XPS3502 High Voltage High Precision Capacitive Pressure Sensor Signal Conditioner
Product Overview
The XPS3502 is a highly integrated mixed-signal analog voltage output pressure sensor signal conditioner designed for automotive pressure sensors, as well as industrial and process control components. It features amplification, calibration, temperature compensation, and non-linearity compensation to achieve repeatable measurements. Utilizing a proprietary 24-bit DSP signal processor and an integrated 16-bit DAC, it enables digital calibration for offset and span, ensuring interchangeability between sensors. The device integrates a programmable sensor excitation, a 4-stage programmable gain amplifier (PGA), a 20-bit ADC, 512 bytes of internal MTP, a DSP module, a 16-bit DAC, and an internal temperature sensor. An external temperature sensor interface is also provided for remote monitoring and signal processing. The XPS3502 supports flexible client-specific sensor compensation algorithms, including up to third-order temperature drift calibration for zero point and sensitivity, and up to third-order non-linearity calibration. It operates in both proportional voltage and fixed reference voltage modes, with programmable output voltage limiting to prevent overshoot. The device includes over-voltage protection, supports JFET high-voltage supply or direct high-voltage supply, and offers sensor diagnostic functions. Available in 10 or 16-pin packages, it supports commercial, industrial, and automotive temperature ranges and offers a calibration system (including host software and hardware). The XPS3502 supports I2C and DIO single-bus communication, catering to most client interface needs, with DIO supporting bus communication for mass production calibration.
Product Attributes
- Brand: (Xinpu Technology)
- Product Name: XPS3502
Applications
- Capacitive Pressure Sensors
- Transmitters
- Pressure Calibrators and Controllers
- Ventilators
- Instruments and Meters
Key Features
- Amplification, calibration, temperature compensation, and non-linear compensation
- Supports client sensor compensation algorithm calibration
- Supports 15pF differential capacitance input, 1-70pF common-mode capacitance input
- Supports DIO single-wire serial and I2C communication
- Signal gain up to 40x
- Supports multi-point calibration temperature correction via internal MTP lookup table
- Supports voltage mode for bridge-connected sensors
- Supports direct high-voltage supply up to 36V
- Supports bus communication (DIO and IIC)
- Power supply end can withstand positive pressure up to 36V
- Adjustable output voltage limiting
- Selectable internal or external temperature detection
- Self-diagnostic function for sensor connection power and output
- Operating temperature range: -40C to +125C
- Low current consumption (approx. 1mA, excluding sensor)
- Power-on response time < 3ms
Supported Outputs
- Selectable proportional voltage and fixed reference voltage output modes
- Programmable output voltage limiting
- Selectable analog output (OUT) or digital output (I2C)
Technical Specifications
| Parameter | Symbol | Condition | Min | Typical | Max | Unit |
| Absolute Maximum Ratings |
| Supply Voltage | VDDH | | 0 | | 40 | V |
| Operating Temperature Range | | | -40 | | +125 | C |
| Storage Temperature Range | | | -50 | | +150 | C |
| Junction Temperature | | | | | +150 | C |
| ESD Range (HBM) | | | | 3 | | KV |
| Electrical Characteristics (Unless otherwise specified, VDDH = +5V, GND = 0V, TA = +25C) |
| High Voltage Supply Voltage | VDDH | 0.1uF bypass capacitor recommended | 5.5 | | 36.0 | V |
| Operating Current | IDD | (Note 1) | | 1.3 | | mA |
| Max MTP Write Current | IVDDH | 7.0VDDH7.2 | | 8.0 | | mA |
| Max MTP Read Current | IVDDH | 7.0VDDH7.2 | | 10 | | uA |
| Internal Oscillator Frequency | fosc | | | 8.0 | | MHz |
| Power-on Stabilization Time | | | | 3.8 | | ms |
| Response Time | | | | 2.32 | | ms |
| Capacitance Input Offset Range | CIRO | | -15 | | 15 | pF |
| ADC Resolution | | | | 20 | | Bits |
| Excitation Frequency (CIN pin) | | | | 32 | | KHz |
| Signal Gain Range (Note 7) | | | | | 40 | times |
| Max Output Voltage Range (Open Load) | VOUT | Voltage difference with VDD and GND | 0.01 | | | V |
| Output Low Level (Sink Current, IOUT = 1mA) | | TA = TMIN to TMAX | 0.05 | 0.10 | | V |
| Output High Level (Source Current, IOUT = 1mA) | | TA = TMIN to TMAX | | 4.9 | 4.95 | V |
| OUT Short Circuit Current | IOUTMAX | OUT shorted to VDD | | 4.7 | | mA |
| | OUT shorted to GND | 3.9 | | | - |
| -3dB Bandwidth | f-3dB | Cload=100nF, Rload=100k | | 1.6 | | kHz |
| Recommended Load Capacitance Range | Cload | | | 100 | | nF |
| Output Noise (RMS) | VNRMS | Min gain, Cload=100nF | | 0.5 | | mVrms |
| DAC Resolution | | | | 16 | | Bits |
| Offset DAC Resolution (IRODAC) | | Includes symbol bits | | 5 | | Bits |
| IRODAC Bit Weight (Input referred) | VOUT/ Code | DAC reference = VDD = +5.0V (Note 4) | | 1 | | pF/bit |
| Temperature ADC Resolution | | | | 10 | | Bits |
| Offset | | | 15 | | | LSB |
| Gain | | | 0.4 | | | /bit |
| Non-linearity | | | 1 | | | LSB |
| Lowest Digital Output (-40) | | | A3 hex | | | |
| Highest Digital Output (150) | | | | | 25A hex | |
| External Temperature Detection Voltage Range | VEXTEMP | TEMP external sensor (Note 5) | 0mV | | 900 mV | |
| TEMP Output Current | IEXTEMP | TA = TMIN to TMAX (Note 5) | | 5 | | uA |
| Min MTP Write Time (1 Byte) | | (Note 6) | | 1 | | ms |
| Program Pulse Width | | | | 1 | | ms |
Ordering Information
| Model | Temperature Range | Package Type |
| XPS3502AN10E | -40 to +125 | MSOP10* |
| XPS3502AB16E | -40 to +125 | SSOP16* |
| XPS3502AE | -40 to +125 | Bare Die* |
*Temperature range designed for guarantee, tested at room temperature.
Calibration System
| Model | Channels | Notes |
| XPS350X_CALI_MB_V1.0 | 64 | RS485 interface allows multi-level cascading. |
2510232000_XINPU-TECHNOLOGY-XPS3502AN10E_C49490523.pdf
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Capacitive pressure sensor signal conditioner with integrated 20 bit ADC and DSP module XINPU TECHNOLOGY XPS3502AN10E Images
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