company blog about Supply/Recycle ST Aerospace-Grade Radiation-Hardened ADC—LEOAD128P-D 8-Channel 1 Msps 12-Bit Converter

Shenzhen Mingjiada — Supplier and Recycler of ST Aerospace-Grade Radiation-Hardened ADCs — LEOAD128P-D 8-Channel 1 Msps 12-Bit Converter

ST (STMicroelectronics) has introduced the LEOAD128P-D, a low-power, multiplexed 8-channel pure CMOS 12-bit analog-to-digital converter (ADC) supporting conversion rates from 50 ksps to 1 Msps. The device’s architecture is based on a successive approximation register with an internal tracking hold function. The output serial data is in pure binary format and is SPI™-compatible.

The analog and digital supply voltage range is 2.7 V to 3.6 V, with a maximum power consumption of only 2 mA.

The LEOAD128P-D operates over a wide temperature range of -40 °C to +125 °C and is housed in a 20-pin plastic TSSOP-20 thin-walled, tapered small outline package with gold solder and nickel/palladium/gold pin plating to prevent whisker formation.

The LEOAD128P-D complies with the ST-LEO specification, a dedicated standard for space-grade radiation-hardened plastic products. This AEC-Q100-based specification strikes a specific balance between package size savings, cost of ownership, and quality assurance versus radiation hardening capabilities and high-volume production capacity.

1. Key Technical Features

The LEOAD128P-D is a low-power, multi-channel, pure CMOS 12-bit analog-to-digital converter optimized for applications with sampling rates ranging from 50 ksps to 1 Msps.

High-performance SAR architecture: Based on a successive approximation register (SAR) architecture with built-in tracking and hold circuitry to ensure accurate sampling and conversion.

8-Channel Inputs: An integrated 8-to-1 channel multiplexer allows flexible switching between multiple analog signal sources, simplifying system design.

Low-Power Design: With a maximum current consumption of only 2 mA at a 3.3V operating voltage, it is ideally suited for the stringent power consumption requirements of spacecraft.

SPI-Compatible Interface: The serial digital output is compatible with the SPI bus, facilitating easy connection to various microcontrollers and FPGAs.

Power-down function: Supports power-down mode to further reduce system standby power consumption.

2. Space-grade radiation-hardened design

The core value of the LEOAD128P-D lies in its radiation-hardened capabilities, tailored specifically for space missions:

Total Ionizing Dose (TID): Withstands up to 50 krad(Si), meeting the radiation environment requirements for Low Earth Orbit (LEO) and certain Medium Earth Orbit (MEO) missions.

Single-Event Latch-Up (SEL) Immunity: Design-verified immunity to heavy ions with energies up to 62.5 MeV·cm²/mg, ensuring no destructive failures occur under cosmic ray bombardment.

ST LEO Specification: Complies with ST’s LEO specification for radiation-hardened plastic products designed for aerospace applications. This specification is based on the AEC-Q100 automotive standard and achieves an optimized balance between radiation hardening, high-volume supply capability, quality assurance, and cost control.

3. High-Reliability Packaging

Advantages of Plastic Packaging: Utilizes TSSOP-20 plastic packaging, offering the advantages of smaller size, lighter weight (only 80 mg), and lower cost compared to traditional ceramic packaging.

Whisker-Free Process: Utilizes a nickel/palladium/gold (NiPdAu) lead surface treatment and gold wire bonding process to completely eliminate the risk of whisker growth, ensuring long-term reliability in aerospace applications.

Low Outgassing Characteristics: Strictly controlled material outgassing rates (RML < 1%, CVCM < 0.1%) meet the stringent requirements for material volatiles in hermetically sealed aerospace electronic equipment.

4. Typical Applications

The LEOAD128P-D is widely used in the following aerospace and high-reliability fields:

- Commercial Space: Low-Earth orbit satellites, on-board telemetry and control, satellite sensor data acquisition

- Space Payloads: Space exploration equipment, on-board communication modules, space telemetry and control systems

- Radiation-Hardened Industrial Control: Nuclear industry monitoring, high-energy physics equipment, data acquisition in extreme environments

- High-Reliability Instruments: Aerospace-grade test instruments, military telemetry and control, precision data acquisition systems

Mingjiada Electronics’ Dual-Track Business Advantages

Supply of brand-new, genuine, in-stock products

- Authorized aerospace-grade component channels; 100% brand-new and genuine; strict quality inspection and traceability; no refurbished or loose parts;

- Ample in-stock inventory; eliminates the pain points of shortages and long lead times for high-end aerospace ADCs; same-day express shipping for small batches;

- Supports sample requests, small-batch trial production, and large-volume long-term supply, catering to both aerospace project R&D and mass production.

High-Priced Buyback of Obsolete Inventory

- We offer long-term, high-value buyback services for LEOAD128P-D and other aerospace-grade radiation-hardened components; accepts new, stock, and refurbished parts;

- Professional valuation and pricing, cash settlement, and transparent processes to help customers quickly recover funds and clear out idle inventory;

- Compliant material disposal that protects customer intellectual property and project confidentiality, meeting the confidentiality requirements of aerospace organizations.

Mingjiada Electronics Reminder: The LEOAD128P-D is a scarce aerospace-grade radiation-hardened ADC with limited stock on hand. We welcome inquiries to secure your supply. We also offer high-value buyback services for idle components of the same model from aerospace research institutes and solution providers, providing a one-stop supply and buyback service to build a reliable aerospace component supply chain partnership.