STMicroelectronics RHF1201KSO1

Overview

RHF1201KSO1 from STMicroelectronics is a radiation-hardened 12-bit, 50 Msps analog-to-digital converter (ADC) designed for high-reliability space and nuclear environments. It features a pipeline architecture with digital error correction, 300 kRad(Si) TID tolerance, SEFI/SEL immunity up to 120 MeV·cm²/mg, Optimwatt™ adaptive power (44 mW at 0.5 Msps, 100 mW at 50 Msps), and 2 Vpp differential input optimization - deployed in digital communication satellites and aerospace instrumentation.

For engineers reviewing the RHF1201KSO1 datasheet, RHF1201KSO1 pinout, RHF1201KSO1 application, or RHF1201KSO1 equivalent, key selection criteria include rad-hard qualification (QML-V SMD 5962-05217), SFDR ≥75 dBc at 15 MHz input, tri-state digital outputs, internal reference with external bias capability, and SO48 hermetic ceramic package compatibility with IF-sampling up to 150 MHz.

Technical Context

The RHF1201 implements a multi-stage pipeline ADC architecture with on-chip digital error correction to ensure ±1.7 LSB INL and ±0.5 LSB DNL across full temperature and radiation exposure. Its proprietary track-and-hold supports wideband analog inputs up to 150 MHz while maintaining ENOB ≥9.7 bits at 15 MHz.

It integrates dual-mode reference handling (internal VREFP/VREFM or external bias), programmable slew rate control (SRC), data format selection (DFSB), and output enable (OEB) for bus sharing. Clock input is 2.5 V CMOS-compatible with 4–6 ns data output delay and 5.5-cycle pipeline latency synchronized to clock falling edge.

Key Specifications

Pinout & Package

Ceramic SO48 hermetic package (48-pin, 15.24 mm × 15.24 mm, 1.27 mm pitch); upper metallic lid is electrically isolated from die and pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar radiation-hardened ADC applications.

Compared with AD9266-EP and ISLA216P50, the RHF1201KSO1 uniquely balances 12-bit performance, 50 Msps speed, full QML-V flight certification, and 300 kRad(Si)/120 MeV·cm²/mg hardness - making it the sole option for production spaceborne IF-sampling systems requiring zero-failure reliability.

Availability

RHF1201KSO1 is available at Aetrix Electronics and suitable for digital communication satellites, space data acquisition systems, and aerospace instrumentation requiring stable component supply across extended mission lifetimes and radiation-exposed deployments.

Supply support for RHF1201KSO1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader specializing in high-reliability, radiation-hardened analog and mixed-signal ICs for aerospace, defense, and nuclear applications.

The RHF1201 belongs to ST's Rad-Hard Data Converters product line, engineered specifically for space-grade signal digitization where TID tolerance, single-event immunity, and hermetic packaging are non-negotiable design requirements.

FAQ

What is the maximum analog input frequency supported by the RHF1201KSO1?

The RHF1201KSO1 supports analog input frequencies up to 150 MHz in IF-sampling configurations, validated by its 95 MHz effective resolution bandwidth and maintained SFDR performance at Fin = 145 MHz (−57 dBc). This capability stems from its optimized track-and-hold and pipeline architecture, enabling undersampling of bandpass signals without aliasing-induced distortion.

How does the Optimwatt™ power adaptation work in practice?

Optimwatt™ adjusts analog core current via an external resistor (Rpol) connected between IPOL and AGND. At 0.5 Msps, Rpol ≈ 200 kΩ yields 44 mW; at 50 Msps, Rpol ≈ 20 kΩ achieves 100 mW. The relationship is monotonic and calibrated - changing Rpol outside the recommended range degrades ENOB by ≥0.2 dB or increases THD significantly.

Can the RHF1201KSO1 operate with external voltage references?

Yes - VREFP and VREFM pins accept externally sourced references within −0.6 V to AVCC+0.6 V (max 1.4 V for VREFP, 0.5 V for VREFM). External biasing requires adherence to Table 4 constraints and impacts INCM dependency; internal reference remains active unless VREFP is driven above 1.16 V, disabling the internal generator.

Is the SO48 package lead-free and RoHS-compliant?

The RHF1201KSO1 uses a gold-plated lead finish in its ceramic SO48 hermetic package, meeting MIL-STD-883 Class V requirements. While not RoHS-compliant due to gold plating and military-grade construction, it satisfies ESA ESCC 22900 and NASA EEE-INST-002 standards for space-qualified components.