NXP Semiconductors MPX5700A

Overview

MPX5700A from NXP Semiconductors (formerly Freescale) is an integrated silicon piezoresistive pressure sensor with on-chip signal conditioning, temperature compensation, and factory calibration for absolute pressure measurement. It delivers a ratiometric 0.2–4.7 V analog output over a 0–700 kPa range, operates from 4.75–5.25 V supply, draws ≤10 mA, and maintains ±2.5% full-scale accuracy across –40°C to +125°C. It is used in automotive HVAC, industrial process monitoring, and medical pneumatic systems.

For engineers reviewing the MPX5700A datasheet, MPX5700A pinout, MPX5700A application, or MPX5700A equivalent, key selection criteria include its absolute pressure configuration, Case 867-08 unibody epoxy package, 6-pin SMT-compatible leadform, 1 ms response time, and compatibility with microcontroller A/D interfaces requiring stable, calibrated analog pressure input.

Technical Context

The MPX5700A integrates a micromachined silicon diaphragm with thin-film piezoresistors, bipolar signal conditioning circuitry, and two-stage gain amplification with offset trimming. Its transfer function is V_OUT = V_S × (0.0012858 × P + 0.04), where V_S = 5.0 V and P is pressure in kPa - enabling direct ratiometric interpretation without external scaling.

On-chip temperature compensation corrects both offset (T_COffset) and full-scale span (T_CSpan) drift over 0–85°C, while fluorosilicone gel isolates the die from media exposure. The device requires no external zero or span adjustment and is qualified for operation up to 2800 kPa maximum pressure (P1) with P2 ≤ 500 kPa.

Key Specifications

Pinout & Package

MPX5700A uses the Case 867-08 unibody epoxy package: 16.00 × 13.56 × 5.59 mm, 6-pin surface-mount leadform with stainless steel cap on the P1 (positive pressure) side. Pin 1 is V_OUT, Pin 2 is GND, Pin 3 is V_CC; Pins 4–6 are no-connects per datasheet Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPX5700AP and MPX5999, the MPX5700A provides optimal balance of accuracy, size, and SMT compatibility for mid-range absolute pressure applications below 700 kPa and +125°C, with lower unit cost and simpler layout integration than either alternative.

Availability

MPX5700A is available at Aetrix Electronics and suitable for automotive HVAC control, industrial process monitoring, and medical pneumatic systems requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for MPX5700A 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in sensor and analog IC design.

The MPX5700 series belongs to NXP's Xtrinsic™ intelligent sensor portfolio, engineered specifically for embedded pressure measurement in harsh environments where reliability, calibration stability, and analog interface simplicity are critical.

FAQ

What is the pressure type supported by the MPX5700A?

The MPX5700A is an absolute pressure sensor, meaning it measures pressure relative to a sealed vacuum reference inside the package. Its specified range is 0–700 kPa absolute, making it suitable for barometric sensing, sealed-system monitoring, and vacuum detection applications where atmospheric reference is not available or desired. This differs from gauge or differential variants in the MPX5700 family.

Does the MPX5700A require external calibration or trimming?

No, the MPX5700A does not require external calibration or trimming. It is fully factory-calibrated for zero offset and full-scale output across temperature, with on-chip temperature compensation circuitry correcting both T_COffset and T_CSpan. The MPX5700A delivers its specified ±2.5% accuracy over 0–85°C without any user adjustment - a key advantage for high-volume manufacturing and field-deployed systems.

What is the recommended power supply decoupling for the MPX5700A?

The MPX5700A requires a 1.0 µF bulk capacitor and a 0.01 µF ceramic capacitor placed close to Pins 2 (GND) and 3 (V_CC), per Figure 4 of the official datasheet. An additional 470 pF capacitor is recommended between V_OUT (Pin 1) and GND to suppress high-frequency noise before ADC sampling. These values ensure stable operation and meet all electrical specifications under dynamic load conditions.

Can the MPX5700A be used with media other than dry air?

The MPX5700A is qualified and characterized using dry air as the pressure medium. While fluorosilicone gel provides broad chemical resistance, exposure to aggressive gases, liquids, or condensing vapors may degrade long-term performance or cause drift. For non-dry-air applications - such as oxygen, CO₂, or humidified gas streams - consult NXP's media compatibility documentation or contact technical support before deployment. The MPX5700A datasheet explicitly warns against unqualified media use.

What are the no-connect pins on the MPX5700A and how should they be handled?

Pins 4 (V1), 5 (V2), and 6 (V_EX) on the MPX5700A are confirmed no-connects per Figure 1 of the datasheet. They have no internal connection to active circuitry and must be left floating. While tying them to GND is permissible for mechanical stability in some layouts, doing so provides no functional benefit and may introduce parasitic capacitance. The safest practice is to leave them unconnected and omit corresponding copper pads on the PCB.