ±0.025 per cent in the 4 pC range, and an integral time adjustable between 166 μs and 0.1 s. A 32×128-word sampling data buffer is integrated on-chip; combined with dual serial interfaces and a daisy-chain topology, this enables expansion to imaging systems with over 128 channels. The supply voltage is 5 V for analogue and 1.8 V for digital; the system clock is 40 MHz; the operating temperature range is –40 °C to +85 °C; and it is housed in a BGA-440 package.

The MDC91127 is the 16-bit version based on the same architecture; it also features 128 channels, 6 ksps, an input range of 4 pC to 25 pC, and an RMS noise of 44 ppm. With the same buffer depth and daisy-chain capability, it is suitable for applications where absolute resolution is not a primary requirement, but where cost and data throughput are more critical. It forms a complementary pair with the MDC91128 at the same board level, with the front-end circuits being directly interchangeable.

The MDC91256 increases the number of channels to 256, with 20-bit (configurable to 16-bit) resolution, 6 ksps, a 4pC to 25pC input range, and an RMS noise of 20 ppm. The on-chip buffer has been expanded to 32 × 256 words, the interface has been changed to four serial channels, and it is packaged in a BGA-783. This model is currently in the pre-release stage and is aimed at CT and high-end security screening platforms requiring higher resolution and larger arrays.

II. SAR ADCs: Three Models with 1 Msps, SOT-23-6 and Zero Pipeline Latency

The SAR series takes a different approach: offering 8- to 12-bit resolution, up to 1 Msps throughput, zero pipeline latency and no software maintenance, all housed in a standard 6-pin TSOT-23-6 package that occupies minimal board space. The three models share the same pinout and SPI timing; they differ only in resolution, allowing for product series selection based on accuracy without the need for board modifications. They are suitable for industrial process control, instrumentation, data acquisition systems, portable instruments, and power supply and system status monitoring.

The MDC97476 is the 12-bit variant, featuring a 1 Msps conversion rate and a single 3 V to 3.6 V power supply. Power consumption is as low as 4.3 mW at 3.3 V and 1 Msps, an SNR of 72 dB at a 120 kHz input (72.2 dB as specified in the data sheet), an INL of 0.5 LSB, a reference voltage derived directly from the power supply, and a three-wire SPI interface for control and data output. The sampling rate is determined by the serial clock, whilst conversion and acquisition are controlled by the chip select pin.

The MDC97477 is a 10-bit model, also featuring 1 Msps, single-ended input and an SPI interface, with an SNR of 61.7 dB and an INL of 0.15 LSB; it is suitable for applications requiring moderate accuracy whilst retaining 1 Msps sampling capability.

The MDC97478 is an 8-bit model operating at 1 Msps, with an SNR of 50 dB and an INL of 0.04 LSB. It is intended for applications requiring only coarse quantisation but where speed and cost are the primary considerations, such as power supply status monitoring and simple threshold detection.

III. Integrated ADC+DAC: Bidirectional analogue front-ends such as the MP5494

Integrated ADC+DACs represent the most distinctive category within MPS’s range of data converters: they employ a closed-loop architecture comprising ‘multi-channel ADCs coupled with multi-channel DACs’, typically used in optical modules and photonic control applications, rather than being designed solely to ‘convert a single signal’. The device utilises an ultra-compact WLCSP package, integrating voltage sources, current sources, multi-function I/O and a monitoring ADC all onto a single chip.

The MP5494 is the current model in this category, positioned as a high-precision, highly integrated analogue front-end for photonic control. It integrates four 12-bit current sources (IDACs), each capable of delivering up to 300 mA per channel. It supports channel parallel mode, enabling a total current of up to 1,200 mA when paralleled, with each channel featuring an independent EN pin for rapid switching. The voltage drop is only 120 mV at 200 mA, making it suitable for direct laser diode driving. It also features a 12-channel, 12-bit voltage source (VDAC) with a selectable output range of 0 V to 2.5 V or 0 V to 5 V, capable of ±30 mA sink and source currents, for heater bias. The 12-channel multifunction I/O can monitor the current of photodetectors (MPDs), supports both pull-up and pull-down modes, and allows configuration of pins to adjust the voltage. The chip incorporates a 12-bit ADC capable of sequentially monitoring the current or voltage of the 12-channel multifunction I/O, the voltage inputs of ADC1 to ADC6, the voltages of IDAC1 to IDAC4, and four power supply voltages, providing a total monitoring capability of 18 channels.

The digital side provides two interfaces: 1 MHz I²C (with seven selectable slave addresses) and 10 MHz SPI. It operates at voltages ranging from 2.9 V to 5.5 V and is housed in a WLCSP-56 (3.6 mm × 3.5 mm) package, requiring very few external components. This model is currently a pre-release product, available in the MP5494GC-xxxx-Z and MP5494GC-xxxx-P series.