NXP Semiconductors MPX2301DT1

Overview

MPX2301DT1 from Freescale Semiconductor is a miniature, differential pressure sensor with 0–40 kPa full-scale range, integrated thin-film temperature compensation and calibration, ratiometric output, and ISO 10993-compliant polysulfone housing. It delivers 5.0 μV/V/mmHg sensitivity, ±1.5% VFSS linearity + hysteresis, and 1.0 ms response time for invasive medical pressure monitoring applications.

For engineers reviewing the MPX2301DT1 datasheet, MPX2301DT1 pinout, MPX2301DT1 application, or MPX2301DT1 equivalent, key selection criteria include biocompatible packaging, defibrillation-safe gel isolation, ratiometric supply dependency (6 V ±0.2 V), low zero-offset drift (±9.0 μV/°C), and Chip Pak package compatibility with disposable medical sub-modules.

Technical Context

The MPX2301DT1 employs piezoresistive silicon sensing element with backside pressure input and front-side exposed die/wire bonds requiring customer-provided mechanical protection. Its on-chip thin-film compensation circuitry corrects for temperature-induced sensitivity and offset drift across +15°C to +40°C operating range.

Output is fully differential (VOUT+, VOUT–) with 270–330 Ω output impedance and 1800–4500 Ω input impedance, referenced to a 6 V regulated supply. The device exhibits ratiometric behavior - output voltage scales linearly with supply voltage - and supports RCAL-based offset calibration using a 150 kΩ resistor.

Key Specifications

Pinout & Package

MPX2301DT1 uses the Chip Pak package (Case 98ASB13355C), a surface-mount, biocompatible module with 4-terminal configuration and backside pressure port. Dimensions: 6.10–6.60 mm × 8.89–9.40 mm × 3.56–3.81 mm (L×W×H).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential pressure sensing applications.

Compared with MPX2301DT1, the MPXV5004DP offers wider pressure range but lacks medical qualification and differential output, while the MS5837-02BA provides digital precision and ruggedness but removes analog ratiometric operation and biocompatible integration - making MPX2301DT1 uniquely suited for disposable, sterilizable, analog-front-end medical transducers.

Availability

MPX2301DT1 is available at Aetrix Electronics and suitable for infusion pump pressure monitoring, blood pressure transducer assembly, and pressure catheter tip sensing requiring stable component supply, traceable sourcing, and lifecycle continuity for FDA-regulated medical device manufacturing.

Supply support for MPX2301DT1 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

Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in embedded processing, sensors, and automotive ICs, with deep expertise in medical and industrial analog signal conditioning.

The MPX2301DT1 belongs to Freescale's MPX2300 series of compensated pressure sensors, engineered specifically for disposable, biocompatible, invasive medical applications requiring regulatory compliance, sterilizability, and high signal integrity in noisy clinical environments.

FAQ

What is the pressure port orientation and mechanical interface requirement for MPX2301DT1?

The MPX2301DT1 applies pressure to the backside of the Chip Pak package - the side opposite the printed markings and pins. The front side contains exposed die and wire bonds that must be protected by the customer's housing. A compliant medical-grade gel layer transmits pressure uniformly to the diaphragm while electrically isolating connections from saline or other fluids. Proper sealing against the backside port is essential to prevent leakage and ensure accurate differential measurement in MPX2301DT1 installations.

Does MPX2301DT1 require external calibration components?

No, the MPX2301DT1 integrates thin-film temperature compensation and factory calibration, eliminating the need for external trim pots or calibration ICs. However, RCAL-based offset verification is supported using a 150 kΩ resistor between VS and VOUT+ to confirm zero-pressure output alignment. This optional check aids production test but does not replace the internal calibration - the MPX2301DT1 delivers calibrated output directly from the pins under specified supply and temperature conditions.

Can MPX2301DT1 be sterilized, and which methods are validated?

Yes, MPX2301DT1 is validated for ethylene oxide (EtO) sterilization, consistent with its ISO 10993-compliant polysulfone housing and USP Class V silicone gel. Autoclaving and gamma irradiation are not recommended, as they may degrade the gel or housing material. The device's biocompatibility testing covers ISO 10993-5 (cytotoxicity), -10 (irritation/sensitization), and -11 (hemolysis), confirming suitability for short-term invasive use in MPX2301DT1-based transducers.

What is the meaning of "ratiometric" in MPX2301DT1 specifications?

"Ratiometric" means the MPX2301DT1's output voltage scales proportionally with its supply voltage (VS). For example, at 6.0 V supply, full-scale output is ~3.0 mV; at 5.9 V, it drops to ~2.95 mV. This behavior allows the same reference voltage used for VS to also serve as the ADC reference, canceling supply-induced errors. Designers must regulate VS tightly (±0.2 V) because unregulated supplies introduce direct gain error into the MPX2301DT1 measurement chain.

Is MPX2301DT1 pin-compatible with other devices in the MPX2300 family?

Yes, MPX2301DT1 shares identical pinout (VS, VOUT+, VOUT–, GND), package (Case 98ASB13355C), and footprint with MPX2300DT1 and MPX2302DT1. Differences lie solely in pressure range (MPX2300DT1: 0–20 kPa; MPX2301DT1: 0–40 kPa; MPX2302DT1: 0–100 kPa) and corresponding sensitivity/offset calibration. This allows hardware reuse across variants - a single PCB layout can support multiple MPX2300-series sensors by selecting the appropriate MPX2301DT1 variant during assembly.